| Chaix | |
| Image Coat Of Arms: | Blason Chaix.svg |
| Arrondissement: | Fontenay-le-Comte |
| Canton: | Fontenay-le-Comte |
| Commune: | Auchay-sur-Vendée |
| Insee: | 85044 |
| Postal Code: | 85200 |
| Coordinates: | 46.4333°N -0.8542°W |
| Elevation Min M: | 2 |
| Elevation Max M: | 37 |
| Area Km2: | 7.37 |
| Population: | 481 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Chaix is a former commune in the Vendée department in the Pays de la Loire region in western France. On 1 January 2017, it was merged into the new commune Auchay-sur-Vendée.[2]