Ulefoss is located near the border between Telemark and Grenland. It occupies both sides of Ulefoss falls on the river Eidselva. Ulefoss is one of Norway's oldest industrial communities, with sawmill operations dating from the 1400s, with mining and ironworks operation from the 1600s. Ulefoss is still largely an industrial site with a number of people employed in these traditional industries. 
Ulefos Jernværk is an iron foundry located at Ulefoss. It was established in 1657 and produced pig iron until 1877. Wood-burning stoves were important products until the 1950s. Later, energy from the falls was used in the melting process for the production of iron. From 1999 the foundry has been owned by the holding company Ulefos AS. 
Ulefos Hovedgaard is an estate developed by industrialist Niels Aall as the summer residence. The manor house was completed in 1807 after a construction period of approximately 5 years. The estate has an Empire-style manor house built of slag stones which were taken from Ulefos Jærnverk. His son chamberlain Hans Aall (1805-1863) bought the manor and estate with funds inherited by his wife, the daughter of Diderik von Cappelen who died in 1828. Their descendants still own the surrounding forest properties, while the manor was turned over to a foundation. Today Ulefos Manor is operated by Telemark Museum. 
- Statistics Norway (2007). "Urban settlements. Population and area, by municipality. 1 January 2007".
- Svein-Gunnar Selland. "Ulefoss – tettsted". Store norske leksikon. Retrieved October 1, 2016.
- Svein-Gunnar Selland. "Ulefoss – foss". Store norske leksikon. Retrieved October 1, 2016.
- Svein-Gunnar Selland. "Eidselva – elv i Nome". Store norske leksikon. Retrieved October 1, 2016.
- Trond Gram. "Ulefos Jernværk". Store norske leksikon. Retrieved October 1, 2016.
- "Ulefos Hovedgaard". Telemark Museum. Retrieved October 1, 2016.
- Anne-Sofie Hjemdahl. "Telemark Museum". Store norske leksikon. Retrieved October 1, 2016.
- Store norske leksikon: Kanalen.
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