Jupiter may refer to:

• Jupiter, the planet
• Jupiter, a Roman god
• the "Jupiter Symphony", a symphony by Mozart, (Symphony No. 41 in C major, K. 551)
• Jupiter, Florida
• Two rockets:
  • Jupiter IRBM
  • Jupiter-C
• "Jupiter, the Bringer of Jollity" (or "Joy"), a movement in Gustav Holst's The Planets suite, which inspired the song "Joybringer" by Manfred Mann's Earth Band and was also made into the hymn I vow to thee my country