Treasure Island is an adventure novel by Scottish author Robert Louis Stevenson. Treasure Island may also refer to:

"Treasure Island", corporate slang for the United Kingdom, as many multinational companies have a higher profit margin on the products they ship there

Treasure Island (Tennessee), an island in Lake McKellar south of Memphis, Tennessee

Treasure Island (record), a 1974 record by jazz pianist Keith Jarrett

Muppet Treasure Island, 1996 film rendition of Stevenson's novel starring The Muppets and Tim Curry

Treasure Island (store-jcpenny), a defunct discount store owned by J. C. Penney

Treasure Island (California), an island in San Francisco Bay

Mt. Olympus Water & Theme Park, in Wisconsin Dells, Wisconsin, formerly Treasure Island Resort

Treasure Island (show), 1997-present, a New Zealand, Irish, and Australian reality television programme

Treasure Island (1934 film), 1934 film starring Jackie Cooper and Wallace Beery

Isla de la Juventud ("Isle of Youth"), the second-largest Cuban island, at various times named La Evangelista, Isla de Cotorras ("Isle of Parrots") and Isla de Tesoros ("Treasure Island")

Treasure Island Hotel and Casino in Las Vegas, Nevada

Treasure Island, Florida

Treasure Island Media, a San Francisco-based gay pornography studio

Treasure Island Scout Reservation, a Boy Scout camp in the Delaware River between Pennsylvania and New Jersey

Destination Treasure Island, an adventure game

Treasure Island (computer game), a game made for computers such as the Commodore Plus/4 and the Commodore 64 around 1984/1985

Treasure Island (1988 animated film), 1988 Soviet animated film released by Kievnauchfilm

Treasure Island (Zhenbao Island)

Treasure Island (1990 film), 1990 film starring Christian Bale and Charlton Heston

Treasury Islands, a small group of islands a few kilometers to the south of Bougainville and 24 kilometers from the Shortland Islands

Treasure Island (1950 film), 1950 Disney film starring Bobby Driscoll and Robert Newton

Treasure Island, Fiji, a coral island and resort that is part of the Mamanuca Islands

Treasure Island (1972 film), 1972 film starring Orson Welles

Treasure Island (1972 animated film), a 1972 film released by Filmation

Reach Island, or Treasure Island, an island in the state of Washington

Return to Treasure Island, 1986 Disney mini-series starring Brian Blessed