| Saint-Marcet | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Gaudens |
| Canton: | Saint-Gaudens |
| Insee: | 31502 |
| Postal Code: | 31800 |
| Mayor: | Chantal Millet[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.1975°N 0.7394°W |
| Elevation M: | 410 |
| Elevation Min M: | 323 |
| Elevation Max M: | 464 |
| Area Km2: | 14.06 |
Saint-Marcet is a commune in the Haute-Garonne department in southwestern France.