South Coast is an American Viticultural Area (AVA) located in Southern California that encompasses five counties: Los Angeles, Orange, Riverside, San Bernardino, and San Diego. It was established as the nation's 82nd and the state's 46th appellation on November 21, 1985 by the Bureau of Alcohol, Tobacco and Firearms (ATF), Treasury after reviewing the petition submitted by the South Coast Vintners Association on behalf of grape growers and wineries in the region proposing a viticultural area to be known as "South Coast."