Chisum is a 1970 American Western film directed by Andrew V. McLaglen, starring John Wayne in the title role, and adapted for the screen by Andrew J. Fenady from his short story "Chisum and the Lincoln County War". The supporting cast features Forrest Tucker, Christopher George, Ben Johnson, Glenn Corbett, Andrew Prine, Bruce Cabot, Patric Knowles, Richard Jaeckel, Lynda Day George, Pedro Armendariz Jr., John Agar, John Mitchum, Ray Teal, Christopher Mitchum and Hank Worden with Geoffrey Deuel and Pamela McMyler receiving "introducing" credits. The picture was filmed in Panavision and Technicolor.

Chisum is based on the Lincoln County War of 1878 and, although it changed a number of details, many of the historical figures in the film (such as Chisum, Tunstall, McSween, Murphy, Brady, Evans, Garrett, and Billy the Kid) were in the New Mexico Territory at the time and did play a part in the conflict.