| Montoussin | |
| Commune Status: | Commune |
| Arrondissement: | Muret |
| Canton: | Cazères |
| Insee: | 31387 |
| Postal Code: | 31430 |
| Mayor: | Claude Peres[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.2767°N 1.0119°W |
| Elevation M: | 285 |
| Elevation Min M: | 254 |
| Elevation Max M: | 360 |
| Area Km2: | 4.83 |
Montoussin (in French pronounced as /mɔ̃tusɛ̃/; Occitan (post 1500);: Montossin) is a commune in the Haute-Garonne department of southwestern France.