| Cuy-Saint-Fiacre | |
| Commune Status: | Commune |
| Arrondissement: | Dieppe |
| Canton: | Gournay-en-Bray |
| Insee: | 76208 |
| Postal Code: | 76220 |
| Mayor: | Sabine Dieutre[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC 4 rivières |
| Coordinates: | 49.5133°N 1.6986°W |
| Elevation M: | 135 |
| Elevation Min M: | 93 |
| Elevation Max M: | 160 |
| Area Km2: | 9.63 |
Cuy-Saint-Fiacre is a commune in the Seine-Maritime department in the Normandy region in north-western France.
A farming village situated by the banks of the river Epte in the Pays de Bray, some 40miles east of Dieppe, at the junction of the D57, D916 and the D16 roads.