Contra Costa County Phone Directory

The Contra Costa County phone directory covers court records, inmate data, recorded documents, and property information through several county office databases. Martinez serves as the county seat. Contra Costa County has about 1.1 million residents spread across the East Bay and into the delta region. You can search for people and contact details using the Superior Court portal, the Sheriff's inmate lookup, and the Clerk-Recorder system. Each tool is free to access online. This page gives you the links, phone numbers, and practical tips you need to get results from each Contra Costa County search tool.

Contra Costa County Court Phone Directory

The Contra Costa Superior Court runs a public portal where you can search case records by name or case number. The system covers civil, criminal, family, and probate cases. Copies cost 50 cents per page. Certified copies are $40.00 plus $0.50 per page. You need a valid ID to view any file at the courthouse. That is a rule specific to Contra Costa County. Online access through the portal does not have that same ID rule, so most people start there.

Search the Contra Costa County Court Public Portal to look up cases and find people in the court system.

Court records in Contra Costa County list the parties to each case by full name. Many filings also include addresses. This makes the court portal a useful piece of the Contra Costa County phone directory, especially for civil cases where both sides must file their contact information with the court. The courthouse is at 725 Court Street in Martinez, CA 94553. Call (925) 608-1000 for general information about case records or filing questions.

Under the California Public Records Act, most court records are available to the public. Some cases have sealed portions. AB 1524, effective January 1, 2026, lets anyone use their own camera to photograph electronic court records at the courthouse. This change cuts the cost of getting Contra Costa County phone directory data from court files.

Find People in Contra Costa County Jail

The Contra Costa County Sheriff keeps an inmate lookup tool that shows who is currently in custody. You search by name. The system returns booking data and charges. It runs 24 hours a day. This is a fast way to locate someone through the Contra Costa County phone directory if you believe they may have been arrested.

Use the Contra Costa County Inmate Lookup to check current in-custody reports.

The Sheriff's main office phone is (925) 655-0000. Custody services are available around the clock at (925) 646-4496. Records and ID inquiries go to (925) 335-1570. The inmate lookup updates often, but brand new bookings may take a few hours to show. If you are trying to find someone in the Contra Costa County phone directory and other tools have not worked, the jail roster is worth checking.

Note: The Contra Costa County inmate lookup shows current in-custody status only and does not include historical booking records.

Contra Costa Recorder Phone Directory Resources

The Contra Costa County Clerk-Recorder handles document recording, vital records, and marriage licenses. Recording fees are $14 for the first page plus $3 for each page after that. Documents get recorded within two business days of receipt. The office is at 555 Escobar Street in Martinez, CA 94553. Call 925-335-7900 for questions.

Check the Contra Costa County Recorder Portal for information on recorded documents and vital records services.

Recorded documents include deeds, liens, and other filings that contain the names and addresses of the people involved. These records help with Contra Costa County phone directory searches because they tie people to specific properties. If you know where someone owns property, you can find their likely address and then look up their contact info from there. Marriage records also list both parties and their information at the time of filing, which adds to the data available in the Contra Costa County phone directory.

The Assessor's Office is at 2530 Arnold Drive, Suite 100, Martinez, CA 94553. Call 925-313-7400 for property questions. They maintain over 12,000 maps for assessment purposes. There is no charge for data provided online. The Assessor handles property valuations and ownership data. This is free to search and gives you another way to find people and addresses in Contra Costa County.

State Phone Directory Searches for Contra Costa

State databases round out the Contra Costa County phone directory. The Department of Consumer Affairs license search covers more than 3.4 million licensed professionals in California. You can filter to Contra Costa County to find local license holders in fields like real estate, nursing, and contracting. Each result shows the license status and practice address. The State Bar Attorney Search works for lawyers. Filter by county to see all attorneys in the area.

The Megan's Law database lets you search for registered sex offenders by name, city, or zip code anywhere in Contra Costa County. The California DMV keeps driver and vehicle records you can request for $2.00 online. Call (916) 657-8098 for DMV record requests. The State Controller's PublicPay site shows compensation for government workers in Contra Costa County. All these tools are useful when local databases do not have the phone directory data you need.

Cities in Contra Costa County

These cities in Contra Costa County have their own phone directory pages with local resources. All cities in the county are served by the county court and clerk offices in Martinez.

Nearby County Phone Directory Pages

Contra Costa County borders Alameda County to the south and Sacramento County to the east. Both have their own sets of public record search tools.