Waterworld is a 1995 post-apocalyptic science fiction film. The film was directed by Kevin Reynolds and co-written by Peter Rader and David Twohy. It is based on Rader's original 1986 screenplay and stars Kevin Costner, who also produced it. It was distributed by Universal Pictures. The film was the follow-up project to the last collaboration between Kevin Costner and Kevin Reynolds, who previously worked together on Robin Hood: Prince of Thieves in 1991.

The setting of the film is the distant future. Although no exact date was given in the film itself, it has been suggested that it took place in 2500. The polar ice caps have completely melted, and the sea level has risen many hundreds of metres, covering virtually all the land. The film illustrates this with an unusual variation on the Universal logo, which begins with the usual image of Earth, but shows the planet's water levels gradually rising and the polar ice caps melting as well until virtually all the land is submerged. The plot of the film centers on an otherwise nameless antihero, "the Mariner", a drifter who sails the Earth in his trimaran.

Waterworld was released to mixed reviews, despite being moderately successful at the international box office. The film's release was accompanied by a tie-in novel and video game, and also three popular themed attractions at Universal Studios Hollywood, Universal Studios Singapore and Universal Studios Japan based on the film, called Waterworld: A Live Sea War Spectacular, which are all still running as of 2011.