| Marillet | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Marillet (Vendée).svg |
| Arrondissement: | Fontenay-le-Comte |
| Canton: | La Châtaigneraie |
| Insee: | 85136 |
| Postal Code: | 85240 |
| Mayor: | Ghislaine Lesauvage[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de la Châtaigneraie |
| Coordinates: | 46.5675°N -0.6344°W |
| Elevation Min M: | 64 |
| Elevation Max M: | 114 |
| Area Km2: | 4.25 |
Marillet (in French pronounced as /maʁijɛ/) is a commune in the Vendée department in the Pays de la Loire region in western France.
Marillet is the smallest commune in Vendée and is associated with the Puy-de-Serre and Faymoreau coal mines.