Notodden is a town and municipality in Telemark county, Norway. It is part of the traditional region of Øst-Telemark. The administrative centre of the municipality is the town of Notodden.Notodden was separated from the municipality of Heddal in 1913 to become a separate town and municipality. On 1 January 1964, the rural municipalities of Heddal and Gransherad were merged into Notodden to form a new enlarged municipality.
Norway's biggest Stave church, Heddal stave church, can be seen a few kilometres from the town centre.Notodden Airport, Tuven, is located west of the city centre. Norsk Hydro was founded in this town. Notodden is famous for the annual Notodden Blues Festival, which is considered one of the best blues festivals in Europe, but they also have a famous metal festival called Motstøy Festivalen.