Antioch,_California | isPartOf | Contra_Costa_County,_California Antioch,_California | isPartOf | California California | language | Vietnamese_language Contra_Costa_County,_California | isPartOf | San_Francisco_Bay_Area Antioch,_California | leaderTitle | United_States_House_of_Representatives
Antioch, in Contra Costa County, California, is led by the U. S. House of Representatives. Contra Costa County is part of the San Francisco Bay area of the state where one of the spoken languages is Vietnamese.