Saint-Léger (; also unofficial Saint-Léger-en-Gaume; ) is a municipality of Wallonia located in the province of Luxembourg, Belgium.
On 1 January 2022 the municipality, which covers 35.86 km<sup>2</sup>, had 3,735 inhabitants, giving a population density of 104.0 inhabitants per km<sup>2</sup>.
The municipality consists of the districts of Châtillon, Meix-le-Tige, and Saint-Léger. There is a Spar supermarket near the town center.
Transport
Saint-Léger is not served by any highways. The closes highway entrance is exit 31 of the E25/E411 highway (Brussels/Liège - Luxembourg) in neighbouring Arlon. There is one major national road that passes Saint-Léger from southwest to northeast. This is the N82 from Virton to the provincial capital Arlon. All N-roads are maintained by the Walloon government. The following roads cross the municipality:
- N82: Virton - Saint-Léger - Châtillon - Arlon
- N813: Aubange - Meix-le-Teige - Châtillon - Étalle
Saint-Léger is served by the Walloon transport authority TEC with following bus lines:
- 19/191: Virton - Saint-Léger - Châtillon - Arlon
- 199: Saint-Mard - Virton - Saint-Léger - Châtillon - Arlon
- 20/201: Châtillon - Meix-le-Teige - Rachecourt - Arlon
- 391: Saint-Léger - Ruette - Virton
- 731: Saint-Léger - Châtillon - Meix-le-Teige - Athus
There are no railway lines passing Saint-Léger. The closest train station is in Virton, 11.5 km to the southwest. The closest airport with commercial service is Luxembourg Airport 40.5 km east.