| Fay-de-Bretagne | |
| Native Name: | (Gallo) |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Fay-de-Bretagne (Loire-Atlantique).svg |
| Arrondissement: | Châteaubriant-Ancenis |
| Canton: | La Chapelle-sur-Erdre |
| Insee: | 44056 |
| Postal Code: | 44130 |
| Mayor: | Claude Labarre[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Erdre et Gesvres |
| Coordinates: | 47.4156°N -1.7903°W |
| Elevation Min M: | 18 |
| Elevation Max M: | 87 |
| Area Km2: | 64.81 |
Fay-de-Bretagne (in French pronounced as /fɛ də bʁətaɲ/, literally Fay of Brittany; Gallo: Faè or Faï, Breton: Faouell) is a commune in the Loire-Atlantique department in western France.