| Saint-Martin-des-Fontaines | |
| Commune Status: | Commune |
| Arrondissement: | Fontenay-le-Comte |
| Canton: | La Châtaigneraie |
| Insee: | 85245 |
| Postal Code: | 85570 |
| Mayor: | Philippe Hernandez[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 46.5417°N -0.9033°W |
| Elevation Min M: | 35 |
| Elevation Max M: | 87 |
| Area Km2: | 5.64 |
Saint-Martin-des-Fontaines (in French pronounced as /sɛ̃ maʁtɛ̃ de fɔ̃tɛn/) is a commune in the Vendée department in the Pays de la Loire region in western France.
The river Smagne forms all of the commune's northern border.