Belvaux (Luxembourgish: Bieles pronounced [ˈbiələs], German: Beles) is a town in the commune of Sanem, in south-western Luxembourg. As of 2005, the town has a population of 5,113. It is the administrative centre of Sanem commune. Belvaux is the twelfth-largest town in Luxembourg, and the largest not to have a commune named after it.

Bieles Primary School in 2004

Coordinates: 49°31′N 5°56′E / 49.517°N 5.933°E / 49.517; 5.933