Heusden-Zolder is a municipality located in the Belgian province of Limburg near Hasselt. On 1 January 2006 Heusden-Zolder had a total population of 30,769. The total area is 53.23 km² which gives a population density of 578 inhabitants per km².

Limburg, also known as Belgian Limburg, is a province in Belgium. It is the easternmost of the five Dutch-speaking provinces that together form the Region of Flanders, one of the three main political and cultural sub-divisions of modern-day Belgium.