| Cubnezais | |
| Commune Status: | Commune |
| Arrondissement: | Blaye |
| Canton: | Le Nord-Gironde |
| Insee: | 33142 |
| Postal Code: | 33620 |
| Mayor: | Jean-Luc Desperiez[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Latitude Nord Gironde |
| Coordinates: | 45.0756°N -0.4067°W |
| Elevation M: | 45 |
| Elevation Min M: | 11 |
| Elevation Max M: | 61 |
| Area Km2: | 10.3 |
Cubnezais (in French pronounced as /kybnəzɛ/) is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.