| San Gusmè | |
| Coordinates: | 43.3881°N 11.4975°W |
| Province: | Siena (SI) |
| Comune: | Castelnuovo Berardenga |
| Elevation M: | 461 |
| Population Total: | 239 |
| Population As Of: | 2011 |
| Gentilic: | Sangusmeini |
San Gusmè is a village in Tuscany, central Italy, administratively a frazione of the comune of Castelnuovo Berardenga, province of Siena. At the time of the 2001 census its population was 250.[1]
San Gusmè is about 23 km from Siena and 4 km from Castelnuovo Berardenga.