Kathryn Jean Martin Sullivan AM (born 8 March 1942) is a former Australian politician. A member of the Liberal Party, she was a Senator for Queensland from 1974 to 1984 and a member of the House of Representatives from 1984 to 2001, holding the seat of Moncrieff. She broke Dorothy Tangney's record for the longest period of service in federal parliament by a woman, which was later surpassed by Bronwyn Bishop. She was the first woman to have served in both houses of parliament.