Tervo is a municipality of Finland. It is located in the province of Eastern Finland and is part of the Northern Savonia region. The municipality has a population of (), making it Northern Savonia's least populous municipality. It covers an area of of which is water. The population density is . Neighbouring municipalities are Keitele, Kuopio, Maaninka, Pielavesi, Rautalampi, Suonenjoki, and Vesanto. 30% of its area is covered by water. Summer cottages are as prevalent as households. The municipality is unilingually Finnish. Marko Hietala, the bass player for Nightwish, is from Tervo. References External links Municipality of Tervo – Official website Populated places established in 1926