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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.

• 2 min read Based on general CA policies

Martinez Detention Facility is located at 901 Court Street, Martinez, CA 94553. If you’re heading there in person for any reason, use that address as your starting point and confirm any unit-specific instructions when you speak with staff.

Note: Phone numbers for Martinez Detention Facility vary across official county pages. The facility page lists (925) 335-4600, while the Records & ID Unit page shows (925) 646-4493 for inmate information. Confirm which number is current before relying on it.

Steps to Follow

  • ✓ Use this address for Martinez Detention Facility: 901 Court Street, Martinez, CA 94553.
  • ✓ Call the main number listed on the facility page: (925) 335-4600.
  • ✓ If you’re specifically trying to get inmate information, also try the alternate number listed by the Records & ID Unit: (925) 646-4493.
  • ✓ When you get through, ask staff to confirm you reached the right office for inmate information and verify the best callback number.

Before planning around a call, verify which phone number the facility currently wants families to use. One county page lists (925) 335-4600 for Martinez Detention Facility, while another (Records & ID Unit) directs inmate inquiries to (925) 646-4493. If you reach the wrong desk, ask to be transferred or request the correct number for inmate information.

The street address is 901 Court Street, Martinez, CA 94553. If you're sending mail, confirm the exact format the facility requires. You may need to include a booking number or housing details. A street address alone isn't always enough to ensure mail reaches the right person inside.

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