Ithaca is an island in the Ionian Sea west of mainland Greece: small, rugged, with a harbor, mountain, and nearby isles (Same, Zakynthos).
The prevailing theory identifies Homeric Ithaca with the modern island of Ithaki (Ithaca) in the Ionian Islands. Its geography—indented coast, two harbors, mountains—matches the epic. Neighboring Kefalonia (Same) and Zakynthos align.
Some scholars propose Lefkada (south of Corfu) or an islet off Kefalonia based on archaeological evidence.
The exact location remains debated, but Ithaki is the most widely accepted correlate.