| Montaigu | |
| Image Coat Of Arms: | Blason ville fr Montaigu (Vendée).svg |
| Coordinates: | 46.9736°N -1.3086°W |
| Arrondissement: | La Roche-sur-Yon |
| Canton: | Montaigu-Vendée |
| Commune: | Montaigu-Vendée |
| Elevation Min M: | 23 |
| Elevation Max M: | 57 |
| Elevation M: | 48 |
| Area Km2: | 3.03 |
| Population: | 5253 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
| Insee: | 85146 |
| Postal Code: | 85600 |
Montaigu (pronounced as /fr/) 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 new commune Montaigu-Vendée.[2]