Gotland County (Gotlands län) is a county or län of Sweden. Gotland is located in the Baltic Sea to the east of Öland, and is the largest of Sweden's islands. Counties are usually sub-divided into municipalities, but Gotland County only consists of one municipality: Gotland Municipality. Gotland County is the only county in Sweden that is not governed by a county council. The municipality handles the tasks that are otherwise handled by the county council, mainly health care and public transport. Like other counties, Gotland has a County Administrative Board that oversees implementation of the Swedish state government. Both the County Administrative Board and the municipality have their seat in the largest city Visby, with over 22,000 inhabitants.