Wellen (Dutch pronunciation: ['ʋɛlə(n)] ⓘ; Limburgish: Wille) is a municipality located in the Belgian province of Limburg.

The municipality consists of the following sub-municipalities: Wellen, Berlingen, Herten and Ulbeek.

Other population centres and hamlets include: Bos, Beurs, Kukkelberg, Langenakker, Oetersloven, Overbroek, Russelt, and Vrolingen.

Archaeological findings suggest the place was inhabited already during the Frankish period (5th to 7th century).

Debris from the river Herk on that spot made the soil fertile for farming.