| Thilleux | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Dizier |
| Canton: | Wassy |
| Insee: | 52487 |
| Postal Code: | 52220 |
| Mayor: | Jean-Pierre Collin[1] |
| Term: | 2023 - 2026 |
| Intercommunality: | CA Saint-Dizier Der et Blaise |
| Coordinates: | 48.44°N 4.8025°W |
| Elevation M: | 145 |
| Elevation Min M: | 133 |
| Elevation Max M: | 174 |
| Area Km2: | 9.71 |
Thilleux (in French pronounced as /tijø/) is a commune in the Haute-Marne department in north-eastern France.