How many moons does Neptune have?

Neptune has fourteen known moons as of the year 2013, five of those fourteen having been discovered in 2002, 2003 and 2013.

Here's a list of all known moons, in order of increasing orbital radius from Neptune:

  • Naiad
  • Thalassa
  • Despina
  • Galatea
  • Larissa
  • Proteus
  • Triton
  • Nereid
  • Halimede
  • Sao
  • Laomedeia
  • Psamathe
  • Neso
  • S/2004 N1 (may soon be named Polyphemus)

Neptune has 14 moons that have been discovered so far. The largest is Triton and the smallest named moon is Psamathe.