| Greggio | |
| Official Name: | Comune di Greggio |
| Coordinates: | 45.45°N 31°W |
| Region: | Piedmont |
| Province: | Vercelli (VC) |
| Mayor: | Claudio Trada |
| Area Total Km2: | 12.0 |
| Population Total: | 382 |
| Population As Of: | 31 March 2009[1] |
| Population Demonym: | Greggesi |
| Elevation M: | 161 |
| Postal Code: | 13030 |
| Area Code: | 0161 |
Greggio is a comune (municipality) in the Province of Vercelli in the Italian region Piedmont, located about 70km (40miles) northeast of Turin and about 15km (09miles) north of Vercelli.
Greggio borders the following municipalities: Albano Vercellese, Arborio, Recetto, San Nazzaro Sesia, and Villarboit.