Tinn Municipality

Tinn (Norwegian pronunciation:; locally) is a municipality in Telemark county, Norway. It is located in the traditional districts of Aust-Telemark which lies within the larger Upper Telemark region. The administrative centre of the municipality is the town of Rjukan. Some of the villages in Tinn include Atrå, Austbygde, Hovin, and Miland.

The 2,045.13-square-kilometre (789.63 sq mi) municipality is the 34th largest by area out of the 357 municipalities in Norway. Tinn Municipality is the 174th most populous municipality in Norway with a population of 5,515. The municipality's population density is 3 inhabitants per square kilometre (7.8/sq mi) and its population has decreased by 7.2% over the previous 10-year period.

The Krossobanen is the oldest aerial tramway in Northern Europe. It was built in 1928 as a gift from Norsk Hydro. The Hardangervidda National Park center is located at Skinnarbu on the southeastern shore of the lake Møsvatn in the far western part of the municipality.