Ostersund is an urban area (city) in Jamtland in the middle of Sweden. It is the seat of Ostersund Municipality and the capital of Jamtland County. Ostersund is located at the shores of Sweden's fifth largest lake, Storsjon, opposite the island Froson, and is the only city in Jamtland. Ostersund is the region's cultural and economical centre and by tradition a city of trade and commerce. Ostersund had one of the most extensive garrisons in Sweden prior to its close down in the early 21st century. The city is the Mid Sweden University's largest campus site with approximately 7 000 students. With a total population of roughly 60,000 Ostersund is the 24th most populous city in Sweden, the 46th most populous city in Scandinavia, and by far the largest inland city in Northern Sweden.