Kastelorizo (Greek: Καστελόριζο - Kastelorizo, officially Μεγίστη - Megisti) is a Greek island and municipality located in the southeastern Mediterranean. It lies roughly 2 km (1 mi) off the south coast of Turkey, about 570 km southeast of Athensand 125 km (78 mi) east of Rhodes, almost halfway between Rhodes and Antalyaand 280 km (170 mi) to Cyprus. Kastelorizo is part of the Rhodes regional unit.
The meaning of its current official name Megisti (Μεγίστη) is "biggest" or "greatest", but at only 11.987 km2 (5 sq mi) in area, it is the smallest of the Dodecanese. The name, however, refers to the fact that it is the largest of the small archipelago.