Situated between Patmos and Kalymnos. The area reaches 55.30 square km. It is the capital municipality with capital Agia Marina where the municipality of the island is located. Although the territory is rocky but there are fertile lands and well water. Produces horticultural species. It has mines magnesite and lead. In ancient times, Leros was covered by many forests and livestock and hunting flourished too. It was the famous Artemis temple that existed on the island. It is of particular strategic importance because the position of the Aegean is privileged and because the formation of beaches with its many bays (Gourna bay, Plofouti, Lakki Partheni, Agia Marina) and the physical ports to ensure ships secure bases.