Siuntio

Siuntio
Siuntio (Finnish)
Sjundeå (Swedish)
Municipality
Siuntion kunta
Sjundeå kommun
Motto: 
Ota rauhallisesti – Ta det lugnt
Location of Siuntio in Finland
Coordinates: 60°08′15″N 24°13′35″E / 60.13750°N 24.22639°E / 60.13750; 24.22639
Country Finland
RegionUusimaa
Sub-regionHelsinki sub-region
Year when first mentioned1382
SeatSiuntion asemanseutu
Government
 • Municipality managerInka Tikkanen
Area
 (2018-01-01)
 • Total
266.12 km2 (102.75 sq mi)
 • Land241.27 km2 (93.15 sq mi)
 • Water24.96 km2 (9.64 sq mi)
 • Rank249th largest in Finland
Population
 (2025-06-30)
 • Total
6,251
 • Rank151st largest in Finland
 • Density25.91/km2 (67.1/sq mi)
Population by native language
 • Finnish65.2% (official)
 • Swedish26.2% (official)
 • Others8.6%
Population by age
 • 0 to 1417.3%
 • 15 to 6463%
 • 65 or older19.7%
Time zoneUTC+02:00 (EET)
 • Summer (DST)UTC+03:00 (EEST)
ClimateDfb
Websitewww.siuntio.fi

Siuntio (Finnish: [ˈsiu̯ntio]; Swedish: Sjundeå) is a municipality in the Uusimaa region of Southern Finland. Its neighboring municipalities are Ingå to the west, Kirkkonummi to the east, Lohja to the north-west, and Vihti to the north. It is 46 kilometres (29 mi) west of Helsinki.

As of 2021, the population was 6,251 with a population density of 25.91 inhabitants per square kilometre (67.1/sq mi). The municipality covers an area of 266.12 square kilometres (102.75 sq mi), of which 24.96 km2 (9.64 sq mi) is water.

Siuntio is a bilingual municipality with Finnish and Swedish as its official languages. The population consists of 65% Finnish speakers, 26% Swedish speakers, and 9% speakers of other languages. Previously, the majority of the population spoke Swedish until the 1980s.

Siuntio's motto is "Ota rauhallisesti – Ta det lugnt", which means "take it easy" in Finnish and Swedish respectively. The municipality's rebranding program introduced the new motto along with a new logo in 2021.