| Costanzana | |
| Official Name: | Comune di Costanzana |
| Coordinates: | 45.2358°N 8.3697°W |
| Region: | Piedmont |
| Province: | Vercelli (VC) |
| Mayor: | Raffaella Oppezzo |
| Area Total Km2: | 21.1 |
| Population Footnotes: | [1] |
| Population Total: | 847 |
| Population As Of: | Dec. 2004 |
| Population Demonym: | Costanzanesi |
| Elevation M: | 129 |
| Postal Code: | 13033 |
| Area Code: | 0161 |
Costanzana is a comune (municipality) in the Province of Vercelli in the Italian region Piedmont, located about 60km (40miles) northeast of Turin and about 10km (10miles) southwest of Vercelli.