| Gaja-et-Villedieu | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Gaja-et-Villedieu 11.svg |
| Arrondissement: | Limoux |
| Canton: | La Région Limouxine |
| Insee: | 11158 |
| Postal Code: | 11300 |
| Mayor: | Hélène Mas[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Limouxin |
| Coordinates: | 43.0822°N 2.1878°W |
| Elevation M: | 150 |
| Elevation Min M: | 167 |
| Elevation Max M: | 305 |
| Area Km2: | 7.75 |
Gaja-et-Villedieu (pronounced as /fr/; oc|Gajan e Viladieus) is a commune in the Aude department in southern France.