| Yoncq | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Yoncq.svg |
| Arrondissement: | Sedan |
| Canton: | Carignan |
| Insee: | 08502 |
| Postal Code: | 08210 |
| Mayor: | Marie-Pascale Ponsignon[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Portes du Luxembourg |
| Coordinates: | 49.5669°N 5.0169°W |
| Elevation M: | 180 |
| Area Km2: | 15.5 |
Yoncq (in French pronounced as /jɔ̃k/) is a commune in the Ardennes department in the Grand Est region in northern France.