Halki (; alternatively Chalce or Chalki) is a Greek island and municipality in the Dodecanese archipelago in the Aegean Sea, some west of Rhodes. With the area of , it is the smallest inhabited island of Dodecanese. It is part of the Rhodes regional unit. It has permanent population of 330 (increased during the summer months), concentrated in the only village Emborio. The 2011 census showed a population of 478 inhabitants. The community is divided in two parts, Chorio (also spelled Horio - the village) Χωριό and Emporio Εμποριό (the port).