| Fontaine-le-Dun | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Fontaine-le-Dun.svg |
| Arrondissement: | Dieppe |
| Canton: | Saint-Valery-en-Caux |
| Insee: | 76272 |
| Postal Code: | 76740 |
| Mayor: | Philippe Etienne[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Côte d'Albâtre |
| Coordinates: | 49.8139°N 0.8508°W |
| Elevation M: | 60 |
| Elevation Min M: | 44 |
| Elevation Max M: | 100 |
| Area Km2: | 5.35 |
Fontaine-le-Dun (in French pronounced as /fɔ̃tɛn lə dœ̃/) is a commune in the Seine-Maritime department in the Normandy region in northern France.
Fontaine-le-Dun is a small farming town, with associated light industry, situated by the banks of the river Dun in the Pays de Caux, some 15miles southwest of Dieppe, at the junction of the D142 and the D79 roads.
Pierre Giffard, journalist, was born here in 1853.