Treungen is a village in, and the administrative centre of Nissedal municipality, Telemark county in Norway. Located just east of the village Tveitsund, it is a part of the urban area of the same name, which has a population of 361 as of 1 January 2009. The village is the sole centre of population greater than 200 in the Nissedal municipality.
The Old Norse name for Treungen was ��ri�jungrinn�, meaning "a third part" and probably refers to an old division of the village.
Famous people from Treungen include Jan Gunnar Solli, international footballer
