Wikipedia
Mäntyharju (, "Pine Ridge") is a municipality of Finland.
It is located in the province of Eastern Finland and is part of the Southern Savonia region. The municipality has a population of and covers an area of of which is water. The coastline is almost . The population density is 6.2 inhabitants per km².
Neighbouring municipalities: Heinola, Hirvensalmi, Kouvola, Mikkeli, Pertunmaa and Savitaipale.
The summer houses or cottages located in the countryside are part of the culture of Finland where most Finnish families spend their summer holidays. Mäntyharju is the municipality which has the fifth most summer houses in Finland. Some of the reasons for Mäntyharju's popularity involves its many pure lakes and a relatively short distance to Helsinki. Because of the many summer houses, population of Mäntyharju more than doubles during the most popular summer holiday times.
Art Centre Salmela in Mäntyharju hosts one of Finland’s largest cultural events in July-August.
The municipality is unilingually Finnish.