Antioch,_California | isPartOf | Contra_Costa_County,_California Antioch,_California | isPartOf | California California | language | English_language Antioch,_California | areaTotal | 75.324 (square kilometres) Contra_Costa_County,_California | isPartOf | San_Francisco_Bay_Area
With a total are of 75.324 square km, Antioch is in English speaking California. Antioch, is part of Contra Costa County, which is part of the San Francisco Bay Area.