| Ladern-sur-Lauquet | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Ladern-sur-Lauquet (Aude).svg |
| Arrondissement: | Limoux |
| Canton: | La Région Limouxine |
| Insee: | 11183 |
| Postal Code: | 11250 |
| Mayor: | Raymond Cabanne[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Limouxin |
| Coordinates: | 43.1058°N 2.3525°W |
| Elevation M: | 130 |
| Elevation Min M: | 176 |
| Elevation Max M: | 623 |
| Area Km2: | 24.64 |
Ladern-sur-Lauquet (pronounced as /fr/; oc|Ladèrn de Lauquet) is a commune in the Aude department in southern France.