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
Antioch, Contra Costa County, in the San Francisco Bay area, is part of English speaking, California, United States. Antioch has an area of 75.3242 sq km.