| Champvallon | |
| Image Coat Of Arms: | Blason de la ville de Champvallon (89).svg |
| Coordinates: | 47.9353°N 3.3461°W |
| Insee: | 89078 |
| Postal Code: | 89710 |
| Arrondissement: | Auxerre |
| Canton: | Charny Orée de Puisaye |
| Commune: | Montholon |
| Elevation Min M: | 85 |
| Elevation Max M: | 217 |
| Area Km2: | 6.83 |
| Population: | 357 |
| Population Date: | 2021 |
| Population Footnotes: | [1] |
Champvallon (in French pronounced as /ʃɑ̃valɔ̃/) is a former commune in the Yonne department in Bourgogne-Franche-Comté in north-central France. On 1 January 2017, it was merged into the new commune Montholon.[2]