Antioch,_California | isPartOf | California United_States_House_of_Representatives | isPartOf | United_States_Congress Antioch,_California | isPartOf | Contra_Costa_County,_California Antioch,_California | leaderTitle | United_States_House_of_Representatives California | language | Spanish_language
Antioch is part of Contra Costa County in California and is governed by the United States House of Representatives, which is part of the United States Congress. California is where you can hear the Spanish language being spoken.