| Castanet | |
| Commune Status: | Commune |
| Arrondissement: | Montauban |
| Canton: | Quercy-Rouergue |
| Insee: | 82029 |
| Postal Code: | 82160 |
| Mayor: | Michel Tabarly[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Quercy Rouergue et des gorges de l'Aveyron |
| Coordinates: | 44.2675°N 1.9508°W |
| Elevation M: | 450 |
| Elevation Min M: | 252 |
| Elevation Max M: | 506 |
| Area Km2: | 22.07 |
Castanet is a commune in the Tarn-et-Garonne department in the Occitanie region in southern France.