California Men'S Colony (CMC) is a state prison in San Luis Obispo, California, run by the California Department of Corrections and Rehabilitation. The state classifies it as medium security. Federal facility data from 2020 put its capacity at about 3,838 beds.
California Men'S Colony (CMC) Address and Phone
- Facility type
- State prison
- Address
- Colony Drive, San Luis Obispo, CA 93409Open in Google Maps
- Main phone
- (805) 547-7900
- Operated by
- California Department of Corrections and Rehabilitation
- County
- San Luis Obispo County
How to Find an Inmate at California Men'S Colony (CMC)
People serving state sentences are listed in the state's offender search, not on county jail rosters. Search by last and first name, or by the state inmate number if you have it; the result shows where the person is held now, which can change after a transfer.
Visiting, Mail and Phone Calls
Visiting days, visitor approval, dress rules and the mailing format for letters are set by the California Department of Corrections and Rehabilitation and can change at short notice. Read the official facility page and call ahead before you travel.
Jails and Police Near California Men'S Colony (CMC)
Anyone arrested near San Luis Obispo is booked into the county jail first; a state facility only receives people after sentencing, commitment or transfer.
Other State Prisons in California
Open status checked against the official cdcr.ca.gov facility listing in November 2026. Address and phone come from that listing or, where it shows none, from the federal HIFLD prison dataset. This page lists no inmates.