Korythio (Greek: Κορύθιο) is a former municipality in Arcadia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Tripoli, of which it is a municipal unit.[2] The municipal unit has an area of 115.182 km2.[3] Population 1,583 (2021). The seat of the municipality was in Steno. Other villages in the municipal unit are Agiorgitika, Elaiochori, Neochori, Partheni, and Zevgolateio.