Madison Correctional Institution is a state prison in London, Ohio, run by the Ohio Department of Rehabilitation and Correction. The state classifies it as medium security. Federal facility data from 2020 put its capacity at about 2,477 beds.
Madison Correctional Institution Address and Phone
- Facility type
- State prison
- Address
- 1851 State Route 56, London, OH 43140Open in Google Maps
- Main phone
- (740) 852-9777
- Operated by
- Ohio Department of Rehabilitation and Correction
- County
- Madison County
How to Find an Inmate at Madison Correctional Institution
People serving state sentences are listed in the state's offender search, not on county jail rosters. Search by last and first name, or by the state inmate number if you have it; the result shows where the person is held now, which can change after a transfer.
Visiting, Mail and Phone Calls
Visiting days, visitor approval, dress rules and the mailing format for letters are set by the Ohio Department of Rehabilitation and Correction and can change at short notice. Read the official facility page and call ahead before you travel.
Jails and Police Near Madison Correctional Institution
Anyone arrested near London is booked into the county jail first; a state facility only receives people after sentencing, commitment or transfer.
Other State Prisons in Ohio
Open status checked against the official drc.ohio.gov facility listing in November 2026. Address and phone come from that listing or, where it shows none, from the federal HIFLD prison dataset. This page lists no inmates.