Parnassos (Greek: Παρνασσός) is a former municipality in Phocis, Greece, named after Mount Parnassus. Since the 2011 local government reform it is part of the municipality Delphi, of which it is a municipal unit. The municipal unit has an area of 87.033 km. Population 1,610 (2021). The seat of the municipality was in Polydrosos.