The Ohio State Reformatory, also known as the Mansfield Reformatory, is a historic prison located in Mansfield, Ohio in the United States. It was built between 1886 and 1910 and remained in operation until 1990, when a United States Federal Court ruling ordered the facility to be closed. While this facility was seen in a number of films, TV shows and music videos, it was made famous by the film The Shawshank Redemption when it was used for most scenes of the movie.