The Redgranite Correctional Institution is a medium security adult male correctional institution located in Redgranite, Wisconsin, in the United States. The prison is operated by the Wisconsin Department of Corrections. Groundbreaking occurred on June 18, 1999, and it opened on January 8, 2001. Boldt Construction Company built it for the state at a cost of $52.9 million. The prison encompasses 89 acres of land, 22 acres of which are within the perimeter. Demographics The operating capacity of the prison is 990. As of June 30, 2022, the prison held 980 prisoners. References External links Redgranite Correctional Institution from the Wisconsin Department of Corrections Prisons in Wisconsin Buildings and structures in Waushara County, Wisconsin 2001 establishments in Wisconsin