| Le Mont-Dieu | |
| Commune Status: | Commune |
| Arrondissement: | Sedan |
| Canton: | Vouziers |
| Insee: | 08300 |
| Postal Code: | 08390 |
| Mayor: | Anne Fraipont[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.5478°N 4.8664°W |
| Elevation M: | 200 |
| Elevation Min M: | 157 |
| Elevation Max M: | 325 |
| Area Km2: | 18.72 |
Le Mont-Dieu (in French pronounced as /lə mɔ̃ djø/) is a commune in the Ardennes department in northern France.