| Castelnuovo Nigra | |
| Official Name: | Comune di Castelnuovo Nigra |
| Region: | Piedmont |
| Metropolitan City: | Turin (TO) |
| Mayor: | Danilo Giovanni Chiuminatti |
| Elevation M: | 828 |
| Area Total Km2: | 28.38 |
| Population Footnotes: | [1] |
| Population As Of: | 1-1-2017 |
| Population Total: | 434 |
| Population Demonym: | Salese(i) (Sale Castelnuovo) - Villese(i) (Villa Castelnuovo) |
| Saint: | St. Sebastian |
| Day: | 20 January |
| Coordinates: | 45.4333°N 49°W |
| Postal Code: | 10080 |
| Area Code: | 0124 |
Castelnuovo Nigra is a comune (municipality) in the Metropolitan City of Turin in the Italian region Piedmont, located about 40km (30miles) north of Turin. It is formed by the union of two villages: Sale Castelnuovo and Villa Castelnuovo