Kymenlaakso.

2013

* Kiikoinen transferred from Satakunta to Pirkanmaa by merging with Sastamala.
* Suomenniemi transferred from South Karelia to South Savo by merging with Mikkeli.

2016

* Vaala transferred from Kainuu to North Ostrobothnia.

2021

* Heinävesi transferred from South Savo to North Karelia.
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