Jämsä is a town and municipality of Finland. It is located in the Central Finland region, about 58 kilometres southwest of Jyväskylä. The municipality has a population of 19,281, which make it the second largest town of the Central Finland after Jyväskylä. It covers an area of 1,823.90 square kilometres of which 252.57 km2 is water. The population density is 12.27 inhabitants per square kilometre.
The municipality is officially Finnish-speaking.
Wikipedia https://en.wikipedia.org/wiki/Jämsä
Official Website https://www.jamsa.fi/
Coordinates 61°51'50.333" N 25°11'4.216" E