- R and B Cellars
- R and G Schatz Farms
- R and J Blum Estate Vineyards
- R L Wine Co.
- R Merlo Estate Vineyard
- R N Estate
- R N K Vineyard
- R N L Winery
- R. Merlo Estate Vineyards
- R. Stuart & Co.
- Rabbit Ridge Winery & Vineyards
- Racine Wine Co.
- Radio-Coteau Wine Cellars
- Radog Wines
- Raffaldini Vineyards And Winery
- Raft River Vintners
- Raftshol Vineyards
- Ragapple Lassie Vineyards and Winery
- Rainbow Hill Vineyards
- Rainbow Ridge Wines
- Rainbow Ridge Wines
- Rainbows End Vineyard
- Rainey Valley Winery
- Rainsong Vineyard
- Ramazzotti Wines
- Ramazzotti Wines
- Ramey Wine Cellars
- Ramian Estate
- Ranchita Canyon Vineyard
- Rancho Arroyo Grande Winery and Vineyards
- Rancho de Andallusia
- Rancho De Philo
- Rancho De Solis Winery
- Rancho La Vina Vineyards
- Rancho Roble Vineyards
- Rancho Rossa Vineyards
- Rancho Sin Frenos
- Rancho Sisquoc Winery
- Rancho Sotoyome
- Rancho Zabaco Winery
- Randall Harris Winery
- Random Ridge
- Ransom Wine Co. and Distillery
- Rapazzini Winery