Oklahoma! is a 1955 American musical film based on the 1943 musical of the same name by Richard Rodgers and Oscar Hammerstein II, which in turn was based on the 1931 play Green Grow The Lilacs written by Lynn Riggs. It stars Gordon MacRae, Shirley Jones (in her film debut), Rod Steiger, Charlotte Greenwood, Gloria Grahame, Gene Nelson, James Whitmore, and Eddie Albert. The production was the only musical directed by Fred Zinnemann. Oklahoma! was the first feature film photographed in the Todd-AO 70 mm widescreen process (and was simultaneously filmed in CinemaScope 35mm).

The film received a rave review from The New York Times, and was voted a "New York Times Critics Pick". It won Academy Awards in the categories of musical scoring and sound recording. In 2007, Oklahoma! was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant".