South Pelion (, Notio Pilio) is a municipality in the Magnesia regional unit, Thessaly, Greece. The seat of the municipality is the town Argalasti. The municipality has an area of 368.539 km<sup>2</sup>. It comprises the southern part of Mount Pelion.
The municipality South Pelion was formed at the 2011 local government reform by the merger of the following 5 former municipalities, that became municipal units: