| Postua | |
| Official Name: | Comune di Postua |
| Coordinates: | 45.7167°N 22°W |
| Region: | Piedmont |
| Province: | Vercelli (VC) |
| Mayor: | Maria Cristina Patrosso |
| Area Total Km2: | 16.18 |
| Population Footnotes: | [1] |
| Population Total: | 590 |
| Population As Of: | 31 December 2010 |
| Population Demonym: | Postuesi |
| Elevation M: | 459 |
| Postal Code: | 13010 |
| Area Code: | 015 |
Postua is a comune (municipality) in the Province of Vercelli in the Italian region Piedmont, located about 80km (50miles) northeast of Turin and about 45km (28miles) northwest of Vercelli.
Postua borders the following municipalities: Ailoche, Borgosesia, Caprile, Guardabosone, Scopa, and Vocca.