FMC Devens
FMC Devens
Federal Medical CenterMailing Address
FMC Devens
P.O. BOX 879
AYER, MA 01432
P.O. BOX 879
AYER, MA 01432
Physical Address
42 Patton Road, Ayer, MA 01432
Phone
Governing Agency
Federal Bureau of Prisons (BOP)
Inmate ID
BOP Register Number — Required
Last Verified
September 23, 2026
Facility Mailing and Service Information
General BOP guidance. Incoming ordinary letters are opened and inspected for prohibited items and security concerns. Local envelope, paper and enclosure requirements must be confirmed with the facility before sending. Legal and other qualifying special mail have separate procedures.
Source: BOP mail and deposit guidance
Source: BOP mail and deposit guidance
Last verified: September 23, 2026
General BOP photo guidance. Personal photos showing nudity or sexually suggestive acts are ordinarily prohibited. Confirm permitted photo size, quantity and print type with the facility; no facility-specific limit has been verified for this page.
Source: BOP Correspondence, section 6(d)(7): BOP correspondence policy (PDF)
Source: BOP Correspondence, section 6(d)(7): BOP correspondence policy (PDF)
Last verified: September 23, 2026
General BOP publication rules. Hardcover publications and newspapers must come from a publisher, book club or bookstore. At medium, high and administrative facilities, the same source restriction applies to softcover publications. At minimum and low security facilities, softcover publications other than newspapers may come from any source. Materials remain subject to review.
Source: BOP publications policy (PDF)
Packages from home require prior written approval and are limited to release clothing and authorized medical devices. Contact the facility before arranging a package.
Source: BOP mail and deposit guidance
Source: BOP publications policy (PDF)
Packages from home require prior written approval and are limited to release clothing and authorized medical devices. Contact the facility before arranging a package.
Source: BOP mail and deposit guidance
Last verified: September 23, 2026
General BOP deposit guidance. Use the BOP instructions for MoneyGram, Western Union or the USPS centralized Lockbox. Do not send funds to the inmate mailing address. Confirm the recipient and current payment instructions before sending money.
Source: BOP mail and deposit guidance
Source: BOP mail and deposit guidance
Last verified: September 23, 2026
General BOP visiting guidance. Obtain approval for the inmate's visiting list and confirm the inmate's current location. Check the facility's visiting policy, schedule and suspension notices before travelling.
Source: BOP visiting guidance
Facility information: Official facility page
Source: BOP visiting guidance
Facility information: Official facility page
Last verified: September 23, 2026
How to Address Your Letter
Use this address format:
[Inmate full name] — [BOP register number]
FMC Devens
P.O. BOX 879
AYER, MA 01432
Confirm the inmate's current location and housing unit before mailing. This page lists the main institution address. For a satellite camp or satellite low-security unit, check that unit's separate mailing address on the official facility page.
Address source: Official facility page
[Inmate full name] — [BOP register number]
FMC Devens
P.O. BOX 879
AYER, MA 01432
Confirm the inmate's current location and housing unit before mailing. This page lists the main institution address. For a satellite camp or satellite low-security unit, check that unit's separate mailing address on the official facility page.
Address source: Official facility page
About FMC Devens
FMC Devens is a Federal Bureau of Prisons medical center in Ayer, Massachusetts. BOP lists inmate-mail routing for the main institution, a minimum-security satellite camp, and a Federal Satellite Low unit. Verify the inmate's current unit before mailing.