Mary Maples Dunn (April 6, 1931 – March 19, 2017) was an American historian. Born in Sturgeon Bay, Wisconsin, Dunn graduated from The College of William & Mary in 1954 and received her Ph.D. from Bryn Mawr College in 1959, where she taught and served as dean from 1978 to 1985. She served as the eighth president of Smith College, for ten years beginning in 1985. Dunn was also the director of the Schlesinger Library from 1995 to 2000. She was acting president of Radcliffe College when it merged with Harvard University, and she became the acting dean of the newly created Radcliffe Institute for Advanced Study after the merger. Retired, Dunn became a Radcliffe Institute Fellow. She was the co-executive officer of the American Philosophical Society from 2002 to 2007.