Antioch,_California | isPartOf | Contra_Costa_County,_California Antioch,_California | isPartOf | California Antioch,_California | areaTotal | 75.324 (square kilometres) Contra_Costa_County,_California | isPartOf | San_Francisco_Bay_Area California | language | Spanish_language
Spanish is spoken in California which is where Antioch is located. The city, which has a total area of 75,324 sq km is part of Contra Costa County which is included in the San Francisco bay area.