The Mid-State Sisters of Skate (MSSOS) is a roller derby league based in Stevens Point, Wisconsin. Founded in 2010, the league consists of two travel teams and two home league teams.
Mid-State was founded in June 2010, with practices starting following try-outs in August. It played its first public bout in June 2011, and by 2013 was attracting up to 200 fans to each bout. However, it suffered a setback in April 2013 when its winter practice venue closed.