It is located in the Southern Savonia region, 43 kilometres (27 mi) northwest of Savonlinna and 92 kilometres (57 mi) northeast of Mikkeli.

The municipality has a population of 3,245 (31 December 2024)[6] and covers an area of 925.20 square kilometres (357.22 sq mi) of which 366.61 km2 (141.55 sq mi) is water.

[1] The population density is 5.8 inhabitants per square kilometre (15/sq mi).

Neighbouring municipalities are Joroinen, Juva, Savonlinna, Sulkava and Varkaus.

Asikkala, Osikonmäki, Putkisalo, Rantasalo, Torasalo, Tornioniemi, Tuusmäki and Vaahersalo.