Jupiter may refer to:

• Jupiter, the planet
• Jupiter, a Roman god
• the "Jupiter Symphony", a symphony by Mozart
• Jupiter, Florida
• Two rockets:
  • Jupiter IRBM
  • Jupiter-C
• "Jupiter, the Bringer of Jollity", a movement in Holst's suite The Planets
• Sailor Jupiter, the codename of Makoto Kino, a character in the Sailor Moon franchise
• Jupiter JVM - a Java virtual machine
• Jupiter, a video game company.
• Jupiter, the main villain in Robin Jarvis's The Deptford Mice trilogy
• The Jupiter Novels, a series of science fiction novels published by Tor Books.
• Jupiter, a variety of apple developed in Kent, England