Antioch,_California | isPartOf | California California | language | English_language United_States_House_of_Representatives | isPartOf | United_States_Congress Antioch,_California | isPartOf | Contra_Costa_County,_California Antioch,_California | leaderTitle | United_States_House_of_Representatives
The city of Antioch, part of Contra Costa County, is in California. English is spoken in that state. The leader of Antioch is the House of Representatives which is part of the United States Congress.