| Vernajoul | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Vernajoul (Ariège).svg |
| Arrondissement: | Foix |
| Canton: | Val d'Ariège |
| Insee: | 09329 |
| Postal Code: | 09000 |
| Mayor: | Jean-Paul Ferré[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Pays Foix-Varilhes |
| Coordinates: | 42.9875°N 1.6075°W |
| Elevation M: | 414 |
| Elevation Min M: | 359 |
| Elevation Max M: | 724 |
| Area Km2: | 9.08 |
Vernajoul (in French pronounced as /vɛʁnaʒul/; Occitan (post 1500);: Vernajol) is a commune in the Ariège department in southwestern France.
Inhabitants of Vernajoul are called Vernajoulois.