Rui is a village in Tinn Municipality, in Telemark, Norway. Rui lies at 663 m above sea level, in the Blefjell mountains. The nearest city is Kongsberg, 43 km to the east. Among the landmarks around are Vemork (29 km), Rollag Stave Church (21 km) and Flesberg Stave Church (23 km). Among the natural features are Rjukan Falls (30 km) and Bletoppen (11.3 km).