Contra Costa is the 150th American Viticultural Area (AVA) in California located in the San Francisco Bay Area. It lies east of San Pablo Bay in Contra Costa County on the southern banks of the Carquinez Strait encompassing the area around the cities of Concord, Martinez, Pittsburg, Antioch and Brentwood. It was established on March 14, 2024 by the Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury after reviewing the petition submitted by Patrick Shabram on behalf of the Contra Costa Winegrowers Association proposing to establish an viticultural area named "Contra Costa."