| Duilhac-sous-Peyrepertuse | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Île-de-France moderne 1.svg |
| Arrondissement: | Narbonne |
| Canton: | Les Corbières |
| Insee: | 11123 |
| Postal Code: | 11350 |
| Mayor: | Alex Rainero[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 42.8639°N 2.5672°W |
| Elevation M: | 380 |
| Elevation Min M: | 233 |
| Elevation Max M: | 966 |
| Area Km2: | 21.09 |
Duilhac-sous-Peyrepertuse (pronounced as /fr/; Languedocien: Dulhac jos Pèirapertusa) is a commune in the Aude department in southern France.