Pontoon may refer to:

• Float (nautical), an air-filled structure providing buoyancy
• Any of various objects that float on pontoons, including:
  • Pontoon (boat), a flat-bottomed boat supported by two or more pontoons
  • Floatplane, also known as a pontoon plane
  • Floating dock (jetty), a platform supported by pontoons
  • Pontoon bridge, a bridge supported by shallow draft open boats or encased floats

• Pontoon (card game), a mainly British card game similar to blackjack (also known as vingt-et-un or 21)
  • Malaysian Pontoon, the variant of pontoon popular in Australian/Malaysian casinos
• "Pontoon" (song), a song by Little Big Town
• Pontoon: A Novel of Lake Wobegon, a 2007 book by Garrison Keillor

• Ponton (automobile), or Pontoon style, the automobile fender style
• Pontoon, County Mayo, Ireland