| Montviron | |
| Arrondissement: | Avranches |
| Canton: | Avranches |
| Insee: | 50355 |
| Postal Code: | 50530 |
| Commune: | Sartilly-Baie-Bocage |
| Coordinates: | 48.7383°N -1.4192°W |
| Elevation M: | 91 |
| Elevation Min M: | 27 |
| Elevation Max M: | 121 |
| Area Km2: | 5.91 |
| Population: | 340 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Montviron (in French pronounced as /mɔ̃viʁɔ̃/) is a former commune in the Manche department in Normandy in north-western France. On 1 January 2016, it was merged into the new commune of Sartilly-Baie-Bocage.[2]