Robert Crichton may refer to:Robert Crichton (bishop), Scottish Catholic cleric Robert Crichton (1530–1582), Lord Advocate of Scotland Robert Crichton, 6th Lord Crichton of Sanquhar Robert Crichton, 8th Lord Crichton of Sanquhar, son of Edward, Lord Sanquhar Robert Crichton (novelist) (1925–1993), American novelist Robert Crichton (1897–1940), Irish rugby union player Robert Crichton (comics), a supporting character in DC Comics