| Bretteville-sur-Ay | |
| Commune Status: | Commune |
| Arrondissement: | Coutances |
| Canton: | Créances |
| Insee: | 50078 |
| Postal Code: | 50430 |
| Mayor: | Guy Closet[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.2611°N -1.6311°W |
| Elevation M: | 20 |
| Elevation Min M: | 4 |
| Elevation Max M: | 38 |
| Area Km2: | 9.75 |
Bretteville-sur-Ay (pronounced as /fr/) is a commune in the Manche department in Normandy in northwestern France.
Bretteville is twinned with the village of Sway, England.[2]