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.

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.