Olympos (Greek: Όλυμπος) is a former municipality in the Larissa regional unit, Thessaly, Greece. Since the 2011 local government reform it is part of the municipality Elassona, of which it is a municipal unit. Population 3,164 (2011). The municipal unit has an area of 303.964 km2. The seat of the municipality was in Kallithea. The municipality was named after the nation's highest point, Mount Olympus.