Treasure Planet is a 2002 American animated science fiction adventure film produced by Walt Disney Feature Animation. It is a science fiction adaptation of Robert Louis Stevenson's novel Treasure Island (1883) and the third Disney adaptation of the novel, following Treasure Island (1950) and Muppet Treasure Island (1996). In the film's setting, spaceships are powered by solar sails and resemble the 18th-century sailing vessels of the original Treasure Island.

The film was directed by John Musker and Ron Clements and written by Musker, Clements and Rob Edwards. It features the voices of Joseph Gordon-Levitt, Brian Murray, David Hyde Pierce, Martin Short, Roscoe Lee Browne, Emma Thompson, Michael Wincott, Laurie Metcalf, and Patrick McGoohan in his final feature role. The musical score was composed by James Newton Howard, with songs written and performed by John Rzeznik.

Clements and Musker pitched the concept for the film during production of The Little Mermaid (1989). Development began after they finished their work on Hercules (1997). It employs a novel technique of hand-drawn 2D traditional animation set atop 3D computer animation. With a budget of $140 million, it is the most expensive traditionally animated film to date.

Treasure Planet premiered in Paris, France on November 6, 2002, and received a wide theatrical release on November 27. It was the first film to be released simultaneously in regular and IMAX theaters. The film was a box-office failure, earning $109 million worldwide against a budget of $140 million. It received generally positive reviews from critics and was nominated for Best Animated Feature at the 75th Academy Awards. The film has since gained a cult following.