Waterworld is a 1995 post-apocalyptic science fiction film directed by Kevin Reynolds and co-written by Peter Rader and David Twohy. It was 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 previous collaboration between Kevin Costner and Kevin Reynolds, who 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 takes place in 2500. The polar ice caps have completely melted, and the sea level has risen many hundreds of meters, covering nearly 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 until nearly 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.