Jämijärvi is a municipality in the region of Lounais-Suomi. It is located in the province of Western Finland and is part of the Satakunta region. The municipality has a population of 1,806 (31 January 2019) and covers an area of 224.34 square kilometres (86.62 sq mi) of which 9.99 km2 (3.86 sq mi) is water. The population density is 8.43 inhabitants per square kilometre (21.8/sq mi).
The municipality is unilingually Finnish.
- JämijärviKko (2016)