Madison Correctional Institution (Ohio)


 * not to be confused with the Madison Correctional Institution, Madison, Florida

The Madison Correctional Institution (MaCI) is a state prison for men located in London, Madison County, Ohio. First opened in 1987, the facility has a working population of 2258 inmates, with a mix of security levels (minimum, medium, close, and a few max and super max).

The facility is less than a mile from another Ohio state prison, London Correctional Institution.