Mary Margaret "Maggie" Crotty (née Kunis; October 16, 1948 – November 5, 2020) was an American politician who served as the Bremen Township Supervisor from 2005 to 2020 and as a Democratic member of the Illinois Senate, representing the 19th district from 2003 to 2013. She was Chairperson of the Elections Committee, Vice-Chairperson of the Local Government Committee, and was a member of the Higher Education, Labor, and Revenue Committees. She announced she would not be seeking reelection after her term expired in 2013.