The Université catholique de Louvain or UCLouvain is a Belgian French-speaking university with several sites in six Belgian cities. Since the adoption of its new name, it has brought together UCL and the Université Saint-Louis - Bruxelles.

Following the split of the Catholic University of Leuven into two legally independent entities (1968), most of the French-speaking university has been located in Louvain-la-Neuve (Walloon Brabant) since 1972, and in Woluwe-Saint-Lambert for the faculties of medicine, pharmacy, dentistry and biomedical sciences. The Dutch-speaking university remains in Leuven, under the name of Katholieke Universiteit Leuven (KU Leuven). It is one of Belgium's leading universities and is regularly cited as one of the world's top 150 universities.