| Cornillac | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Cornillac (26).svg |
| Arrondissement: | Nyons |
| Canton: | Nyons et Baronnies |
| Insee: | 26104 |
| Postal Code: | 26510 |
| Mayor: | Yoann Gronchi[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.4439°N 5.3869°W |
| Elevation Min M: | 471 |
| Elevation Max M: | 1455 |
| Area Km2: | 19.44 |
Cornillac (in French pronounced as /kɔʁnijak/; Occitan (post 1500);: Cornilhac) is a commune in the Drôme department in southeastern France.