| Gajan | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Girons |
| Canton: | Portes du Couserans |
| Insee: | 09128 |
| Postal Code: | 09190 |
| Mayor: | Nathalie Auriac[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.0336°N 1.1275°W |
| Elevation M: | 550 |
| Elevation Min M: | 365 |
| Elevation Max M: | 600 |
| Area Km2: | 8.17 |
Gajan (in French pronounced as /ɡaʒɑ̃/) is a commune in the Ariège department in southwestern France.