Holargos is a town and a suburb in the Athens urban area, Greece, located northeast of the Athens city proper and about 6 kilometers away from Syntagma Square. Since the 2011 local government reform it is part of the municipality Papagou-Cholargos, of which it is the seat and a municipal unit. The municipal unit has an area of 3.950 km2. The main thoroughfare is Mesogeion Avenue, which connects Cholargos with central Athens and the A6 motorway.