| Marssac-sur-Tarn | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Marssac-sur-Tarn (Tarn).svg |
| Arrondissement: | Albi |
| Canton: | Albi-3 |
| Insee: | 81156 |
| Postal Code: | 81150 |
| Mayor: | Anne-Marie Rosé[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Albigeois |
| Coordinates: | 43.9183°N 2.0292°W |
| Elevation M: | 148 |
| Elevation Min M: | 135 |
| Elevation Max M: | 167 |
| Area Km2: | 7.17 |
Marssac-sur-Tarn (in French pronounced as /maʁsak syʁ taʁn/, literally Marssac on Tarn; Occitan (post 1500);: Marçac de Tarn) is a commune in the Tarn department in southern France.
Marssac-sur-Tarn station has rail connections to Toulouse, Albi and Rodez.