Irakleia or Heraklia is an island and a former community in the Cyclades, Greece. Since the 2011 local government reform it is part of the municipality Naxos and Lesser Cyclades, of which it is a municipal unit. Its population was officially 148 inhabitants at the 2021 census, and its land area 17.795 square kilometres (6.9 sq mi). It is a small island between the islands of Naxos and Ios. Close to Schoinoussa, Koufonisi, Donoussa, and Keros, together they form the Lesser Cyclades. The port is called Agios Georgios, while the "capital"/chora on the top of the island is called Panagia (Madonna). The biggest caves in the Cyclades are located on Irakleia. Irakleia can be reached by ferries from Athens, Naxos and Paros.