| Marsac | |
| Commune Status: | Commune |
| Arrondissement: | Castelsarrasin |
| Canton: | Garonne-Lomagne-Brulhois |
| Insee: | 82104 |
| Postal Code: | 82120 |
| Mayor: | André Auzeric[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.9436°N 0.8228°W |
| Elevation M: | 230 |
| Elevation Min M: | 80 |
| Elevation Max M: | 248 |
| Area Km2: | 14.89 |
Marsac (pronounced as /fr/; oc|Marçac) is a commune in the Tarn-et-Garonne department in the Occitanie region in southern France.