Thunderheart is a 1992 American Neo-Western mystery film directed by Michael Apted from a screenplay by John Fusco. The film is a loosely based fictional portrayal of events relating to the Wounded Knee incident in 1973, when followers of the American Indian Movement seized the South Dakota town of Wounded Knee in protest against federal government policy regarding Native Americans. Incorporated in the plot is the character of Ray Levoi, played by actor Val Kilmer, as an FBI agent with Sioux heritage investigating a homicide on a Native American reservation. Sam Shepard, Graham Greene, Fred Ward and Sheila Tousey star in principal supporting roles. Also in 1992, Apted had previously directed a documentary surrounding a Native American activist episode involving the murder of FBI agents titled Incident at Oglala. The documentary depicts the indictment of activist Leonard Peltier during a 1975 shootout on the Pine Ridge Indian Reservation.

The film was a co-production between the motion picture studios of TriStar Pictures, Tribeca Productions, and Waterhorse Productions. It was commercially distributed by TriStar Pictures theatrically, and by Columbia TriStar Home Video for home media. Thunderheart explores civil topics, such as discrimination, political activism and murder. Following its cinematic release, the film garnered several award nominations from the Political Film Society. On November 24, 1992, the Original Motion Picture Soundtrack was released by the Intrada Records label. The film score was composed by James Horner.

Thunderheart premiered in theaters in-wide release in the United States on April 3, 1992 grossing $22,660,758 in domestic ticket sales. The film was considered a minor financial success after its theatrical run, and was met with generally positive critical reviews before its initial screening in cinemas.