Home / California / Contra Costa County / Sheriff & police
39 listed agencies make arrests in Contra Costa County: the sheriff, city police departments, campus police and state agencies. The arresting agency is usually not the facility that holds the person; the county page has the jail.
Booking, bond and release questions go to the jail, not the arresting agency. Confirm where the person is before you act.
The sheriff is usually the police department for unincorporated areas and the operator of the county jail. An arresting station is usually not the holding facility.
Checked Aug 20, 2026 against cocosheriff.org.
Checked Sep 12, 2026 against contracosta.ca.gov.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Walk-in Sheriff offices for a community in this county. After-hours and in-progress calls go through 911.
Also listed: 150 Alamo Plaza # C, Alamo map · (925) 837-2902 (second listing)
Also listed: 5555 Giant Road, Richmond map · (510) 262-4203 (second listing)
Also listed: 1980 Muir Road, Martinez map · (925) 313-2541 (second listing)
Checked Aug 20, 2026 against cocosheriff.org.
These departments police that city. A local arrest still usually books into the county jail.
Also listed: (925) 779-6900 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against antiochca.gov.
Checked Sep 12, 2026 against bart.gov.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Also listed: 9100 Brentwood Boulevard, Brentwood map · (925) 634-6911 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against brentwoodca.gov.
Also listed: 6000 Heritage Trail, Clayton map (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against claytonca.gov.
Also listed: 1350 Galindo Street, Concord map · (925) 671-3220 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against cityofconcord.org.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Also listed: 10900 San Pablo Avenue, El Cerrito map (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against elcerrito.gov.
Also listed: (510) 799-8260 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against herculesca.gov.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Checked Aug 20, 2026 against cityofmartinez.org.
Also listed: (925) 376-2515 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against moraga.ca.us.
Checked Aug 20, 2026 against oakleyca.gov.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Also listed: (510) 724-8950 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against pinole.gov.
Also listed: (925) 252-4980 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against pittsburgca.gov.
Checked Aug 20, 2026 against phillca.gov.
Checked Aug 20, 2026 against ci.richmond.ca.us.
Also listed: 13880 San Pablo Avenue, San Pablo map · (510) 215-3130 (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against sanpabloca.gov.
Also listed: 2220 Camino Ramon, San Ramon map (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against sanramon.ca.gov.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Also listed: 1666 North Main Street, Walnut Creek map (directory inventory, not yet checked against the agency)
Checked Aug 20, 2026 against walnutcreekpdca.gov.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Campus police cover that campus only. Off-campus streets belong to the city police or the Sheriff.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Freeway collisions, traffic stops, and commercial inspection. City streets belong to that city’s police or the Sheriff.
From the law-enforcement directory inventory. Not yet checked against the agency's own page; confirm the number before relying on it.
Checked Aug 20, 2026 against chp.ca.gov.
Jail411 lists the public agencies that make arrests so families can find the right door. We are not a government agency, a police department or a live custody-records service.
Often the sheriff runs the county jail, but the jail is a separate facility with its own address, phone and rules. Open the jail page for booking, visiting, mail and money details.
Ask the person, check any paperwork or citation, or call the sheriff's non-emergency line. City arrests belong to that city's police; unincorporated areas and county roads usually belong to the sheriff; freeways usually belong to the state patrol.
The jail can. The arresting agency may confirm an arrest but does not hold the person. Call the jail's booking or information line first.
Send us the page and the detail that needs attention. Include the agency's official page when you have it. Do not send private booking documents or other sensitive personal information.
Practical guides for calls, visits, mail, money and release.