Punkaharju is a former municipality of Finland. It was consolidated with the town of Savonlinna on January 1, 2013.

It was located in the province of Eastern Finland and is part of the Southern Savonia region.

Finnish Forest Museum Lusto and the Finnish Forest Research Institute are located in Punkaharju, which hosts a research forest park open for visitors. In the park some of the tallest trees in the whole Finland can be found, for example pines in the height of 40 metres (130 ft). Punkaharju ridge is a famous national landscape protected by a national reserve.