P9 or P-9 may refer to:

  • Planet Nine, a hypothetical new planet in the far outer solar system
  • Boeing XP-9, a prototype fighter aircraft from the 1930s
  • Heckler & Koch P9, a semi-automatic pistol
  • Springfield Armory P9, a semi-automatic pistol
  • Peruvian Airlines IATA airline designator
  • P9 (band), a Brazilian boyband
  • Power Nine, a set of 9 rare cards from the Magic: The Gathering TCG, widely considered to be the most powerful cards ever printed in the game.
  • Psyclon Nine, an aggrotech band
  • P-9 Project

See also

  • 9P (disambiguation)