| San Marcellino | |
| Official Name: | Comune di San Marcellino |
| Coordinates: | 40.9833°N 25°W |
| Region: | Campania |
| Province: | Caserta (CE) |
| Mayor: | Anacleto Colombiano mayor from (06/06/16) |
| Area Total Km2: | 4.6 |
| Population Footnotes: | [1] |
| Population Total: | 13308 |
| Population As Of: | 31 December 2010 |
| Population Demonym: | Sammarcellinesi |
| Elevation M: | 68 |
| Postal Code: | 81030 |
| Area Code: | 081 |
San Marcellino is a comune (municipality) in the Province of Caserta in the Italian region Campania, located about 20km (10miles) northwest of Naples and about 15km (09miles) southwest of Caserta.
San Marcellino borders the following municipalities: Aversa, Casapesenna, Frignano, Trentola-Ducenta, Villa di Briano.