Sysmä

Sysmä
Municipality
Sysmän kunta
Sysmä kommun
Sunset at Lake Päijänne and Päijätsalo natural park
Location of Sysmä in Finland
Coordinates: 61°30′N 025°41′E / 61.500°N 25.683°E / 61.500; 25.683
Country Finland
RegionPäijänne Tavastia
Sub-regionHeinola
Founded1442
Government
  Municipal managerMarketta Kitkiöjoki
Area
 (2018-01-01)
  Total
936.18 km2 (361.46 sq mi)
  Land666.76 km2 (257.44 sq mi)
  Water269.14 km2 (103.92 sq mi)
  Rank128th largest in Finland
Population
 (2025-03-31)
  Total
3,406
  Rank204th largest in Finland
  Density5.11/km2 (13.2/sq mi)
Population by native language
  Finnish96.3% (official)
  Swedish0.3%
  Others3.4%
Population by age
  0 to 148.3%
  15 to 6448.4%
  65 or older43.2%
Time zoneUTC+02:00 (EET)
  Summer (DST)UTC+03:00 (EEST)
Websitesysma.fi

Sysmä (Finnish pronunciation: [ˈsysmæ]) is a municipality of Finland. It is situated in the Päijät-Häme region. The municipality has a population of 3,406 (31 March 2025) and covers an area of 936.18 square kilometres (361.46 sq mi) of which 269.14 km2 (103.92 sq mi) is water. The population density is 5.11 inhabitants per square kilometre (13.2/sq mi). Neighbouring municipalities are Asikkala, Hartola, Heinola, Kuhmoinen, Luhanka, and Padasjoki. The municipality is unilingually Finnish.

Itä-Häme newspaper is established in Sysmä.

According to historians, the word sysmä means either a "dark forest" or an "uninhabited wilderness." Sysmä is also a lake in Joroinen and another lake in Ilomantsi.