| Nonio | |
| Official Name: | Comune di Nonio |
| Coordinates: | 45.8333°N 30°W |
| Region: | Piedmont |
| Province: | Province of Verbano-Cusio-Ossola (VB) |
| Mayor: | Pierugo Pirall |
| Area Total Km2: | 9.8 |
| Population Footnotes: | [1] |
| Population Total: | 855 |
| Population As Of: | 30 November 2017 |
| Population Demonym: | Noniesi |
| Elevation M: | 476 |
| Postal Code: | 28010 |
| Area Code: | 0323 |
Nonio is a comune (municipality) in the Province of Verbano-Cusio-Ossola in the Italian region Piedmont, located about 100km (100miles) northeast of Turin and about 15km (09miles) southwest of Verbania.
Nonio borders the following municipalities: Cesara, Omegna, Pella, Pettenasco, Quarna Sotto, Varallo.