| Saint-Léger-sous-Brienne | |
| Commune Status: | Commune |
| Arrondissement: | Bar-sur-Aube |
| Canton: | Brienne-le-Château |
| Insee: | 10345 |
| Postal Code: | 10500 |
| Mayor: | Didier Partout[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 48.4047°N 4.5039°W |
| Elevation M: | 120 |
| Area Km2: | 13.52 |
Saint-Léger-sous-Brienne (in French pronounced as /sɛ̃ leʒe su bʁijɛn/, literally Saint-Léger under Brienne) is a commune in the Aube department in north-central France.