| Merles-sur-Loison | |
| Commune Status: | Commune |
| Arrondissement: | Verdun |
| Canton: | Montmédy |
| Insee: | 55336 |
| Postal Code: | 55150 |
| Mayor: | Gérard Hauptmann[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Damvillers Spincourt |
| Coordinates: | 49.3794°N 5.4814°W |
| Elevation M: | 264 |
| Elevation Min M: | 197 |
| Elevation Max M: | 223 |
| Area Km2: | 11.45 |
Merles-sur-Loison (in French pronounced as /mɛʁl syʁ lwazɔ̃/) is a commune in the Meuse department in Grand Est in north-eastern France.