The story
The area of modern Kyyjärvi was originally hunting grounds for Tavastian people. The village of Kyyjärvi was first mentioned in 1565 as Kÿierffuj, when it was a part of the parish of Rautalampi. In 1628, the parish of Laukaa, including Kyyjärvi, was split off from Rautalampi while in 1639, Kyyjärvi became a part of the new Saarijärvi parish established during this year.
In 1775, Kyyjärvi became one of the villages in the new chapel community of Karstula, which became its own parish in 1858. In 1913, it was decided that the territory of the Kyyjärvi school district should become its own municipality and parish. The municipality was established in 1929 while the parish was established in 1944.
Proposed Suomenselkä municipality
Kannonkoski, Karstula, Kivijärvi and Kyyjärvi planned to merge into the Suomenselkä municipality from January 1, 2022. Karstula, Kivijärvi and Kyyjärvi accepted the merger proposal, but Kannonkoski did not. After Kannonkoski left out of the planned merger, Kivijärvi also left out. The merger project of the remaining Karstula and Kyyjärvi failed at the Kyyjärvi municipal council meeting held on May 17, 2021, and the Ministry of Finance does not propose a forced merger either.
From Wikipedia’s article on Kyyjärvi, shared under CC BY-SA 4.0.4