| Alzen | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Girons |
| Canton: | Couserans Est |
| Insee: | 09009 |
| Postal Code: | 09240 |
| Mayor: | Christian Gabet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Couserans-Pyrénées |
| Coordinates: | 42.9903°N 1.4731°W |
| Elevation M: | 650 |
| Elevation Min M: | 430 |
| Elevation Max M: | 1173 |
| Area Km2: | 17.87 |
Alzen (pronounced as /fr/; oc|Alzenh) is a commune in the Ariège department in southwestern France.
Inhabitants of Alzen are called Alzenois.