The Echinades (/ᵻˈkɪnədiːz/; Greek: αἱ Ἐχινάδες νῆσοι per Herodotus, Thucydides, and Strabo, per Homer Echinae (αἱ Ἐχῖναι νῆσοι, Italian: Curzolari) are a group of islands in the Ionian Sea, off the coast of Acarnania, Greece. The archipelago is commonly subdivided into three groups: the Drakoneres in the north, the Modia in the middle and the Ouniades in the south. Administratively, the Echinades form part of two regional units: Ithaca and Cephalonia. Six of the islands, including Oxeia the largest, are owned by Sheikh Hamad bin Khalifa al-Thani, the emir of Qatar, who purchased them for a reported £7.3 million sterling. The Battle of the Echinades in 1427 and the Battle of Lepanto in 1571 were fought at or near the islands.
Several of the islands have been joined to the mainland by alluvial deposits. Herodotus says that half of the islands had been already united to the mainland in his time (ii. 10); and Thucydides expected that this would be the case with all of them before long, since they lay so close together as to be easily connected by the alluvium brought down by the Achelous River (ii. 102.). This expectation, however, has not been fulfilled, which Pausanias attributed (viii. 24. § 11) to the Achelous bringing down less alluvium in consequence of the uncultivated condition of Aetolia; but there can be little doubt that it is owing to the increasing depth of the sea, which prevents any perceptible progress being made.