Search Martinez Detention Facility Inmates

Martinez Detention Facility Overview

The Martinez Detention Facility is operated by the Contra Costa County Office of the Sheriff. The sheriff describes Martinez as a maximum-security county jail and the primary point of intake for all arrestees booked in Contra Costa County. That role makes it the first place to check after a new arrest in Walnut Creek, Concord, Richmond, Antioch, Martinez, or any other Contra Costa jurisdiction when the person has been taken into county custody.

Martinez opened in 1981 and houses pre-sentenced and sentenced adults who do not qualify for less restrictive environments. The facility provides educational and rehabilitative programming with community organizations. It also provides medical and psychiatric care through physicians, psychiatrists, dentists, nurses, and mental-health clinicians. The facility should not be confused with state prison. A person sentenced to CDCR may disappear from the county jail roster after transfer and must be searched through the state locator.

Martinez Detention Facility Capacity

Research identified a 695 rated-capacity figure for Martinez in BSCC-derived public jail listings, but the current sheriff facility page does not publish a rated bed count. The most current local population source in the research is the sheriff oversight reporting: Martinez averaged 411 people in 2024 and 430 in 2025. Those figures are average daily population, not a live count. A live custody question still belongs in the official locator or with jail staff.

The Martinez count is shaped by arrests, warrants, remands, bail decisions, medical or mental-health needs, and classification decisions. Classification can move a person from Martinez to West County, WRTH, or Marsh Creek after booking. Records may change as those decisions happen, so a record seen in the morning may not match the facility assignment later in the case.

Look Up Martinez Detention Facility Inmates

Use the Contra Costa In-Custody Locator for current Martinez Detention Facility inmate lookup. The locator searches by name or booking number and states that the information shown reflects the most recent information known to the Sheriff's Office. If a person does not appear, the sheriff's notice says to contact the local jurisdiction. For Contra Costa jail custody, the Records & ID page lists Martinez Detention Facility inmate information at (925) 646-4493.

1. Open the official Contra Costa In-Custody Locator.
2. Search by both first and last name, or use the booking number if known.
3. Open the Detail result and check whether Martinez Detention Facility is listed as the facility.
4. Review bail, court date, court location, case number, and charge fields if present.
5. If the person is released, transferred, or sentenced to prison, use In-Custody Reports, Records & ID, the court portal, or CDCR CIRIS.

Martinez Detention Facility Contact

Use the facility phone for general facility contact and the separate inmate information line when the question is custody status. Formal charges and court dates should be checked with Contra Costa Superior Court or the District Attorney, because jail booking charges can change after review by prosecutors.

Martinez Detention Facility Visiting

Social visits are scheduled only by inmates. Visitors must arrive early enough to register, complete the visitor form, present valid photo identification, and pass screening. Visitors and inmates are responsible for conduct. Visits may be terminated, denied, suspended, or restricted for rule violations. The sheriff visitation rules bar phones, pagers, laptops, cameras, recorders, purses, bags, briefcases, food, drink, tobacco, gifts, and physical contact in the visiting area.

Martinez Mail and Money

Non-privileged mail for Martinez uses Pigeonly Corrections. The format is inmate name and booking number, facility name and facility code, then Pigeonly's Las Vegas processing address. Pigeonly scans non-privileged mail and sends a printed copy to the facility. Legal mail follows a separate attorney-authentication process through Pigeonly secure labels. Money orders, cashier's checks, and traveler's checks must be made out to the Office of the Sheriff and include the inmate name and booking number. Personal checks and cash are returned.

Martinez Jail Court Context

Martinez Detention Facility sits close to the Contra Costa County court and records campus, which matters after a booking. The Wakefield Taylor Courthouse and court records location are at 725 Court Street, and the A.F. Bray Courthouse is nearby on Ward Street. A person booked into Martinez may have a first appearance, later criminal case filings, court-copy requests, and custody hearings tied to the same Martinez civic area. Jail records and court records remain separate systems. The jail locator can show current custody, bail, court date, court location, and charge lines when available. The court portal or criminal-record request forms are the source for formal filings, dispositions, and certified copies.

Families often move between three questions at once: whether the person is in jail, what charges have been filed, and where a visit or bond step happens. For Martinez, start with the jail locator for custody, then use the court or District Attorney for formal charge status. Records & ID routes police reports, warrants, and out-of-custody inmate inquiries for sheriff jurisdictions. That split prevents the common mistake of treating a booking line as the final court outcome.

Martinez Booking and Intake

Martinez is the main booking location for Contra Costa arrestees. Intake starts with transport to jail, identity processing, booking record creation, fingerprint review, and warrant checks. The Identification Unit processes Live Scan arrest submissions around the clock and sends identity discrepancies back to the arresting agency. Public records may show booking number, date in, case type, warrant fields, bail fields, and charges. California Penal Code section 825 generally requires an arrested person to be brought before a magistrate without unnecessary delay and within 48 hours, excluding Sundays and holidays, but timing depends on release, warrants, court calendars, and holidays.