| Saint-Germain-sur-Ay | |
| Commune Status: | Commune |
| Arrondissement: | Coutances |
| Canton: | Créances |
| Insee: | 50481 |
| Postal Code: | 50430 |
| Mayor: | Christophe Gilles[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.2358°N -1.5922°W |
| Elevation M: | 5 |
| Elevation Min M: | 0 |
| Elevation Max M: | 39 |
| Area Km2: | 14.52 |
Saint-Germain-sur-Ay (pronounced as /fr/) is a commune in the Manche department in Normandy in north-western France.[2] It is located at the mouth of the river Ay.