| Montagagne | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Girons |
| Canton: | Couserans Est |
| Insee: | 09196 |
| Postal Code: | 09240 |
| Mayor: | Céline Malgat[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 42.9761°N 1.4114°W |
| Elevation M: | 900 |
| Elevation Min M: | 469 |
| Elevation Max M: | 1386 |
| Area Km2: | 7.06 |
Montagagne (in French pronounced as /mɔ̃taɡaɲ/; Occitan (post 1500);: Montaganha) is a commune in the Ariège department in southwestern France.