Hemsedal is a municipality in Viken county, Norway. It is part of the traditional region of Hallingdal. The administrative centre of the municipality is the village of Trøym. Hemsedal lies on the Norwegian National Road 52 (Rv 52). Hemsedal is located 220 km (136.70 mi) northwest of Oslo and 273 km (169.63 mi) from Bergen. In 1897, Hemsedal was separated from the municipality of Gol to become a municipality of its own.
Skogshorn, also written Skogshødn, is a mountain in the municipality Hemsedal in the county Viken.
Trøym is a village and the site of the administrative center of Hemsedal municipality in Buskerud county, Norway.
Vavatn is a lake in the municipality of Hemsedal in Viken county, Norway. It is a water source for Gjuva kraftverk, a hydro-electric power plant, which utilizes the waterfall from the lake into the Gjuva river as it enters the valley of Grøndalen. The power station was put into operation in 1957 but was rehabilitated in 1995. The owner-operator is E- CO Energi.
Øljusjøen is a lake in the municipalities of Hemsedal (in Viken county) and Lærdal (in Vestland county), Norway. The 8.45-square-kilometre (3.26 sq mi) lake is located at an elevation of 1,335 metres (4,380 ft) above sea level. It sits about 15 kilometres (9.3 mi) southeast of the village of Borgund and the European route E16 highway. The lake Eldrevatnet is 4 kilometres (2.5 mi) to the north. The lake Juklevatnet and the mountain Høgeloft are both about 12 kilometres (7.5 mi) to the northeast.