Martinez inmate search and jail information

Martinez is Contra Costa County's county seat. If you are trying to locate someone after an arrest in Martinez, begin by confirming the arrest location and the agency involved. A home address in Martinez does not establish which agency currently holds the person. The county custody resource below is maintained by Contra Costa County Office of the Sheriff; this website does not hold inmate records.

Contra Costa County spans Richmond's shoreline, the central communities of Concord and Walnut Creek, and the eastern cities of Antioch, Pittsburg, and Brentwood. Its detention system has more than one location, so the arrest city is not enough to choose a visiting destination. The Office of the Sheriff's inmate-information page links the official in-custody locator, reports, and separate guidance for visits, mail, and deposits. Begin there to avoid confusing an arrest report with a current housing record.

Martinez, West County, and Marsh Creek serve different detention roles, and an individual's assignment can change. Record the booking identifier and verify the current facility before arranging travel across the county. A person arrested by a city police department may not appear in the county system until intake is completed. Similarly, a court appearance in Martinez does not establish where that person will sleep afterward. Contra Costa Superior Court maintains its own case records and hearing assignments, separate from the sheriff's custody tools. If the locator returns similar names, compare available identifying details and do not infer identity from a surname alone. A release entry, transfer, or missing result needs context from the holding agency; the public portal is neither a complete arrest history nor a finding about the underlying allegations.

For a search connected with Martinez, keep the person's legal name, date of birth, arrest location and any booking number together. If the county information does not establish a match, ask the arresting agency whether booking is pending, whether the person was released, or whether another jurisdiction took custody. Do not interpret a missing record as confirmation that no arrest occurred.

How to search for someone in custody

Start with the custody information published by the Contra Costa County Office of the Sheriff. Have the person's full legal name and, ideally, a date of birth ready. If an online lookup is available, compare identifying details rather than relying on a name alone. If you obtain a booking number, keep it with your notes for later questions to jail staff, the court, or an attorney.

Official inmate search (external site).

Jail facilities

These are Contra Costa County custody facilities, not a claim that Martinez has its own jail. Confirm the person's current housing assignment before traveling; the nearest building may not hold them.

• Martinez Detention Facility, 1000 Ward Street, Martinez, CA 94553
• West County Detention Facility, 5555 Giant Highway, Richmond, CA 94806
• Marsh Creek Detention Facility, 12000 Marsh Creek Road, Clayton, CA 94517

Visiting, phone calls and mail

Confirm which Contra Costa detention facility currently houses the person, then follow that facility's booking and visitor-approval requirements through the sheriff. Do not apply Martinez instructions automatically to Richmond or Marsh Creek. Recheck availability before departure, and use the jail's current mail-routing and communication instructions rather than the sheriff's administrative address.

Court and bail

Criminal cases here are handled by the Superior Court of California, County of Contra Costa (Wakefield Taylor Courthouse, 725 Court Street, Martinez, CA 94553).

Contra Costa Superior Court's current bail schedule is subject to case-specific judicial decisions. Ask the court or Probation about pretrial services, assessment, and release supervision. Before posting money or a surety bond, confirm with the sheriff which detention intake or release counter handles that person's case; a housing address alone may not identify the correct payment point.

Common questions

Official sources and record limitations

This guide links to Contra Costa County Office of the Sheriff for custody procedures and Superior Court of California, County of Contra Costa for court information. A booking record is not a conviction. Recent bookings, transfers, releases and protected records may not appear in a public lookup.