Dorio (Greek: Δώριο) is a village and a former municipality in Messenia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality Oichalia, of which it is a municipal unit. The population of the municipal unit is 4,069, and of the village alone 1,416 (2001 census). Dorio is 170 m above sea level. The small settlement of Ano Dorio is nearby. Dorio has been mentioned in Homer's Iliad, and by Strabo and Pausanias. Homer recounts a myth that Dorio was the location of a music competition between Thamyris and the Muses.