Contra_Costa_County,_California | isPartOf | San_Francisco_Bay_Area Antioch,_California | isPartOf | California Antioch,_California | isPartOf | Contra_Costa_County,_California Antioch,_California | leaderTitle | Mayor California | language | Spanish_language
Antioch, is part of Contra Costa County in California which is part of the San Francisco Bay Area. The city is led by a mayor and Spanish is spoken in the state.