Fauvillers (; ; ; ) is a municipality of Wallonia located in the province of Luxembourg, Belgium.
On 1 January 2007 the municipality, which covers 74.11 km<sup>2</sup>, had 2,071 inhabitants, giving it a population density of 27.9 inhabitants per km<sup>2</sup>.
The municipality consists of the following districts: Fauvillers, Hollange, and Tintange. Other population centers include:
- Bodange
- Burnon
- Honville
- Hotte
- Malmaison
- Menufontaine
- Sainlez
- Strainchamps
- Warnach
- Wisembach