Fair Warning is a 1931 American pre-Code Western film directed by Alfred L. Werker and starring George O'Brien, Louise Huntington and Mitchell Harris.

[2] The film's premise came from a novel by Max Brand, which initially was published in serial form in The All-Story from December 7, 1918, through January 11, 1919.

[3] When Whistlin' Dan Barry is warned to leave a town, he refuses to do so.

As a result, he defeats Jim Silent (the town's villain) and gets romantic with Kate Cumberland.

[2] A review in Harrison's Reports called Fair Warning "an excellent outdoor picture" that had O'Brien in a fearless role, helping him to win "the spectator's good will, which follows him throughout the story.