| Cavallirio | |
| Official Name: | Comune di Cavallirio |
| Coordinates: | 45.55°N 31°W |
| Region: | Piedmont |
| Province: | Novara (NO) |
| Frazioni: | Stoccada, Polera, Villa, Piatè, Suloro, Cademarco |
| Mayor: | Vito D'Aguanno |
| Area Total Km2: | 8.1 |
| Population Footnotes: | [1] |
| Population Total: | 1254 |
| Population As Of: | Dec. 2004 |
| Population Demonym: | Cavalliresi |
| Elevation M: | 367 |
| Postal Code: | 28010 |
| Area Code: | 0163 |
Cavallirio is a comune (municipality) in the Province of Novara in the Italian region Piedmont, located about 80km (50miles) northeast of Turin and about 20km (10miles) northwest of Novara.
Cavallirio borders the following municipalities: Boca, Cureggio, Fontaneto d'Agogna, Prato Sesia, and Romagnano Sesia.