| Aucey-la-Plaine | |
| Commune Status: | Commune |
| Arrondissement: | Avranches |
| Canton: | Pontorson |
| Insee: | 50019 |
| Postal Code: | 50170 |
| Mayor: | Alain Bodin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Mont-Saint-Michel-Normandie |
| Coordinates: | 48.5281°N -1.4769°W |
| Elevation Min M: | 5 |
| Elevation Max M: | 61 |
| Area Km2: | 9.39 |
Aucey-la-Plaine (pronounced as /fr/) is a commune in the Manche department in the Normandy region in northwestern France.