Top 10 Ohio Prisons by Prison Population

COLUMBUS, Ohio — Of the 43,200 inmates in state prisons, Allen-Oakwood Correctional Institution in Lima has the most: 3,513.

That’s according to the latest state prison census, which was released on Tuesday.

There are 28 state prisons in Ohio, all under the Ohio Department of Rehabilitation and Correction. The department oversees the operations of all but three – in Youngstown, Marion County and Conneaut – which are run by private prison corporations.

Allen-Oakwood Correctional Institution, which opened in 1988, is a minimum and medium security prison for men. It has a residential drug treatment unit. As of Tuesday, a total of 123 of its inmates were receiving treatment in the unit.

Below are the other nine largest state prisons by prison population.

2. Richland Correctional Institute in Mansfield: 2,436

3. Chillicothe Correctional Institution in Ross County: 2,366

4. Mansfield Correctional Institution: Total: 2,322

5. Noble Correctional Facility in Noble County: 2,318

6. North Central Correctional Complex, a private jail in Marion County: 2,290

7. Ohio Women’s Reformatory in Marysville: 2,239

8. Marion Correctional Facility in Marion County: 2,190

9. Lorain Correctional Facility in Grafton: 1,944

10. Madison Correctional Facility in Madison County: 1,832

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