Sheriff David O. Livingston oversees the over one thousand dedicated sworn and civilian employees of the Contra Costa County Office of the Sheriff. The Contra Costa Sheriff's Office delivers a full range of law enforcement services to over one million residents in the 750 square mile county, the eight largest in the state. Deputy Sheriffs and dispatchers provide police services to the unincorporated areas and a number of contract cities and special districts. Additionally, the Sheriff's Office operates the county detention facilities, provides security for the courts and runs the county Office of Emergency Services. Visit cocosheriff.org for more information. You can also visit our Facebook page - Contra Costa Sheriff.