| San Didero | |
| Official Name: | Comune di San Didero |
| Coordinates: | 45.1333°N 20°W |
| Region: | Piedmont |
| Metropolitan City: | Turin (TO) |
| Frazioni: | Volpi, Leitera |
| Mayor: | Sergio Lampo |
| Area Total Km2: | 3.3 |
| Population Footnotes: | [1] |
| Population Total: | 532 |
| Population As Of: | 31 July 2018 |
| Population Demonym: | Sandideresi |
| Elevation M: | 430 |
| Saint: | Desiderius of Langres |
| Day: | May 23 |
| Postal Code: | 10050 |
| Area Code: | 011 |
San Didero (San Didé, Sen Didé, French: Saint-Didier) is a comune (municipality) in the Metropolitan City of Turin in the Italian region Piedmont, located about 40 km west of Turin in the Val di Susa.