Alajärvi

Alajärvi
Town
Alajärven kaupunki
Alajärvi stad
Alajärvi Church
Location of Alajärvi in Finland
Coordinates: 63°00′N 023°49′E / 63.000°N 23.817°E / 63.000; 23.817
Country Finland
RegionSouth Ostrobothnia
Sub-regionJärviseutu
Charter1869
Town privileges1986
Government
  Town managerVesa Koivunen
Area
 (2018-01-01)
  Total
1,056.74 km2 (408.01 sq mi)
  Land1,008.77 km2 (389.49 sq mi)
  Water47.99 km2 (18.53 sq mi)
  Rank78th largest in Finland
Population
 (2025-03-31)
  Total
9,069
  Rank106th largest in Finland
  Density8.99/km2 (23.3/sq mi)
Population by native language
  Finnish94.9% (official)
  Swedish0.1%
  Others5%
Population by age
  0 to 1417.4%
  15 to 6454.3%
  65 or older28.3%
Time zoneUTC+02:00 (EET)
  Summer (DST)UTC+03:00 (EEST)
Websitealajarvi.fi

Alajärvi (Finnish pronunciation: [ˈɑlɑˌjærʋi]; lit.'lower lake') is a town and municipality of Finland. It is located in the South Ostrobothnia region. The town has a population of 9,069 (31 March 2025) and covers an area of 1,056.74 square kilometres (408.01 sq mi) of which 47.99 km2 (18.53 sq mi) is water. The population density is 8.99 inhabitants per square kilometre (23.3/sq mi). The town is unilingually Finnish.

The municipality of Lehtimäki was consolidated with Alajärvi on 1 January 2009.