| West Athens | |
| Name Local: | Περιφερειακή ενότητα Δυτικού Τομέα Αθηνών |
| Type: | regional unit |
| Caption Skyline: | Municipalities of West Athens |
| Coordinates: | 38.0167°N 64°W |
| Periph: | Attica |
| Seat: | Peristeri |
| Area: | 66.7 |
| Population: | 478883 |
| Population As Of: | 2021 |
| Postal Code: | 12x xx, 13x xx |
| Area Code: | 210 |
West Athens (Greek, Modern (1453-);: Δυτικός Τομέας Αθηνών) is one of the regional units of Greece. It is part of the region of Attica. The regional unit covers the west-central part of the agglomeration of Athens.
As a part of the 2011 Kallikratis government reform, the regional unit West Athens was created out of part of the former Athens Prefecture. It is subdivided into 7 municipalities. These are (number as in the map in the infobox):[1]