| Belval-sous-Châtillon | |
| Commune Status: | Commune |
| Arrondissement: | Épernay |
| Canton: | Dormans-Paysages de Champagne |
| Insee: | 51048 |
| Postal Code: | 51480 |
| Mayor: | Pascal Naillon[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.125°N 3.8531°W |
| Elevation M: | 189 |
| Area Km2: | 7.15 |
Belval-sous-Châtillon (in French pronounced as /bɛlval su ʃatijɔ̃/, literally Belval under Châtillon) is a commune in the Marne department in northeastern France.