| Monlezun | |
| Commune Status: | Commune |
| Arrondissement: | Mirande |
| Canton: | Pardiac-Rivière-Basse |
| Insee: | 32273 |
| Postal Code: | 32230 |
| Mayor: | Patricia Pascal[1] |
| Term: | 2023 - 2026 |
| Intercommunality: | Bastides et vallons du Gers |
| Coordinates: | 43.5008°N 0.2139°W |
| Elevation M: | 252 |
| Elevation Min M: | 155 |
| Elevation Max M: | 260 |
| Area Km2: | 17.35 |
Monlezun (in French pronounced as /mɔ̃ləzœ̃/; Occitan (post 1500);: Montlesun) is a commune in the Gers department in southwestern France.