Margaret Hilary Marshall is the former 24th chief justice of the Massachusetts Supreme Judicial Court, and the first woman to hold that position. She was chief justice from 1999 to 2010. On July 21, 2010, she announced her retirement. She was Senior Fellow of the Yale Corporation until she retired from the board in 2016, Senior Counsel at Choate Hall & Stewart, and a member of the Council of the American Law Institute. Marshall was elected in 2017 to the American Philosophical Society.