The Messenian Gulf (Greek: Μεσσηνιακός Κόλπος, Messiniakós Kólpos) is a sea that is part of the Ionian Sea. The gulf is circumscribed by the southern coasts of Messenia and the southwestern coast of the Mani peninsula in Laconia. Its bounds are Venetiko Island to the west and Cape Tainaron to the southeast.