Östersund Municipality Östersund Municipality (Swedish: Östersunds kommun , Southern Sami: Staaren tjïelte ) is a municipality in Jämtland County in northern Sweden. The municipality seat is located in the town of Östersund , which is also the county seat of Jämtland County. At the end of 2021 the population of the municipality was 64,324. The present municipality was formed in 1971 by the a...