Korydallos is a town and municipality situated in the Piraeus regional unit of Greece, located in the southwestern portion of the Athens metropolitan area. As part of the greater Attica region, it serves as a residential component of the broader Athens agglomeration.
The municipality is positioned within the Piraeus administrative unit, which encompasses several communities in the western suburbs and port areas adjacent to Athens. Korydallos's location in the southwestern section of the metropolitan region places it among the outlying residential zones that form the broader urban sprawl of the Greek capital.