Waterworld is a 1995 American post-apocalyptic science fiction action 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 with Charles Gordon and John Davis. It was distributed by Universal Pictures.

Water World or Waterworld can mean:

• Water World, Colorado, recreational water park in Federal Heights, Colorado
• Waterworld, Hamilton, water park in Hamilton, New Zealand
• Waterworld California, water park in Concord, California
• Water World, Stoke-on-Trent, indoor water park in Festival Park
• Waterworld, 1995 science fiction film
  • Waterworld (video game), trio of video games based on the film
  • Waterworld (pinball), a pinball machine based on the film
  • , show featured at many Universal Studios parks around the world based on the 1995 film
• Waterworld, third game in the Swordquest series of games by Atari for the Atari 2600
• Waterworld (Binary Star album), first album from Michigan hip hop duo Binary Star
• Waterworld (Leak Bros. album), 2003 album from underground rappers Cage Kennylz and Tame One
• Waterworld, ITV documentary series presented by Timothy West, about 'the people who live and work on the canals of the Midlands'