911 Services | Contra Costa County Office of The Sheriff
1850 Muir Road, Martinez, CA 94553
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24 hours daily
English and Spanish
Call or visit website; if calling from a cell phone use backdoor number for emergencies or to report suspicious activity.
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Contra Costa County
Provides oversight of county detention facilities, follow-up of felonies and crimes committed in the county, patrol services for unincorporated areas of the county, oversees the Office of Emergency Services, and other related services.
Contra Costa County Office of The Sheriff
Provides oversight of all Office of the Sheriff operations, including Coroner's Office, detention facilities, patrol services for unincorporated Contra Costa County, follow-up of felony and misdemeanor crimes committed in the County, oversees the County's Office of Emergency Services, and other related law enforcement and homeland security services. Also provides drop-off for unused/expired medications.