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County of Illinois, United States

Williamson County

This page lists 3 places of detention and 13 law enforcement agencies in Williamson County, Illinois. They include 11 police departments, 2 federal prisons and 1 county jail. Every entry comes with a telephone number, so you can contact the facility directly. Williamson County is one of 102 counties of Illinois with entries in the atlas.

Interactive map

Map of Williamson County

Every point is a facility. Select one to open its record.

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Prisons & jails

3 facilities

3 entries
USP MarionFederal prisonMarion(618) 964-1441—
USP Marion CampFederal prisonMarion(618) 964-1441—
Williamson County JailCounty jailMarion(618) 997-6541244
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Police & law enforcement

13 agencies

13 entries
Questions

Frequently asked

How many places of detention does Williamson County, Illinois have?

The atlas lists 3 prisons, jails and detention centres in Williamson County, Illinois, including 2 federal prisons and 1 county jail.

Which police agencies serve Williamson County, Illinois?

13 police units are listed for Williamson County, Illinois: 11 police departments, 1 special jurisdiction police and 1 sheriff's office.

How do I find out if someone is in jail in Williamson County, Illinois?

Call the county jail or use the sheriff's online inmate lookup. Official agency records are the final authority on custody status.

Are telephone numbers available for these facilities?

Yes for 16 entries of 16. Where a number is missing, the facility page shows its address and map location; details can change, so the agency's own website is the authority.

What other areas are in Illinois?

Illinois has 101 other areas in the atlas; Cook County has the most entries (179), followed by Lake County.

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