| Martagny | |
| Commune Status: | Commune |
| Arrondissement: | Les Andelys |
| Canton: | Romilly-sur-Andelle |
| Insee: | 27392 |
| Postal Code: | 27150 |
| Mayor: | Laurent Lainé[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Vexin Normand |
| Coordinates: | 49.3958°N 1.6603°W |
| Elevation M: | 121 |
| Elevation Min M: | 95 |
| Elevation Max M: | 177 |
| Area Km2: | 4.38 |
Martagny (in French pronounced as /maʁtaɲi/) is a commune in the Eure department in Normandy in northern France.