Bar 20 Justice is a 1938 American Western film directed by Lesley Selander and written by Arnold Belgard and Harrison Jacobs. The film stars William Boyd, George "Gabby" Hayes, Russell Hayden, Gwen Gaze, William Duncan and Pat J. O'Brien. The film was released on June 28, 1938, by Paramount Pictures. This was the 16th entry in the "Hopalong Cassidy" western series.