Östersund Municipality (Swedish: Östersunds kommun; Southern Sami: Staaren tjïelte) is a municipality in Jämtland County in northern Sweden. Its seat is located in Östersund, which is also the county seat of Jämtland County.
The present municipality was formed in 1971 by the amalgamation of the City of Östersund with five surrounding rural municipalities.
Östersund (pronounced [œstɛˈʂɵnːd] ; Southern Sami: Staare) is an urban area (city) in Jämtland in northern Sweden. It is the seat of Östersund Municipality and the capital of Jämtland County. Östersund is located at the shores of Sweden's fifth-largest lake, Storsjön, opposite the island Frösön. It is the only city in Jämtland. The northern part of the urban area is located inside of the municipality of Krokom.
Östersund is the region's cultural and economical centre and by tradition a city of trade and commerce. The city had one of the most extensive garrisons in Sweden prior to its closure in the early-21st century. Östersund is home to Mid Sweden University's largest campus site with approximately 7,000 students. With a total population of 50,960 (2017) Östersund is the 22nd most populous city in Sweden, the 46th most populous city in Scandinavia, and by far the largest inland city in Northern Sweden.