Antioch Police Department

Antioch Police Department is the municipal law-enforcement agency for the City of Antioch in Contra Costa County, California, based at 300 L St. The department serves residents, businesses, and visitors within Antioch limits in Contra Costa County. Its area of responsibility covers patrol and response to calls for service, traffic enforcement, criminal investigations inside the city, and community policing programs that support local neighborhoods and commercial corridors. Antioch sits in a California community corridor linking residential and commercial areas, and the police department is the primary local law-enforcement presence for day-to-day public safety inside the city. Public safety emergencies in Antioch should be reported by dialing 911.

According to the U.S. Census Bureau (ACS 2023), Antioch city, CA has an estimated population of 115,759.