Riders of the Deadline is a 1943 American Western film directed by Lesley Selander and written by Bennett Cohen. The film stars William Boyd, Andy Clyde, Jimmy Rogers, Frances Woodward, Robert Mitchum, Richard Crane, Anthony Warde and William Halligan. The film was released on December 3, 1943, by United Artists.

Texas Ranger Tim Mason (Richard Crane) is killed on the Mexican border for refusing to allow a wagonload of stolen goods to cross his land. Ranger Hopalong Cassidy (William Boyd) is accused of the murder, and goes undercover to help Tim's sister Sue (Frances Woodward), who is unaware that her barn is being used to store stolen goods.