| Olonne-sur-mer | |
| Arrondissement: | Les Sables-d'Olonne |
| Canton: | Les Sables-d'Olonne |
| Commune: | Les Sables-d'Olonne |
| Insee: | 85166 |
| Postal Code: | 85340 |
| Coordinates: | 46.5369°N -1.7717°W |
| Elevation Min M: | 0 |
| Elevation Max M: | 49 |
| Area Km2: | 45.34 |
| Population: | 15061 |
| Population Date: | 2017 |
| Population Footnotes: | [1] |
Olonne-sur-Mer (in French pronounced as /ɔlɔn syʁ mɛʁ/, literally Olonne on Sea) is a former commune in the Vendée department in the Pays de la Loire region in western France. On 1 January 2019, it was merged into the commune Les Sables-d'Olonne.[2] It is home to the basketball team Pays des Olonnes Basket, which plays its home games at the Salle Beauséjour.