| Saint-Marcel | |
| Official Name: | Comune di Saint-Marcel Commune de Saint-Marcel |
| Native Name: | 'en-Mar'i |
| Coordinates: | 45.7333°N 34°W |
| Province: | none |
| Frazioni: | Basses-Druges, Champremier, Crêtes, Druges, Enchésaz, Fontaney, Grand-Chaux, Grandjit, Layché, Mezein, Morges, Mulac, Plout, Pouriaz, Réan, Ronc, Sazaillan, Seissogne, Viplanaz |
| Area Total Km2: | 42 |
| Population Footnotes: | [1] |
| Population Total: | 1311 |
| Population As Of: | 31 December 2022 |
| Population Demonym: | Saint-marcelains |
| Elevation M: | 625 |
| Saint: | Pope Marcellus I |
| Day: | 16 January |
| Postal Code: | 11020 |
| Area Code: | 0165 |
| Istat: | 7060 |
Saint-Marcel (Valdôtain: 'en Mar'i) is a town and comune in the Aosta Valley region of north-western Italy.