| Tosny | |
| Arrondissement: | Les Andelys |
| Canton: | Gaillon |
| Commune: | Les Trois Lacs |
| Insee: | 27647 |
| Postal Code: | 27700 |
| Coordinates: | 49.2186°N 1.3736°W |
| Elevation M: | 32 |
| Elevation Min M: | 7 |
| Elevation Max M: | 78 |
| Area Km2: | 15.02 |
| Population: | 627 |
| Population Date: | 2018 |
| Population Footnotes: | [1] |
Tosny (in French pronounced as /toni/) is a former commune in the Eure department in Normandy in northern France, some ten miles south of Rouen. On 1 January 2017, it was merged into the new commune Les Trois Lacs.[2]