Iasus or Iasos (Ancient Greek: Ἴασος) was a town in ancient Laconia, which Pausanias describes as belonging to the Achaeans.[1][2] William Smith conjectures that Iasus may be the same as Oeum;[3] the editors of the Barrington Atlas of the Greek and Roman World conjecture that it may be the same as Caryae.[4]
Its site is dependent on which, if either, of the conjectures is correct.