Williamson County Jail
Williamson County Jail
County Correctional Center / Adult JailMailing Address
[Inmate Full Name]
Williamson County Sheriff's Office
404 N. Van Buren Street
Marion, IL 62959
Williamson County Sheriff's Office
404 N. Van Buren Street
Marion, IL 62959
Physical Address
404 N. Van Buren Street, Marion, IL 62959
Phone
Governing Agency
Williamson County Sheriff's Office
Inmate ID
Inmate / Booking Number if assigned — Not required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Use the inmate's full name, Williamson County Sheriff's Office, 404 N. Van Buren, Marion, IL 62959.
Source: Official sourceLast verified: September 27, 2026
Confirm current Williamson County photo/content restrictions before mailing. Originals may be retained in inmate property.
Source: Official sourceLast verified: September 27, 2026
Confirm current publication/package rules before ordering or shipping.
Source: Official sourceLast verified: September 27, 2026
Use current Williamson County approved inmate-account methods rather than enclosing cash in ordinary correspondence.
Source: Official sourceLast verified: September 27, 2026
Verify current custody and Williamson County visitation procedures before traveling.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
Current Williamson County policy directs non-legal mail to the inmate's name, Williamson County Sheriff's Office, 404 N. Van Buren, Marion, IL 62959. Mail is scanned and delivered electronically; originals are placed in the inmate's property. Do not use the older Highland Heights address.
About Williamson County Jail
Williamson County Correctional Center is operated from the Sheriff's Office complex at 404 N. Van Buren Street in Marion.