Martinez Detention Facility
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Guides for This Facility
How to Contact an Inmate at Martinez Detention Facility (CA)
Trying to reach someone at Martinez Detention Facility? Start with the facility's address and phone number below, but be aware that different county pages list different phone numbers for inmate information.
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How to Send Money to Someone at Martinez Detention Facility (money orders, SmartDeposit & lobby kiosks)
Getting money onto someone's account is straightforward once you know the right payment type and how to fill it out. Here's what Martinez Detention Facility accepts—and the details that keep your deposit from being delayed or returned.
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How Visiting Works at Martinez Detention Facility: Scheduling, Arrival Times, and Visitor Limits
Visiting someone at Martinez Detention Facility goes smoother when you understand the scheduling process, visitor limits, and the strict 30-minute timing rules. Here's what you need to know so you don't get turned away at the door.
Read GuideAt a Glance
Visitation
- Social visits at Martinez Detention Facility are scheduled only by the inmate.
- An inmate may have up to four visitors at one time, and all visitors must be scheduled.
- Registration begins 30 minutes before a visiting block and visitors must enter no later than 30 minutes before the end of any visiting block.
Communication
- Martinez Detention Facility street address is listed as 901 Court Street, Martinez, CA 94553.
- The facility page lists a main phone number for Martinez Detention Facility at (925) 335-4600.
- Records & ID Unit is listed at 2530 Arnold Drive, Suite 170 with weekday hours (Monday–Friday 8 AM–5 PM) and its own office contact info.
Sending Money
- Martinez Detention Facility accepts only money orders or cashier's checks for mailed inmate deposits; personal checks or cash will be returned to the sender.
- Money orders, cashier's checks, and traveler's checks must be made out to the Office of the Sheriff and include the inmate's name and booking number; items not properly made out will be sealed in property.
- Credit and debit cards are accepted only via kiosks in the lobbies, by telephone at 1-866-0460, or online at www.smartdeposit.com.
Based on official sources and community feedback. Learn how we verify
Topic Overviews
Visitation
Martinez Detention Facility posts visiting blocks with specific days and times on its facility page. Check there for the current schedule before planning your trip. Only the incarcerated person can schedule social visits, and each inmate may have up to four visitors at one time. All visitors must be scheduled. Registration opens 30 minutes before a visiting block starts, and you must enter no later than 30 minutes before the block ends. The Facility Commander can exclude visitors for prior misconduct and is the only official who may suspend visiting privileges (the Classification Unit is notified of suspensions). The Office of the Sheriff may use video-recording devices in visiting areas, except during confidential attorney consultations. Rule violations can lead to your visit being ended or your privileges being limited or denied.
Read full guideCommunication
To reach Martinez Detention Facility, start with the main contact line listed for the jail. The address is 901 Court Street, Martinez, CA 94553. The department also has a separate Records & ID office at 2530 Arnold Drive, Suite 170, open Monday to Friday, 8 AM to 5 PM. Use that office when seeking records or certain inmate information. For remote communication, create an account on the department's communications platform (web or mobile) and add prepaid funds for video or messaging services. Some facilities may still be transitioning platforms. During in-person visits, be aware that visiting areas may be video-recorded, except for confidential attorney consultations.
Read full guideSending Money
Martinez Detention Facility accepts mailed deposits only as money orders or cashier's checks. Cash or personal checks will be returned to the sender. Make money orders, cashier's checks, or traveler's checks payable to the Office of the Sheriff and include the inmate's full name and booking number. If it's not filled out correctly, it will be sealed in the inmate's property instead of deposited. For credit or debit card deposits, use the kiosks in the facility lobbies, call 1-866-0460, or go online at www.smartdeposit.com. Double-check the inmate's name and booking number and follow the vendor's posting instructions to help the money post correctly and quickly.
Read full guideCommon Questions
Showing 6 of 9How do I schedule a visit at Martinez Detention Facility?
Only the incarcerated person can schedule social visits. You cannot book one yourself. Check the Martinez Detention Facility page for posted visiting blocks with days and times, then use the facility's listed process for booking.
VisitationWhat are the visitor limits and arrival rules for visits at Martinez Detention Facility?
An inmate may have up to four visitors at one time, and all visitors must be scheduled. Registration opens 30 minutes before a visiting block, and you must enter no later than 30 minutes before the block ends.
VisitationCan visits be recorded, and what can cause a visit to be denied or suspended?
Yes, the Office of the Sheriff may use video-recording devices in visiting areas, except during confidential attorney consultations. The Facility Commander may exclude visitors for prior misconduct, and violations of visiting rules can result in termination, suspension, restriction, revocation, arrest, or denial of visiting; only the Facility Commander may suspend visiting privileges.
VisitationHow can I call or video-chat with an inmate at Martinez Detention Facility?
Use the department’s communications platform to set up video or messaging: create an account on the website or mobile app, then add prepaid funds if required. For facility-specific issues, call the phone numbers listed on the Martinez Detention Facility pages.
CommunicationWhat phone number should I call for inmate information at Martinez Detention Facility?
The main line is (925) 335-4600. For inmate information and records, you may also see (925) 646-4493 or a separate Records & ID office line listed. Check both if you're not getting the help you need.
CommunicationAre visiting areas or communications recorded at Martinez Detention Facility?
Yes, the Office of the Sheriff may use video-recording devices in visiting areas, except where attorney consultations are confidential. If privacy is a concern, ask staff about recording practices before your visit.
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Did You Know?
Martinez Detention Facility (MDF) in California is a maximum security facility and the primary intake point for arrestees booked in Contra Costa County.
This guide is based on feedback from 65 families and official facility documentation. Learn how we verify