| Chaillé-les-Marais | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Chaillé-les-Marais (Vendée).svg |
| Arrondissement: | Fontenay-le-Comte |
| Canton: | Luçon |
| Insee: | 85042 |
| Postal Code: | 85450 |
| Mayor: | Antoine Métais[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 46.3975°N -1.0214°W |
| Elevation Min M: | 0 |
| Elevation Max M: | 23 |
| Area Km2: | 39.96 |
Chaillé-les-Marais (in French pronounced as /ʃaje le maʁɛ/) is a commune in the Vendée department in the region of Pays de la Loire, western France.