Aigaleo or Egaleo ( Greek: Αιγάλεω ), and known in antiquity as Poikilon Oros (Ποικίλον Όρος), is a mountain in Athens, Attica, Greece. It lies west of Athens plain, southeast of Eleusis, and east of the island of Salamis. Most of the mountain is rocky (limestone). It is lower than Hymettus.

Aigaleo or Egaleo ( Greek: Αιγάλεω pronounced [eˈɣaleo]) is a suburban municipality in the western part of Athens. It takes its name from Mount Aigaleo.

The town is served by an Metro station: Egaleo metro station. The Motorway 1 (Piraeus-Thessaloniki) passes through the town. Aigaleo consists of the quarters Kato Aigaleo, Neo Aigaleo, Damarakia, Lioumi, Rosika, Agios Spyridonas and Agios Georgios.

The Cephissus river flows through the industrialized eastern part of the municipality; about 1/4 of its area is taken up by factory developments. The town is served by an Metro station: Egaleo metro station. The Motorway 1 (Piraeus-Thessaloniki) passes through the town.