The Poseidon of Melos (Ancient Greek: Ποσειδῶν τῆς Μήλου) is a statue of Poseidon in the National Archaeological Museum, Athens (NAMA), with an inventory number 235, which is dated to the last quarter of the second century BC, thus to the Hellenistic Period.
The statue was found in 1877 on the island of Melos, where the famous Venus de Milo was also found, in 1820. It is made of Parian marble and has a height of 2.35 metres, which makes it more than lifesize. The statue was found in several pieces, which have been reattached to one another. Portions of the left foot and of the himation are modern recreations. Parts of the nose, beard and hair are missing.