Antioch,_California | isPartOf | Contra_Costa_County,_California Antioch,_California | isPartOf | California California | language | Vietnamese_language Antioch,_California | areaTotal | 75.324 (square kilometres) Contra_Costa_County,_California | isPartOf | San_Francisco_Bay_Area
In the San Francisco Bay area is Antioch, which is a part of Contra Costa County California and has an area of 75.324 Sq.Km. Vietnamese is a language spoken in California.