| San Giovanni Suergiu | |
| Official Name: | Comune di San Giovanni Suergiu |
| Native Name: | Santu Giuanni Suergiu |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 39.1167°N 39°W |
| Region: | Sardinia |
| Province: | South Sardinia |
| Frazioni: | is Urigus, is Loccis, Palmas, Matzaccara, is Loccis Santus, is Cordeddas, Funtannona |
| Mayor: | Elvira Usai |
| Area Total Km2: | 70.6 |
| Population Total: | 6044 |
| Population As Of: | 31 December 2009[1] |
| Population Demonym: | Sangiovannesi or Santuannesus |
| Elevation M: | 16 |
| Saint: | St. John the Baptist |
| Day: | 24 June |
| Postal Code: | 09010 |
| Area Code: | 0781 |
San Giovanni Suergiu, Santu Giuanni de Suergiu in sardinian language, is a comune (municipality) in the Province of South Sardinia in the Italian region Sardinia, located about 50km (30miles) west of Cagliari and about 4km (02miles) south of Carbonia.
San Giovanni Suergiu borders the following municipalities: Carbonia, Giba, Portoscuso, Sant'Antioco, Tratalias.