| Thilay | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Thilay.svg |
| Arrondissement: | Charleville-Mézières |
| Canton: | Bogny-sur-Meuse |
| Insee: | 08448 |
| Postal Code: | 08800 |
| Mayor: | Nicole Jeannesson[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.8736°N 4.8081°W |
| Elevation M: | 375 |
| Elevation Min M: | 147 |
| Elevation Max M: | 492 |
| Area Km2: | 36.04 |
Thilay (in French pronounced as /tilˈɛ/) is a commune in the Ardennes department in northern France.