St. Clair County Jail
St. Clair County Jail
County Jail / Adult Detention FacilityMailing Address
[Inmate / Resident Full Name]
St. Clair County Jail
P.O. Box 546, Osceola, MO 64776
St. Clair County Jail
P.O. Box 546, Osceola, MO 64776
Physical Address
360 Chestnut Street, Osceola, MO 64776
Governing Agency
St. Clair County Sheriff's Office
Inmate ID
Inmate / Booking ID — Not required
Last Verified
September 27, 2026
Facility Mailing and Service Information
Use the incarcerated person's full legal name and a complete sender return address. Verify current St. Clair County Jail mail rules before sending correspondence.
Last verified: September 27, 2026
Verify current photo size, quantity and content restrictions before sending photographs.
Last verified: September 27, 2026
Verify current book, publication and package rules before sending.
Last verified: September 27, 2026
Do not mail cash unless explicitly permitted. Use the facility's current approved inmate-account deposit method.
Last verified: September 27, 2026
Verify current visitor approval, identification and scheduling requirements before travel.
Last verified: September 27, 2026
How to Address Your Letter
Use the incarcerated person's full legal name and a complete sender return address. Verify current St. Clair County Jail mail rules before sending correspondence.
About St. Clair County Jail
St. Clair County Jail is a Missouri county, juvenile or detention facility record reviewed for current status and mail routing on 2026-09-27.