Irakleia or Heraklia (Greek: Ηρακλειά) 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 141 inhabitants at the 2011 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. In close proximity to Schoinoussa, Koufonisi, Donoussa, and Keros islands, together they form the Small 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.
Iraklia is the largest island of Small Cyclades. It is located in the east part of the complex of Small Cyclades, south of Naxos. The island has two settlements, Panagia in the middle of the island and Agios Georgios, where the port is located. Irakleia is inhabited from early antiquity. On the island there are many mysterious rock paintings dated about 5,000 years before. The paintings named Bousoules (Μπούσουλες) and they possibly used to serve as orientation marks. The island continues to be populated and the subsequent years. In the place Livadi, an ancient fortress is saved. The fortress dated from 4th-2nd century B.C. At modern years, Iraklia was property of Hozoviotissa Monastery in nearby island Amorgos.