| Blombay | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Blombay.svg |
| Arrondissement: | Charleville-Mézières |
| Canton: | Rocroi |
| Insee: | 08071 |
| Postal Code: | 08260 |
| Mayor: | Nathalie Tavernier[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Vallées et Plateau d'Ardenne |
| Coordinates: | 49.8244°N 4.4531°W |
| Elevation M: | 285 |
| Elevation Min M: | 202 |
| Elevation Max M: | 301 |
| Area Km2: | 9.47 |
Blombay (in French pronounced as /blɔ̃bɛ/) is a commune in the Ardennes department in northern France.
The river Sormonne forms most part of the commune's northwestern border.