The Polygnotos Vagis Municipal Museum is located in the village of Potamia on the island of Thasos, Greece, 14 km from the main town of Limenas.
Since the 2011 local government reform it is part of the municipality Elassona, of which it is a municipal unit.
Since the 2011 local government reform it is part of the municipality Karpenisi, of which it is a municipal unit.