Nea Erythraia (Greek: Νέα Ερυθραία) is a suburb in the northeastern part of the Athens agglomeration, Greece. Nea Erythraia is situated 14 km northeast of Athens city centre.
The built-up area of Nea Erythraia is continuous with that of the neighbouring suburb Kifisia.
Since the 2011 local government reform it is part of the municipality Kifisia, of which it is a municipal unit.