| Tonnac | |
| Commune Status: | Commune |
| Arrondissement: | Albi |
| Canton: | Carmaux-2 Vallée du Cérou |
| Insee: | 81300 |
| Postal Code: | 81170 |
| Mayor: | Jean-Paul Lalande[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Gaillac-Graulhet |
| Coordinates: | 44.0647°N 1.8686°W |
| Elevation M: | 320 |
| Elevation Min M: | 230 |
| Elevation Max M: | 523 |
| Area Km2: | 11.23 |
Tonnac (in French pronounced as /tɔnak/; Occitan (post 1500);: Totnac) is a commune in the Tarn department in southern France.