Calhoun County Jail
Calhoun County Jail
County Sheriff Lockup / Very Small Jail - 2 Beds; verify actual housing before mailingMailing Address
VERIFY CURRENT CUSTODY BEFORE MAILING. Calhoun County Sheriff's Office / Jail, P.O. Box 635, Hardin, IL 62047.
Physical Address
301 S. County Road, Hardin, IL 62047
Phone
Governing Agency
Calhoun County Sheriff's Office
Inmate ID
Receiving-facility inmate / booking number — Not required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Verify the person's actual holding facility first. If Calhoun County staff confirms local housing and the P.O. Box 635 mail route, use the inmate's full booked name and any assigned identifier.
Source: Official sourceLast verified: September 27, 2026
Confirm the actual holding facility's current photo rules before mailing.
Source: Official sourceLast verified: September 27, 2026
Confirm the actual holding facility's current publication/package rules.
Source: Official sourceLast verified: September 27, 2026
Confirm the actual holding facility's current account/deposit system.
Source: Official sourceLast verified: September 27, 2026
Confirm local vs. out-of-county placement and the receiving facility's visitation policy.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
Calhoun County's current sheriff directory lists only two jail beds. Before mailing, call the Sheriff's Office and confirm whether the person is actually housed locally or has been transferred to another county. Do not assume P.O. Box 635 is the correct personal-mail destination without custody confirmation.
About Calhoun County Jail
The Illinois Sheriffs' Association lists Calhoun County with only two jail beds. The Sheriff's Office is at 301 S. County Road in Hardin.