Sheriff of Sage Valley is a 1942 American Western film directed by Sam Newfield.

Upon arrival in Sage Valley Mayor Jed Harrison appoints Billy Sheriff to arrest the criminal mastermind Kansas Ed that turns out to be Billy's long lost brother.

[2] This film takes a significant amount of poetic license with historical fact.

Billy the Kid was never a hero made sheriff, and he did not have a twin brother.

[2] In its December 9, 1942 edition, Variety noted that this low budget indie film "ranks with the best in the field".