Skip to main content
Detention Pipeline
Early Warning
Map
Fights
Pipeline
Investigate
Counties
By State
By Signal Type
Timeline
Players
Network
Facilities
FOIA Generator
Tactics
Help Build
Contribute
Coverage Gaps
Data Sources
Develop
Resources
Methodology
Start Here
Start Here →
Map
Fights
Pipeline
Tactics
Investigate
Counties
By State
By Signal Type
Timeline
Players
Network
Facilities
FOIA Generator
Help Build
Contribute
Coverage Gaps
Data Sources
Develop
Resources
Methodology
Home
/
Facilities
/
Marion USP — Williamson, IL
IGSA Facility
BOP
Active
Marion USP — Williamson, IL
Williamson, IL
FIPS 17199
AOR: Chicago
Rural Rt. 5 Little Grassy Road, Marion, IL
Source:
https://github.com/vera-institute/ice-detention-trends
BOP facility: Marion USP in Williamson County, IL.
Edit
Report issue
County profile
Last updated: Apr 11, 2026