Massachusetts Treatment Center is a state prison in Bridgewater, Massachusetts, run by the Massachusetts Department of Correction. The state classifies it as medium security. Federal facility data from 2020 put its capacity at about 667 beds.
Massachusetts Treatment Center Address and Phone
- Facility type
- State prison
- Address
- 30 Administration Rd, Bridgewater, MA 02324Open in Google Maps
- Main phone
- (508) 279-8100
- Operated by
- Massachusetts Department of Correction
- County
- Plymouth County
How to Find an Inmate at Massachusetts Treatment Center
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 Massachusetts Department of Correction and can change at short notice. Read the official facility page and call ahead before you travel.
Jails and Police Near Massachusetts Treatment Center
Anyone arrested near Bridgewater is booked into the county jail first; a state facility only receives people after sentencing, commitment or transfer.
Other State Prisons in Massachusetts
Open status checked against the official mass.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.