| Lyas | |
| Commune Status: | Commune |
| Arrondissement: | Privas |
| Canton: | Privas |
| Insee: | 07146 |
| Postal Code: | 07000 |
| Mayor: | François Veyreinc[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Privas Centre Ardèche |
| Coordinates: | 44.7403°N 4.6006°W |
| Elevation M: | 575 |
| Elevation Min M: | 220 |
| Elevation Max M: | 803 |
| Area Km2: | 7.95 |
Lyas (pronounced as /fr/; oc|Lias) is a commune in the Ardèche department in southern France.