Wellin (French pronunciation: [wɛlɛ̃]; Walloon: Welin) is a municipality of Wallonia located in the province of Luxembourg, Belgium.

On 1 January 2007 the municipality, which covers 67.52 km2, had 2,958 inhabitants, giving a population density of 43.8 inhabitants per km2.

The municipality consists of the following districts: Chanly, Halma, Lomprez, Sohier, and Wellin.

Other population centers include: Barzin, Froidlieu, Fays-Famenne, and Neupont.

This Belgian Luxembourg location article is a stub.