Riders of the Purple Sage is a Western novel by Zane Grey, first published by Harper & Brothers in 1912. Considered by scholars to have played a significant role in shaping the formula of the popular Western genre, the novel has been called "the most popular western novel of all time".

Riders of the Purple Sage is a 1918 American silent Western film directed by Frank Lloyd and starring William Farnum, Mary Mersch, and William Scott. The film is about a former Texas Ranger who goes after a group of Mormons who have abducted his married sister. This Frank Lloyd silent film was the first of five film adaptations of Zane Grey's 1912 novel.