Mid-State Sisters of Skate (MSSOS) is a women's flat track roller derby league based in Stevens Point, Wisconsin.

Mid-State is a member of the Women's Flat Track Derby Association (WFTDA).

[1] Mid-State was founded in June 2010, with practices starting following try-outs in August.

However, it suffered a setback in April 2013 when its winter practice venue closed.

[6][7] Starting in 2015, Mid-State hosts an annual tournament called Uff Da Palooza, attracting teams from Canada and the United States.