Margaret Clancey (July 29, 1897 - March 8, 1989) was an American film editor.Clancey edited twenty-nine Hollywood films from 1927 to 1938, including Hangman's House, Society Girl, Slaves of Beauty, Song o' My Heart, The Gay Desperado, History Is Made at Night, Mother Knows Best, Splendor and The Adventures of Tom Sawyer.