Suomenniemi is south of the eastern Finnish countryside Savo on the border with South Karelia 46 km south of the center of Mikkeli and 61 kilometers northwest of Lappeenranta. The former municipality of Suomenniemi is rural and has an area of 363.0 square kilometers (of which 79.2 kilometers inland waters). The population of the municipality was last 752 (as at 31 December 2012). The population density was thus only 2.7 inhabitants per square kilometer. At the time of its incorporation was measured Suomenniemi of population, the smallest town on the Finnish mainland. In addition Suomenniemi one of the few communities without municipal center ( taajama ). Main place of Suomenniemi is the same church village, which lies at the northern end of the Kuolimo Lake. In the East has Suomenniemi share of Finland's largest lake, Saimaa. For the former municipality also includes the villages Kakkola, Karkaus, Kiesilä, Laamalansaari, Luotolahti, Lyytikkälä, Pajulahti, Pukkila, Suomenkylä and Sydänmaa.
Suomenniemi was from 1689 a chapel community of Savitaipale. 1866, the village was elevated to an independent parish. At the beginning of 2013 Suomenniemi was incorporated along with Ristiina in the city of Mikkeli. During his municipal autonomy Suomenniemi belonged to the landscape of South Karelia, through the incorporation of it moved to Southern Savonia.
The attractions of Suomenniemi include Built in 1866 wooden church, around 5000 years old rock paintings at the Hill Louhtovuori, the Museum houses in Lyytikkälä, the mill in Hujala and the scenic road in Karkaus ( Karkauksentie ), the Südkarelische Milky Way.