| San Nazzaro Sesia | |
| Official Name: | Comune di San Nazzaro Sesia |
| Coordinates: | 45.4333°N 33°W |
| Region: | Piedmont |
| Province: | Novara (NO) |
| Mayor: | Stefano Zanzola |
| Area Total Km2: | 11.5 |
| Population Total: | 712 |
| Population As Of: | 31 March 2009[1] |
| Population Demonym: | Sannazaresi |
| Elevation M: | 153 |
| Postal Code: | 28060 |
| Area Code: | 0321 |
San Nazzaro Sesia is a comune (municipality) in the Province of Novara in the Italian region Piedmont, located about 70km (40miles) northeast of Turin and about 15km (09miles) west of Novara.
San Nazzaro Sesia borders the following municipalities: Albano Vercellese, Biandrate, Casalbeltrame, Casalvolone, Greggio, Oldenico, Recetto, and Villata. It is home to the Abbey of San Nazzaro e Celso, one of the most important Romanesque complexes in Piedmont.