St. Clair County Jail
St. Clair County Jail
County Jail / Adult Detention FacilityMailing Address
[Inmate Full Name] — [Inmate ID Number]
St. Clair County Sheriff Department
P.O. Box 247
Phoenix, MD 21131
St. Clair County Sheriff Department
P.O. Box 247
Phoenix, MD 21131
Physical Address
700 N. 5th Street, Belleville, IL 62220
Phone
Governing Agency
St. Clair County Sheriff's Department
Inmate ID
Inmate ID Number — Required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Use inmate full name and ID number, St. Clair County Sheriff Department, P.O. Box 247, Phoenix, MD 21131.
Source: Official sourceLast verified: September 27, 2026
Confirm current St. Clair County photo/content rules before sending images. Do not send irreplaceable originals.
Source: Official sourceLast verified: September 27, 2026
Do not send publications/packages to the digital personal-mail route unless currently authorized.
Source: Official sourceLast verified: September 27, 2026
Use Access Corrections or other current jail-approved deposit methods rather than enclosing funds in personal mail.
Source: Official sourceLast verified: September 27, 2026
Verify current custody, visitor approval/registration requirements and the current visitation or video-visitation schedule before traveling.
Source: Official sourceLast verified: September 27, 2026
How to Address Your Letter
Current digital-mail guidance uses inmate full name and ID number, St. Clair County Sheriff Department, P.O. Box 247, Phoenix, MD 21131. Verify the inmate remains in custody before mailing. Privileged/legal mail uses separate facility procedures.
About St. Clair County Jail
St. Clair County Jail is the county adult detention facility at 700 N. 5th Street in Belleville.