| Sonnac-sur-l'Hers | |
| Commune Status: | Commune |
| Arrondissement: | Limoux |
| Canton: | La Haute-Vallée de l'Aude |
| Insee: | 11380 |
| Postal Code: | 11230 |
| Mayor: | Daniel Lefebvre[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.0047°N 1.9939°W |
| Elevation M: | 362 |
| Elevation Min M: | 344 |
| Elevation Max M: | 570 |
| Area Km2: | 13.74 |
Sonnac-sur-l'Hers (in French pronounced as /sɔnak syʁ lɛʁs/, literally Sonnac on the Hers; Occitan (post 1500);: Sonac) is a commune in the Aude department in southern France.