Kyra Panagia (Greek: Κυρά Παναγιά) is a Greek island in the Sporades. It is administratively part of the municipality of Alonnisos in the Sporades regional unit. The island is also known by the name of Pelagos and rarely Pelagonisi. In Antiquity it was known as Ephthyros (Έφθυρος) and Polyaigos (Πολύαιγος). A bay in the south west of the island is named Agios Petros. Kyra Panagia has belonged to the Athonite monastery of Megisti Lavra since it was granted the island by the Byzantine emperor Nikephoros II Phokas in 963. There is a monastery, currently (2011) under restoration and inhabited by a single monk, on the east coast of the island.