The United States Penitentiary (USP) in Marion, Illinois, currently houses medium security male inmates. The facility also has an adjacent satellite prison camp that houses minimum security male offenders.

USP Marion is located approximately 9 miles south of the city of Marion, 300 miles from Chicago, and 120 miles from St. Louis, Missouri.

Judicial District: Southern Illinois

*Although designed as a USP and the facility’s official name continues to refer to it as such, this institution underwent institution population changes to accommodate the agency’s bed space capacity, security level, and population management needs. This institution presently houses medium security inmates and operates accordingly.