Leipsoi (Greek: Λειψοί, also: Lipsi; anciently, Lepsia, Ancient Greek: Λέψια) is an island south of Samos and to the north of Leros in Greece. It is well serviced with ferries passing between Patmos and Leros and on the main route for ferries from Piraeus. Leipsoi is a small group of islets at the northern part of the Dodecanese near to Patmos island and Leros. The larger Leipsi-Arkoi archipelago consists of some 37 islands and islets of which only three are larger than 1 square kilometre (247 acres): Leipsoi (15.95 square kilometres (6.16 sq mi)), Arkoi (6.7 square kilometres (2.59 sq mi), part of Patmos municipality) and Agreloussa (1.32 square kilometres (0.51 sq mi), part of Patmos municipality). Only Leipsoi, Arkoi and Marathos are inhabited. Leipsoi is a municipality, part of the Kalymnos regional unit, which is part of the South Aegean region. The municipality has an area of 17.350 square kilometres (6.699 sq mi). In ancient times, it contained a town named Lepsia.