| Cernay | |
| Commune Status: | Commune |
| Arrondissement: | Châtellerault |
| Canton: | Loudun |
| Insee: | 86047 |
| Postal Code: | 86140 |
| Mayor: | Laurent Roy[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Grand Châtellerault |
| Coordinates: | 46.8344°N 0.3047°W |
| Elevation M: | 86 |
| Elevation Min M: | 74 |
| Elevation Max M: | 110 |
| Area Km2: | 3.29 |
Cernay (in French pronounced as /sɛʁnɛ/) is a commune in the Vienne department in the Nouvelle-Aquitaine region in western France.