Wine producers - CaliforniaBeta
- Quady Winery California
- Quintessa Napa
- Qupe Wine Cellars Santa Barbara County
- Radio-Coteau California
- Ramey Wine Cellars California
- Rancho Zabaco Sonoma County
- Ravenswood Winery California
- Realm Cellars Napa County
- Regusci Winery Napa County
- Ridge Vineyards California
- Roar Wines Monterey County
- Robert Mondavi Winery California
- Robert Sinskey Vineyards Napa County
- Roederer Estate Mendocino County
- Roots Run Deep Winery Napa County
- RPM Wines Sierra Foothills
- Rudd Estate Napa
- Rutherford Hill Napa County
- Rutz Cellars Sonoma County
- Saintsbury California