Othonoi is an island and a former community of the Ionian Islands, Greece. Othonoi belong to Diapontia Islands. An island complex of the Ionian Sea located at the northwestern end of Corfu and including Ereikoussa and Mathraki as well as some smaller inhabited islets. Othonoi, the biggest island of the complex is located at the westernmost part of the Greek territory. It has a wonderful natural environment comprising of the ruins of Venetian castles, traditional houses and old churches. Ammos is the port of Othonoi. Othonoi is located at 12 n.m. to the W-NW of cape Drastis of Corfu. Since the 2011 local government reform it is part of the municipality Corfu, of which it is a municipal unit. Population 663 (2001). In the 19th century the island used to be the capital of the Diapontia Islands Municipality, which consisted of the islands of Fano, Marlera and Mathrachi. Most of the island’s inhabitants can trace their origins to Paxoi Island as people from Paxoi were settled in Fano beginning in the 1570’s by Venice. A cave, near the Aspros Ammos (white sands) beach is traditionally believed to have been the place where Calypso kept Ulysses captive.