Lappa is a former municipality in the Rethymno regional unit, Crete, Greece. Since the 2011 local government reform it is part of the municipality Rethymno, of which it is a municipal unit. The municipal unit has an area of 51.132 km2 (19.742 sq mi). Population 1,915 (2021). The seat of the municipality was in Episkopi. The municipality's name was a revival of the name of the ancient city of Lappa, now the village of Argyroupoli.