Nea Erythraia is a town and suburb located in the northeastern part of the Athens agglomeration in Greece. It serves as a municipal unit within the municipality of Kifissia, a designation established following the local government reform of 2011.
The settlement was originally established by Greek refugees who relocated from Erythraia following the 1923 Population Exchange. This historical migration defines the town's origins as part of the broader demographic shifts in the region during the early 20th century.