| Les Authieux-sur-le-Port-Saint-Ouen | |
| Commune Status: | Commune |
| Arrondissement: | Rouen |
| Canton: | Darnétal |
| Insee: | 76039 |
| Postal Code: | 76520 |
| Mayor: | Marc Duflos[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Métropole Rouen Normandie |
| Coordinates: | 49.3411°N 1.1344°W |
| Elevation M: | 75 |
| Elevation Min M: | 2 |
| Elevation Max M: | 86 |
| Area Km2: | 4.53 |
Les Authieux-sur-le-Port-Saint-Ouen (pronounced as /fr/) is a commune in the Seine-Maritime department in the Normandy region in northern France.
A farming and forestry village situated by the banks of the river Seine, some 7miles south of Rouen, at the junction of the D7, D13 and the D91 roads.