Nea Filadelfeia-Nea Chalkidona (, before 2017: Filadelfeia-Chalkidona) is a municipality in the Central Athens regional unit, Attica, Greece. The seat of the municipality is the town Nea Filadelfeia. The municipality has an area of 3.650 km<sup>2</sup>.
The municipality Nea FiladelfeiaâÂÂNea Chalkidona was formed at the 2011 local government reform by the merger of the following 2 former municipalities, that became municipal units: