| Saint-Benoist-sur-Mer | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Benoist-sur-Mer (Vendée).svg |
| Arrondissement: | Les Sables-d'Olonne |
| Canton: | Mareuil-sur-Lay-Dissais |
| Insee: | 85201 |
| Postal Code: | 85540 |
| Mayor: | Daniel Neau[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 46.4244°N -1.3532°W |
| Elevation Min M: | 1 |
| Elevation Max M: | 26 |
| Area Km2: | 15.53 |
Saint-Benoist-sur-Mer (in French pronounced as /sɛ̃ bənwa syʁ mɛʁ/, literally Saint Benoist on sea) is a commune in the Vendée department in the Pays de la Loire region in western France.
The river Lay forms most of the commune's south-eastern border.