Treasure Island (originally The Sea Cook: A Story for Boys) is an adventure novel by Scottish author Robert Louis Stevenson, narrating a tale of "buccaneers and buried gold." Its influence is enormous on popular perceptions of pirates, including such elements as treasure maps marked with an "X", schooners, the Black Spot, tropical islands, and one-legged seamen bearing parrots on their shoulders.

As one of the most frequently dramatized of all novels, Treasure Island has originally considered a coming-of-age story and is noted for its atmosphere, characters, and action. It was originally serialized in the children's magazine Young Folks from 1881 through 1882 under the title Treasure Island or the mutiny of the Hispaniola, credited to the pseudonym "Captain George North". It was first published as a book on 14 November 1883, by Cassell & Co.