Jämijärvi is a municipality of Finland. It is located in the province of Western Finland and is part of the Satakunta region. The municipality has a population of () and covers an area of of which is water. The population density is . The municipality is unilingually Finnish. Jämijärvi Airfield is one of the busiest general aviation airfields in Finland. A serious aviation accident happened in Jämijärvi in April 2014. References External links Municipality of Jämijärvi – Official website Municipalities of Satakunta Populated places established in 1865