Viesīte Municipality is a former municipality in Selonia, Latvia. The municipality was formed in 2009 by merging Elkšņi parish, Rite parish, Sauka parish and Viesīte town with its countryside territory, the administrative centre being Viesīte. In 2010 Viesīte parish was created from the countryside territory of Viesīte town. The population in 2020 was 3,500.