Louvain may refer to:
- Leuven or Louvain, the capital of the province of Flemish Brabant in the Flemish Region, Belgium
- Louvain-la-Neuve, a planned city in the municipality of Ottignies-Louvain-la-Neuve, Belgium
- The Louvain method, a method to detect communities in graphs.
- Catholic University of Leuven, a prominent university in Belgium founded in 1425 and split in 1968
- Old University of Louvain, a university founded in Leuven, Brabant, in 1425 and closed in 1797
- Université catholique de Louvain, a French-speaking university in Louvain-la-Neuve and in Brussels
- Katholieke Universiteit Leuven or Louvain, a Dutch-speaking university in Flanders, Belgium