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
Antioch is part of Contra Costa County in California and has a total area of 75.324 (square kilometres). Contra Costa County in California, where Vietnamese is spoken, is part of the San Francisco Bay Area.