California, county records

Contra Costa County, California Public Records

Find the right office in Contra Costa County. Court cases, deeds and parcels, sheriff and jail records, vital records and county filings, each linked to the office that keeps them, with addresses and phone numbers.

Official sources first Free directory Links checked Sep. 13, 2026 Mobile friendly

Start here

Most requested Contra Costa County records

Every card below goes to the government office responsible for that record. Use the category buttons to narrow the list.

Filter by type

Showing 12 official sources

Everything else, organized

More official Contra Costa County record sources

Secondary links stay collapsed until they are needed, keeping the page useful without turning it into an endless wall of cards.

More county sources

Local record guide

About public records in Contra Costa County

Useful local context without burying the official record links above.

County profile

Contra Costa County at a glance

State
California
County seat
Martinez
Population
1,153,526
Area
804 sq mi
Founded
1850
Cities and towns
29

Contra Costa County offices and records

Sheriff & Law Enforcement. Contra Costa County Sheriff's Office is responsible for law enforcement in the unincorporated areas of Contra Costa County.

Police Departments. Contra Costa County is served by several law enforcement agencies, including Contra Costa County Sheriff's Office and municipal police departments such as the Concord Police Department, Richmond Police Department, and Walnut Creek Police Department.

Law Enforcement & Arrests. Contra Costa County Sheriff's Office, headquartered at 1980 Muir Road in Martinez, serves unincorporated areas and provides countywide law enforcement services including jail operations, court security, and investigations. Arrest records in Contra Costa County are public records accessible under the California Public Records Act (Government Code Section 6250 et seq.), which requires agencies to provide public access to records unless specifically exempted.

Criminal Records. These records are maintained by Contra Costa County Superior Court and the sheriff's office.

Arrest Records. Arrest records in Contra Costa County are maintained by Contra Costa County Sheriff's Office and local police departments.

Mugshots & Booking Photos. Mugshots in Contra Costa County are taken and retained by Contra Costa County Sheriff's Office during the booking process.

Property tax information is managed by Contra Costa County Assessor's Office at 2530 Arnold Drive, Suite 100, Martinez, CA 94553 (phone: 925-313-7400). Contra Costa County Recorder-Clerk's Office, located at 555 Escobar Street in Martinez, California 94553 (phone: 925-335-7900), maintains and provides access to official land and property records for Contra Costa County. The court operates multiple facilities throughout Contra Costa County. The main courthouse is located at 1020 Ward Street in Martinez (925-608-1000), with additional courthouses in Richmond at 100 37th Street, Walnut Creek at 640 Ygnacio Valley Road, Pittsburg at 1000 Center Avenue, and a historic courthouse in Martinez at 725 Court Street handling primarily family law matters.

Straight answers

Contra Costa County public-records FAQs

Open only the answer you need.

Where can I find mugshots or booking photos in Contra Costa County, California?

Mugshots or booking photos in Contra Costa County can be obtained from the Contra Costa County Sheriff's Office. While the Sheriff's Office may not provide an online portal for public access to mugshots, you can request them directly from the Records Unit. It's important to note that access to these records may be subject to privacy laws and regulations.

How do I get a criminal background check in Contra Costa County, California?

To obtain a criminal background check in Contra Costa County, you should contact the California Department of Justice (DOJ), which handles statewide background checks. Locally, you can also request a background check through the Contra Costa County Sheriff's Office. You will need to provide fingerprints and pay any applicable fees as part of the process.

How can I look up sex offenders in Contra Costa County, California?

You can look up sex offenders in Contra Costa County by accessing the California Megan's Law website, which is managed by the California Department of Justice. This online registry provides information on registered sex offenders, including their locations and offenses. The website is a valuable resource for keeping informed about sex offenders in your area.

How do I register to vote in Contra Costa County, California?

You can register to vote in Contra Costa County online at registertovote.ca.gov, by mail, or in person at the County Elections Division at 555 Escobar Street in Martinez. The voter registration deadline is 15 days before any election, though California's conditional voter registration allows you to register and vote provisionally through Election Day at designated locations. Once registered, you will automatically receive vote-by-mail ballots for all elections and can track your ballot online at wheresmyballot.sos.ca.gov. Contact the Elections Division at (925) 335-7800 or visit www.cocovote.us for assistance.

How do I look up property records in Contra Costa County, California?

Property records in Contra Costa County are accessible through the County Recorder-Clerk's Office at www.cocorec.com, which offers a free SmartSearch online system for viewing recorded documents including deeds, mortgages, liens, and maps dating back to the 1970s. For property tax assessments, parcel information, and ownership data, visit the Assessor's Office website at www.cccounty.us/assessor, which provides a free Property Information System and interactive GIS mapping. Documents can be viewed online at no charge, with fees of $1.00 per page for printing or downloading unofficial copies, and $11.00 plus $3.00 per additional page for certified copies. The Recorder-Clerk's Office is located at 555 Escobar Street, Martinez, and can be reached at (925) 335-7900.

How do I get a birth or death certificate in Contra Costa County, California?

Birth and death certificates for events occurring in Contra Costa County are available from the County The's Office at 555 Escobar Street, Martinez, CA 94553, phone (925) 335-7900. The fee for a certified copy is $31.00 for the first copy and $27.00 for each additional copy of the same record ordered at the same time. You can request certificates in person (immediate service if available), by mail (10-15 business day processing), or online through VitalChek with additional convenience fees. Valid photo ID and proof of eligibility as an authorized person under California Health and Safety Code Section 103526 are required.

How do I find business license records in Contra Costa County, California?

Business licenses in Contra Costa County are issued by individual cities for businesses within city limits and by the County Department of Conservation and Development at (925) 674-7810 for unincorporated areas. Fictitious business name (DBA) statements are filed with the County The at 555 Escobar Street, Martinez, and indexed in their records system. For formal business entity information including corporations and LLCs, search the California Secretary of State's free online database at www.bizfilesonline.sos.ca.gov, which provides registration status, agent information, and filing history. Contact the specific city or the county's business license office for local licensing requirements and verification.