| Unchair | |
| Commune Status: | Commune |
| Arrondissement: | Reims |
| Canton: | Fismes-Montagne de Reims |
| Insee: | 51586 |
| Postal Code: | 51170 |
| Mayor: | Marcel Bencivengo[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CU Grand Reims |
| Coordinates: | 49.2911°N 3.7483°W |
| Elevation M: | 75 |
| Area Km2: | 3.73 |
Unchair (in French pronounced as /œ̃ʃɛʁ/) is a commune in the Marne department in north-eastern France.