Mandra-Eidyllia () is a municipality in the West Attica regional unit, Attica, Greece. The seat of the municipality is the town Mandra. The municipality has an area of 426.197 km<sup>2</sup>.
The municipality MandraâÂÂEidyllia was formed at the 2011 local government reform by the merger of the following 4 former municipalities, that became municipal units: