| Le Mesnil-Garnier | |
| Commune Status: | Commune |
| Arrondissement: | Coutances |
| Canton: | Quettreville-sur-Sienne |
| Insee: | 50311 |
| Postal Code: | 50450 |
| Mayor: | Sylvie Lemoine[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Coutances Mer et Bocage |
| Coordinates: | 48.8658°N -1.3083°W |
| Elevation M: | 30 |
| Elevation Min M: | 73 |
| Elevation Max M: | 166 |
| Area Km2: | 10.41 |
Le Mesnil-Garnier (in French pronounced as /lə mɛnil ɡaʁnje/) is a commune in the Manche department in Normandy in north-western France.