Nousiainen
| Nousiainen Nousis | |
|---|---|
| Municipality | |
| Nousiaisten kunta Nousis kommun | |
| Nousiainen Church | |
| Location of Nousiainen in Finland | |
| Coordinates: 60°36′N 022°05′E / 60.600°N 22.083°E | |
| Country | Finland | 
| Region | Southwest Finland | 
| Sub-region | Turku sub-region | 
| Charter | 1867 | 
| Government | |
| • Municipal manager | Juhani Kylämäkilä | 
| Area  (2018-01-01) | |
|  • Total | 199.55 km2 (77.05 sq mi) | 
| • Land | 198.93 km2 (76.81 sq mi) | 
| • Water | 0.62 km2 (0.24 sq mi) | 
| • Rank | 263rd largest in Finland | 
| Population  (2025-03-31) | |
|  • Total | 4,676 | 
| • Rank | 174th largest in Finland | 
| • Density | 23.51/km2 (60.9/sq mi) | 
| Population by native language | |
| • Finnish | 95.6% (official) | 
| • Swedish | 0.8% | 
| • Others | 3.6% | 
| Population by age | |
| • 0 to 14 | 19% | 
| • 15 to 64 | 60.3% | 
| • 65 or older | 20.6% | 
| Time zone | UTC+02:00 (EET) | 
| • Summer (DST) | UTC+03:00 (EEST) | 
| Climate | Dfb | 
| Website | www.nousiainen.fi | 
Nousiainen (Finnish: [ˈnou̯siˌɑi̯nen]; Swedish: Nousis) is a municipality of Finland. It is located in the Southwest Finland region, 20 kilometres (12 mi) from Turku along Highway 8 (E8). The Finnish-speaking municipality has a population of 4,676 (31 March 2025) and covers an area of 199.55 square kilometres (77.05 sq mi) of which 0.62 km2 (0.24 sq mi) is water. The population density is 23.51 inhabitants per square kilometre (60.9/sq mi).
There are two Natura 2000 sites in Nousiainen: the Kurjenrahka National Park and the Rehtisuo Raised Bog.