Urdalsgrend is a village in Tinn Municipality, in Telemark, Norway. Urdalsgrend lies at 259 m above sea level, at the foot of the Blefjell mountains. The nearest city is Kongsberg, 44 km to the east. Among the landmarks around are Vemork (26 km), Rjukan Line (14.4 km) and Heddal Stave Church (34 km). Among the natural features are Rjukan Falls (27 km) and Bletoppen (12.7 km).