Tinn
| Tinn Municipality Tinn kommune | |
|---|---|
| Tind herred (historic name) | |
| View of Rjukan | |
|  | |
| Telemark within Norway | |
| Tinn within Telemark | |
| Coordinates: 60°0′33″N 8°33′34″E / 60.00917°N 8.55944°E | |
| Country | Norway | 
| County | Telemark | 
| District | Aust-Telemark | 
| Established | 1 Jan 1838 | 
| • Created as | Formannskapsdistrikt | 
| Administrative centre | Rjukan | 
| Government | |
| • Mayor (2023) | Kathrine Haatvedt (Ap) | 
| Area | |
|  • Total | 2,045.13 km2 (789.63 sq mi) | 
| • Land | 1,848.01 km2 (713.52 sq mi) | 
| • Water | 197.12 km2 (76.11 sq mi) 9.6% | 
| • Rank | #34 in Norway | 
| Population  (2023) | |
|  • Total | 5,546 | 
| • Rank | #172 in Norway | 
| • Density | 3/km2 (8/sq mi) | 
| • Change (10 years) | −7.1% | 
| Demonym | Tinndøl | 
| Official language | |
| • Norwegian form | Neutral | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| ISO 3166 code | NO-4026 | 
| Website | Official website | 
Tinn is a municipality in Telemark county, Norway. It is located in the traditional districts of Aust-Telemark and Upper Telemark. 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-square-kilometre (790 sq mi) municipality is the 34th largest by area out of the 356 municipalities in Norway. Tinn is the 172nd most populous municipality in Norway with a population of 5,546. The municipality's population density is 3 inhabitants per square kilometre (7.8/sq mi) and its population has decreased by 7.1% 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 the lake Møsvatn, just east of Tinn.