Affoltern District
| Affoltern District Bezirk Affoltern | |
|---|---|
| District | |
| Country | Switzerland | 
| Canton | Zürich | 
| Capital | Affoltern am Albis | 
| Area | |
|  • Total | 113.01 km2 (43.63 sq mi) | 
| Population  (31 December 2020) | |
|  • Total | 55,839 | 
| • Density | 490/km2 (1,300/sq mi) | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Municipalities | 14 | 
Affoltern District (also known as Knonaueramt or Säuliamt) is one of the twelve districts of the German-speaking canton of Zürich, Switzerland. Its capital is the city of Affoltern am Albis.