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 4,664
(31 August 2024) 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
23.45 inhabitants per square kilometre (60.7/sq mi).
There are two Natura 2000 sites in Nousiainen: the Kurjenrahka National Park and the Rehtisuo Raised Bog.