| Unias | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Unias (Loire).svg |
| Arrondissement: | Montbrison |
| Canton: | Andrézieux-Bouthéon |
| Insee: | 42315 |
| Postal Code: | 42210 |
| Mayor: | Yves Duport[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Loire Forez Agglomération |
| Coordinates: | 45.6058°N 4.2283°W |
| Elevation M: | 418 |
| Elevation Min M: | 345 |
| Elevation Max M: | 371 |
| Area Km2: | 5.37 |
Unias (in French pronounced as /ynja/) is a commune in the Loire department in central France.