Mesoa (Ancient Greek:Μεσόα), or Messoa (Μεσσόα), was a settlement that existed before the Dorian conquest. It was united with three other such settlements (Pitane, Limnae, and Cynosura) by a common sacrifice to Artemis, and eventually coalesced into ancient Sparta. It is probable that Mesoa was in the southeast part of the city.

Its site is unlocated.

This articleincorporates text from a publication now in thepublic domain:Smith, William, ed. (1854–1857). "Sparta". Dictionary of Greek and Roman Geography. London: John Murray.