MASAC at Plymouth
MASAC at Plymouth
State Secure Substance Use Treatment FacilityMailing Address
[Patient / Resident Full Name] — [ID if known]
MASAC at Plymouth
Myles Standish State Forest
P.O. Box 207
South Carver, MA 02366
MASAC at Plymouth
Myles Standish State Forest
P.O. Box 207
South Carver, MA 02366
Physical Address
Myles Standish State Forest, 1 Bump Pond Road, Plymouth, MA 02360
Phone
Governing Agency
Massachusetts Department of Correction
Inmate ID
Commitment / Patient ID — Not required
Last Verified
September 27, 2026
Facility Mailing and Service Information
MASAC at Plymouth is the current facility at the former MCI-Plymouth site. Use P.O. Box 207, South Carver, MA 02366 for mail and include the resident/patient's full name and ID if known.
Source: Official sourceLast verified: September 27, 2026
Photos are subject to MASAC and Massachusetts DOC content/security rules.
Source: Official sourceLast verified: September 27, 2026
Verify current MASAC publication/package rules before sending books or packages.
Source: Official sourceLast verified: September 27, 2026
Use only approved MASAC/DOC deposit procedures; do not send cash.
Source: Official sourceLast verified: September 27, 2026
Appointments and background screening are required; verify the current MASAC schedule.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
MASAC at Plymouth is the current facility at the former MCI-Plymouth site. Use P.O. Box 207, South Carver, MA 02366 for mail and include the resident/patient's full name and ID if known.
About MASAC at Plymouth
MASAC at Plymouth is an active secure treatment facility at Myles Standish State Forest serving court-committed men for substance-use treatment.