| Vadenay | |
| Commune Status: | Commune |
| Arrondissement: | Châlons-en-Champagne |
| Canton: | Mourmelon-Vesle et Monts de Champagne |
| Insee: | 51587 |
| Postal Code: | 51400 |
| Mayor: | Bertrand Dubois[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Châlons-en-Champagne |
| Coordinates: | 49.0725°N 4.4006°W |
| Elevation M: | 126 |
| Area Km2: | 19.65 |
Vadenay (in French pronounced as /vadnɛ/) is a commune in the Marne department in north-eastern France.