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 English language is spoken in California. Antioch, part of Contra Costa County (California), is led by the United States House of Representatives which is part of the United States Congress.