| Casteldelfino | |
| Official Name: | Comune di Casteldelfino |
| Coordinates: | 44.5833°N 11°W |
| Region: | Piedmont |
| Province: | Cuneo (CN) |
| Frazioni: | Torrette, Bertines, Serre, Alboin, Pusterle, Rabioux |
| Mayor: | Alberto Anello |
| Area Total Km2: | 33.95 |
| Population Footnotes: | [1] |
| Population Total: | 158 |
| Population As Of: | 1-1-2017 |
| Population Demonym: | Casteldelfinese(i) |
| Elevation M: | 1296 |
| Postal Code: | 12020 |
| Area Code: | 0175 |
Casteldelfino is a comune (municipality) in the Province of Cuneo in the Italian region Piedmont, located about 70km (40miles) southwest of Turin and about 45km (28miles) northwest of Cuneo. Casteldelfino borders the following municipalities: Bellino, Elva, Oncino, Pontechianale, and Sampeyre. It is located in the upper Varaita Valley.