The Mid Michigan Derby Girls (MMDG) is a roller derby league based in Mount Morris, Michigan. Founded in 2008, the league consists of a single team, which competes against teams from other leagues.

Mid Michigan was founded in July 2008, and claims that it was the fifth roller derby league in the state of Michigan."Mid Michigan Derby Girls It began its first season in September 2009,"About", Mid Michigan Derby Girls and in November it was accepted as a member of the Women's Flat Track Derby Association Apprentice Program."Apprentice Leagues", WFTDA [version of 16 November 2009] At some point the league has left the program, and are not listed as a member, apprentice or otherwise, as of April 2017.

The league quickly developed a local rivalry with the Flint City Derby Girls,Jessica Strachan, "Flint roller derby rivalry reignites Saturday night", Flint Journal, October 21, 2010 and it implemented an annual bootcamp aimed at prospective skaters.William E. Ketchum III, "Mid-Michigan Derby Girls to host boot camp before new season", Flint Journal, August 2, 2012 By 2012, its skaters came from a variety of backgrounds, including a truck driver and a hairdresser.Earl Arms, "Roller derby makes a splash in Mid-Michigan", NBC News, February 23, 2012

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