| San Giuliano del Sannio | |
| Official Name: | Comune di San Giuliano del Sannio |
| Coordinates: | 41.45°N 52°W |
| Region: | Molise |
| Province: | Campobasso (CB) |
| Mayor: | Angelo Codagnone |
| Area Total Km2: | 24.05 |
| Population Footnotes: | [1] |
| Population Total: | 997 |
| Population As Of: | 30 November 2017 |
| Population Demonym: | Sangiulianesi |
| Elevation M: | 621 |
| Postal Code: | 86010 |
| Area Code: | 0874 |
San Giuliano del Sannio is a comune (municipality) in the Province of Campobasso in the Italian region Molise, located about 13km (08miles) south of Campobasso.
San Giuliano del Sannio borders the following municipalities: Cercepiccola, Guardiaregia, Mirabello Sannitico, Sepino, Vinchiaturo.