Pserimos is a Greek island administratively belongs to the municipality of Kalymnos. Located north of Kos and Kalymnos southeast.

The north end of Pserimos called Akra Basilica while the southernmost Accra Roussa. It has a total area of approximately 15,000 square kilometers and its population since the last census estimated at 80 inhabitants.

Behind the main settlement of Pserimos stands the harbor, where small olive grove and pine spread . Pserimos is connected daily with Kalymnos island and Kos island . The tranquil scenery transforms and the quiet port becomes busy. The sandy bays in the harbor and in Vathi converts Pserimos to a unique place. On the island have been found remains of an ancient settlement, which some archaeologists identify with Perraiotan municipality. To the west lies the Platy islet,  a part of which is a separate islet, Nekrothiki. Pserimos is ideal for a quiet holiday and walkers.