The Kettle Moraine Correctional Institution is a medium security prison located 10 miles west of Plymouth, Wisconsin. The facility is located off Wisconsin Highway 67 just east of the Sheboygan/Fond du Lac County line.

The institution was opened in 1962 as the Wisconsin School for Boys, a juvenile facility. It was converted to an adult medium security prison in 1974 when Lincoln Hills School was expanded.

• Kettle Moraine Correctional Institution

43°43′03″N 88°09′02″W / 43.71750°N 88.15056°W / 43.71750; -88.15056