Östersund (; ) is an urban area (city) in Jämtland in the middle of 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 has the 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. The city was the only Swedish city founded and chartered in the 18th century. Östersund was founded in order to create a trade monopoly over Jämtland whose inhabitants' lucrative trade annoyed the Swedish Crown. The intention was to persuade the local farmers to deliver merchandise to middlemen in Östersund, but the population opposed this economic philosophy, and Östersund long remained small. It took until the end of the 19th century for Östersund to truly become a city, after the arrival of the railroad and the economic liberalization of that time. Östersund is situated in inland Scandinavia and connected to Sundsvall in the east on the Swedish coast, and Trondheim in the west at the shores of the Norwegian Sea. Östersund is located in the middle of Scandinavia, in the middle of Sweden, in the middle of Jämtland County and in the middle of Östersund Municipality. As the most centrally located city in Sweden, the city credits itself as the centre of Sweden. Östersund is marketed as – Winter City. Winter City as a project is run by the municipality together with city enterprises. While winters are long, the local climate is only moderately cold by elevated and northerly Swedish standards, but with chilly summers. Östersund has had a long history as a centre of outdoor activities with a modern cross-country ski stadium and an actual piste in the city itself. Östersund has also hosted several World Championships in various sports such as biathlon, speed skating and ski orienteering along with Swedish National Championships