| Cussac-sur-Loire | |
| Commune Status: | Commune |
| Arrondissement: | Le Puy-en-Velay |
| Canton: | Velay volcanique |
| Intercommunality: | CA du Puy-en-Velay |
| Mayor: | Rémi Barbe[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.9894°N 3.885°W |
| Elevation M: | 660 |
| Elevation Min M: | 647 |
| Elevation Max M: | 1069 |
| Area Km2: | 10.27 |
| Insee: | 43084 |
| Postal Code: | 43370 |
Cussac-sur-Loire (in French pronounced as /kysak syʁ lwaʁ/, literally Cussac on Loire; Occitan (post 1500);: Cuçac) is a commune in the Haute-Loire department in south-central France.