Ithaca, or Ithaka (Ithaki in modern Greek, Ιθάκη ) is an island in the Ionian Sea, in Greece with an area of 96 km² and 4663 inhabitants (2001). It is the legendary home of Odysseus from Homer's Odyssey, and, according to some scholars, the home of Homer himself. It is an independent municipality of the prefecture of Kefalonia.

The island has been inhabited since the 2nd millennium BC. It was the capital of Cephalonia during the Mycenaean period. Through the Trojan War it was ruled by the legendary king Odysseus. The Romans occupied the island in the 2nd century BC, and later it became part of the Byzantine empire. The Normans ruled Ithaca in the 12th and 13th century, and after a short Turkish rule it fell into Venetian hands. Ithaca was then occupied by France at the end of the 18th century and in 1809 it was conquered by the British. In 1864 Greeks liberated it.

The gorgeous rocky island of Ithaca is separated from Kefalonia by the 2 nm wide Ithaca channel and is almost cut into two by the long Gulf of Molos on its east side; the isthmus is only 600 m wide. Ithaca, together with the Echinades isles - forms a marvellous area for yacht charters. The Echinades islands were named after the sea urchin (Echinoidea) describing their sharp and prickly coastlines. Atokos Island is uninhabited but provides two beautiful anchorages. The must-see harbours and anchorages include: Frikes, Kioni, Vathy, Polis Bay.