| Arnac | |
| Commune Status: | Commune |
| Arrondissement: | Aurillac |
| Canton: | Saint-Paul-des-Landes |
| Insee: | 15011 |
| Postal Code: | 15150 |
| Mayor: | Michel Cabanes[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Châtaigneraie Cantalienne |
| Coordinates: | 45.0589°N 2.2339°W |
| Elevation M: | 620 |
| Elevation Min M: | 360 |
| Elevation Max M: | 671 |
| Area Km2: | 20.15 |
Arnac (in French pronounced as /aʁnak/; Occitan (post 1500);: Arnac) is a commune in the Cantal department in south-central France.
The Maronne river and the Enchanet reservoir form the commune's northern border.