| Roz-sur-Couesnon | |
| Commune Status: | Commune |
| Coordinates: | 48.5897°N -1.5914°W |
| Insee: | 35247 |
| Postal Code: | 35610 |
| Arrondissement: | Saint-Malo |
| Canton: | Dol-de-Bretagne |
| Mayor: | Christophe Fambon[1] |
| Term: | 2020 - 2026 |
| Elevation Min M: | 5 |
| Elevation Max M: | 97 |
| Area Km2: | 25.86 |
Roz-sur-Couesnon (in French pronounced as /ʁo syʁ kwenɔ̃/, literally Roz on Couesnon;) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.
Inhabitants of Roz-sur-Couesnon are called Rozéens in French.