| Mexy | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Mexy 54.svg |
| Arrondissement: | Briey |
| Canton: | Longwy |
| Insee: | 54367 |
| Postal Code: | 54135 |
| Mayor: | Frédéric Wilmin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Grand Longwy Agglomération |
| Coordinates: | 49.5019°N 5.7792°W |
| Elevation M: | 372 |
| Elevation Min M: | 267 |
| Elevation Max M: | 393 |
| Area Km2: | 4.9 |
Mexy (in French pronounced as /mɛksi/) is a commune in the Meurthe-et-Moselle department in north-eastern France.