Ithaca or Ithaka (/ˈɪθəkə/; Greek: Ιθάκη, Ithakē [iˈθaci]) is a Greek island located in the Ionian Sea, off the northeast coast of Kefalonia and to the west of continental Greece.
Ithaca has an area of 120 square kilometres (46 sq mi) and a little more than three thousand inhabitants. It is the second-smallest of seven main Ionian Islands, after Paxi. Ithaka is a separate regional unit of the Ionian Islands region, and the only municipality of the regional unit. The capital, Vathy or Ithaki, has one of the world's largest natural harbours.
Modern Ithaca is generally identified with Homer's Ithaca, the home of Odysseus, whose delayed return to the island is one of the elements of the Odyssey's plot.