Vilia (Greek: Βίλια; formerly Eidyllia, Ειδυλλία) is a village and a former municipality of West Attica, Greece.

[4] The municipal unit Vilia covers the mountainous northwestern part of Attica, and has a land area of 144.851 km2.

[5] The main mountain ranges are Cithaeron (1,409 m) in the northwest and Pastra in the northeast.

The village Vilia, the largest in the municipal unit, lies in the easternmost part, at the southeastern foot of Cithaeron.

The municipal unit's largest villages are Vilia (pop.