| Saint-Martin-de-la-Porte | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Jean-de-Maurienne |
| Canton: | Modane |
| Insee: | 73258 |
| Postal Code: | 73140 |
| Mayor: | Guy Ratel[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Maurienne-Galibier |
| Coordinates: | 45.2408°N 6.4467°W |
| Elevation Min M: | 655 |
| Elevation Max M: | 2824 |
| Area Km2: | 19.25 |
Saint-Martin-de-la-Porte is a commune in the Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. It is best known as the location of one of the access points for the boring of the main tunnel of the Turin–Lyon high-speed railway.