Range War is a 1939 American Western film directed by Lesley Selander and written by Sam Robins and Walter C. Roberts. The film stars William Boyd, Russell Hayden, Britt Wood, Pedro de Cordoba, Willard Robertson, Matt Moore and Betty Moran. The film was released on September 8, 1939, by Paramount Pictures.

A range war is a type of armed conflict, which occurs in agrarian or stock-rearing societies. The subject of these conflicts was control of "open range", or range land freely used for cattle grazing, which gave the conflict its name. Typically they were disputes over water rights or grazing rights.