Piraeus (regional unit)
| Piraeus Περιφερειακή ενότητα Πειραιώς | |
|---|---|
| Municipalities of Piraeus | |
| Coordinates: 37°58′N 23°38′E / 37.967°N 23.633°E | |
| Country | Greece | 
| Administrative region | Attica | 
| Seat | Piraeus | 
| Area | |
|  • Total | 50.4 km2 (19.5 sq mi) | 
| Population  (2021) | |
|  • Total | 448,051 | 
| • Density | 8,900/km2 (23,000/sq mi) | 
| Time zone | UTC+2 (EET) | 
| • Summer (DST) | UTC+3 (EEST) | 
| Area code(s) | 210 | 
Piraeus (/paɪˈriːəs, pɪˈreɪəs/ py-REE-əs, pirr-AY-əs; Greek: Περιφερειακή ενότητα Πειραιώς, romanized: Perifereiakí enótita Peiraiós), also sometimes called Greater Piraeus (as distinct from the City of Piraeus; Ευρύτερος Πειραιάς Evrýteros Peiraiás), 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 Athens urban area (or agglomeration).