Pielavesi (Finnish pronunciation: [ˈpie̯lɑˌʋesi]) is a municipality of Finland. It is part of the North Savo region. The municipality has a population of 3,873 (31 December 2025) and covers an area of 1,406.51 square kilometres (543.06 sq mi) of which 253.27 km² (97.79 sq mi) is water. The population density is 3.36 inhabitants per square kilometre (8.7/sq mi). The municipality is unilingually Finnish.

The birchbark horns in the coat of arms are reminiscent of the times when they were used for signaling in a settlement that spread over large forest areas. They were also used to scare forest predators away from cattle while they were grazing in forest pastures. The golden trefoil crosses refers to the parts of three old church parishes that formed the Pielavesi parish. The coat of arms was designed by Ahti Hammar and Niilo Toikkanen, and was approved by the Pielavesi Municipal Council on July 26 and December 15, 1953. The Ministry of the Interior confirmed the coat of arms for use on January 23, 1954.

Neighbouring municipalities are Iisalmi, Keitele, Kiuruvesi, Maaninka, Pihtipudas, Pyhäjärvi, and Tervo.

On the north-western side of the village lies Lake Pielavesi.

Pielavesi is also well-known for its successful volleyball club, Pielaveden Sampo.

Media related to Pielavesi at Wikimedia Commons Pielavesi travel guide from Wikivoyage