| Onet-le-Château | |
| Commune Status: | Commune |
| Arrondissement: | Rodez |
| Canton: | Rodez-Onet |
| Insee: | 12176 |
| Postal Code: | 12850 |
| Mayor: | Jean-Philippe Kéroslian[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Rodez Agglomération |
| Coordinates: | 44.3664°N 2.5942°W |
| Elevation M: | 500 |
| Elevation Min M: | 524 |
| Elevation Max M: | 631 |
| Area Km2: | 40.2 |
Onet-le-Château (in French ɔnɛ l(ə) ʃɑto/; Occitan (post 1500);: Ònes) is a commune in the Aveyron department in southern France.