Folegandros (Greek: Φολέγανδρος, also Pholegandros) is a small Greek island in the Aegean Sea which, together with Sikinos, Ios, Anafi and Santorini, forms the southern part of the Cyclades. Its surface area is about 32 square kilometres (12 sq mi) and it has 765 inhabitants. It has three small villages, Chora, Karavostasis, and Ano Meria, which are connected by a paved road. Folegandros is part of the Thira regional unit.
Little is known about the ancient history of Folegandros. Its inhabitants were Dorians. Later it came under Athenian rule. The island was conquered in 1207 by the Venetian Marco Sanudo and remained under the rule of Venice until 1566, when it was taken by the Ottoman Turks. The Greeks reclaimed it in the 19th century.
Folegandros' landscape is varied, and includes tall cliffs and a large cave. The "capital" of the island, Chora, is built on the edge of a 200-metre high cliff. The port of Folegandros is the small town of Karavostasis. The village of Ano Meria contains a small but interesting Ecological and Folklore Museum. Among the notable beaches on Folegandros is Katergo, accessible only by boat from Karavostasis.