Contra Costa County Office of the Sheriff

The Contra Costa County Office of the Sheriff is the largest law enforcement agency in Contra Costa with over 1,100 sworn and professional employees dedicated to providing the highest level of law enforcement and customer services. The Office of the Sheriff offers a full range of services to over 1,000,000 residents in the 715-square mile county.


The duties and mission of the Sheriff’s Office are unlike most police agencies. Responsibilities include unincorporated area policing, contract cities (Danville, Lafayette, and Orinda) and special districts, air support (helicopters), marine patrol, dispatch, investigations, coroners, county detention facilities, custody alternative, court security, forensic services, police academy, and Office of Emergency Services. 

Here are some annual Office of the Sheriff statistics:


Over 600,000 calls for service come into Dispatch. Nearly 60,000 of them are 911 calls. Over 26,000 people are booked into the Martinez Detention Facility. Over 20,000 incident reports are written.


The Office of the Sheriff works closely with our many partners in the community to include residents, businesses, schools, leaders, and private and governmental agencies to prevent crime and improve the quality of life. We are proud to be of service to Contra Costa County.