Hemsedal is a municipality in Buskerud 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.