| Le Vivier-sur-Mer | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Le Vivier-sur-Mer.svg |
| Coordinates: | 48.6028°N -1.7731°W |
| Insee: | 35361 |
| Postal Code: | 35960 |
| Arrondissement: | Saint-Malo |
| Canton: | Dol-de-Bretagne |
| Mayor: | Carole Cerveau[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de Dol et Baie du Mont Saint-Michel |
| Elevation Min M: | 3 |
| Elevation Max M: | 8 |
| Area Km2: | 2.24 |
| Image Flag: | Flag of Le Vivier-sur-Mer.gif |
Le Vivier-sur-Mer (pronounced as /fr/, literally Le Vivier on Sea; br|Gwiver; Gallo: Le Vivier) is a commune in the Ille-et-Vilaine department of Brittany in north-western France.
Inhabitants of Le Vivier-sur-Mer are called in French vivarais.