Roger P. Reitz, M.D. (born November 11, 1932) is an American doctor and politician, who served as a Republican member of the Kansas Senate, representing the 22nd District, 2005-2013. Reitz served as a representative in the Kansas House of Representatives from 2002 to 2005. He previously had served as mayor and city commissioner for the Manhattan City Commission and was president and member of Unified School District 383 School Board.