About Contra Costa County
Contra Costa County is located in the San Francisco Bay Area of Northern California, covering approximately 804 square miles of diverse terrain from the San Francisco Bay shoreline through rolling hills to the Sacramento-San Joaquin River Delta. Contra Costa County Seat is Martinez, situated along the Carquinez Strait. With a population exceeding 1.15 million residents as of recent census estimates, Contra Costa is the ninth-most populous county in California.
- Contra Costa County includes 19 incorporated cities including Richmond, Concord, Antioch, Walnut Creek, and San Ramon, along with numerous unincorporated communities.
- Major landmarks include Mount Diablo, rising 3,849 feet and visible from much of the Bay Area; the John Muir National Historic Site in Martinez; and the sprawling East Bay Regional Park District lands.
- Contra Costa County was established in 1850 as one of California's original 27 counties, its name meaning 'opposite coast' in Spanish, referring to its position across the bay from San Francisco.
- Contra Costa County Recorder's office is located at 555 Escobar Street in Martinez, responsible for recording property documents and maintaining official records.
- Contra Costa County Clerk-Recorder manages vital records, marriage licenses, and business name filings from the same location.
Sheriff, Police & Law Enforcement
Sheriff & Law Enforcement
Contra Costa County Sheriff's Office is responsible for law enforcement in the unincorporated areas of Contra Costa County. It operates Contra Costa County jail, processes arrests, and maintains criminal records. The office is also involved in various community programs and initiatives meant to crime prevention and public safety. Notable divisions within the sheriff's office include the Investigation Division, which handles major crimes, and the Custody Services Bureau, which manages the detention facilities.
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. Each city department is responsible for policing within its respective city limits, while the sheriff's office handles law enforcement in unincorporated areas. These agencies often collaborate on major crimes and regional safety initiatives to ensure full public safety coverage across Contra Costa County.
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.
- Inmates can be located through the Sheriff's Office website at www.cocosheriff.org using the Inmate Locator tool, which provides booking information, charges, bail amounts, and custody status.
- Citizens may request arrest records from the arresting agency or the Sheriff's Office by submitting a written public records request.
- Mugshots and booking photos are typically available through the Sheriff's Office Inmate Locator system and may also be requested directly from the detention facilities.
ette Police Department, Martinez Police Department, Moraga Police Department, Oakley Police Department, Orinda Police Department, Pinole Police Department, Pittsburg Police Department, Pleasant Hill Police Department, Richmond Police Department, San Pablo Police Department, San Ramon Police Department, and Walnut Creek Police Department. 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. Some third-party websites aggregate booking photos, though official sources are recommended for accuracy.
general inquiries.
Criminal, Arrest & Jail Records
Criminal Records
The criminal records ecosystem in Contra Costa County includes records of felonies, misdemeanors, traffic violations, and the sex offender registry. These records are maintained by Contra Costa County Superior Court and the sheriff's office. Residents can run a background check through the California Department of Justice, which provides statewide criminal history information. The California Department of Justice offers additional resources for accessing criminal records, so that residents have full access to necessary legal information.
Arrest Records
Arrest records in Contra Costa County are maintained by Contra Costa County Sheriff's Office and local police departments. These records can be requested by residents and attorneys through the appropriate law enforcement agency. Arrest records typically include information such as the individual's name, date of arrest, charges, and booking details. Under the California Public Records Act, these records are accessible to the public, although certain restrictions may apply to protect privacy and ongoing investigations.
Jail & Inmate Records
The main jail facility in Contra Costa County is the Martinez Detention Facility. This facility handles the booking process for people arrested within Contra Costa County, where they are processed and held until they post bail or appear in court. Inmate lookup services are available online, allowing the public to search for current detainees. Visitation rules at the Martinez Detention Facility require scheduling in advance, and visitors must adhere to strict guidelines.
- The bond and bail process in California allows for the posting of bail through cash, bond, or property, and information on recently arrested individuals can be accessed through the sheriff's office website.
Mugshots & Booking Photos
Mugshots in Contra Costa County are taken and retained by Contra Costa County Sheriff's Office during the booking process. These photos are part of the public record and can be searched through the sheriff's office website or by submitting a formal request. California does not have specific mugshot removal laws, but individuals may petition for removal or sealing of records under certain circumstances, such as expungement or dismissal of charges.
Courts & Case Records
The Superior Court of California, County of Contra Costa, is the unified trial court serving Contra Costa County with jurisdiction over all criminal, civil, family, probate, juvenile, and traffic matters. 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.
- The court's case information and online services can be accessed at www.cc-courts.org, where the public can search civil, criminal, family, probate, and traffic case records through the Case Search portal.
- Civil case search fees are typically $5.00 per name searched, though online access may be free for basic case information.
- The court's Records Division in Martinez processes requests for certified copies of court documents at $15.00 for the first page and $0.50 for each additional page.
- The court provides public terminals at each courthouse location for in-person research during regular business hours, typically 8:00 AM to 4:00 PM weekdays.
Property & Public Records
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 office records and preserves documents including grant deeds, deeds of trust, reconveyances, liens, easements, maps, and other instruments affecting real property.
- Documents can be viewed, printed, or downloaded for a fee of $1.00 per page.
- Official certified copies are available for $11.00 for the first page and $3.00 for each additional page.
- The office accepts requests in person, by mail, or through the online ordering system.
- 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's GIS portal provides interactive mapping with parcel boundaries, zoning information, and property characteristics.
The Recorder-Clerk's website at www.cocorec.com offers a full online search system called SmartSearch, which provides free public access to recorded documents dating back to the 1970s, with index information available for older records. The Assessor maintains property assessment rolls, ownership information, and parcel maps accessible through the online Property Information System at www.cccounty.us/assessor. The Treasurer-Tax Collector's Office at 625 Court Street, Martinez, handles property tax payments and maintains tax sale records, accessible at www.cctax.us.
All property related records are public under California Government Code Section 6253 unless specifically exempted.
Vital Records
Vital records for Contra Costa County residents are maintained by Contra Costa County Clerk-Recorder's Office at 555 Escobar Street, Martinez, CA 94553. Birth certificates for births occurring in Contra Costa County from July 1906 forward can be obtained from the County Clerk-Recorder; the fee is $31.00 for a certified copy with additional copies of the same record costing $27.00 each. Processing time is typically 10-15 business days for mail requests and immediate for in-person requests if the record is readily available.
- Death certificates are also available from the County Clerk-Recorder for deaths occurring in Contra Costa County; fees are identical to birth certificates at $31.00 for the first certified copy.
- Divorce records (marriage dissolution decrees) are maintained by the Superior Court of California, County of Contra Costa, not the Clerk-Recorder.
- Online ordering of certified vital records is available through Contra Costa County's VitalChek service, though additional convenience fees apply.
Authorized applicants must provide valid government-issued photo identification and demonstrate a direct and tangible interest in the record as required by California Health and Safety Code Section 103526. Marriage licenses are issued by the County Clerk-Recorder at the Martinez office and satellite locations; the fee is $108.00 for a public marriage license or $119.00 for a confidential marriage license, with certified copies available for $17.00. For vital records older than county records or when Contra Costa County of event is unknown, the California Department of Public Health Vital Records Office in Sacramento can be contacted at or online at www.cdph.ca.gov/Programs/CHSI/Pages/Vital Records.aspx.
Walk-in service is available at the Martinez office Monday through Friday, 9:00 AM to 4:00 PM, excluding county holidays.
Business & Licensing
Business licensing in Contra Costa County varies by jurisdiction, with incorporated cities managing their own business license programs and Contra Costa County managing licenses for unincorporated areas. Contra Costa County Department of Conservation and Development issues business licenses for unincorporated county areas; applications and information are available at 30 Muir Road, Martinez, CA 94553 (phone: 925-674-7810).
- This free database provides information on business entity names, registration dates, status, agent for service of process, and formation documents.
Contra Costa County Clerk-Recorder at 555 Escobar Street, Martinez, processes fictitious business name (DBA) filings required under California Business and Professions Code Section 17900; the filing fee is approximately $35.00 plus newspaper publication costs. All California business entity filings including corporations, limited liability companies, limited partnerships, and other formal business structures are registered with the California Secretary of State, searchable online at www.bizfilesonline.sos.ca.gov. Professional and occupational licenses are generally issued by state boards and departments, while sellers' permits for sales tax collection are obtained through the California Department of Tax and Fee Administration.
Building permits, planning approvals, and zoning information for unincorporated areas are handled by the Department of Conservation and Development at the Martinez location. Each incorporated city maintains its own building and planning departments. Contra Costa County Economic Development Association can be contacted through the office’s website. business resources, and local chambers of commerce include Contra Costa County Business to Business Alliance, Walnut Creek Chamber of Commerce, Concord Chamber of Commerce, and chambers in most incorporated cities, providing networking and business development support.
Elections & Voter Records
Elections in Contra Costa County are administered by Contra Costa County Elections Division, part of the County Clerk-Recorder's Office, located at 555 Escobar Street, Martinez, CA 94553. The Elections Division can be reached at and maintains a full website at www.cocovote.us with voter information, election results, and online services.
- In the November 2024 general election, Contra Costa County reported approximately 68% voter turnout among registered voters, reflecting high engagement typical of presidential election years in the Bay Area.
- Vote-by-mail ballots for registered voters are automatically sent beginning 29 days before each election.
- Any registered voter can track their ballot status through the California 'Where's My Ballot?' system at wheresmyballot.sos.ca.gov.
- Citizens may request copies of election materials, precinct results, and historical data from the Elections Division.
California voters can register online through the California Secretary of State's website at registertovote.ca.gov; the deadline to register for any election is 15 days before Election Day, though California offers conditional voter registration allowing eligible citizens to register and vote provisionally through Election Day at designated locations. Contra Costa County voters can find their polling place, vote center, or ballot drop-box location by visiting Contra Costa County elections website and entering their address, or by checking the sample ballot mailed to all registered voters before each election. California is a Vote-By-Mail state, and all registered voters automatically receive mail ballots; voters may return ballots by mail (postage-paid), at official drop boxes throughout Contra Costa County, or in person at vote centers.
Election records available to the public include the voter registration roll (with certain personal information redacted per California Elections Code Section 2194), campaign finance disclosure forms filed with Contra Costa County and accessible through the Elections Division, candidate filing documents, precinct-level election results, and historical election data. The next major election is the November 3, 2026 General Election, featuring U.S. House of Representatives races, one U.S.
Senate seat, California statewide constitutional officers including Governor, and state legislative seats, plus local measures and offices. California Elections Code Section 2188 and Government Code Section 6250 govern public access to election records, for public access while protecting voter privacy.
Economy & Demographics
Contra Costa County's economy is among the most strong and diverse in California, with a 2022 median household income estimated at approximately $110,000, well above the state and national averages. Contra Costa County's strategic location in the San Francisco Bay Area positions it as a major hub for healthcare, technology, professional services, energy, and advanced manufacturing.
- Contra Costa County's unemployment rate typically tracks slightly below state averages, hovering around 3-4% in recent years.
- Contra Costa County benefits from proximity to Silicon Valley, San Francisco's financial sector, and major transportation infrastructure including BART, Interstate 80, Interstate 680, and Highway 4.
Major employers include Chevron Corporation, headquartered in San Ramon with refinery operations in Richmond; Kaiser Permanente, operating multiple medical centers and employing thousands; John Muir Health, with facilities in Walnut Creek and Concord; the County of Contra Costa itself; and numerous technology companies in the I-680 corridor including 24 Hour Fitness headquarters and major corporate offices in San Ramon's Bishop Ranch business park. The western county industrial corridor supports petroleum refining, chemical manufacturing, and maritime shipping through the Port of Richmond. The central county concentrates retail, healthcare, and professional services, while eastern communities have seen rapid growth in residential development and commercial services.
Agriculture remains economically significant in eastern areas, particularly around Brentwood and Oakley, known for premium corn, wine grapes, and specialty crops. Major economic development initiatives include redevelopment of the Concord Naval Weapons Station into a mixed-use community, expansion of biotechnology research facilities, and renewable energy projects.
Transparency Score
Court Records: Yes: Online | Property: Yes: Free Search | Arrest/Jail: Yes: Online Inmate Lookup | Vital Records: Yes: In-Person & Online Orders | Business: Yes: Online (State & County) | Elections: Yes: Online | Overall Score: 9/10, Contra Costa County provides excellent digital access to public records with online portals for most record types, though some certified documents require in-person or mail requests.
Official Government Resources
Frequently Asked Questions
How can I search for someone recently arrested in Contra Costa County, California?
Where can I find mugshots or booking photos in Contra Costa County, California?
How do I get a criminal background check in Contra Costa County, California?
How can I look up sex offenders in Contra Costa County, California?
How do I register to vote in Contra Costa County, California?
How do I look up property records in Contra Costa County, California?
How do I get a birth or death certificate in Contra Costa County, California?
How do I find business license records in Contra Costa County, California?
Cities & Towns in Contra Costa County
Explore public records for 27 cities and communities in Contra Costa County, California.