FCI Marion
FCI Marion
Federal Correctional Institution - Medium SecurityMailing Address
FCI Marion
P.O. BOX 1000
MARION, IL 62959
P.O. BOX 1000
MARION, IL 62959
Physical Address
4500 Prison Road, Marion, IL 62959
Phone
Governing Agency
Federal Bureau of Prisons (BOP)
Inmate ID
BOP Register Number — Required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Use the inmate's full committed/legal name and BOP Register Number and the exact facility/unit mailing address. Include the sender's complete return name and address.
Source: Official sourceLast verified: September 27, 2026
BOP correspondence rules apply to personal photographs. Nudity, sexually explicit material and content that threatens institutional security may be rejected. Confirm any current local quantity/size limits before sending valuable originals.
Source: Official sourceLast verified: September 27, 2026
BOP publication and package rules apply. Hardcover publications and newspapers must come from a publisher, book club or bookstore. Other source requirements depend on security level and current BOP policy. Packages from home generally require prior approval.
Source: Official sourceLast verified: September 27, 2026
Do not send inmate funds to the institution's inmate-mail address. BOP directs mailed inmate funds through its centralized processing center in Des Moines, Iowa and also supports approved electronic deposit methods.
Source: Official sourceLast verified: September 27, 2026
The visitor must be approved on the inmate's visiting list. Confirm the inmate's current location and the facility's current visiting schedule/regulations before traveling.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
Verify the inmate's current BOP location before mailing. Use the inmate's full committed/legal name and BOP Register Number exactly as shown by BOP. Use the mailing address in this record. Do not send inmate funds to the institution address.
About FCI Marion
The former USP Marion was officially renamed FCI Marion after BOP approved a name change to match its current medium-security mission. It has an adjacent minimum-security satellite camp.