Millhaven Institution is a maximum-security prison located in Bath, Ontario, Canada. It was opened in 1971 and is designed to house male inmates who have committed serious offenses. The facility is known for its strict security measures and is part of the Correctional Service of Canada system. The institution has a capacity of approximately 500 inmates and offers various programs aimed at rehabilitation and reintegration into society. It includes educational and vocational training opportunities, as well as mental health services, to support inmates in their personal development while serving their sentences.