| Montreuil-sur-Barse | |
| Commune Status: | Commune |
| Arrondissement: | Troyes |
| Canton: | Vendeuvre-sur-Barse |
| Insee: | 10255 |
| Postal Code: | 10270 |
| Mayor: | Philippe Sauvage[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Troyes Champagne Métropole |
| Coordinates: | 48.2256°N 4.2953°W |
| Elevation M: | 143 |
| Area Km2: | 13.13 |
Montreuil-sur-Barse (pronounced as /fr/, literally Montreuil on Barse) is a commune in the Aube department in north-central France.
The Barse flows through the commune.