Forty Naughty Girls is a 1937 American comedy mystery film directed by Edward F. Cline and written by John Grey. The film stars James Gleason, ZaSu Pitts, Marjorie Lord, George Shelley and Joan Woodbury. It is the sixth and final entry in RKO Pictures' series of Hildegarde Withers films. This film was the sixth film in the Hildegarde Withers-Oscar Piper series, and the second film in which ZaSu Pitts appeared as Hildegarde. Before Pitts, Edna May Oliver and Helen Broderick had played the role.