California: Bay Area Wine Regions

The Bay area is home to over 1400 wineries. Napa County alone has over 690 wineries and Sonoma is a close second with 570 licensed wineries.

The Bay area is made up out of: Alameda County, Contra Costa County, Marin County, Napa County, San Francisco County, San Mateo County, Santa Clara County, Solano County and Sonoma County.