| Réaumur | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Réaumur (Vendée).svg |
| Arrondissement: | Fontenay-le-Comte |
| Canton: | Les Herbiers |
| Insee: | 85187 |
| Postal Code: | 85700 |
| Mayor: | Céline Reveau[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de Pouzauges |
| Coordinates: | 46.7203°N -0.8006°W |
| Elevation Min M: | 98 |
| Elevation Max M: | 187 |
| Area Km2: | 22.09 |
Réaumur (in French pronounced as /ʁeomyʁ/) is a commune in the Vendée department in the Pays de la Loire region in western France.
The village lies on the left bank of the Lay, which forms all of the commune's northern border.