Ionian Islands (region) party. Ionian Islands (region) The Ionian Islands Region (, , ) is one of the thirteen administrative regions of Greece. The administrative region does not include all of the Ionian Islands; the island of Kythera, which historically was part of the island group, was separated and integrated to the (far away) Attica Region. The population of the Ionian Islands in 2011 was 207,855, decreased by 1,50% compared to the population in 2001. Nevertheless, the region remains the third by population density with 90.1/km² nationwide, well above the national of 81.96/km². The most populous of the major islands is Corfu with
Ithaca the only populated island in this island group. Aetos, Afales, Agios Ioannis, Agia Saranta, Anogi, Exogi, Frikes, Kalivia, Kathara, Kioni, Kolieri, Lachos, Lefki, Marmaka, Perachori, Piso Aetos, Platrithia, Rachi, Stavros, Vathy. Ithaca Ithaca, Ithaki or Ithaka (; Greek: Ιθάκη, "Ithakē" ) is a Greek island located in the Ionian Sea, off the northeast coast of Kefalonia and to the west of continental Greece. Ithaca's main island has an area of and had a population in 2011 of 3,231. It is the second-smallest of seven main Ionian Islands, after Paxi. Ithaca is a separate regional unit of the Ionian Islands region,