| Vallon-en-Sully | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Vallon-en-Sully.svg |
| Arrondissement: | Montluçon |
| Canton: | Huriel |
| Insee: | 03297 |
| Postal Code: | 03190 |
| Mayor: | Mohammed Kemih[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Val de Cher |
| Coordinates: | 46.5369°N 2.6089°W |
| Elevation M: | 180 |
| Elevation Min M: | 167 |
| Elevation Max M: | 280 |
| Area Km2: | 38.02 |
Vallon-en-Sully (in French pronounced as /valɔ̃ ɑ̃ syli/) is a commune in the Allier department in Auvergne-Rhône-Alpes in central France.
It is home to a host of beautiful châteaux (i.e. castles), with the most notable being Le Creux.