| San Marco Argentano | |
| Official Name: | Comune di San Marco Argentano |
| Coordinates: | 39.55°N 23°W |
| Region: | Calabria |
| Province: | Cosenza (CS) |
| Mayor: | Virginia Mariotti |
| Area Total Km2: | 80.5 |
| Population Total: | 7419 |
| Population As Of: | 31 July 2018 |
| Population Demonym: | Sanmarchesi |
| Elevation M: | 426 |
| Saint: | St. Mark the Evangelist |
| Day: | April 25 |
| Postal Code: | 87018 |
| Area Code: | 0984 |
San Marco Argentano is a town and comune in the province of Cosenza in the Calabria region of southern Italy.
Main sights include the Norman tower, several churches and the ruins of an abbey, Santa Maria della Matina.
San Marco Argentano was the birthplace of Bohemond I of Antioch (1050s births), eldest son of Robert Guiscard and christened "Mark" at his baptism.