| La Cassaigne | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de La Cassaigne (11).svg |
| Arrondissement: | Carcassonne |
| Canton: | La Piège au Razès |
| Insee: | 11072 |
| Postal Code: | 11270 |
| Mayor: | Benjamin Peyras[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.2036°N 1.9944°W |
| Elevation M: | 253 |
| Elevation Min M: | 209 |
| Elevation Max M: | 410 |
| Area Km2: | 12.13 |
La Cassaigne (in French pronounced as /la kasɛɲ/; Occitan (post 1500);: La Cassanha) is a commune in the Aude department in southern France. It lies 749km (465miles) south of Paris.