The Sioux Falls Roller Dollz (SFRD) is a roller derby league based in Sioux Falls, South Dakota. Founded in 2006, the league currently consists of two teams, and two mixed teams which compete against teams from other leagues. The Roller Dollz joined the Women's Flat Track Derby Association, playing their first sanctioned bout against the North Star Rollergirls in January 2009. By May 2011, the Dollz had raised an estimated $40,000 for local charities. In late 2011, they toured to England, to play the London Rollergirls, Central City Rollergirls and Lincolnshire Bombers Roller Girls.