| Marliac | |
| Commune Status: | Commune |
| Arrondissement: | Muret |
| Canton: | Auterive |
| Insee: | 31319 |
| Postal Code: | 31550 |
| Mayor: | Pierre-Yves Caillat[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.2283°N 1.4758°W |
| Elevation M: | 260 |
| Elevation Min M: | 250 |
| Elevation Max M: | 369 |
| Area Km2: | 7.2 |
Marliac (pronounced as /fr/; oc|Marlhac) is a commune in the Haute-Garonne department in southwestern France.
The commune is bordered by six communes, one in Haute-Garonne, and five in Ariège: Gaillac-Toulza to the northwest, and finally by the department of Ariège to the northeast, east, southeast, south, and southwest by the communes of Canté, Brie, Justiniac, Durfort, and Villeneuve-du-Latou.