| Mont-de-Marrast | |
| Commune Status: | Commune |
| Arrondissement: | Mirande |
| Canton: | Mirande-Astarac |
| Insee: | 32281 |
| Postal Code: | 32170 |
| Mayor: | Jean-Claude Laborie[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.3836°N 0.3592°W |
| Elevation M: | 280 |
| Elevation Min M: | 191 |
| Elevation Max M: | 304 |
| Area Km2: | 7 |
Mont-de-Marrast is a commune in the Gers department in southwestern France.