| San Nazzaro | |
| Official Name: | Comune di San Nazzaro |
| Coordinates: | 41.05°N 66°W |
| Region: | Campania |
| Province: | Benevento (BN) |
| Mayor: | Luigi Pasquale Pepe |
| Area Total Km2: | 2.0 |
| Population Footnotes: | [1] |
| Population Total: | 877 |
| Population As Of: | 31 December 2007 |
| Population Demonym: | Sannazzareni |
| Postal Code: | 82010 |
| Area Code: | 0824 |
San Nazzaro is a comune (municipality) in the Province of Benevento in the Italian region Campania, located about 60 km northeast of Naples and about 12 km southeast of Benevento.
San Nazzaro borders the following comunes: Apice, Calvi, Mirabella Eclano, Pietradefusi, San Giorgio del Sannio, Venticano.
Up until 1958, San Nazzaro formed a single commune with present-day Calvi, named San Nazzaro Calvi.