Contra Costa County, website
Contra Costa County in California uses area codes 510 and 925. This page is a phonebook directory where you will find the physical address and contact information of the most relevant government offices in Contra Costa, including the Clerk’s Office, Sheriff’s Office, and the Health Department.
Sheriff’s Office
1850 Muir Road, Martinez, CA 94553
Phone: (925) 655-0000
Superior Court
725 Court Street
Martinez, CA 94553
Phone: (925) 608-1000
District Attorney’s Office
900 Ward St.
Martinez, CA 94553
Phone: (925) 957-2200
Fax: (925) 957-2240
Clerk-Recorder Office
555 Escobar Street
Martinez, CA 94553
Phone: (925)-335-7900
Treasurer -Tax Collector
625 Court St., Ste. 100
Martinez CA 94553
Phone: (925) 957-5280
Health Department
2355 Stanwell Cir., Concord, CA 94520
Phone: (925) 646-5275
Contra Costa County Jail
901 Court St., Martinez, CA 94553
Phone: (925) 335-4600
Emergency Management
1850 Muir Road, Martinez, CA 94553
Phone: (925) 646-2441
Social Services
1025 Escobar Street
4th Floor, Martinez, CA 94553
Phone: (925) 655-2051
Fire Department
4005 Port Chicago Highway, Suite 250
Concord, CA 94520-1180
Phone: (925) 941-3300
Fax: (925) 941-3309
Email: [email protected]
Department of Education
77 Santa Barbara Rd., Pleasant Hill, CA 94523
Phone: (925) 942-3388