Margo Todd (born July 24, 1950) is an American historian.
She obtained an undergraduate degree from Tufts University and attended the Washington University in St. Louis, where she earned a master's degree and doctorate. Todd then joined the Vanderbilt University faculty. In 2003, she began teaching at the University of Pennsylvania as the Walter H. Annenberg Professor of History. Todd was awarded a Guggenheim fellowship in 2004.