2,288 California wineries listed alphabetically on WineRelease.com with links to info page. Last updated May 29, 2024.
If you don't see a winery listed, please email mailATWineRelease.com and replace "AT" with"@". and indicate the winery. We will make an extra effort to get wine release information for that winery. Thanks!
Winery Name; Winery Location
- 12C Wines; United States: California: North Coast: Napa County: Rutherford
- 1467 Cellars; United States: California: North Coast: Napa County: Napa Valley
- 19 Crimes; United States: California
- 2880 Wines; United States: California: North Coast: Napa County: Calistoga
- 4 Winds; United States: California: North Coast: Napa County: Stags Leap District
- 601 Cellars; United States: California: North Coast: Napa County: Napa Valley
- 70s Love Wine; United States: California: North Coast: Napa County: St. Helena
- 84 Wines; United States: California: North Coast: Napa County: Napa Valley
- A Rafanelli Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- A Tribute to Grace Wine Company; United States: California: Central Coast: Santa Barbara County
- A.P. VIN; United States: California
- Aaron Wines; United States: California: Central Coast
- Abiouness; United States: California: North Coast: Napa County: Los Carneros
- Abreu Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Acacia Vineyard (no longer in business); United States: California: North Coast: Sonoma County: Carneros
- Accendo Cellars; United States: California: North Coast: Napa County: St. Helena
- Accenti Wines; United States: California: North Coast: Napa County: Napa Valley
- Acidity Trip; United States: California
- Ackerman Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Acorn Winery (no longer in business); United States: California: North Coast: Sonoma County: Russian River Valley
- Acquiesce Winery; United States: California: Inland Valley: San Joaquin County: Lodi
- Acumen; United States: California: North Coast: Napa County: Atlas Peak
- Ad Vivum; United States: California: North Coast: Napa County: Napa Valley
- ADAMVS; United States: California: North Coast: Napa County: Howell Mountain
- Adastra Wines; United States: California: North Coast: Napa County: Napa Valley
- Addax; United States: California
- Addendum; United States: California: North Coast: Napa County: Napa Valley
- Adelaida Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Adler Deutsch Vineyard; United States: California: North Coast: Napa County: St. Helena
- Adobe Road Winery; United States: California: North Coast
- Adrian Fog Winery; United States: California: North Coast: Mendocino County: Anderson Valley
- AEquitas Vineyards; United States: California: North Coast: Napa County: Atlas Peak
- Aeris; United States: California
- Afterwords Wines; United States: California: North Coast: Napa County: Napa Valley
- Agajanian Vineyards; United States: California: North Coast: Sonoma County
- Agharta; United States: California: North Coast: Sonoma County
- Ahlgren Vineyard; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Ahnfeldt Wines; United States: California: North Coast: Napa County: Napa Valley
- Aida Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Aiken Wines (no longer in business); United States: California: North Coast: Napa County: Calistoga
- Akash Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Alban Vineyards; United States: California: Central Coast: San Luis Obispo County
- Albini Family Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Alder; United States: California: Central Coast: Santa Barbara County
- Alejandro Bulgheroni Estate (now Lithology); United States: California: North Coast: Napa County: St. Helena
- Alexander Valley Vineyards; United States: California: North Coast: Sonoma County: Alexander Valley
- Alfaro Family Vineyard; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Allegro Cellars; United States: California
- Allora Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Alma Rosa Winery and Vineyards; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Alma Sol Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Almacerro; United States: California: North Coast: Napa County: Howell Mountain
- Aloft Wine; United States: California: North Coast: Napa County: Napa Valley
- Alpha Omega Winery; United States: California: North Coast: Napa County: Rutherford
- Alta Colina Vineyard & Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Alta Maria; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Alta Winery; United States: California: North Coast: Napa County: Napa Valley
- Altamura Vineyards & Winery; United States: California: North Coast: Napa County: Napa Valley
- Altisima Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Altus; United States: California: North Coast: Napa County: Napa Valley
- ALTVS Wines; United States: California: North Coast: Napa County: St. Helena
- Alyris Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Alysian Wines; United States: California: North Coast: Sonoma County: Russian River Valley
- Amador Foothill Winery; United States: California: Sierra Foothills
- Amapola Creek Vineyards; United States: California: North Coast: Sonoma County
- AmbRose; United States: California
- Ambullneo Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Amici Cellars; United States: California: North Coast: Napa County: Napa Valley
- Amicitia Wines; United States: California: North Coast: Sonoma County: Alexander Valley
- Amicus Cellars; United States: California: North Coast: Napa County: Napa Valley
- Amista Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Amizetta Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- Amles; United States: California: North Coast: Napa County: Napa Valley
- Ampelos Cellars; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Amphora Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Amulet Estate; United States: California: North Coast: Napa County: Napa Valley
- Amusant; United States: California: North Coast: Napa County: Napa Valley
- Amuse Bouche; United States: California: North Coast: Napa County: Napa Valley
- Anakota Wines; United States: California: North Coast: Sonoma County
- Anapamu Cellars; United States: California: Central Coast
- Ancien Wines; United States: California: North Coast: Napa County: Napa Valley
- Ancient Peaks Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Ancillary Cellars; United States: California: North Coast: Sonoma County: Sonoma Coast
- Andersen Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Anderson's Conn Valley Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Andesite Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Andis Wines; United States: California: Sierra Foothills: Amador County
- Andretti Winery; United States: California: North Coast: Napa County: Napa Valley
- Andrew Geoffrey Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Andrew Murray Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Angel Camp Vineyard; United States: California: North Coast: Mendocino County: Anderson Valley
- Angler Wines; United States: California: North Coast: Napa County: Napa Valley
- Anglim Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Angwin Estate Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Ann Albert Wines; United States: California: Central Coast: Santa Barbara County
- Annadel; United States: California
- Annapolis Winery; United States: California: North Coast: Sonoma County: Sonoma Coast
- Anomaly Vineyards; United States: California: North Coast: Napa County: St. Helena
- Antelope Valley Winery; United States: California: Southern California: Los Angeles County: Antelope Valley
- Anthem Winery; United States: California: North Coast: Napa County: Mt. Veeder
- Anthill Farms Winery; United States: California: North Coast: Sonoma County
- Antica Napa Valley; United States: California: North Coast: Napa County: Napa Valley
- Aperture Cellars; United States: California: North Coast: Sonoma County
- Apriori Cellar; United States: California: North Coast: Napa County: St. Helena
- Apsara Cellars; United States: California: North Coast: Napa County: Calistoga
- Aptos Creek Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Aptos Vineyard; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Aratas; United States: California: North Coast: Napa County: Napa Valley
- Araujo Estate Wines; United States: California: North Coast: Napa County: Napa Valley
- Arbios Cellars; United States: California: North Coast: Sonoma County: Alexander Valley
- Arborum; United States: California: North Coast: Napa County: St. Helena
- Arcadian Winery; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Arcudi Wines; United States: California: North Coast: Napa County: St. Helena
- Arger-Martucci Vineyards; United States: California: North Coast: Napa County: St. Helena
- Argot Wines; United States: California: North Coast: Sonoma County
- Arietta; United States: California: North Coast: Napa County: Napa Valley
- Arista Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Arkenstone Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Armida Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Armstrong Ranch; United States: California: North Coast: Napa County: Napa Valley
- Arnot-Roberts; United States: California
- Arns Winery; United States: California: North Coast: Napa County: St. Helena
- Arnyca Cellars; United States: California: North Coast: Napa County: Napa Valley
- Arrow&Branch; United States: California: North Coast: Napa County: Napa Valley
- Arrowood Vineyards and Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Arroyo Robles Cellars; United States: California
- Artesa Winery; United States: California: North Coast: Napa County: Napa Valley
- Artevino Wine; United States: California: North Coast: Mendocino County: Anderson Valley
- Artezin Wines; United States: California: North Coast: Napa County: Napa Valley
- Arthur Earl Winery; United States: California: Central Coast: Santa Barbara County
- Ascension Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Ashes & Diamonds; United States: California: North Coast: Napa County: Napa Valley
- Aston Estate; United States: California: Southern California
- Astrale e Terra Winery; United States: California: North Coast: Napa County: Napa Valley
- Atalon Winery; United States: California
- Athair; United States: California: North Coast: Sonoma County: Russian River Valley
- Au Bon Climat; United States: California: Central Coast: Santa Barbara County
- Au Revoir Wines; United States: California: North Coast: Napa County: Napa Valley
- Au Sommet Winery; United States: California: North Coast: Napa County: Atlas Peak
- Aubert Wines; United States: California: North Coast: Napa County: Napa Valley
- Aubin Cellars; United States: California: North Coast: Sonoma County: Russian River Valley
- AuburnJames Winery; United States: California: North Coast: Napa County: St. Helena
- Audesirk Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Audubon Cellars; United States: California
- August Briggs Wines; United States: California: North Coast: Napa County: Napa Valley
- August West; United States: California
- Aum Cellars; United States: California: North Coast: Napa County: Napa Valley
- Aurielle Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Austin Hope Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Auteur; United States: California: North Coast: Sonoma County
- AVEO Wines (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Aviatrix Wine; United States: California: North Coast: Napa County: Napa Valley
- Axios Wine; United States: California: North Coast: Napa County: Napa Valley
- AXR Winery; United States: California: North Coast: Napa County: Napa Valley
- Azur Wines; United States: California
- B Cellars; United States: California: North Coast: Napa County: Napa Valley
- B Wise Vineyards; United States: California: North Coast: Sonoma County
- B. Kosuge Wines; United States: California: North Coast: Napa County: Napa Valley
- B.R. Cohn Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Babcock Winery & Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Baca Wines; United States: California
- Bacigalupi Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Bacio Divino; United States: California: North Coast: Napa County: Napa Valley
- Backstage Winery; United States: California: North Coast: Napa County: Napa Valley
- Badge Winery; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Bahl Fratty; United States: California: North Coast: Mendocino County
- Baileyana Winery; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Bailiwick Wines (No longer in business); United States: California: North Coast: Sonoma County
- Baily Vineyard & Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Baker & Hamilton; United States: California: North Coast: Napa County: Oakville
- Baker Family Wines; United States: California
- Baldacci Family Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Ballentine Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Balletto Vineyards; United States: California: North Coast: Sonoma County
- Balo Vineyards (no longer in business); United States: California: North Coast: Mendocino County: Anderson Valley
- Balverne; United States: California: North Coast: Sonoma County: Russian River Valley
- Bandiera Winery; United States: California: North Coast: Sonoma County
- Banknote Wine Company; United States: California: North Coast: Napa County: Napa Valley
- Bannister Wines; United States: California: North Coast: Mendocino County: Anderson Valley
- Banyan Wines; United States: California: Central Coast: Monterey County
- Barbour Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Bardessono Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Bargetto Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Barlow Vineyards; United States: California: North Coast: Napa County: Calistoga
- Barnett Vineyards; United States: California: North Coast: Napa County: Spring Mountain District
- Barnwood Vineyards; United States: California: Central Coast: Santa Barbara County
- Barra of Mendocino; United States: California: North Coast: Mendocino County: Redwood Valley
- Barrel 27 Wine Company; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Barrett & Barrett; United States: California: North Coast: Napa County: Napa Valley
- Bartholomew Park Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Battaglini Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Battuello Vineyards; United States: California: North Coast: Napa County: St. Helena
- Baxter Winery; United States: California: North Coast: Mendocino County: Anderson Valley
- Baystone Wines; United States: California: North Coast: Sonoma County
- Beau Marchais; United States: California
- Beaulieu Vineyard; United States: California: North Coast: Napa County: Rutherford
- Beauregard Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Beckmen Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Bedford Thompson Winery; United States: California: Central Coast: Santa Barbara County
- Bedrock Wine Co.; United States: California: North Coast: Sonoma County
- Beekeeper Cellars; United States: California: North Coast: Sonoma County
- Behrens and Hitchcock; United States: California: North Coast: Napa County: Napa Valley
- Behrens Family Winery; United States: California: North Coast: Napa County: Napa Valley
- Bell Wine Cellars; United States: California: North Coast: Napa County: Napa Valley
- Bella Grace Vineyards; United States: California
- Bella Luna Estate Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Bella Oaks; United States: California: North Coast: Napa County: Rutherford
- Bella Vetta; United States: California: North Coast: Napa County: Napa Valley
- Bella Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Belle Glos Wines; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Belle Marie Winery; United States: California
- BelleRose Vineyards; United States: California: North Coast: Sonoma County
- Bello Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Belo Wine Company; United States: California: North Coast: Napa County: Pope Valley
- Belong Wine; United States: California: North Coast: Napa County: Napa Valley
- Belted Vines; United States: California: North Coast: Napa County: Napa Valley
- Belvedere Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Bench Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Benediction Estates; United States: California: North Coast: Napa County: Napa Valley
- Benessere Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Benevolent Neglect; United States: California
- Bennett Lane Winery; United States: California: North Coast: Napa County: Napa Valley
- Benovia Winery; United States: California: North Coast: Sonoma County
- Benson Ferry Vineyards; United States: California: Inland Valley: San Joaquin County: Lodi
- Bent Creek Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Benziger Family Winery; United States: California: North Coast: Sonoma County: Sonoma Mountain
- Beringer Vineyards; United States: California: North Coast: Napa County: St. Helena
- Bernardus Vineyards; United States: California: Central Coast: Monterey County: Carmel Valley
- Bettinelli Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Bevan Cellars; United States: California: North Coast: Napa County: Napa Valley
- Bianchi Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Big Basin Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Big White House; United States: California: Central Coast: Alameda County: Livermore Valley
- Bink Wines; United States: California
- Birdhorse Wines; United States: California
- Birichino; United States: California
- Bishop’s Peak; United States: California: Central Coast
- Black Cat Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Black Kite Cellars; United States: California: North Coast: Mendocino County: Anderson Valley
- Black Sears Estate; United States: California: North Coast: Napa County: Howell Mountain
- Black Stallion Winery; United States: California: North Coast: Napa County: Napa Valley
- Blackbird Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Blackford Wines; United States: California: North Coast: Napa County: Napa Valley
- Blackjack Ranch Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Blackstone Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Blair Estate; United States: California: Central Coast: Monterey County: Arroyo Seco
- Blankiet Estate; United States: California: North Coast: Napa County: Napa Valley
- Blind Dog Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Block Nine Wine; United States: California
- Blue Hall Vineyard; United States: California: North Coast: Napa County: Howell Mountain
- Blue Rock Vineyard; United States: California: North Coast: Sonoma County: Alexander Valley
- Boar's View; United States: California: North Coast: Sonoma County: Sonoma Coast
- Bodacious Wines; United States: California: North Coast: Napa County: Napa Valley
- Bodega Bay Winery and Portworks; United States: California: North Coast
- Bodegas Aguirre Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Bodegas M; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Boeger Winery; United States: California: Sierra Foothills: El Dorado County
- Boeschen Vineyards; United States: California: North Coast: Napa County: St. Helena
- Bogle Winery; United States: California
- Boich Family Cellar; United States: California: North Coast: Napa County: Napa Valley
- Bokisch Vineyards; United States: California: Inland Valley: San Joaquin County: Lodi
- Bolan Wines; United States: California
- Bolen Family Estates; United States: California: North Coast: Napa County: Napa Valley
- Bonaccorsi Wine Company; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- BonAnno Wine; United States: California: North Coast: Napa County: Napa Valley
- BOND; United States: California: North Coast: Napa County: Napa Valley
- Bonded Winery Number 9; United States: California: North Coast: Napa County: Napa Valley
- Bonneau Wines; United States: California: North Coast: Sonoma County
- Bonny Doon Vineyard; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Bonterra Vineyards; United States: California: North Coast: Mendocino County
- Booker Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Bouchaine Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Bougetz Cellars; United States: California: North Coast: Napa County: Napa Valley
- Bounty Hunter Wine; United States: California: North Coast: Napa County: Napa Valley
- Bourassa Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Boyanci; United States: California: North Coast: Napa County: Napa Valley
- Boyd Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Bpinot; United States: California: North Coast: Sonoma County: Russian River Valley
- Bradford Mountain Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Brand Napa Valley; United States: California: North Coast: Napa County: Napa Valley
- Brander Vineyard; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Brandlin Estate; United States: California: North Coast: Napa County: Mt. Veeder
- Brass Tacks Wines; United States: California
- Brassfield Estate; United States: California: High Valley
- Brasswood Estate (formerly Cairdean Estate); United States: California: North Coast: Napa County: Napa Valley
- Bravante Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Brave & Maiden; United States: California: Central Coast: Santa Barbara County
- Bravium; United States: California: North Coast: Napa County: Napa Valley
- Bread & Butter Wines; United States: California: North Coast: Napa County: Napa Valley
- Breggo Cellars; United States: California: North Coast: Mendocino County: Anderson Valley
- Bremer Family Winery; United States: California: North Coast: Napa County: Napa Valley
- Brendel; United States: California: North Coast: Napa County: Napa Valley
- Bressler Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Brewer-Clifton; United States: California: Central Coast: Santa Barbara County
- Brian Arden; United States: California: North Coast: Napa County: St. Helena
- Brick & Mortar; United States: California
- Brick Angel; United States: California: North Coast: Napa County: Napa Valley
- Bridesmaid Wines; United States: California: North Coast: Napa County: Napa Valley
- Bridlewood Estate Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Brilliant Mistake Wines; United States: California: North Coast: Napa County: Napa Valley
- Brion; United States: California: North Coast: Napa County: Napa Valley
- Broc Cellars; United States: California
- Brochelle Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Brogan Cellars; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Broken Earth Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Broken Spur; United States: California
- Broman Cellars; United States: California: North Coast: Napa County: Napa Valley
- Brookdale Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Brookman Cellars; United States: California: North Coast: Napa County: Napa Valley
- Brooks Note Winery; United States: California: North Coast: Sonoma County
- Brown Estate Vineyards; United States: California: North Coast: Napa County: Chiles Valley
- Brue Skok Cellars; United States: California: North Coast: Sonoma County
- Brutocao Cellars; United States: California: North Coast: Mendocino County: Anderson Valley
- Bryant Family Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Bryter Estates; United States: California
- Buccella; United States: California: North Coast: Napa County: Napa Valley
- Bucher Wines; United States: California: North Coast: Sonoma County: Russian River Valley
- Bucklin; United States: California: North Coast: Sonoma County: Sonoma Valley
- Budhagirl Sparkling Wines; United States: California
- Buena Vista; United States: California: North Coast: Sonoma County
- Buoncristiani; United States: California: North Coast: Napa County: Napa Valley
- Bure Family Wines; United States: California: North Coast: Napa County: Napa Valley
- Burgess Cellars; United States: California: North Coast: Napa County: Napa Valley
- Burly; United States: California: North Coast: Napa County: Napa Valley
- Burrell School Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Burt Street Cellars; United States: California: North Coast: Sonoma County
- Busby Cellars; United States: California: Sierra Foothills
- Buselli; United States: California: North Coast: Napa County: Oakville
- Butterfly Creek Winery; United States: California: Sierra Foothills
- Buttonwood Farm Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Byington Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Byron Blatty; United States: California: Southern California: Los Angeles County
- Byron Vineyards & Winery; United States: California: Central Coast: Santa Barbara County
- Ca’ Momi; United States: California: North Coast: Napa County: Napa Valley
- Cabot Vineyards; United States: California: Other California: Humboldt County
- Cache Creek Vineyards and Winery; United States: California: North Coast: Lake County
- Cade Winery; United States: California: North Coast: Napa County: Napa Valley
- Cafaro Cellars; United States: California: North Coast: Napa County: Napa Valley
- Cain Vineyard and Winery; United States: California: North Coast: Napa County: Napa Valley
- Cakebread Cellars; United States: California: North Coast: Napa County: Rutherford
- Caladan Wines; United States: California: North Coast: Napa County: Napa Valley
- Calafia Cellars; United States: California: North Coast: Napa County: Mt. Veeder
- Calcareous Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Calculated Risk Winery; United States: California: North Coast: Napa County
- Calder Wine Company; United States: California: North Coast: Napa County: Napa Valley
- Caldwell Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Cale Cellars; United States: California: North Coast: Sonoma County: Sonoma Valley
- Calera Wine Company; United States: California: Central Coast
- Calistoga Cellars; United States: California: North Coast: Napa County: Napa Valley
- Caliza Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Calla Lily Vineyards and Winery; United States: California: North Coast: Napa County: Pope Valley
- Callaway Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Calle Cielo Cellars; United States: California: Central Coast: Santa Barbara County
- Calmere Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- Calstar Cellars; United States: California: Inland Valley: San Joaquin County: Lodi
- Cambiata Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Cambria Winery; United States: California: Central Coast: Santa Barbara County
- Camelot Vineyards; United States: California
- Cameron Hughes Wine; United States: California
- Cami Vineyards; United States: California: North Coast: Napa County: Calistoga
- Camins 2 Dreams; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Campion Wines; United States: California: North Coast: Napa County: Napa Valley
- Campovida; United States: California: North Coast: Sonoma County: Russian River Valley
- Canard; United States: California: North Coast: Napa County: Napa Valley
- Candor Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Cantiga Wineworks; United States: California: Sierra Foothills: El Dorado County
- Canyon Road Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Caparone Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Capay Valley Vineyards; United States: California
- Capiaux Cellars; United States: California: Central Coast: Santa Clara County
- Capture; United States: California: North Coast: Sonoma County: Alexander Valley
- Caraccioli Cellars; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Carboniste; United States: California: North Coast
- Cardinale Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- Cargasacchi Wines; United States: California: Central Coast
- Carica; United States: California: North Coast: Sonoma County
- Carina Cellars; United States: California: Central Coast: Santa Barbara County
- Carini; United States: California
- Carlisle Winery & Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Carlotta Cellars; United States: California: North Coast
- Carmel Road Winery; United States: California: Central Coast: Monterey County
- Carmody McKnight; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Carne Humana; United States: California: North Coast: Napa County: Napa Valley
- Carneros Creek Winery; United States: California: North Coast: Napa County: Napa Valley
- Carneros della Notte; United States: California: North Coast: Napa County: Los Carneros
- Carol Shelton Wines; United States: California: North Coast: Sonoma County: Russian River Valley
- Carpenter Wine; United States: California: North Coast: Sonoma County
- Carr Vineyards and Winery; United States: California: Central Coast: Santa Barbara County
- Carrefour Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Carte Blanche; United States: California: North Coast
- Carter Cellars; United States: California: North Coast: Napa County: Calistoga
- Cartlidge & Browne Winery; United States: California: North Coast: Napa County: Napa Valley
- Carver Sutro Wines; United States: California: North Coast: Napa County: Napa Valley
- Casa Carneros; United States: California: North Coast: Napa County: Los Carneros
- Casa Cassara Winery & Vineyard; United States: California: Central Coast: Santa Barbara County
- Casa Nuestra; United States: California: North Coast: Napa County: Napa Valley
- Casa Piena; United States: California: North Coast: Napa County: Napa Valley
- Casaeda Wines; United States: California
- Casino Mine Ranch; United States: California: Sierra Foothills: Amador County
- Cass Vineyards and Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Cast Wines; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Castalia Wines; United States: California: North Coast: Sonoma County: Russian River Valley
- Castello di Amorosa; United States: California: North Coast: Napa County: Napa Valley
- Castiel Estate; United States: California: North Coast: Napa County: Napa Valley
- Castle Vineyards and Winery (no longer in business); United States: California: North Coast: Sonoma County: Sonoma Valley
- Castoro Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Cathiard Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Caton Vineyards; United States: California: North Coast: Sonoma County: Sonoma Valley
- Cavus Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Caymus Vineyards; United States: California: North Coast: Napa County: Rutherford
- Cedar Mountain Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Cedarville Vineyard; United States: California: Sierra Foothills: El Dorado County
- Ceja Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Celani Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Cellars 33; United States: California: North Coast
- Cenyth Wines; United States: California: North Coast: Sonoma County
- Ceritas Wines; United States: California: North Coast: Sonoma County
- Cerro Caliente Cellars; United States: California: Central Coast: San Luis Obispo County
- Cerro Prieto Vineyard & Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Cervantes Family Vineyards; United States: California: North Coast: Napa County: Pope Valley
- Chaix Wines; United States: California: North Coast: Napa County: Rutherford
- Chalk Hill Winery; United States: California: North Coast: Sonoma County: Chalk Hill
- Challen Winery; United States: California: Central Coast: Santa Barbara County
- Chalone Vineyard; United States: California: Central Coast: Monterey County
- Chameleon Cellars; United States: California: North Coast: Napa County: Napa Valley
- Chamisal Vineyards; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Chaname Wines; United States: California: North Coast: Sonoma County
- Chanin; United States: California: Central Coast: Santa Barbara County
- Chanticleer; United States: California: North Coast: Napa County: Napa Valley
- Chappellet Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Charles Creek; United States: California: North Coast: Sonoma County
- Heintz; United States: California: North Coast: Sonoma County: Sonoma Coast
- Charles Hendricks Wines; United States: California: North Coast: Napa County: Napa Valley
- Twenty Four Wines; United States: California: North Coast: Napa County: Napa Valley
- Charnu Winery (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Charter Oak Winery; United States: California: North Coast: Napa County: St. Helena
- Chase Cellars; United States: California: North Coast: Napa County: Napa Valley
- Chasseur Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Chateau Boswell Winery; United States: California: North Coast: Napa County: St. Helena
- Chateau Christina/Joyce Vineyard; United States: California: Central Coast: Monterey County: Carmel Valley
- Chateau Felice; United States: California: North Coast: Sonoma County: Chalk Hill
- Chateau Julien Wine Estate; United States: California: Central Coast: Monterey County: Carmel Valley
- Chateau Margene; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Chateau Montelena Winery; United States: California: North Coast: Napa County: Napa Valley
- Chateau Potelle; United States: California: North Coast: Napa County: Napa Valley
- Chateau Rodin Winery; United States: California: Sierra Foothills
- Chateau Routon; United States: California: Sierra Foothills
- Chateau Sinnet; United States: California: Central Coast: Monterey County: Carmel Valley
- Chateau Souverain; United States: California: North Coast: Sonoma County: Alexander Valley
- Chateau St. Jean; United States: California: North Coast: Sonoma County: Sonoma Valley
- Checkerboard Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Chenoweth Wines; United States: California: North Coast: Sonoma County: Green Valley of Russian River Valley
- Cherry Pie Wine; United States: California
- Chev Wine; United States: California: North Coast: Sonoma County: Russian River Valley
- Chien Wines; United States: California: Central Coast: Santa Barbara County
- Chimere Winery; United States: California: Central Coast: San Luis Obispo County
- Chimney Rock Winery; United States: California: North Coast: Napa County: Stags Leap District
- Chiron Wines; United States: California
- Chouinard Vineyards; United States: California: Central Coast: Alameda County: Livermore Valley
- Christopher Creek Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Chumeia Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Cielo Estate; United States: California: Sierra Foothills: El Dorado County
- Cilurzo Vineyard & Winery ; United States: California: Southern California: Riverside County: Temecula Valley
- Cima Collina; United States: California: Central Coast: Monterey County
- Cimarossa; United States: California: North Coast: Napa County: Napa Valley
- Cinnabar Vineyards and Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Cirq; United States: California: North Coast: Sonoma County: Russian River Valley
- Claiborne & Churchill Winery; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Clarice Wine Company; United States: California
- Clark-Claudon Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Clary Ranch Wines; United States: California: North Coast: Sonoma County: Sonoma Coast
- Clayhouse; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Clif Family Winery; United States: California: North Coast: Napa County: St. Helena
- Cliff Lede Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Cline Cellars; United States: California: North Coast: Sonoma County
- Cloninger Cellars ; United States: California: Central Coast: Monterey County
- Clos du Lac Cellars/Greenstone Winery; United States: California: Sierra Foothills: Amador County
- Clos Du Val; United States: California: North Coast: Napa County: Stags Leap District
- Clos LaChance; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Clos Mimi (no longer in business); United States: California: Central Coast: San Luis Obispo County
- Clos Pegase Winery; United States: California: North Coast: Napa County: Napa Valley
- Clos Pepe; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Clos Saron; United States: California: Sierra Foothills
- Clos Tita Winery ; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Cloud View Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Cobb Wines; United States: California: North Coast: Sonoma County: Sonoma Coast
- Cobden Wini; United States: California: North Coast: Sonoma County
- Cockerell Wines; United States: California: North Coast: Napa County: Napa Valley
- Coho Wines; United States: California: North Coast: Napa County: Napa Valley
- Cole Bailey Vineyards; United States: California: North Coast: Mendocino County: Redwood Valley
- Colgin Cellars; United States: California: North Coast: Napa County: Napa Valley
- Colibri Ridge Winery; United States: California: Sierra Foothills
- Collier Falls Vineyard; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Com' è Bella Vineyards; United States: California: Sierra Foothills
- ¿Como No?; United States: California: North Coast: Napa County: Napa Valley
- Complant Wine; United States: California: North Coast: Napa County: Napa Valley
- Concannon Vineyard; United States: California: Central Coast: Alameda County: Livermore Valley
- Coniglio Wines; United States: California: North Coast: Napa County: Napa Valley
- Conn Creek Winery; United States: California: North Coast: Napa County: St. Helena
- Consilience; United States: California: Central Coast: Santa Barbara County
- Constant Winery; United States: California: North Coast: Napa County: Napa Valley
- Continuum; United States: California: North Coast: Napa County: Napa Valley
- Conundrum Wines; United States: California
- Convene; United States: California: North Coast: Sonoma County
- Cooper-Garrod Estate Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Copain Wines; United States: California: North Coast: Sonoma County
- Copeland Creek Vineyards; United States: California: North Coast: Sonoma County: Sonoma Coast
- Copia Vineyards and Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Copper Bear; United States: California: North Coast: Napa County: Napa Valley
- Coquerel Wines; United States: California: North Coast: Napa County: Calistoga
- Cordant Nelle Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Cordon Creek; United States: California: Sierra Foothills: El Dorado County
- Core; United States: California: Central Coast: Santa Barbara County
- Corison Winery; United States: California: North Coast: Napa County: St. Helena
- Cornerstone Cellars; United States: California: North Coast: Napa County: Napa Valley
- Corralitos Ridge Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Correlation Wine Company; United States: California: North Coast: Napa County: Napa Valley
- Cosa Obra; United States: California: North Coast: Sonoma County
- Cosentino Winery; United States: California: North Coast: Napa County: Oakville
- Cosmos Cellars; United States: California: North Coast: Napa County: Napa Valley
- Cotiere; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Cottonwood Canyon Winery; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Coturri Winery; United States: California: North Coast: Sonoma County
- County Line Vineyards; United States: California: North Coast
- Coup De Foudre Wine; United States: California: North Coast: Napa County: Napa Valley
- Couravant; United States: California: North Coast: Napa County: Napa Valley
- Coursey Graves; United States: California: North Coast: Sonoma County: Sonoma Valley
- Covenant Wines; United States: California: North Coast: Napa County: Napa Valley
- Covert Estate; United States: California: North Coast: Napa County: Coombsville
- Crane Canyon; United States: California
- Crane Family Vineyards; United States: California: North Coast: Napa County: Mt. Veeder
- CrauforD Wine Company; United States: California: North Coast: Napa County: Napa Valley
- Crazy Flower Wines; United States: California: North Coast: Napa County: Napa Valley
- Creekview Vineyards; United States: California
- Crescere Wines; United States: California: North Coast: Sonoma County
- Cresta Velia Wines; United States: California: North Coast: Napa County: Howell Mountain
- Crichton Hall Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Crist Family Vineyard; United States: California: Central Coast: Monterey County: Carmel Valley
- Crocker and Starr Winery; United States: California: North Coast: Napa County: St. Helena
- Croix Estate; United States: California: North Coast: Sonoma County: Russian River Valley
- Croma Vera; United States: California: Central Coast: San Luis Obispo County
- Crosby Roamann; United States: California: North Coast: Napa County: Napa Valley
- Crossbarn; United States: California
- Croze; United States: California: North Coast: Napa County: Napa Valley
- Crush Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Crystal Basin Cellars; United States: California: Sierra Foothills: El Dorado County
- Cuda Ridge Wines; United States: California: Central Coast: Alameda County: Livermore Valley
- Culler Wines; United States: California: North Coast: Napa County: Napa Valley
- Cult Vines; United States: California
- Cultivar; United States: California: North Coast: Napa County: Napa Valley
- Cupcake Vineyards; United States: California: Central Coast: Alameda County: Livermore Valley
- Curran; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Curtis Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Cuvaison Winery; United States: California: North Coast: Napa County: Napa Valley
- D-Cubed Cellars (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- D. R. Stephens Estate; United States: California: North Coast: Napa County: Napa Valley
- D’Alfonso-Curran; United States: California: Central Coast: San Luis Obispo County
- D'Anbino Vineyards (no longer in business); United States: California: Central Coast: San Luis Obispo County: Paso Robles
- D'Argenzio Winery; United States: California: North Coast: Sonoma County
- Dacalier Wine Co.; United States: California: North Coast: Napa County: Napa Valley
- Dakota Shy Wine; United States: California: North Coast: Napa County: Napa Valley
- Dalla Valle Vineyard; United States: California: North Coast: Napa County: Oakville
- Dana Estates; United States: California: North Coast: Napa County: Napa Valley
- Dancing Hares; United States: California: North Coast: Napa County: St. Helena
- Dane Cellars; United States: California: North Coast: Sonoma County: Sonoma Valley
- Daniel Gehrs Wines (no longer in business); United States: California: Central Coast: Santa Barbara County
- Daou Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Darcie Kent Vineyards; United States: California: Central Coast: Alameda County: Livermore Valley
- Darioush Winery; United States: California: North Coast: Napa County: Napa Valley
- Dark Matter; United States: California: North Coast: Napa County: Howell Mountain
- Darms Lane Wine; United States: California: North Coast: Napa County: Napa Valley
- Dashe Cellars; United States: California: North Coast: Sonoma County
- Daviana Winery; United States: California: North Coast: Napa County: Napa Valley
- David Arthur Vineyards; United States: California: North Coast: Napa County: Napa Valley
- David Bruce Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- David Coffaro; United States: California: North Coast: Sonoma County: Dry Creek Valley
- David Family Wines (no longer in business); United States: California: Central Coast
- David Fulton Winery; United States: California: North Coast: Napa County: St. Helena
- David Girard Vineyards; United States: California: Sierra Foothills: El Dorado County
- Davis Bynum Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Davis Estates; United States: California: North Coast: Napa County: Napa Valley
- Davis Family Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Dawn's Dream Winery; United States: California: Central Coast: Monterey County
- Day Zinfandel; United States: California: North Coast: Sonoma County
- De Loach Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- De Novo Wines; United States: California: North Coast: Sonoma County
- De Tierra Vineyard; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Deaver Vineyards; United States: California: Sierra Foothills
- DeBiase; United States: California: North Coast: Sonoma County
- Decoy Wines; United States: California
- Deerfield Ranch Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Dehlinger Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Del Bondio Family Vineyards; United States: California: North Coast: Napa County: Rutherford
- Del Dotto Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Delectus Winery; United States: California: North Coast: Napa County: Napa Valley
- Delfino Farms; United States: California: Sierra Foothills
- Delgadillo Cellars; United States: California: North Coast: Napa County: Napa Valley
- deLorimier Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Demetria Estate; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Denner Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Deovlet Wines; United States: California: Central Coast: San Luis Obispo County
- Derby Wine Estates; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Derenoncourt California; United States: California: North Coast: Napa County: Napa Valley
- DeSante Wines; United States: California: North Coast: Napa County: Napa Valley
- Desire Lines Wine Co; United States: California: North Coast: Sonoma County
- Desparada Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Destino Wines; United States: California: North Coast: Napa County: Napa Valley
- Details; United States: California: North Coast: Sonoma County
- Detert Family Vineyards; United States: California: North Coast: Napa County: Oakville
- Di Arie Vineyard & Winery; United States: California: Sierra Foothills
- Di Costanzo; United States: California: North Coast: Napa County: Napa Valley
- Diamond Creek Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Diamond Terrace; United States: California: North Coast: Napa County: Napa Valley
- Diamondback Vineyards; United States: California: North Coast: Mendocino County
- Diatom; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Dilecta Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Dillon Creek Vineyard; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Diogenes Wines; United States: California: North Coast: Napa County: Napa Valley
- Dirty & Rowdy Family Winery; United States: California
- DK Grail; United States: California: North Coast: Sonoma County
- dkcellars; United States: California: Sierra Foothills: El Dorado County
- Dobra Zemlja Winery; United States: California: Sierra Foothills: Amador County
- Doffo Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Domaine Alfred Winery; United States: California: Central Coast: San Luis Obispo County
- Domaine Carneros; United States: California: North Coast: Napa County: Napa Valley
- Domaine Chandon; United States: California: North Coast: Napa County: Napa Valley
- Domaine Charbay; United States: California: North Coast: Napa County: Napa Valley
- Domaine Curry; United States: California: North Coast: Napa County: Napa Valley
- Domaine De La Cote; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Domaine de la Terre Rouge; United States: California: Sierra Foothills
- Domaine Della; United States: California: North Coast: Sonoma County
- Dominus Estate; United States: California: North Coast: Napa County: Napa Valley
- Donati Family Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Donelan Family Wines; United States: California: North Coast: Sonoma County
- Donkey and Goat; United States: California
- Doren Wines; United States: California: North Coast: Sonoma County
- Dos Lagos Vineyards; United States: California: North Coast: Napa County: Atlas Peak
- Double Diamond Wines; United States: California: North Coast: Napa County: Napa Valley
- Dough Wines; United States: California: North Coast
- Dover Canyon Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Downing Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Dracaena Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Dragonette Cellars; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Dreaming Tree Wines; United States: California
- Drew; United States: California: North Coast: Mendocino County
- Dreyer Sonoma; United States: California: North Coast: Sonoma County: Sonoma Valley
- Drinkward Peschon; United States: California: North Coast: Napa County: St. Helena
- Driscoll Wine Co; United States: California: North Coast: Napa County: Napa Valley
- DRNK Wines; United States: California: North Coast: Sonoma County: Russian River Valley
- Dry Creek Vineyard; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Dubost; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Duchamp Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Duckhorn Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Due Cani Cellars; United States: California
- Due Vigne di Famiglia; United States: California: North Coast: Napa County: Napa Valley
- Duhig Vineyard; United States: California: North Coast: Napa County: Napa Valley
- DuMol Wine Company; United States: California: North Coast: Sonoma County: Russian River Valley
- Duncan Peak Vineyards; United States: California: North Coast: Mendocino County
- Dunn Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Dunning Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Dunstan; United States: California: North Coast: Sonoma County: Sonoma Coast
- DuPuis Wines; United States: California: North Coast: Mendocino County: Anderson Valley
- Durney Vineyards; United States: California: Central Coast: Monterey County: Carmel Valley
- Dusinberre Cellars; United States: California: North Coast: Napa County: Napa Valley
- Dutch Bill Creek Winery; United States: California: North Coast: Sonoma County
- Dutch Henry Winery; United States: California: North Coast: Napa County: Napa Valley
- Dutton-Goldfield; United States: California: North Coast: Sonoma County: Russian River Valley
- DVO; United States: California: North Coast: Napa County: Napa Valley
- Dyer Wines; United States: California: North Coast: Napa County: Napa Valley
- Eagle Eye; United States: California: North Coast: Napa County: Napa Valley
- Eaglepoint Ranch (no longer in business); United States: California: Ukiah Valley
- Eagles Trace; United States: California: North Coast: Napa County: St. Helena
- Earthshine Wines; United States: California: North Coast: Napa County: Napa Valley
- Easton Wines; United States: California: Sierra Foothills
- Eberle Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Eclectic Wines; United States: California: North Coast: Napa County: Napa Valley
- Ecluse Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Edge Hill; United States: California: North Coast: Napa County: Napa Valley
- Edge Wines; United States: California: North Coast: Napa County: Napa Valley
- Edna Valley Vineyard; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Edward Sellers; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Eeden Vineyards; United States: California: North Coast: Napa County: Spring Mountain District
- Egelhoff Wines; United States: California: North Coast: Napa County: Napa Valley
- Ehlers Estate; United States: California: North Coast: Napa County: Napa Valley
- Ehrenberg Cellars; United States: California: Central Coast: Alameda County: Livermore Valley
- Ehret Family Winery; United States: California: North Coast: Sonoma County: Knights Valley
- Ehrlich Vineyard; United States: California: North Coast: Napa County: Oakville
- El Lugar; United States: California: Central Coast
- El Molino Winery; United States: California: North Coast: Napa County: Napa Valley
- Elan Vineyards; United States: California: North Coast: Napa County: Atlas Peak
- Element 79 Vineyards; United States: California: Sierra Foothills: El Dorado County
- Eleven Eleven Wines; United States: California: North Coast: Napa County: Napa Valley
- Elizabeth Spencer Wines; United States: California: North Coast: Napa County: Napa Valley
- Elke Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Elkhorn Peak Cellars; United States: California: North Coast: Napa County: Napa Valley
- Elliston Vineyards; United States: California: Central Coast: Alameda County: Livermore Valley
- Ellman Family Vineyards; United States: California: North Coast
- Elyse Winery; United States: California: North Coast: Napa County: Napa Valley
- Emerson Brown Wines; United States: California: North Coast: Napa County: Napa Valley
- EMH Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Emilio's Terrace; United States: California: North Coast: Napa County: Napa Valley
- Emmolo Wine Co.; United States: California: North Coast: Napa County: Rutherford
- En Tirage; United States: California: North Coast: Sonoma County
- Enkidu Wine; United States: California: North Coast: Sonoma County
- EnRoute; United States: California: North Coast: Sonoma County: Russian River Valley
- Entre Nous; United States: California: North Coast: Napa County: Napa Valley
- Envy Wines; United States: California: North Coast: Napa County: Napa Valley
- EOS Estate Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Epiphany Cellars; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Epoch Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Eponymous; United States: California: North Coast: Napa County: Oakville
- Equality Vines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Equinox; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Eric Guerra Wines; United States: California: North Coast: Sonoma County
- Eric Ross Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Eric|Kent Wine Cellars; United States: California: North Coast: Sonoma County
- Erna Schein Winery; United States: California: North Coast: Napa County: Napa Valley
- Ernest Vineyards; United States: California: North Coast: Sonoma County
- Esca Wines; United States: California: North Coast: Napa County: Napa Valley
- Escafeld Vineyards; United States: California: Central Coast: Monterey County
- Estancia Estates; United States: California: North Coast: Napa County: Rutherford
- Ethan; United States: California: Central Coast
- Ettore Wine; United States: California: North Coast: Mendocino County
- Etude Wines; United States: California: North Coast: Napa County: Napa Valley
- Euclid Wines; United States: California: North Coast: Napa County: Napa Valley
- Europa Village; United States: California: Southern California: Riverside County: Temecula Valley
- Evidence Wines; United States: California: North Coast: Napa County: Napa Valley
- Extradimensional Wine Co. Yeah!; United States: California
- F. Teldeschi Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Failla; United States: California: North Coast: Napa County: Napa Valley
- Fairchild Estate; United States: California: North Coast: Napa County: Napa Valley
- Fairest Creature; United States: California: North Coast: Napa County: Napa Valley
- Fait-Main Wines; United States: California: North Coast: Napa County: Napa Valley
- Falcor Wine Cellars; United States: California: North Coast: Napa County: Napa Valley
- Falkner Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Fallon Place Wines; United States: California: North Coast: Sonoma County
- Fantesca Vineyards & Estate; United States: California: North Coast: Napa County: Spring Mountain District
- Fanucchi Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Far Niente Winery; United States: California: North Coast: Napa County: Oakville
- Farm Napa Valley; United States: California: North Coast: Napa County: Napa Valley
- Faust; United States: California: North Coast: Napa County: Napa Valley
- Favero Vineyards & Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Favia; United States: California
- Fe Wines; United States: California: North Coast: Napa County: Spring Mountain District
- Fearless Wines; United States: California: North Coast: Napa County: Napa Valley
- Fel Wines; United States: California: North Coast
- Fenestra Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Ferrari-Carano Vineyards and Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Ferren; United States: California: North Coast: Sonoma County: Sonoma Coast
- Fess Parker; United States: California: Central Coast: Santa Barbara County
- Fiddlehead Cellars; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Fiddletown Cellars; United States: California: Sierra Foothills
- Fife Vineyards; United States: California: North Coast: Mendocino County: Redwood Valley
- FiftyRow; United States: California: North Coast
- Filaments; United States: California
- Filomena Wine Co.; United States: California: North Coast: Sonoma County
- Filsinger Winery (no longer in business); United States: California: Southern California: Riverside County: Temecula Valley
- Fire Station Red; United States: California
- Firestone Vineyard; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Fisher Vineyards; United States: California: North Coast: Sonoma County
- Fisticuffs; United States: California: North Coast: Napa County: Napa Valley
- Fitzpatrick Winery; United States: California: Sierra Foothills: El Dorado County
- Five Vintners; United States: California: North Coast: Napa County: Napa Valley
- Flaunt Wine Company; United States: California: North Coast: Sonoma County
- Fleming Jenkins Vineyards & Winery (no longer in business); United States: California
- Fleury Estate Winery; United States: California: North Coast: Napa County: Rutherford
- Flint Knoll Winery; United States: California: North Coast: Napa County: Napa Valley
- Flora Springs Winery; United States: California: North Coast: Napa County: Napa Valley
- Flowers Vineyard & Winery; United States: California: North Coast: Sonoma County: Sonoma Coast
- Flying Goat Cellars; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Fog Crest Vineyard; United States: California: North Coast: Sonoma County: Russian River Valley
- Fog Hill Winery; United States: California
- Foggy Bridge Winery; United States: California
- Folded Hills; United States: California: Central Coast
- Foley Estate Vineyard & Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Foley Johnson; United States: California: North Coast: Napa County: Napa Valley
- Folie a Deux Winery; United States: California: North Coast: Napa County: Napa Valley
- Folktale Winery & Vineyards; United States: California: Central Coast: Monterey County: Arroyo Seco
- Fontana di Vita Vineyards (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Fontanella Family Winery; United States: California: North Coast: Napa County: Mt. Veeder
- Fontes and Phillips; United States: California: Central Coast: Santa Barbara County
- Foppiano Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Force and Grace Wines; United States: California
- Forchini Vineyards & Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Foretell; United States: California: North Coast: Napa County: Spring Mountain District
- Forlorn Hope Wines; United States: California: North Coast: Napa County: Napa Valley
- Forman Vineyards; United States: California: North Coast: Napa County: St. Helena
- Fort Ross Vineyard & Winery; United States: California: North Coast: Sonoma County: Sonoma Coast
- Forth Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Fortunate Son Wines; United States: California: North Coast: Napa County: St. Helena
- Fotinos Brothers Winery; United States: California: North Coast: Napa County: Napa Valley
- Fountainhead Cellars; United States: California: North Coast: Napa County: Napa Valley
- Four Vines Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Foursight Wines; United States: California: North Coast: Mendocino County: Anderson Valley
- Foxen; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Foyt Family Wines; United States: California
- Francis Ford Coppola Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Franciscan Oakville Estate; United States: California: North Coast: Napa County: Oakville
- Frank Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Fratelli Perata; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Frazier Winery; United States: California: North Coast: Napa County: Napa Valley
- Freeman Vineyard & Winery; United States: California: North Coast: Sonoma County
- Freemark Abbey Winery; United States: California: North Coast: Napa County: Napa Valley
- Freestone; United States: California: North Coast: Napa County: Napa Valley
- Freestone Vineyards; United States: California: North Coast: Sonoma County
- Frei Brothers; United States: California: North Coast: Sonoma County: Russian River Valley
- Frey Vineyards; United States: California: North Coast: Mendocino County: Redwood Valley
- Frias Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Frick Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Frisson Wines; United States: California: North Coast: Napa County: Napa Valley
- Fritz Underground Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Frog's Leap Winery; United States: California: North Coast: Napa County: Rutherford
- Fulcrum Wines; United States: California: North Coast: Sonoma County: Sonoma Valley
- Fuse Wine; United States: California: North Coast: Napa County: Napa Valley
- Futo; United States: California: North Coast: Napa County: Oakville
- Gabrielli Winery; United States: California: North Coast: Mendocino County: Redwood Valley
- Gainey Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Galante Vineyards; United States: California: Central Coast: Monterey County: Carmel Valley
- Galerie Wines; United States: California: North Coast: Napa County: Napa Valley
- Galleron Signature Wines; United States: California: North Coast: Napa County: Napa Valley
- Gallica; United States: California: North Coast: Napa County: Napa Valley
- Gallo of Sonoma Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Gamba Vineyards and Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Gamble Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Gandona Estate; United States: California: North Coast: Napa County: St. Helena
- Gann Family Cellars; United States: California: North Coast: Sonoma County: Russian River Valley
- Garden Creek Vineyards; United States: California: North Coast: Sonoma County: Alexander Valley
- Gargiulo Vineyards; United States: California: North Coast: Napa County: Oakville
- Garré Vineyard and Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Garretson Wine Company (no longer in business); United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Garric Cellars (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Gary Farrell; United States: California: North Coast: Sonoma County: Russian River Valley
- Gemella Wines; United States: California: North Coast: Napa County: Napa Valley
- Gemstone Vineyard; United States: California: North Coast: Napa County: Napa Valley
- GEN 7 Wines; United States: California
- Generations of Sonoma Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Gentleman Farmer Wines; United States: California: North Coast: Napa County: Napa Valley
- Geyser Peak Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Ghost Block Winery; United States: California: North Coast: Napa County: Napa Valley
- Ghost Horse World; United States: California: North Coast: Napa County: Napa Valley
- Gibbs Napa Valley; United States: California: North Coast: Napa County: Napa Valley
- Gioia Wine (no longer in business); United States: California: Central Coast: Santa Barbara County
- Giornata; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Girard Winery; United States: California: North Coast: Napa County: Napa Valley
- Girasole Vineyards; United States: California: North Coast: Mendocino County
- Givich Vineyards; United States: California
- GlenLyon Vineyards & Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Gloria Ferrer; United States: California: North Coast: Sonoma County: Sonoma Valley
- Gnarly Head; United States: California: Inland Valley: San Joaquin County: Lodi
- Gneiss Winery; United States: California: North Coast: Napa County: Napa Valley
- Gnekow Family Winery; United States: California
- Godspeed Vineyards; United States: California: North Coast: Napa County: Mt. Veeder
- Gold Hill Vineyard; United States: California: Sierra Foothills: El Dorado County
- Goldeneye; United States: California: North Coast: Mendocino County: Anderson Valley
- Goldschmidt Vineyards; United States: California: North Coast: Sonoma County
- Gondak Cellars; United States: California
- Goosecross Cellars; United States: California: North Coast: Napa County: Napa Valley
- Grable Vineyards; United States: California: North Coast: Sonoma County: Knights Valley
- Grace Family Vineyards; United States: California: North Coast: Napa County: St. Helena
- Graeser Winery; United States: California: North Coast: Napa County: Napa Valley
- Grand Napa Vineyards; United States: California: North Coast: Napa County: Rutherford
- Grassi; United States: California: North Coast: Napa County: Napa Valley
- Grasso Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Gratia; United States: California
- Graves Winegrowers; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Grayson Cellars; United States: California: North Coast: Napa County: Napa Valley
- Grebennikoff Vineyards; United States: California: North Coast: Sonoma County
- Green & Red Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Greenwood Ridge Vineyards; United States: California: North Coast: Mendocino County: Anderson Valley
- Gregory Graham; United States: California: North Coast: Lake County: Red Hills
- Grey Stack Cellars; United States: California: North Coast: Sonoma County: Bennett Valley
- Grey Wolf Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Grgich Hills Cellar; United States: California: North Coast: Napa County: Rutherford
- Gridley Family Cellars; United States: California: North Coast: Napa County: Napa Valley
- Grieve Family Winery; United States: California: North Coast: Napa County: Napa Valley
- Griot Cellars; United States: California: North Coast: Napa County: Napa Valley
- Groth Vineyards; United States: California: North Coast: Napa County: Oakville
- Grove Street Winery; United States: California: North Coast: Sonoma County
- Guarachi Family Wines; United States: California
- Guglielmo Winery; United States: California: Central Coast: Santa Clara County
- Guilliams Vineyards; United States: California: North Coast: Napa County: Spring Mountain District
- Gundlach Bundschu Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Gust Wines; United States: California: North Coast: Sonoma County
- Gustavo Winery; United States: California: North Coast: Napa County: Napa Valley
- Guthrie Family Wines; United States: California: North Coast: Sonoma County
- Gypsy Canyon; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Haarmeyer Wine Cellars; United States: California: Inland Valley: Sacramento County: Clarksburg
- Haber Family Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Hafner Vineyard; United States: California: North Coast: Sonoma County: Alexander Valley
- Hagafen Cellars; United States: California: North Coast: Napa County: Napa Valley
- Hagen Heights; United States: California: North Coast: Napa County: Napa Valley
- Halcon Estate; United States: California: North Coast: Mendocino County
- Haliotide; United States: California: Central Coast: San Luis Obispo County
- Hall Winery; United States: California: North Coast: Napa County: Napa Valley
- Halleck Vineyard; United States: California: North Coast: Sonoma County: Sonoma Coast
- Halter Ranch; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Hamel Wines; United States: California: North Coast: Sonoma County
- Hammerling Wines; United States: California
- Handley Cellars; United States: California: North Coast: Mendocino County: Anderson Valley
- Handwritten Wines; United States: California: North Coast: Napa County: Napa Valley
- Hanna Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Hans Fahden Winery; United States: California: North Coast: Napa County: Napa Valley
- Hanzell Vineyards; United States: California: North Coast: Sonoma County: Sonoma Valley
- Happy Mommy Wines; United States: California: Central Coast: Santa Barbara County
- Harbison Wines; United States: California: North Coast: Napa County: Oakville
- Harlan Estate; United States: California: North Coast: Napa County: Oakville
- Harmony Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Harney Lane; United States: California: Inland Valley: San Joaquin County: Lodi
- Harrington Wines; United States: California
- Harris Estate Vineyards; United States: California: North Coast: Napa County: Calistoga
- Harrison Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Hart Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Hartford Family Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Hartwell Estate Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Harumph; United States: California: North Coast: Napa County: Napa Valley
- Harvest Moon Estate & Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Harvey and Harriet; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Hatcher Winery; United States: California: Sierra Foothills
- Havens Wine Cellars (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Hawkes; United States: California: North Coast
- Hawley Wines; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Hayfork; United States: California: North Coast: Napa County: Napa Valley
- Haynes Vineyard; United States: California: North Coast: Napa County: Coombsville
- Haywood Winery; United States: California: North Coast: Sonoma County
- Head High Wines; United States: California: North Coast: Sonoma County
- Hearst Ranch Winery; United States: California: Central Coast
- Heibel Ranch Vineyards; United States: California: North Coast: Napa County: St. Helena
- Heimark Vineyard; United States: California: North Coast: Napa County: Calistoga
- Heir Apparent Winery; United States: California: North Coast: Napa County: Napa Valley
- Heitz Cellars; United States: California: North Coast: Napa County: St. Helena
- Helena View Johnson; United States: California: North Coast: Napa County: Napa Valley
- Hendry Winery; United States: California: North Coast: Napa County: Napa Valley
- Herb Lamb Vineyards (no longer in business); United States: California: North Coast: Napa County: St. Helena
- Herman Story Wines; United States: California: Central Coast: San Luis Obispo County
- Hermosillo Family Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Heron Wines; United States: California
- Hertelendy Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Hesperian Wines; United States: California: North Coast: Napa County: Napa Valley
- Hess Collection; United States: California: North Coast: Napa County: Napa Valley
- Hess Persson Estates; United States: California: North Coast: Napa County: Mt. Veeder
- Hestan Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Hibou; United States: California: North Coast: Sonoma County
- Hidden Ridge Vineyard; United States: California: North Coast: Sonoma County
- HighFlyer; United States: California: North Coast: Napa County: Napa Valley
- Highway 12 Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Hill Climber; United States: California: North Coast: Napa County: Napa Valley
- Hill Family Estate; United States: California: North Coast: Napa County: Napa Valley
- Hindsight Wines; United States: California: North Coast: Napa County: Napa Valley
- Hirsch Vineyards; United States: California: North Coast: Sonoma County
- Hobel Wines; United States: California: North Coast: Napa County: Napa Valley
- Holdredge Wines; United States: California: North Coast: Sonoma County
- Hollis Wines; United States: California: North Coast: Napa County: Napa Valley
- Holly's Hill Vineyards; United States: California: Sierra Foothills: El Dorado County
- Hollywood and Vine Cellars; United States: California: North Coast: Napa County: Napa Valley
- Holman Cellars; United States: California: North Coast: Napa County: Napa Valley
- Holman Ranch; United States: California: Central Coast: Monterey County: Carmel Valley
- Homefire Cellars; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Honig Vineyard and Winery; United States: California: North Coast: Napa County: Rutherford
- Honrama Cellars; United States: California: North Coast: Napa County: Napa Valley
- Hoopes Vineyard; United States: California: North Coast: Napa County: Oakville
- Hop Kiln Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Hope & Grace; United States: California: North Coast: Napa County: Napa Valley
- Hossfeld Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Hourglass Winery; United States: California: North Coast: Napa County: Napa Valley
- House Family Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Howell at the Moon; United States: California: North Coast: Napa County: Howell Mountain
- Howell Mountain Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Huber Cellars; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Hudson Ranch and Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Hug Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Hugo Family Cellars; United States: California: North Coast: Napa County: Napa Valley
- Hundred Acre Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Hunnicutt; United States: California: North Coast: Napa County: Napa Valley
- Hunter Hill Vineyard and Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Hunter III Wines; United States: California: North Coast: Napa County: Napa Valley
- Husch Vineyards; United States: California: North Coast: Mendocino County: Anderson Valley
- Husic Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Hyde de Villaine; United States: California: North Coast: Napa County: Napa Valley
- Hyde Estate Winery; United States: California: North Coast: Sonoma County: Carneros
- Icaria Creek Winery; United States: California: North Coast: Sonoma County
- Iconic Wines; United States: California
- Ideology Cellars; United States: California: North Coast: Napa County: Napa Valley
- Idlewild Wines; United States: California: North Coast: Mendocino County: Mendocino
- Igneous Wines; United States: California: North Coast: Napa County: Napa Valley
- Il Cuore Wines; United States: California: North Coast: Mendocino County
- Il Gioiello Winery / Morse Wines; United States: California: Sierra Foothills: Amador County
- Illumination; United States: California: North Coast: Napa County: Napa Valley
- Ilona Wines; United States: California: North Coast: Napa County: Howell Mountain
- Ilsley Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Imagery Winery; United States: California: North Coast: Sonoma County
- Immix; United States: California: North Coast: Napa County: Napa Valley
- Impensata; United States: California: North Coast: Napa County: Napa Valley
- Indian Springs Vineyards; United States: California: Sierra Foothills
- Indigenè Cellars; United States: California: Central Coast: Monterey County: Carmel Valley
- Inglenook; United States: California: North Coast: Napa County: Rutherford
- Inizi Wines; United States: California: North Coast
- Ink Grade; United States: California: North Coast: Napa County: Howell Mountain
- Inman Family Wines; United States: California: North Coast: Sonoma County: Russian River Valley
- Innovatus; United States: California: North Coast: Napa County: Napa Valley
- Inspiration Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Irish Vineyards; United States: California: Sierra Foothills
- Iron Horse Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Iron Hub Winery; United States: California: Sierra Foothills: Amador County: Shenandoah Valley
- Ironstone Vineyards; United States: California: Sierra Foothills
- Ispiri; United States: California: North Coast: Sonoma County
- Italics Wine; United States: California: North Coast: Napa County: Napa Valley
- J Dusi Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- J Gregory Wines; United States: California: North Coast: Napa County: Napa Valley
- J Vineyards & Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- J. Cage Cellars; United States: California: North Coast: Sonoma County
- J. Davies; United States: California: North Coast: Napa County: Napa Valley
- J. Lohr Vineyards & Wines; United States: California
- J. Moss Wines; United States: California: North Coast: Napa County: Napa Valley
- J. Wilkes; United States: California: Central Coast
- Jack Brooks Vineyard; United States: California: North Coast: Napa County: Calistoga
- Jack Creek Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Jack Larkin; United States: California: North Coast: Napa County: Napa Valley
- Jack William; United States: California: North Coast: Sonoma County: Alexander Valley
- Jaffe Estate; United States: California: North Coast: Napa County: Napa Valley
- Jaffurs Wine Cellars; United States: California: Central Coast: Santa Barbara County
- Jake's Fault; United States: California
- JaM Cellars; United States: California
- James Cole Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- James Creek Vineyards (no longer in business); United States: California: North Coast: Napa County: Pope Valley
- Jamie Slone Wines; United States: California: Central Coast: Santa Barbara County
- Jana Winery; United States: California: North Coast: Napa County: Napa Valley
- JanKris Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- JAQK Cellars; United States: California: North Coast: Napa County: Napa Valley
- Jarvis Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Jason-Stephens Winery; United States: California
- JAX Winery; United States: California: North Coast: Napa County: Napa Valley
- Jean Edwards Cellars; United States: California: North Coast: Napa County: Napa Valley
- Jeff Cohn Cellars; United States: California
- Jeff Runquist Wines; United States: California: Sierra Foothills: Amador County
- Jelly Jar Wine; United States: California: North Coast: Napa County: Napa Valley
- Jepson Vineyards and Winery; United States: California: North Coast: Mendocino County
- Jeremy Wine Company; United States: California: Inland Valley: San Joaquin County: Lodi
- Jericho Canyon Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Jeriko Estate; United States: California: North Coast: Mendocino County
- Jessie's Grove Winery; United States: California: Inland Valley: San Joaquin County: Lodi
- Jessup Cellars; United States: California: North Coast: Napa County: Mt. Veeder
- Jewel Collection Fine Wines; United States: California: Inland Valley: San Joaquin County: Lodi
- Joel Gott; United States: California
- John Anthony Vineyards; United States: California: North Coast: Napa County: Napa Valley
- John Christopher Cellars; United States: California: Central Coast: Alameda County: Livermore Valley
- John Tyler Wines; United States: California: North Coast: Sonoma County: Russian River Valley
- Johndrow Vineyards; United States: California
- Jolie-Laide Wines; United States: California: North Coast: Sonoma County
- Jon Nathaniel Wines; United States: California: North Coast: Napa County: Napa Valley
- Jonata; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Jones Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Jordan Vineyard & Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Jory Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Joseph Carr Wine; United States: California: North Coast: Napa County: Napa Valley
- Joseph Jewell Wines; United States: California: North Coast: Sonoma County
- Joseph Phelps Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Joseph Swan Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Josh Cellars; United States: California
- Joullian Vineyards ; United States: California: Central Coast: Monterey County: Carmel Valley
- Journeyman; United States: California: North Coast: Sonoma County: Sonoma Coast
- Joyce Vineyards; United States: California: Central Coast: Monterey County: Monterey
- JR Storey Winery; United States: California: North Coast: Sonoma County
- JR Wagner Family Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Judd's Hill; United States: California: North Coast: Napa County: Napa Valley
- Julien Fayard; United States: California: North Coast: Napa County: Napa Valley
- JuneRay Wines; United States: California: North Coast: Napa County: Napa Valley
- Juslyn Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Justice; United States: California: North Coast: Napa County: Napa Valley
- Justin Vineyards and Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Kachina Vineyards (no longer in business); United States: California: North Coast: Sonoma County: Dry Creek Valley
- KaDieM Cellars; United States: California: North Coast: Napa County: Rutherford
- Kale Wines; United States: California: North Coast: Napa County: Napa Valley
- Kalin Cellars; United States: California: Central Coast: Alameda County: San Francisco Bay
- Kamen Estate Wines; United States: California: North Coast: Sonoma County: Sonoma Valley
- Kanpai Wines; United States: California: North Coast: Napa County: Oak Knoll District
- Kanzler Vineyards; United States: California: North Coast: Sonoma County: Sonoma Coast
- Kapcsandy Family Winery; United States: California: North Coast: Napa County: Napa Valley
- Karl Lawrence Cellars; United States: California: North Coast: Napa County: Napa Valley
- Karly; United States: California: Sierra Foothills: Amador County
- Kata; United States: California: North Coast: Napa County: Napa Valley
- Kate's Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Kathryn Kennedy Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Kaz Vineyard & Winery; United States: California: North Coast: Lake County
- Kazmer & Blaise; United States: California: North Coast: Sonoma County: Carneros
- Keegan Cellars; United States: California: North Coast: Napa County: Napa Valley
- Keep Wines; United States: California
- Keever Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Kelham Vineyards; United States: California: North Coast: Napa County: Oakville
- Kelleher Family Vineyard; United States: California: North Coast: Napa County: Oakville
- Keller Estate; United States: California: North Coast: Sonoma County: Sonoma Coast
- Kelly Fleming Wines; United States: California: North Coast: Napa County: Napa Valley
- Kelly Magee; United States: California: North Coast: Napa County: Napa Valley
- Ken Brown Wines; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Kendall-Jackson Vineyards; United States: California: North Coast: Sonoma County
- Kenefick Ranch; United States: California: North Coast: Napa County: Calistoga
- Kent Rasmussen Winery; United States: California: North Coast: Napa County: Napa Valley
- Kenwood Vineyards; United States: California: North Coast: Sonoma County: Sonoma Valley
- Kenzo Estate; United States: California: North Coast: Napa County: Napa Valley
- Keplinger Wines; United States: California
- Kerr Cellars; United States: California: North Coast
- Kesner Wines; United States: California: North Coast: Napa County: Napa Valley
- Kessler-Haak Vineyard and Wines; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Ketcham Estate; United States: California: North Coast: Sonoma County: Russian River Valley
- Kiamie Wine Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Kieu Hoang Winery (no longer in business); United States: California: North Coast: Napa County: Los Carneros
- Kimmel Vineyards; United States: California: North Coast: Mendocino County
- Kind Cellars; United States: California: North Coast: Napa County: Napa Valley
- Kindred Wines; United States: California
- King Stag Wines; United States: California
- Kings Carey; United States: California: Central Coast: Santa Barbara County
- Kinsman Eades; United States: California: North Coast: Napa County: Napa Valley
- Kirigin Cellars; United States: California: Central Coast: Santa Clara County: Santa Clara Valley
- Kistler Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Kit Fox Vineyards; United States: California
- Kith & Kin; United States: California: North Coast: Napa County: Napa Valley
- Kitson Wines; United States: California: North Coast: Napa County: Napa Valley
- Kivelstadt Cellars; United States: California: North Coast: Sonoma County
- Knighton Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Knights Bridge Winery; United States: California: North Coast: Napa County: St. Helena
- Kobalt Wines; United States: California: North Coast: Napa County: Napa Valley
- Koehler Winery; United States: California: Central Coast: Santa Barbara County
- Kongsgaard; United States: California: North Coast: Napa County: Napa Valley
- Kosta Browne Winery; United States: California: North Coast: Sonoma County
- Kristian Story Wines; United States: California: North Coast: Napa County: Napa Valley
- KrisTodd Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Krupp Brothers Estates; United States: California: North Coast: Napa County: Napa Valley
- Krutz Family Cellars; United States: California: North Coast: Sonoma County
- Kuleto Estate Family Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Kunde Estate Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Kunin Wines; United States: California: Central Coast: Santa Barbara County
- Kutch; United States: California: North Coast: Sonoma County
- L’Angevin Wines; United States: California: North Coast: Napa County: Napa Valley
- L'Aventure; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- L’Envolee Wines; United States: California: North Coast: Napa County: Napa Valley
- La Chertosa Wines; United States: California: North Coast: Sonoma County
- La Crema; United States: California: North Coast: Sonoma County: Russian River Valley
- La Famiglia di Robert Mondavi (no longer in business); United States: California
- La Filice Winery; United States: California: Central Coast: San Luis Obispo County
- La Follette Wines; United States: California
- La Jota Vineyard; United States: California: North Coast: Napa County: Napa Valley
- La Lomita Wines; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- La Nebbia Winery; United States: California
- La Pelle; United States: California: North Coast: Napa County: Napa Valley
- La Prenda Wines; United States: California: North Coast: Sonoma County
- La Sirena; United States: California: North Coast: Napa County: Napa Valley
- La Vieille Montagne; United States: California: North Coast: Napa County: Napa Valley
- La Voix Winery; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Labry Wines; United States: California: North Coast: Napa County: Napa Valley
- Ladera Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Lady Luck Wines; United States: California: North Coast: Sonoma County
- Laetitia Vineyard and Winery; United States: California: Central Coast: San Luis Obispo County
- Lafond Winery and Vineyards; United States: California: Central Coast: Santa Barbara County
- Lagier Meredith Vineyard; United States: California: North Coast: Napa County: Mt. Veeder
- Lago di Merlo Vineyards and Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Lail Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Laine Estate Wines; United States: California: North Coast: Napa County: Napa Valley
- Laird Family Estate; United States: California: North Coast: Napa County: Napa Valley
- Lake Sonoma Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Lambert Bridge Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Lamborn Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Lancaster Estate; United States: California: North Coast: Sonoma County: Alexander Valley
- Land of Promise Wine; United States: California: North Coast: Sonoma County: Sonoma Coast
- Landmark Vineyards; United States: California: North Coast: Sonoma County: Sonoma Valley
- Lane Tanner Winery; United States: California: Central Coast: Santa Barbara County
- Lang & Reed Winery; United States: California: North Coast: Napa County: Rutherford
- LangeTwins Family Winery; United States: California
- Lanthanide Wines; United States: California
- Larkin Wines; United States: California: North Coast: Napa County: Napa Valley
- Larkmead Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Larson Family Winery; United States: California: North Coast: Sonoma County
- Las Jaras Wines; United States: California: North Coast: Sonoma County: Sonoma Mountain
- LaTour Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Laura Michael Wines; United States: California: North Coast: Napa County: Napa Valley
- Laurel Glen Vineyard; United States: California: North Coast: Sonoma County: Sonoma Mountain
- Lava Cap Winery; United States: California: Sierra Foothills: El Dorado County
- Lava Vine; United States: California: North Coast: Napa County: Napa Valley
- Law Estate Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Lawer Family Wines; United States: California: North Coast: Napa County: Napa Valley
- LaZarre Wines; United States: California: Central Coast
- Lazy Creek Vineyards; United States: California: North Coast: Mendocino County: Anderson Valley
- Le Cuvier; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Le Mulet Rouge; United States: California: Sierra Foothills: Amador County
- Le Vigne Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Leaf And Vine; United States: California: North Coast
- Leal Estate Vineyards; United States: California: Central Coast: San Benito County: San Benito
- Ledgewood Creek Winery; United States: California: North Coast: Solano County: Suisun Valley
- Ledson Winery; United States: California: North Coast: Sonoma County
- Leducq Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Lee Family Farm; United States: California: Central Coast: Monterey County
- Legacy; United States: California: North Coast: Sonoma County: Alexander Valley
- Lemus Family Wines; United States: California: North Coast: Sonoma County
- Leonardo Family Vineyards; United States: California: Inland Valley: San Joaquin County: Lodi
- Leoness Cellars; United States: California: Southern California: Riverside County: Temecula Valley
- Lerner Project; United States: California: North Coast: Napa County: Napa Valley
- Les Vins Julien; United States: California
- Leto Cellars; United States: California: North Coast: Napa County: Napa Valley
- Levendi Estates Winery; United States: California: North Coast: Napa County: Napa Valley
- Levensohn Vineyards (no longer in business); United States: California: North Coast: Napa County: St. Helena
- Leviathan; United States: California: North Coast: Napa County: Oakville
- Levo Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Levy McCellan; United States: California: North Coast: Napa County: St. Helena
- Lewelling Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Lewis Cellars; United States: California: North Coast: Napa County: Oakville
- Liberty School Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Lichen Estate; United States: California: North Coast: Mendocino County: Anderson Valley
- Lieu Dit; United States: California: Central Coast: Santa Barbara County
- Lightning Wines; United States: California
- Limerick Lane Cellars; United States: California: North Coast: Sonoma County: Russian River Valley
- LinCourt Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Lindstrom Wines; United States: California: North Coast: Napa County: Stags Leap District
- Lineage Wine; United States: California: Central Coast: Alameda County: Livermore Valley
- Linne Calodo Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Lioco; United States: California: North Coast: Mendocino County: Anderson Valley
- Lion's Run; United States: California: North Coast: Napa County: Napa Valley
- Lionheart Wines; United States: California
- Liparita Cellars; United States: California: North Coast: Napa County: Howell Mountain
- Liquid Farm; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Lithology Wine; United States: California: North Coast: Napa County: Napa Valley
- Littorai Wines; United States: California: North Coast: Sonoma County
- Livermore Valley Cellars; United States: California: Central Coast: Alameda County: Livermore Valley
- Livingston-Moffett Winery; United States: California: North Coast: Napa County: Napa Valley
- Lloyd Cellars; United States: California: North Coast: Napa County: Napa Valley
- Lobo Wines; United States: California: North Coast: Napa County: Atlas Peak
- Lokoya Winery; United States: California: North Coast: Napa County: Oakville
- Lola Wines; United States: California
- Lolonis Winery; United States: California: North Coast: Mendocino County: Redwood Valley
- Loma Prieta Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Londer Vineyards; United States: California: North Coast: Mendocino County
- Lonetree Winery; United States: California: North Coast: Mendocino County
- Long Meadow Ranch; United States: California: North Coast: Napa County: Napa Valley
- Long Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Longboard Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Longevity Wines; United States: California: Central Coast: Alameda County: Livermore Valley
- Longfellow Wines; United States: California
- Longoria Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Longtable; United States: California: North Coast: Napa County: Mt. Veeder
- Loomis Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Loos Family Winery (no longer in business); United States: California: North Coast: Sonoma County: Russian River Valley
- Lorca Wines (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Lorenza; United States: California
- Lorenza-Lake Winery; United States: California: North Coast: Napa County: Napa Valley
- Loring Wine Company; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Lost Canyon Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Lost Sierra Wine Co; United States: California
- Loxton Cellars; United States: California: North Coast: Sonoma County: Sonoma Valley
- Lucas & Lewellen Vineyards; United States: California: Central Coast: Santa Barbara County
- Lucia Vineyards & Winery; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Lula Cellars; United States: California: North Coast: Mendocino County
- Lumen Wines; United States: California: Central Coast: Santa Barbara County
- Lumia; United States: California: North Coast
- Luna Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Luscher-Ballard; United States: California: North Coast: Napa County: Spring Mountain District
- Lusu Cellars; United States: California
- Lutum Wines; United States: California
- LXV Wine; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Lynch Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Lynmar Estate; United States: California: North Coast: Sonoma County: Russian River Valley
- Maboroshi Wine Estates; United States: California: North Coast: Sonoma County: Russian River Valley
- Mac and Billy Cellars; United States: California: Central Coast
- Macauley Vineyard; United States: California: North Coast: Napa County: Napa Valley
- MacDonald Vineyards; United States: California: North Coast: Napa County: Oakville
- Maclaren Wine; United States: California: North Coast: Sonoma County: Sonoma Valley
- MacLean Wines (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- MacRostie Winery; United States: California: North Coast: Sonoma County
- Madison Chase Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Madonna Estates Mont St. John; United States: California: North Coast: Napa County: Napa Valley
- Madorom; United States: California: North Coast: Napa County: Napa Valley
- Madrigal Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Madrona Vineyards; United States: California: Sierra Foothills: El Dorado County
- Maggy Hawk Vineyard; United States: California: North Coast: Mendocino County: Anderson Valley
- Magna Carta Cellars; United States: California: North Coast: Napa County: Napa Valley
- Mahoney Vineyards; United States: California: North Coast: Sonoma County: Carneros
- Mail Road Wines; United States: California: Central Coast: Santa Barbara County
- Maison d'Amis; United States: California: North Coast: Napa County
- Maison Fayard; United States: California: North Coast: Napa County: Napa Valley
- Maitre De Chai; United States: California: Inland Valley: San Joaquin County: Lodi
- Majuscule Wine; United States: California: North Coast: Napa County: Napa Valley
- Malene Wines; United States: California: Central Coast: San Luis Obispo County
- Malibu Family Wines; United States: California
- Malk Family Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Maloy O'Neill Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Manross Wines; United States: California
- Mansfield-Dunne; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Manzanita Canyon; United States: California
- Maple Creek Winery; United States: California: North Coast: Mendocino County: Anderson Valley
- MARA Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Marcassin; United States: California: North Coast: Napa County: Napa Valley
- Marchelle Wines; United States: California: North Coast: Sonoma County
- Marciano Estate; United States: California: North Coast: Napa County: St. Helena
- Margerum Wine Company; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Marietta Cellars; United States: California: North Coast: Sonoma County: Alexander Valley
- Marilyn Wines; United States: California: North Coast: Napa County: Napa Valley
- Marimar Estate Vineyards and Winery; United States: California: North Coast: Solano County: Green Valley
- Mario Bazan Cellars; United States: California: North Coast: Napa County: Napa Valley
- Mario Perelli-Minetti; United States: California: North Coast: Napa County: Rutherford
- Maritana Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Mark David Winery (no longer in business); United States: California: North Coast: Sonoma County
- Mark Herold Wines; United States: California: North Coast: Napa County: Napa Valley
- Markham Vineyards; United States: California: North Coast: Napa County: St. Helena
- Maroon Wines; United States: California: North Coast: Napa County: Napa Valley
- Marr Cellars; United States: California
- Marston Family Vineyard; United States: California: North Coast: Napa County: Spring Mountain District
- Martha Stoumen Wines; United States: California
- Martin & Weyrich Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Martin Estate; United States: California: North Coast: Napa County: Rutherford
- Martin Family Vineyards; United States: California: North Coast: Sonoma County
- Martin Ray Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Martinelli Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Massican; United States: California: North Coast: Napa County: Napa Valley
- Matanzas Creek Winery; United States: California: North Coast: Sonoma County: Sonoma Mountain
- Match Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Materra Wines; United States: California: North Coast: Napa County: St. Helena
- Mathis; United States: California: North Coast: Sonoma County: Sonoma Valley
- Matt Morris; United States: California: North Coast: Napa County: Napa Valley
- Matthew Wallace Wines; United States: California: North Coast: Napa County: Rutherford
- Matthiasson; United States: California: North Coast: Napa County: Napa Valley
- Mauritson Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Mayacamas Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Maybach Family Vineyards; United States: California: North Coast: Napa County: Oakville
- Mazzocco Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- McCarter Cellars; United States: California: North Coast: Sonoma County
- McClain Family Cellars; United States: California: Central Coast: Santa Barbara County
- McCray Ridge; United States: California: North Coast: Sonoma County: Dry Creek Valley
- McDowell Valley Vineyards (no longer in business); United States: California: North Coast: Mendocino County
- McGrail Vineyards and Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- McHenry Vineyard; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- McIntyre Vineyards; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- McKahn Family Cellars; United States: California
- McKeon-Phillips Winery; United States: California: Central Coast: Santa Barbara County
- McManis Family Vineyards; United States: California: Inland Valley
- McNab Ridge; United States: California: North Coast: Mendocino County
- McPrice Myers; United States: California: Central Coast
- MCV Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Meadowcroft; United States: California: North Coast: Sonoma County
- Meander Wines; United States: California: North Coast: Napa County: Calistoga
- Medlock Ames; United States: California: North Coast: Sonoma County: Alexander Valley
- Meeker Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Mela; United States: California: North Coast: Napa County: Napa Valley
- Melanson Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Melka Wines; United States: California: North Coast: Napa County: Napa Valley
- Mellowood Vineyard; United States: California: Sierra Foothills: El Dorado County
- Melville Vineyards and Winery; United States: California: Central Coast: Santa Barbara County
- Memento Mori; United States: California: North Coast: Napa County: Napa Valley
- Mendelson Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Mending Wall; United States: California: North Coast: Napa County: Napa Valley
- Mendocino Hill Winery; United States: California: North Coast: Mendocino County
- Mer Soleil Winery; United States: California: Central Coast: Monterey County
- Mercy Vineyards; United States: California: Central Coast: Monterey County: Arroyo Seco
- Merriam Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Merry Edwards Wines; United States: California: North Coast: Sonoma County
- Merryvale Vineyards; United States: California: North Coast: Napa County: St. Helena
- Merus Wines; United States: California: North Coast: Napa County: Napa Valley
- Metaphora Wines; United States: California: North Coast: Napa County: Napa Valley
- Meteor Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Mettler Family Cellars; United States: California: Inland Valley: San Joaquin County: Lodi
- Mi Sueno Wine Cellar; United States: California: North Coast: Sonoma County: Carneros
- Mia Carta; United States: California: North Coast: Napa County: Napa Valley
- Michael~David Vineyards; United States: California: Inland Valley: San Joaquin County: Lodi
- Michael Grace Wines; United States: California: Central Coast: Santa Barbara County
- Michael Martella Wine; United States: California
- Michael Mondavi Family Estate; United States: California: North Coast: Napa County: Napa Valley
- Michael-Scott Wines; United States: California: North Coast: Napa County: Napa Valley
- Michaud Vineyard; United States: California: Central Coast: Monterey County: Chalone
- Michel-Schlumberger Benchland Wine Estate; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Middle Sister Wines; United States: California: North Coast: Napa County: Napa Valley
- Midnight Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Midsummer Cellars; United States: California: North Coast: Napa County: Rutherford
- Mietz Cellars; United States: California: North Coast: Sonoma County: Russian River Valley
- Milano Family Winery (no longer in business); United States: California: North Coast: Mendocino County
- Milat Vineyards; United States: California: North Coast: Napa County: St. Helena
- Milk Wines; United States: California: North Coast: Napa County: Napa Valley
- Mill Creek Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Miller Wine Works; United States: California: North Coast: Napa County: Napa Valley
- Milliaire Winery; United States: California: Sierra Foothills
- Miner Family Vineyards; United States: California: North Coast: Napa County: Oakville
- Mira Winery; United States: California: North Coast: Napa County: Napa Valley
- Mirror Wine Co; United States: California: North Coast: Napa County: Napa Valley
- Mitchell Katz Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Miura Vineyards; United States: California: North Coast: Napa County: Napa Valley
- MJA Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Modus Operandi Cellars; United States: California: North Coast: Napa County: Napa Valley
- Moffett Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Mojon's Bench; United States: California: North Coast: Sonoma County: Alexander Valley
- Monroy Wines; United States: California: North Coast: Sonoma County
- Montagna Vineyards (no longer in business); United States: California: North Coast: Napa County: St. Helena
- Montagne Russe; United States: California: North Coast: Sonoma County: Sonoma Coast
- Monterra Winery; United States: California: Central Coast: Monterey County
- Montevina Winery; United States: California: Sierra Foothills
- Monticello Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Moondance Cellars; United States: California: North Coast: Sonoma County: Sonoma Valley
- Moone One Thousand Vines; United States: California: North Coast: Napa County: Napa Valley
- Moone-Tsai; United States: California: North Coast: Napa County: Howell Mountain
- Moraga Vineyards; United States: California
- Moret-Brealynn Wines; United States: California
- Morey Cellars; United States: California: North Coast: Napa County: Napa Valley
- Morgan Winery; United States: California: Central Coast: Monterey County
- Morisoli Vineyard; United States: California: North Coast: Napa County: Rutherford
- Morlet Family Vineyards; United States: California: North Coast: Napa County: St. Helena
- Morning Dew Ranch; United States: California: North Coast: Mendocino County: Anderson Valley
- Morovino; United States: California: Central Coast: Santa Barbara County
- Morrison Family Winery; United States: California
- Mosaic Vineyards; United States: California: North Coast: Sonoma County: Alexander Valley
- Mosby Winery (no longer in business); United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Moshin Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Mount Aukum Winery; United States: California: Sierra Foothills: El Dorado County
- Mount Eden Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Mount Palomar Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Mount Saint Joseph Wines; United States: California
- Mount St. Helena Brand; United States: California: North Coast: Napa County: St. Helena
- Mount Tamalpais Vineyards; United States: California: Central Coast: Alameda County: San Francisco Bay
- Mount Veeder Winery; United States: California: North Coast: Napa County: Mt. Veeder
- Mt. Brave Wines; United States: California: North Coast: Napa County: Napa Valley
- Mueller Winery; United States: California: North Coast: Sonoma County
- Muir-Hanna Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Mumm Napa Valley; United States: California: North Coast: Napa County: Rutherford
- Muns Vineyard; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Murphy Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Murphy-Goode Estate Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Murrieta's Well; United States: California: North Coast: Sonoma County: Alexander Valley
- Muscardini Cellars; United States: California: North Coast: Sonoma County: Sonoma Valley
- Mushal Winery & Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Mutt Lynch Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- My Favorite Neighbor; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Myriad Cellars; United States: California: North Coast: Napa County: St. Helena
- Nadeau Family Vintners; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Naggiar Vineyards & Winery; United States: California: Sierra Foothills
- Nalle Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Napa Cellars; United States: California: North Coast: Napa County: Oakville
- Napa Wine Company; United States: California: North Coast: Napa County: Oakville
- Navarro Vineyards; United States: California: North Coast: Mendocino County: Anderson Valley
- Neal Family Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Neiman Cellars; United States: California: North Coast: Napa County: Napa Valley
- Nellcote; United States: California: North Coast: Napa County: Napa Valley
- Nemerever Vineyards; United States: California: North Coast: Napa County: Oakville
- Neotempo; United States: California: North Coast: Napa County: Napa Valley
- Nerelli Winery; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Nevada City Winery; United States: California: Sierra Foothills
- New Clairvaux Vineyard; United States: California
- Newfound Wines; United States: California: Sierra Foothills
- Newton Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Next Door; United States: California: North Coast: Napa County: Calistoga
- Neyers Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Nichelini Winery; United States: California: North Coast: Napa County: Napa Valley
- Nichols Winery & Cellars; United States: California: Central Coast: San Luis Obispo County
- Nicholson Jones; United States: California: North Coast: Napa County: Napa Valley
- Nicholson Ranch; United States: California: North Coast: Sonoma County
- Nickel & Nickel; United States: California: North Coast: Napa County: Napa Valley
- Nicora Wine; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Nid Tisse; United States: California: North Coast: Napa County: Napa Valley
- Nine North Wines; United States: California: North Coast: Napa County: Napa Valley
- Nine Suns Winery; United States: California: North Coast: Napa County: Napa Valley
- Niner Wine Estates; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- No Love Lost; United States: California
- Noble Family Wines; United States: California: North Coast: Napa County: Napa Valley
- Noria Wines; United States: California: North Coast
- Norman Vineyards (no longer in business); United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Notre Vin; United States: California: North Coast: Napa County: Napa Valley
- Novella Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Novy Cellars; United States: California: North Coast: Sonoma County
- O'Brien Family Vineyard; United States: California: North Coast: Napa County: Napa Valley
- O'Shaughnessy Estate Winery; United States: California: North Coast: Napa County: Howell Mountain
- Oak Cliff Cellars; United States: California: North Coast: Napa County: Napa Valley
- Oak Farm Vineyards; United States: California: Inland Valley: San Joaquin County: Lodi
- Oak Mountain Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Oakford Vineyards (no longer in business); United States: California: North Coast: Napa County: Oakville
- Oakstone Winery; United States: California: Sierra Foothills: El Dorado County
- Oakville East; United States: California: North Coast: Napa County: Oakville
- Oakville Ranch; United States: California: North Coast: Napa County: Oakville
- Obester Winery; United States: California
- Obscurity Cellars; United States: California: Sierra Foothills: El Dorado County: Fair Play
- Obsidian Ridge; United States: California: North Coast: Lake County
- Occidental; United States: California: North Coast: Sonoma County: Sonoma Coast
- Odette Estate; United States: California: North Coast: Napa County: Stags Leap District
- Oestermann Family Wines; United States: California: North Coast: Napa County: Napa Valley
- Ogden Wine Co; United States: California: North Coast: Napa County: Napa Valley
- Ojai Vineyard; United States: California: Central Coast
- Okapi; United States: California: North Coast: Napa County: Napa Valley
- Olabisi Winery; United States: California: North Coast: Napa County: Napa Valley
- Old Creek Ranch; United States: California: Central Coast
- Olette Vineyards and Winery; United States: California
- Oliver Curtis; United States: California: Central Coast: Monterey County
- Olivia Brion; United States: California: North Coast: Napa County: Wild Horse Valley
- Olof Cellars; United States: California: North Coast: Lake County
- Olson Ogden Wines (no longer in business); United States: California: North Coast: Sonoma County
- On Q Wines; United States: California: North Coast: Napa County: Napa Valley
- OnThEdge Winery; United States: California: North Coast: Napa County: Napa Valley
- ONX Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Ophir Wines; United States: California: Sierra Foothills
- Opolo Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Optima Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Opus One; United States: California: North Coast: Napa County: Oakville
- Orbis Winery; United States: California: North Coast: Sonoma County: Carneros
- Orchid Hill Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Orfila Vineyards; United States: California
- Orin Swift Cellars; United States: California: North Coast: Napa County: Napa Valley
- Orison Wines; United States: California: North Coast: Napa County: Napa Valley
- Ortman Family Vineyards; United States: California: Central Coast: San Luis Obispo County
- Osa Major Wines; United States: California: North Coast
- Ostreon Cellars; United States: California: North Coast: Napa County: Napa Valley
- Outpost Estate Wines; United States: California: North Coast: Napa County: Napa Valley
- Ovene Winery; United States: California: Central Coast: Santa Barbara County
- Ovid Wine; United States: California: North Coast: Napa County: Oakville
- Padis Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Page Mill Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Page Wine Cellars; United States: California: North Coast: Napa County: Napa Valley
- Pahlmeyer; United States: California: North Coast: Napa County: Napa Valley
- Palazzo Wine; United States: California: North Coast: Napa County: Napa Valley
- Pali Wine Company; United States: California
- Palmaz Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Palmeri Wines; United States: California: North Coast: Sonoma County: Alexander Valley
- Palmina; United States: California: Central Coast: Santa Barbara County
- Paloma Vineyard; United States: California: North Coast: Napa County: Spring Mountain District
- Pandemonium Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Pangloss Cellars (Formerly Audelssa Estate Winery); United States: California: North Coast: Sonoma County: Sonoma Valley
- Panther Rock; United States: California
- Paoletti Estates Winery; United States: California: North Coast: Napa County: Napa Valley
- Papapietro Perry Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Paradigm Winery; United States: California: North Coast: Napa County: Oakville
- Paradise Ridge Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Parador Cellars; United States: California: North Coast: Napa County: Napa Valley
- Paraduxx; United States: California: North Coast: Napa County: Napa Valley
- Paraiso Vineyards; United States: California: Central Coast: Monterey County
- Parallel Wines; United States: California: North Coast: Napa County: Napa Valley
- Paravel Wines; United States: California: North Coast: Napa County: Howell Mountain
- Paris Valley Road Estate Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Parrish Family Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Parry Cellars (no longer in business); United States: California: North Coast: Napa County: St. Helena
- Parsonage Family Winery; United States: California: Central Coast: Monterey County: Carmel Valley
- Passaggio Wines; United States: California
- Passalacqua Winery; United States: California: North Coast: Sonoma County
- Patel Winery; United States: California: North Coast: Napa County: Napa Valley
- Patent Wines; United States: California: North Coast: Napa County: St. Helena
- Patland Estate Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Patria; United States: California: North Coast: Napa County: Napa Valley
- Patrimony Estate; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Patz & Hall Wine Company; United States: California: North Coast: Napa County: Napa Valley
- Paul Hobbs Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Paul Lato Wines; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Paul Mathew Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Paula Kornell Sparkling Wine; United States: California
- Pavi Wines; United States: California: North Coast: Napa County: Napa Valley
- Pavilion Crossing; United States: California: North Coast: Napa County: Napa Valley
- Pavona Wines (no longer in business); United States: California: Central Coast: Monterey County
- Pax Wine Cellars; United States: California: North Coast: Sonoma County
- Paydirt; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Peachy Canyon Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Peake Ranch; United States: California: Central Coast: Santa Barbara County
- Peay Vineyards; United States: California: North Coast: Sonoma County: Sonoma Coast
- Pech Merle; United States: California: North Coast: Sonoma County
- Pedemonte Cellars; United States: California: North Coast: Napa County: Rutherford
- Pedras (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Pedroncelli Winery & Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Peirson Meyer; United States: California: North Coast: Napa County: Napa Valley
- Peju Province Winery; United States: California: North Coast: Napa County: Rutherford
- Pelerin Wines; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Pelican Ranch Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Pellet Estate; United States: California: North Coast: Napa County: St. Helena
- Pelletiere Estate Vineyard and Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Penche Wine; United States: California: North Coast: Napa County: Napa Valley
- Pendleton Estate (no longer in business); United States: California: North Coast: Sonoma County: Alexander Valley
- Penman Springs Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Pennyroyal Farm; United States: California: North Coast: Mendocino County: Anderson Valley
- Pepin Vineyard; United States: California: North Coast: Napa County: Rutherford
- Per Sempre; United States: California
- Perbacco Cellars; United States: California: Central Coast: San Luis Obispo County
- Perchance Estates; United States: California: North Coast: Napa County: Napa Valley
- Perlegos Family Wine; United States: California
- Perliss Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Perry Creek Vineyards; United States: California: Sierra Foothills: El Dorado County
- PerUs; United States: California: North Coast: Napa County: Yountville
- Pessagno Winery; United States: California
- Pestoni Family Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- Peter Cellars; United States: California: North Coast: Sonoma County
- Peter Franus; United States: California: North Coast: Napa County: Napa Valley
- Peter Michael Winery; United States: California: North Coast: Sonoma County: Knights Valley
- Peter Paul Wines; United States: California
- Peters Family Winery; United States: California
- Peterson Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Petree Cellars; United States: California
- Pey-Lucia Vineyards (No longer producing); United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Pey-Marin Vineyards; United States: California: Central Coast: Alameda County: San Francisco Bay
- Pezzi King; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Pfendler Vineyards; United States: California: North Coast: Sonoma County: Sonoma Coast
- Pharaoh Moans; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Phelan Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Phifer Pavitt; United States: California: North Coast: Napa County: Napa Valley
- Philip Staley Vineyards and Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Philip Togni Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Phoenix Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Pietra Santa Vineyards & Winery; United States: California: Central Coast: Monterey County
- Pilcrow; United States: California: North Coast: Napa County: Napa Valley
- Pillar Rock; United States: California: North Coast: Napa County: Stags Leap District
- Piña Cellars; United States: California: North Coast: Napa County: Napa Valley
- Pine Ridge Winery; United States: California: North Coast: Napa County: Stags Leap District
- Pisoni Vineyards and Winery; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Piziali Wines; United States: California: North Coast: Napa County: Napa Valley
- Plam Vineyards & Winery; United States: California: North Coast: Napa County: Napa Valley
- Plinth; United States: California: North Coast: Napa County: Napa Valley
- PlumpJack Winery; United States: California: North Coast: Napa County: Napa Valley
- Poalillo Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Poe Wines; United States: California
- Poem Cellars (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Poetic Cellars; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Point Concepción Wines; United States: California: Central Coast
- Pont Neuf Wine; United States: California: North Coast: Sonoma County
- Portalupi Wine Co.; United States: California: North Coast: Sonoma County: Russian River Valley
- Porter Creek Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Porter Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Porter-Bass; United States: California: North Coast: Sonoma County: Russian River Valley
- Pott Wines; United States: California: North Coast: Napa County: Napa Valley
- Prager Winery and Port Works; United States: California: North Coast: Napa County: St. Helena
- Praxis Cellars; United States: California
- Presidio Vineyard & Winery; United States: California: Central Coast: Santa Barbara County
- Presqu'ile Winery; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Preston Farm and Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Pride Mountain Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Priest Ranch; United States: California: North Coast: Napa County: Napa Valley
- Prime Cellars; United States: California: North Coast: Napa County: Napa Valley
- Progeny Winery; United States: California: North Coast: Napa County: Mt. Veeder
- Promise Wine; United States: California: North Coast: Napa County: Rutherford
- Promontory; United States: California: North Coast: Napa County: Napa Valley
- Provenance Vineyards; United States: California: North Coast: Napa County: Rutherford
- Provisor Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Puccioni Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Pulchella Winery; United States: California
- Pulido-Walker; United States: California: North Coast: Napa County: Napa Valley
- Punk Dog Wines; United States: California
- Puppione Family Wines; United States: California
- PureCru Wines; United States: California: North Coast: Napa County: Napa Valley
- Purlieu Wines; United States: California: North Coast: Napa County: Coombsville
- Pursuit Wine; United States: California: North Coast: Napa County: Napa Valley
- Pushback Wines; United States: California: North Coast: Napa County: Napa Valley
- Quigley Family Wines; United States: California
- Quill; United States: California: North Coast: Napa County: Napa Valley
- Quilt Napa Valley; United States: California: North Coast: Napa County: Napa Valley
- Quinta Madera Wines; United States: California: Inland Valley
- Quintessa; United States: California: North Coast: Napa County: Rutherford
- Quivet Cellars; United States: California: North Coast: Napa County: Spring Mountain District
- Quivira Estate Vineyards & Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Quixote Winery; United States: California: North Coast: Napa County: Stags Leap District
- Qupé Wine Cellars; United States: California: Central Coast: Santa Barbara County
- R. A. Harrison Family Cellars; United States: California: North Coast: Napa County: Napa Valley
- R. Merlo Estate Vineyards; United States: California
- R&B Cellars; United States: California
- R2 Wine Company; United States: California
- Rabbit Ridge Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Rabble Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Racchus Wines; United States: California: North Coast: Sonoma County
- Radio-Coteau Wine Cellars; United States: California: North Coast: Sonoma County
- Radog; United States: California: Central Coast: Monterey County
- Raeburn Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Raen; United States: California: North Coast: Sonoma County: Sonoma Coast
- Rail 2 Rail; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Ram's Gate Vineyards; United States: California: North Coast: Sonoma County: Carneros
- Ramey Wine Cellars; United States: California
- Ramian Estate; United States: California: North Coast: Napa County: Napa Valley
- Rancho Arroyo Grande Winery & Vineyards; United States: California: Central Coast: San Luis Obispo County: Arroyo Grande Valley
- Rancho San Miguel Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Rancho Zabaco; United States: California: North Coast: Sonoma County
- Ranchos de Ontiveros; United States: California: Central Coast: Santa Barbara County: Santa Maria Valley
- Rapport Wines; United States: California: North Coast: Napa County: Napa Valley
- Rarecat Wines; United States: California: North Coast
- Ravenswood Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Raymond; United States: California: North Coast: Napa County: St. Helena
- Raymond Burr Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- RD Winery; United States: California: North Coast: Napa County: Napa Valley
- RDLR Wine; United States: California: North Coast: Mendocino County
- Realm Cellars; United States: California: North Coast: Napa County: Napa Valley
- Red Bear Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Red Cap Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Red Car Wine; United States: California: North Coast: Sonoma County: Sonoma Coast
- Red Mare Wines; United States: California: North Coast: Napa County: Oakville
- Red Soles Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Red Thread Wine Company; United States: California: North Coast: Napa County: Howell Mountain
- Redmon Family Vineyards; United States: California: North Coast: Napa County: St. Helena
- Reeve Wines; United States: California: North Coast: Mendocino County: Anderson Valley
- Regusci Winery; United States: California: North Coast: Napa County: Napa Valley
- Relic; United States: California: North Coast: Napa County: St. Helena
- Renaissance Vineyard & Winery; United States: California: Sierra Foothills
- Renard; United States: California
- Renteria Wines; United States: California: North Coast: Napa County: Napa Valley
- Renwood Winery; United States: California: Sierra Foothills: Amador County
- Retro Cellars; United States: California: North Coast: Napa County: Napa Valley
- Retzlaff Vineyards; United States: California: Central Coast: Alameda County: Livermore Valley
- Revana; United States: California: North Coast: Napa County: Napa Valley
- Revenant Winery; United States: California: North Coast: Napa County: Napa Valley
- Reverie on Diamond Mtn; United States: California: North Coast: Napa County: Napa Valley
- Reynolds Family Winery; United States: California: North Coast: Napa County: Napa Valley
- Rhys Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Richard Partridge Wines; United States: California: North Coast: Napa County: Napa Valley
- Richard Perry Wines; United States: California: North Coast: Napa County: Napa Valley
- Richardson Vineyards; United States: California: North Coast: Sonoma County
- Rideau Vineyard; United States: California: Central Coast: Santa Barbara County
- Ridge Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Riggers Loft Wine Company; United States: California
- Rio Seco Vineyard and Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Ritchie Creek Vineyard; United States: California: North Coast: Napa County: Spring Mountain District
- River Run Vintners; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- River Wild Winery; United States: California: Central Coast
- Rivers-Marie; United States: California: North Coast: Sonoma County: Sonoma Coast
- Road 31 Wine Co.; United States: California: North Coast: Napa County: Napa Valley
- Roadhouse Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- ROAR Wines; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Robbins Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Robert Biale Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Robert Craig Winery; United States: California: North Coast: Napa County: Napa Valley
- Robert Foley Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Robert Green Cellars; United States: California: North Coast: Napa County: Napa Valley
- Robert Hall Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Robert Hunter Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Robert Keenan Winery; United States: California: North Coast: Napa County: Napa Valley
- Robert Mondavi Winery; United States: California: North Coast: Napa County: Napa Valley
- Robert Nenow Winery; United States: California: North Coast: Napa County: Napa Valley
- Robert Pecota Winery (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Robert Rue Vineyard; United States: California: North Coast: Sonoma County: Russian River Valley
- Robert Sinskey Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Robert Stemmler Winery; United States: California: North Coast: Sonoma County
- Robert Talbott Vineyards; United States: California: Central Coast: Monterey County: Carmel Valley
- Robert Young Estate Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Roberts + Rogers; United States: California: North Coast: Napa County: Howell Mountain
- Robinson Family Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Rocca Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Roche Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Rochioli Vineyards & Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Rock Wall Wines; United States: California
- Rocking Horse Winery; United States: California: North Coast: Napa County: Napa Valley
- Rockledge Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Rockmere Wines; United States: California: North Coast: Napa County: Napa Valley
- Rococo Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Rodney Strong Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Rombauer Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Rombi; United States: California: Central Coast: Monterey County: Carmel Valley
- Romeo Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Romililly (no longer in business); United States: California: North Coast: Sonoma County
- Ron Rubin Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Rosenblum Cellars; United States: California
- Rosenthal - The Malibu Estate; United States: California: Southern California: Los Angeles County: Malibu-Newton Canyon
- Roshambo Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Ross Ranch; United States: California: North Coast: Sonoma County: Knights Valley
- Ross Valley Winery (no longer in business); United States: California: Central Coast: Alameda County: San Francisco Bay
- Rossi Wallace; United States: California: North Coast: Napa County: Napa Valley
- Roth Estate Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Roudon-Smith Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Round Pond; United States: California: North Coast: Napa County: Rutherford
- Row Eleven Wine Company; United States: California
- Roy Estate; United States: California: North Coast: Napa County: Napa Valley
- Roy Piper Wines; United States: California: North Coast: Napa County: Napa Valley
- Royal Prince Wines; United States: California: Central Coast
- Rubissow (no longer in business); United States: California: North Coast: Napa County: Mt. Veeder
- Ruby Kurant; United States: California: North Coast: Napa County: Napa Valley
- Rucksack Cellars; United States: California: Sierra Foothills: El Dorado County
- Rudd; United States: California: North Coast: Napa County: Oakville
- Rudius Wines; United States: California: North Coast: Napa County: Napa Valley
- Rued Winery; United States: California: North Coast: Sonoma County
- Rusack Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Russian Hill Estate Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Russian River Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- RustRidge Ranch; United States: California: North Coast: Napa County: Napa Valley
- Rutherford Grove; United States: California: North Coast: Napa County: Napa Valley
- Rutherford Hill; United States: California: North Coast: Napa County: Napa Valley
- Rutherford Oaks Winery; United States: California: North Coast: Napa County: St. Helena
- Rutherford Ranch Winery; United States: California: North Coast: Napa County: Napa Valley
- Rutledge & Vine; United States: California: North Coast: Napa County: Napa Valley
- S by Ray Signorello; United States: California: North Coast: Napa County: Napa Valley
- S.R. Tonella Cellars; United States: California: North Coast: Napa County: Napa Valley
- Sabina Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Saddleback Cellars; United States: California: North Coast: Napa County: Napa Valley
- Saintsbury Winery; United States: California: North Coast: Napa County: Napa Valley
- Salamandre Wine Cellars; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Salinia Wine Company; United States: California: North Coast: Sonoma County: Russian River Valley
- Saluti Cellars; United States: California: Sierra Foothills: El Dorado County
- Salvestrin Wine Company; United States: California: North Coast: Napa County: Napa Valley
- SAMsARA; United States: California: Central Coast: Santa Barbara County
- Samuel Louis Wines; United States: California: Central Coast
- San Marcos Creek Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- San Sakana Cellars; United States: California
- Sandhi Wines; United States: California: Central Coast: Santa Barbara County
- Sangiacomo Wines; United States: California: North Coast: Sonoma County
- Sanguis; United States: California
- Sans Liege Wines; United States: California: Central Coast
- Santa Barbara Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Santa Cruz Mountain Vineyard; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Sapid Wines; United States: California: Central Coast
- Sapphire Hill; United States: California: North Coast: Sonoma County: Russian River Valley
- Sarah Francis Wines; United States: California: North Coast: Napa County: Napa Valley
- Saucelito Canyon Vineyard; United States: California: Central Coast: San Luis Obispo County
- Saunter Wines; United States: California: North Coast: Napa County: St. Helena
- Sausal Winery (no longer in business); United States: California: North Coast: Sonoma County: Alexander Valley
- Savannah-Chanelle Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Saviez Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Sawyer Cellars; United States: California: North Coast: Napa County: Rutherford
- Saxon Brown Wines; United States: California: North Coast: Sonoma County: Sonoma Valley
- Saxum; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Sbragia Family Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Scarecrow Wine; United States: California: North Coast: Napa County: Napa Valley
- Scarlett Wines; United States: California: North Coast: Napa County: Napa Valley
- Scheid Vineyards; United States: California: Central Coast: Monterey County
- Scherrer Winery; United States: California: North Coast: Sonoma County
- Scholium Project; United States: California
- School House Vineyard; United States: California: North Coast: Napa County: Spring Mountain District
- Schrader Cellars; United States: California: North Coast: Napa County: Napa Valley
- Schramsberg Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Schuetz-Oles; United States: California: North Coast: Napa County: Napa Valley
- Schug Carneros Estate Winery; United States: California: North Coast: Sonoma County
- Schulz Cellars; United States: California: North Coast: Napa County: Napa Valley
- Schweiger Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Sciandri Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Scott Harvey Wines; United States: California: North Coast: Napa County: Napa Valley
- Scott Paul Wines; United States: California
- Scratch Wines; United States: California: Central Coast: Monterey County: Arroyo Seco
- Screaming Eagle; United States: California: North Coast: Napa County: Napa Valley
- Screenplay Wines; United States: California: North Coast: Napa County: Napa Valley
- Sculpterra Winery & Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Sea Smoke Cellars; United States: California: Central Coast: Santa Barbara County
- Seabiscuit Ranch; United States: California: Central Coast: Monterey County
- Seagrape Wine Company; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Four Bears Winery; United States: California
- Sean W. McBride; United States: California: North Coast: Napa County: Napa Valley
- Seaver Family Vineyards; United States: California: North Coast: Napa County: Diamond Mountain District
- Seavey Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Sebastiani Vineyards and Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Sebastopol Vineyards - Dutton Ranch; United States: California: North Coast: Sonoma County: Russian River Valley
- Second Line Wines; United States: California: North Coast: Napa County: Napa Valley
- Secret Door; United States: California: North Coast: Napa County: Napa Valley
- Seek; United States: California: North Coast: Napa County: Howell Mountain
- Seghesio Family Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Selah Wines; United States: California: North Coast: Napa County: Napa Valley
- Selby Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Selene Wines (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Senses; United States: California: North Coast: Sonoma County: Sonoma Coast
- Sentium; United States: California: North Coast: Napa County: Napa Valley
- Sequana Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Sequoia Grove Winery; United States: California: North Coast: Napa County: Napa Valley
- Sequum; United States: California: North Coast: Napa County: St. Helena
- Serial Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Seven Apart; United States: California: North Coast: Napa County: Napa Valley
- Seven Oxen; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Seven Peaks Winery; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Seven Stones Winery; United States: California: North Coast: Napa County: St. Helena
- Seventy Five Wine Company; United States: California: North Coast: Napa County: Oakville
- Sextant; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Shadow Canyon Cellars (no longer in business); United States: California: Central Coast: San Luis Obispo County
- Shadowbox Cellars; United States: California: North Coast: Napa County: Napa Valley
- Shafer Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Shane Wine Cellars; United States: California
- Shannon Ridge; United States: California: North Coast: Lake County
- Shayne Kline; United States: California: North Coast: Sonoma County: Sonoma Valley
- Shenandoah Vineyards; United States: California: Sierra Foothills
- Sherwin Family Vineyards; United States: California: North Coast: Napa County: Spring Mountain District
- Shibumi Knoll Winery; United States: California: North Coast: Napa County: Napa Valley
- Shoestring Winery; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Showket-Awni Wines; United States: California: North Coast: Napa County: Napa Valley
- Shypoke Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Siduri Wines; United States: California: North Coast: Sonoma County
- Sierra Oaks Estates; United States: California: Sierra Foothills: El Dorado County
- Sierra Ridge Vineyards; United States: California: Sierra Foothills: Amador County
- Signorello Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Sill Family Vineyards; United States: California: North Coast: Napa County: Atlas Peak
- Silver Mountain Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Silver Oak Cellars; United States: California: North Coast: Napa County: Napa Valley
- Silver Stag Winery; United States: California: North Coast: Napa County: Napa Valley
- Silver Wines; United States: California: Central Coast: Santa Barbara County
- Silverado Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Simi Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Simon Family Estate; United States: California: North Coast: Napa County: Napa Valley
- Sine Qua Non; United States: California: Central Coast
- Sinegal Estate; United States: California: North Coast: Napa County: St. Helena
- Singer Wine; United States: California: North Coast: Sonoma County: Sonoma Coast
- Single Leaf Vineyards & Winery; United States: California: Sierra Foothills: El Dorado County
- Sire Estate; United States: California: North Coast: Napa County: Napa Valley
- Site Wines; United States: California: Central Coast: Santa Barbara County
- Six Degrees; United States: California: North Coast: Sonoma County: Russian River Valley
- Six Hands Winery; United States: California: Inland Valley
- Sjoeblom Winery; United States: California: North Coast: Napa County: Napa Valley
- Skewis Wines; United States: California: North Coast: Sonoma County
- Skinner Vineyards; United States: California: Sierra Foothills: El Dorado County: Fair Play
- Skipstone; United States: California: North Coast: Mendocino County: Anderson Valley
- Sky Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Slaughterhouse Cellars; United States: California: North Coast: Napa County: Rutherford
- Slingshot; United States: California: North Coast
- Slo Down Wines; United States: California: North Coast: Napa County: Napa Valley
- Sloan Estate; United States: California: North Coast: Napa County: Rutherford
- Small Block Wines; United States: California: North Coast: Napa County: Napa Valley
- Small Vines Wines; United States: California: North Coast: Sonoma County
- Smith & Hook / Hahn Estates; United States: California: Central Coast: Monterey County
- Smith Devereux; United States: California: North Coast: Napa County: Napa Valley
- Smith Family Wines; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Smith Story Wine Cellars; United States: California: North Coast
- Smith Wooton; United States: California: North Coast: Napa County: Napa Valley
- Smith-Madrone; United States: California: North Coast: Napa County: Spring Mountain District
- Snowden Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Sobon Estate; United States: California: Sierra Foothills
- Sodaro Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- Sodhani Vineyards; United States: California: North Coast: Napa County: St. Helena
- Sogno Winery; United States: California: Sierra Foothills: El Dorado County
- Sojourn Cellars; United States: California: North Coast: Sonoma County: Sonoma Valley
- Sol Rouge; United States: California: North Coast: Lake County: Red Hills
- Solis Winery; United States: California: Central Coast: Santa Clara County
- Solitude; United States: California: North Coast: Sonoma County: Carneros
- Somerston Estate; United States: California: North Coast: Napa County: Napa Valley
- Somnium; United States: California: North Coast: Napa County: Napa Valley
- Soñador Cellars; United States: California: North Coast: Napa County: Napa Valley
- Sonoma Coast Vineyards & Winery; United States: California: North Coast: Sonoma County: Sonoma Coast
- Sonoma Creek Winery; United States: California: North Coast: Sonoma County: Carneros
- Sonoma-Cutrer Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Sort This Out Cellars; United States: California
- Sosie Wines; United States: California: North Coast: Sonoma County
- Source-Napa; United States: California: North Coast: Napa County: St. Helena
- Spann Vineyards; United States: California: North Coast: Sonoma County
- Spelletich Cellars; United States: California: North Coast: Napa County: Napa Valley
- Spence Vineyards; United States: California: North Coast: Napa County: Howell Mountain
- Spencer-Roloson Winery; United States: California: North Coast: Sonoma County
- Spenker Winery; United States: California: Inland Valley: San Joaquin County: Lodi
- Spicerack Vineyards; United States: California: North Coast: Sonoma County: Sonoma Coast
- Spoto Wines; United States: California: North Coast: Napa County: Napa Valley
- Spottswoode Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- Spring Mountain Vineyard; United States: California: North Coast: Napa County: Napa Valley
- St. Amant Winery; United States: California: Inland Valley: San Joaquin County: Lodi
- St. Barthélemy Cellars; United States: California: North Coast: Napa County: Napa Valley
- St. Clair; United States: California: North Coast: Napa County: Napa Valley
- St. Clair Brown Winery; United States: California: North Coast: Napa County: Napa Valley
- St. Clement Vineyards; United States: California: North Coast: Napa County: St. Helena
- St. Francis; United States: California: North Coast: Sonoma County
- St. Helena Road Winery; United States: California: North Coast: Sonoma County
- St. Supéry Vineyards & Winery; United States: California: North Coast: Napa County: Rutherford
- Stacked Stone Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Stag's Leap Wine Cellars; United States: California: North Coast: Napa County: Stags Leap District
- Stage Left Cellars; United States: California
- Staglin Family Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Stags' Leap Winery; United States: California: North Coast: Napa County: Stags Leap District
- Stalworth Wine; United States: California: North Coast: Napa County: Napa Valley
- Standard Deviation; United States: California: North Coast: Sonoma County
- Stanton Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Starfield Vineyards; United States: California: Sierra Foothills
- Starry Night Winery; United States: California
- Steelemack Wines; United States: California: North Coast: Napa County: Oak Knoll District
- Stefan Daniels Cellars; United States: California: North Coast: Lake County
- Stefania Wine; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Stein Family Wines; United States: California
- Stellareese; United States: California: North Coast: Napa County: Napa Valley
- Steltzner Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Stephan Ridge; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Stephen & Walker Winery; United States: California: North Coast: Sonoma County
- Stephen Ross Wine Cellars; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Sterling Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Steven Kent Winery; United States: California: Central Coast: Alameda County: Livermore Valley
- Stewart Cellars; United States: California: North Coast: Napa County: Napa Valley
- Stirm Wine; United States: California: Central Coast: Santa Cruz County
- Stolo Family Winery; United States: California: Central Coast
- Stolpman Vineyards; United States: California: Central Coast: Santa Barbara County
- Stomping Girl Wines; United States: California
- Stone Creek Wines; United States: California
- Stone Edge Farm; United States: California: North Coast: Sonoma County
- Stone The Crows; United States: California: North Coast: Napa County: Napa Valley
- Stonefly Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Stonegate Winery; United States: California: North Coast: Napa County: Napa Valley
- Stonehedge Winery; United States: California: North Coast: Napa County: Napa Valley
- Stones; United States: California: North Coast: Napa County: Napa Valley
- Stonestreet Vineyard & Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Stonum Vineyards; United States: California: Inland Valley: San Joaquin County: Lodi
- Stony Hill Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Stormy Weather Wine; United States: California: North Coast: Napa County: Napa Valley
- Storrs Winery; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Story Winery; United States: California: Sierra Foothills: Amador County
- Storybook Mountain; United States: California: North Coast: Napa County: Napa Valley
- Strata Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Stratford Winery; United States: California: North Coast: Napa County: Napa Valley
- Stratton Lummis; United States: California: North Coast: Napa County: Napa Valley
- Streamside Vineyard; United States: California
- Stringer Cellars; United States: California: North Coast: Napa County: Napa Valley
- Stryker Sonoma Winery & Vineyards; United States: California: North Coast: Sonoma County: Alexander Valley
- Stuhlmuller Vineyards; United States: California: North Coast: Sonoma County: Alexander Valley
- Sullivan Family Estate; United States: California: North Coast: Napa County: Napa Valley
- Summer Water; United States: California
- Summerland Winery; United States: California: Central Coast
- Summers Wines; United States: California: North Coast: Napa County: Napa Valley
- Summit Lake Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Sunce Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Sunfire Estate Winery; United States: California: Sierra Foothills
- Sunset Cellars; United States: California
- Sunset Ridge Vineyards (No longer in business); United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Surh Luchtel Cellars; United States: California: North Coast: Napa County: Napa Valley
- Swanson Vineyards; United States: California: North Coast: Napa County: Rutherford
- Switchback Ridge; United States: California: North Coast: Napa County: Napa Valley
- Sylvester Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Sylvie Estate; United States: California: North Coast: Napa County: Oakville
- T-Vine Cellars; United States: California: North Coast: Napa County: Napa Valley
- T. Berkley Wines; United States: California
- Tablas Creek Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Taft Street Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Talisman Wines; United States: California: North Coast: Sonoma County
- Talley Vineyards; United States: California: Central Coast
- Talomas Vineyards; United States: California: Central Coast
- Tamas Estates; United States: California: Central Coast: Alameda County: Livermore Valley
- Tamayo Family Vineyards; United States: California: Central Coast: Alameda County: San Francisco Bay
- Tamber Bey Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Tandem Winery (no longer in business); United States: California
- Tangent Winery; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Tank Garage Winery; United States: California: North Coast: Napa County: Calistoga
- Tantalus Vineyards; United States: California: North Coast: Sonoma County: Sonoma Valley
- Tantara Winery; United States: California: Central Coast: Santa Barbara County
- Tapestry; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Tara Bella Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Tarius Wines (no longer in business); United States: California: North Coast: Sonoma County: Russian River Valley
- Tarpon Cellars; United States: California: North Coast: Napa County: Napa Valley
- Tate; United States: California: North Coast: Napa County: Napa Valley
- Tatomer Wines; United States: California: Central Coast
- Taylor Family Vineyards; United States: California: North Coast: Napa County: Stags Leap District
- Tayson Pierce Estate Wines; United States: California: North Coast: Napa County: Napa Valley
- Teachworth; United States: California: North Coast: Napa County: Diamond Mountain District
- Tedeschi Family Winery; United States: California: North Coast: Napa County: Napa Valley
- Teeter-Totter Wines; United States: California: North Coast: Napa County: Napa Valley
- Teneral Cellars; United States: California
- Tercero Wines; United States: California: Central Coast: Santa Barbara County
- Terminim; United States: California: North Coast: Mendocino County
- Terra Bella Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Terra Valentine; United States: California: North Coast: Napa County: Napa Valley
- Terry Hoage Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Tesla Vintners; United States: California: Central Coast: Alameda County: Livermore Valley
- Tesoro Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Tess Winery; United States: California: North Coast: Napa County: Rutherford
- Tessier Winery; United States: California
- Testa Vineyards; United States: California: North Coast: Mendocino County
- Testarossa Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- TEXTBOOK; United States: California: North Coast: Napa County: Oakville
- Texture Wines; United States: California: North Coast: Sonoma County
- TH Estate Wines; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Thacher; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- The Calling Wines; United States: California: North Coast: Sonoma County
- The Crane Assembly; United States: California: North Coast: Napa County: Napa Valley
- The Debate; United States: California: North Coast: Napa County: Napa Valley
- The Donum Estate; United States: California: North Coast: Sonoma County: Carneros
- The Farm Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- The Forager; United States: California
- The Grade Cellars; United States: California: North Coast: Napa County: Napa Valley
- The Hilt Winery; United States: California: Central Coast
- The Hobo Wine Company; United States: California: North Coast: Sonoma County: Russian River Valley
- The Line Wines; United States: California: North Coast: Sonoma County
- The Mascot; United States: California: North Coast: Napa County: Napa Valley
- The Mountain Winery; United States: California
- The Paring; United States: California: Central Coast: Santa Barbara County
- The People’s Wine Revolution; United States: California: North Coast: Napa County: Napa Valley
- The Prisoner; United States: California
- The Setting Wines; United States: California: North Coast: Sonoma County
- The Terraces; United States: California: North Coast: Napa County: Rutherford
- The Vice Wine; United States: California: North Coast: Napa County: Napa Valley
- The Vineyard House; United States: California: North Coast: Napa County: Napa Valley
- The Vineyardist; United States: California: North Coast: Napa County: Napa Valley
- The Withers; United States: California
- Theorem Vineyards; United States: California: North Coast: Napa County: Calistoga
- Thirteen Appellations; United States: California: North Coast: Napa County: Napa Valley
- Thirty-Seven Wines; United States: California: North Coast: Sonoma County
- Thomas Coyne Winery (no longer in business); United States: California: Central Coast: Alameda County: Livermore Valley
- Thomas Fogarty Winery & Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Thomas George Estates; United States: California: North Coast: Sonoma County: Russian River Valley
- Thomas Michael; United States: California: North Coast: Napa County: Los Carneros
- Thompkin Cellars; United States: California: Central Coast: Santa Barbara County
- Thornton Winery; United States: California: Southern California: Riverside County: Temecula Valley
- Three Clicks; United States: California: North Coast: Napa County: Napa Valley
- Three Furies Wines; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Three Monkeys Wines; United States: California: North Coast: Napa County: Napa Valley
- Three Sticks Winery; United States: California: North Coast: Sonoma County
- Thumbprint Cellars; United States: California: North Coast: Sonoma County
- Thunderbolt Junction Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Tierra Roja; United States: California: North Coast: Napa County: Oakville
- Timeless Napa Valley; United States: California: North Coast: Napa County: Napa Valley
- Tin Barn Vineyards; United States: California: North Coast: Sonoma County
- Tin House Winery; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Tin Star; United States: California: North Coast: Napa County: Napa Valley
- Tiny Vineyards Wine Company; United States: California: North Coast: Sonoma County
- Titus Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Toad Hollow Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Tobacco Road Cellars; United States: California: North Coast: Napa County: Napa Valley
- Tobin James Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Tofanelli Family Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Toivola Vineyards; United States: California: North Coast: Napa County: Coombsville
- Tolosa Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Tom Eddy Wines; United States: California: North Coast: Napa County: Napa Valley
- Tom Mackey Cellars; United States: California: North Coast: Sonoma County
- Tom Scott Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Toogood Estate Winery; United States: California: Sierra Foothills
- Topel Winery; United States: California: North Coast: Mendocino County
- Toquade Wines; United States: California: North Coast: Napa County: Napa Valley
- Tor Kenward Family Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Torrin; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Toucan Wines (no longer in business); United States: California: Central Coast
- Tower 15 Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- TR Elliott; United States: California: North Coast: Sonoma County: Russian River Valley
- Trahan Winery; United States: California: North Coast: Napa County: Napa Valley
- Treana Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Treasure Island Wines; United States: California
- Trefethen Vineyards & Winery; United States: California: North Coast: Napa County: Napa Valley
- Trentadue Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Tres Perlas; United States: California: North Coast: Napa County: Napa Valley
- Tres Sabores; United States: California: North Coast: Napa County: Rutherford
- Trespass Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Trestle Glen Vineyards; United States: California: North Coast: Sonoma County
- Trim Wines; United States: California
- Trinitas Cellars; United States: California: North Coast: Napa County: Napa Valley
- Trione Vineyards; United States: California: North Coast: Sonoma County
- Triple Seven Cellars; United States: California: North Coast: Napa County: Napa Valley
- Tristant Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Trivium Wine; United States: California: North Coast: Napa County: Napa Valley
- Trois Noix; United States: California: North Coast: Napa County: Napa Valley
- Trotter 1/16 Winery; United States: California: North Coast: Napa County: Coombsville
- Troublemaker; United States: California
- Truchard Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Trujillo Wines; United States: California: North Coast: Napa County: Napa Valley
- Tuck Beckstoffer Wines; United States: California: North Coast: Napa County: Rutherford
- Tudal Winery; United States: California: North Coast: Napa County: Napa Valley
- Tudor Wines; United States: California: Central Coast: Monterey County: Santa Lucia Highlands
- Tulip Hill Winery; United States: California
- Tulocay Winery; United States: California: North Coast: Napa County: Napa Valley
- Turley Wine Cellars; United States: California: North Coast: Napa County: Napa Valley
- Turnbull Wine Cellars; United States: California: North Coast: Napa County: Napa Valley
- Turning Tide Wines; United States: California: Central Coast: Santa Barbara County
- Turtle Rock Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Tusk Estates; United States: California: North Coast: Napa County: Napa Valley
- Twenty Rows; United States: California: North Coast: Napa County: Mt. Veeder
- Twisted Oak Winery; United States: California: Sierra Foothills
- Two Old Dogs; United States: California: North Coast: Napa County: Napa Valley
- Two Shepherds; United States: California: Central Coast
- Two Wives; United States: California: North Coast: Napa County: Napa Valley
- Twomey Cellars; United States: California: North Coast: Napa County: Napa Valley
- Ty Caton Vineyards; United States: California: North Coast: Sonoma County
- Tyler Winery; United States: California: Central Coast: Santa Barbara County
- Under The Wire; United States: California: North Coast: Sonoma County
- Une Femme; United States: California
- Unti Vineyards; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Unwritten Wines; United States: California: North Coast: Napa County: Napa Valley
- Uproot; United States: California: North Coast: Napa County: St. Helena
- Upside Wines (no longer in business); United States: California
- Urban Legend Cellars; United States: California
- Uvaggio; United States: California
- V Madrone Winery; United States: California: North Coast: Napa County: Napa Valley
- V-Twin Vineyards; United States: California: North Coast: Sonoma County
- V. Sattui Winery; United States: California: North Coast: Napa County: Napa Valley
- V. Vineyards; United States: California: North Coast: Sonoma County
- Valance; United States: California: North Coast: Napa County: Howell Mountain
- Valley Floor Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Valley Legend; United States: California: North Coast: Napa County: Napa Valley
- Valley Oak Winery; United States: California: Inland Valley: Fresno County
- Valley of the Moon Winery; United States: California: North Coast: Sonoma County: Sonoma Valley
- Van der Heyden Vineyard (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Vandale Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Varner; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Varozza Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Vaughn Duffy; United States: California: North Coast: Sonoma County
- Vellum Wine Craft; United States: California: North Coast: Napa County: Napa Valley
- Venge Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Ventana Vineyards; United States: California: Central Coast: Monterey County: Arroyo Seco
- Verdad; United States: California: Central Coast
- Vergari Wines (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Verge Wine; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Verismo Wines; United States: California: North Coast: Napa County: Napa Valley
- Vérité; United States: California: North Coast: Sonoma County: Russian River Valley
- Vermeil Wines; United States: California: North Coast: Napa County: Napa Valley
- VIADER Vineyards & Winery; United States: California: North Coast: Napa County: Howell Mountain
- Viano Winery; United States: California
- Viansa Winery; United States: California: North Coast: Sonoma County: Carneros
- Vice Versa Wines; United States: California: North Coast: Napa County: Napa Valley
- Vida Valiente; United States: California: North Coast: Napa County: St. Helena
- Vie Winery; United States: California
- Vigo Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Villa Creek Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Villa del Monte (no longer in business); United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Villa Helena Winery; United States: California: North Coast: Napa County: Napa Valley
- Villa Mt. Eden; United States: California: North Coast: Napa County: Napa Valley
- Villa Ragazzi; United States: California: North Coast: Napa County: Oakville
- Villa San-Juliette Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Villa Toscano Winery; United States: California: Sierra Foothills
- Viluko Vineyards; United States: California: North Coast: Sonoma County
- Vina Moda Winery; United States: California: Sierra Foothills
- Vina Robles; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Vincent Arroyo Winery; United States: California: North Coast: Napa County: Napa Valley
- Vine Cliff Winery; United States: California: North Coast: Napa County: Napa Valley
- Vine Hill Ranch; United States: California: North Coast: Napa County: Napa Valley
- Vine Wrangler; United States: California: North Coast: Sonoma County: Russian River Valley
- Vines on the Marycrest; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Vineyard 29; United States: California: North Coast: Napa County: Napa Valley
- Vineyard 36; United States: California: North Coast: Napa County: Napa Valley
- Vineyard 511; United States: California: North Coast: Napa County: Diamond Mountain District
- Vineyard 7 & 8; United States: California: North Coast: Napa County: Spring Mountain District
- Vinh-Rebhahn Vineyards; United States: California: Central Coast: Santa Clara County
- VinNostro Cellars; United States: California
- Vino Noceto; United States: California: Sierra Foothills: Amador County
- Vino V Wines; United States: California: Central Coast: Santa Barbara County
- Vinoce Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Vinos Finos de California; United States: California
- Vin Roc; United States: California: North Coast: Napa County: Napa Valley
- Vinum Cellars; United States: California: Sierra Foothills: El Dorado County
- Vision Cellars; United States: California
- Vista Del Rey Vineyards; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Viviani; United States: California: North Coast: Napa County: Napa Valley
- Vivier; United States: California: North Coast: Napa County: Napa Valley
- VJB Vineyards and Cellars; United States: California: North Coast: Sonoma County
- Voces; United States: California: North Coast: Napa County: Napa Valley
- Volker Eisele Family Estate; United States: California: North Coast: Napa County: Chiles Valley
- von Strasser Winery (no longer in business); United States: California: North Coast: Napa County: Napa Valley
- Voon Wines; United States: California
- Vörös Cellars; United States: California: North Coast: Napa County: Napa Valley
- Voss Vineyards; United States: California: North Coast: Napa County: Napa Valley
- W.H. Smith Wines; United States: California: North Coast
- Wade Cellars; United States: California: North Coast: Napa County: Napa Valley
- Walker Station Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- Wallis Estate; United States: California: North Coast: Napa County: Diamond Mountain District
- Walt Wines; United States: California: North Coast: Sonoma County
- Walter Hansel Vineyards; United States: California: North Coast: Sonoma County: Russian River Valley
- WaterMark; United States: California: North Coast: Napa County: Napa Valley
- Watkins Family Winery; United States: California: North Coast: Sonoma County
- Wattle Creek Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- Waugh Cellars; United States: California: North Coast: Napa County: Napa Valley
- Wayfarer; United States: California
- Wayne Family Estate; United States: California: North Coast: Napa County: Calistoga
- Waypoint; United States: California
- Weather Wines; United States: California
- Wellington Cellars; United States: California: North Coast: Sonoma County: Sonoma Valley
- Wente Vineyards; United States: California: Central Coast: Alameda County: Livermore Valley
- Wermuth Winery; United States: California: North Coast: Napa County: Napa Valley
- West of Temperance; United States: California
- Westbrook Wine Farm; United States: California: Sierra Foothills
- Westerly Vineyards; United States: California: Central Coast: Santa Barbara County: Santa Ynez Valley
- Westside Red; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Westwood Winery; United States: California: North Coast: Sonoma County
- Wharton; United States: California: North Coast: Napa County: Napa Valley
- Wheeler Farms; United States: California: North Coast: Napa County: Napa Valley
- Whetstone Wine Cellars; United States: California: North Coast: Sonoma County: Sonoma Coast
- Whitcraft Winery; United States: California: Central Coast: Santa Barbara County
- White Cottage Ranch; United States: California: North Coast: Napa County: Howell Mountain
- White Oak Winery; United States: California: North Coast: Sonoma County: Alexander Valley
- White Rock Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Whitehall Lane Winery; United States: California: North Coast: Napa County: Napa Valley
- Whitford Cellars; United States: California: North Coast: Napa County: Napa Valley
- Wiens Cellars; United States: California: Southern California: Riverside County: Temecula Valley
- Wild Coyote Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Wild Hog Vineyard; United States: California: North Coast: Sonoma County: Sonoma Coast
- Wild Horse Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Wildflower Winery; United States: California: Central Coast
- William Cole Vineyards; United States: California: North Coast: Napa County: St. Helena
- William Hill Estate Winery; United States: California: North Coast: Napa County: Napa Valley
- William Knuttel; United States: California: North Coast: Napa County: Napa Valley
- Williams Selyem Winery; United States: California: North Coast: Sonoma County: Russian River Valley
- Wilson Winery; United States: California: North Coast: Sonoma County: Dry Creek Valley
- Wind Gap; United States: California
- Windemere; United States: California: Central Coast: San Luis Obispo County: Edna Valley
- Windracer Wines; United States: California: North Coast: Mendocino County: Anderson Valley
- Windsor Oaks Vineyards; United States: California: North Coast: Sonoma County
- Windwalker Vineyards; United States: California: Sierra Foothills: El Dorado County
- Windward Vineyard; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Wine Guerrilla; United States: California: North Coast: Sonoma County
- Wine Spots; United States: California
- Winery Sixteen 600; United States: California: North Coast: Sonoma County: Sonoma Valley
- Wing Canyon Vineyard; United States: California: North Coast: Napa County: Mt. Veeder
- Winter; United States: California: North Coast: Napa County: St. Helena
- Wishlist Wines; United States: California
- Witchery Wine; United States: California: North Coast: Napa County: Napa Valley
- Wolf Family Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Wonderment Wines; United States: California
- Wood Family Vineyards; United States: California: Central Coast: Alameda County: Livermore Valley
- Woodenhead Vintners; United States: California: North Coast: Sonoma County: Russian River Valley
- Woodside Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- Work Vineyard; United States: California: North Coast: Napa County: Napa Valley
- Wrath Wines; United States: California: Salinas Valley
- Wren Hop Vineyards; United States: California: North Coast: Sonoma County
- X Winery; United States: California
- XYZin; United States: California
- Y. Rousseau Wines.; United States: California: North Coast
- Yao Family Wines; United States: California: North Coast: Napa County: Napa Valley
- Yates Family Vineyard; United States: California: North Coast: Napa County: Mt. Veeder
- Yorba Wines; United States: California: Sierra Foothills: Amador County
- Yorkville Cellars; United States: California: North Coast: Mendocino County
- Young Inglewood; United States: California: North Coast: Napa County: St. Helena
- Yount Ridge Cellars; United States: California: North Coast: Napa County: Oakville
- Zaca Mesa Winery; United States: California: Central Coast: Santa Barbara County
- Zacherle Wines; United States: California: North Coast: Napa County: Napa Valley
- Zahtila Vineyards; United States: California: North Coast: Napa County: Napa Valley
- Zakin Estate Wines; United States: California: North Coast: Napa County: Napa Valley
- Zayante Vineyards; United States: California: Central Coast: Santa Cruz County: Santa Cruz Mountains
- ZD Wines; United States: California: North Coast: Napa County: Napa Valley
- Zeitgeist Cellars; United States: California: North Coast: Napa County: St. Helena
- Zenaida Cellars; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Zepaltas Wines (no longer in business); United States: California: North Coast: Sonoma County
- Zeppelin Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Ziata Wines; United States: California: North Coast: Napa County: Napa Valley
- ZinAlley Winery; United States: California: Central Coast: San Luis Obispo County: Paso Robles
- Zinfandelic Wines; United States: California
- Zotovich Cellars; United States: California: Central Coast: Santa Barbara County: Sta. Rita Hills
- Zouzounis Wines; United States: California: North Coast: Sonoma County