Östersund is an urban area 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. From Wikipedia