Limnaea

Limnaea or Limnaia (Λιμναία) may refer to:
 * Limnaea (Acarnania), a town of ancient Acarnania, Greece
 * Limnaea (Thessaly), a town of ancient Thessaly, Greece
 * Limnaea, a genus of snails in the family Lymnaeidae, synonym of Lymnaea
 * Limnaea, a genus of bivalves in the family Unionidae, synonym of Unio