El Dorado is a 1966 American Western film directed and produced by Howard Hawks and starring John Wayne and Robert Mitchum. Written by Leigh Brackett and loosely based on the novel The Stars in Their Courses by Harry Brown, the film is about a gunfighter who comes to the aid of an old friend who is a drunken sheriff struggling to defend a rancher and his family against another rancher trying to steal their water. The supporting cast features James Caan, Charlene Holt, Paul Fix, Arthur Hunnicutt, Michele Carey, R. G. Armstrong, Ed Asner, Christopher George, Adam Roarke and Jim Davis.

The film was first released in Japan on December 17, 1966 and then in the United States on June 7, 1967. The film received critical praise and was commercially successful, generating North American rentals of $5,950,000 on box-office receipts of $12 million.