
Action is a 1921 American Western film directed by John Ford and featuring Hoot Gibson. It was based on Peter B. Kyne's popular novel The Three Godfathers. The film is considered to be lost. According to contemporaneous newspaper reports, Action was based on J. Allan Dunn's novel, The Mascotte of the Three Star; Mascotte appeared as the lead novel in the pulp magazine Short Stories, February 1921.

The Avenging Arrow is a 1921 American Western film serial directed by William J. Bowman and W. S. Van Dyke. Its 15 episodes are now considered to be lost.

The Big Punch is a 1921 American Western film directed by John Ford. No copy of the film is known to survive in either a public repository or private collection, so it is currently presumed to be a lost film. In France, the film was known under the title Un homme libre.

Desperate Trails is a 1921 American western film directed by John Ford and featuring Harry Carey. The film is considered to be lost.

Devil Dog Dawson is a 1921 American silent western film directed by Karl R. Coolidge and starring Jack Hoxie, Helene Rosson and Evelyn Selbie. It was produced by Unity Photoplays and released on the states-rights market by Arrow Film Corp.

The Fox is a lost 1921 American silent Western film starring Harry Carey. Directed by Robert Thornby, it was produced and distributed by Universal Film Manufacturing Company.

The Freeze-Out is a 1921 American Western film directed by John Ford and starring Harry Carey. The film is considered to be a lost film.

Hearts Up is a 1921 American Silent Western film directed by Val Paul and starring Harry Carey.

The Killer is a 1921 American silent western film directed by Jack Conway and Howard C. Hickman and starring Claire Adams, Jack Conway and Frankie Lee.

The Night Horsemen is a surviving 1921 American silent western film directed by Lynn Reynolds and starring Tom Mix. It was produced by William Fox and released by Fox Film Corporation. It was advertised as a sequel to the film The Untamed (1920), but the only actor reprising their role was Mix.

O'Malley of the Mounted is a 1921 American silent Western film directed by Lambert Hillyer and written by Hillyer and William S. Hart. The film stars William S. Hart, Eva Novak, Leo Willis, Alfred Allen, Bert Sprotte, and Antrim Short. The film was released on February 6, 1921, by Paramount Pictures.

Red Courage is a lost 1921 American Western film directed by B. Reeves Eason and featuring Hoot Gibson.

The Sage Hen is a 1921 American silent western film directed by Edgar Lewis and starring Gladys Brockwell, Wallace MacDonald, and Richard Headrick.

Singing River is a 1921 American silent western film directed by Charles Giblyn and starring William Russell, Vola Vale and Clark Comstock.

Steelheart is a 1921 American silent western film directed by William Duncan and starring Duncan, Edith Johnson and Jack Curtis.

Straight from the Shoulder is a lost 1921 silent film western directed by Bernard J. Durning and starring Buck Jones. It was produced and distributed by Fox Film Corporation.

Sunset Jones is a 1921 American silent western film directed by George L. Cox and starring Charles Clary, James Gordon, and Irene Rich.

Sure Fire is a 1921 American Western film directed by John Ford and featuring Hoot Gibson. It is considered to be a lost film.

Terror Trail is a 1921 American Western film serial directed by Edward A. Kull. It is considered to be a lost film.

That Girl Montana is an extant 1921 American silent western film starring Blanche Sweet and distributed by Pathé Exchange. Jesse D. Hampton produced and Robert Thornby directed. The film is based on a 1901 novel, That Girl Montana, by Marah Ellis Ryan. This is one of Sweet's few 1920s silent films to survive and is available in the DVD format.

Three Word Brand is a 1921 American western film distributed by Paramount Pictures that was directed by Lambert Hillyer and starred William S. Hart and Jane Novak. Hart plays three roles in the film.

The Wallop is a 1921 American western film directed by John Ford and starring Harry Carey. The film is considered to be lost.

Where Men Are Men is a 1921 American silent western film directed by William Duncan and starring Duncan, Edith Johnson and George Stanley.
The White Horseman is a 1921 American Western film serial directed by Albert Russell. The serial consisted of eighteen episodes and is now is considered lost although some print clippings are known to have survived.

White Oak is a 1921 American silent Western film directed by Lambert Hillyer and written by William S. Hart and Bennet Musson. The film stars William S. Hart, Vola Vale, Alexander Gaden, Robert D. Walker, Bert Sprotte, Helen Holly, and Luther Standing Bear. The film was released on December 18, 1921, by Paramount Pictures. A copy of the film is in the Library of Congress, Museum of Modern Art, and William S. Hart Museum film archives.

Winners of the West is a 1921 American western film serial directed by Edward Laemmle. This serial is considered to be a lost film.