| Saint-Vaast-Dieppedalle | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Vaast-Dieppedalle (Seine-Maritime).svg |
| Arrondissement: | Dieppe |
| Canton: | Saint-Valery-en-Caux |
| Insee: | 76653 |
| Postal Code: | 76450 |
| Mayor: | Sylvain Monnier[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Côte d'Albâtre |
| Coordinates: | 49.7558°N 0.7236°W |
| Elevation M: | 118 |
| Elevation Min M: | 61 |
| Elevation Max M: | 138 |
| Area Km2: | 12.15 |
Saint-Vaast-Dieppedalle is a commune in the Seine-Maritime department in the Normandy region in northern France.
A small farming village in the Pays de Caux, situated some 34miles northeast of Le Havre, at the junction of the D53, D420 and D250 roads.