| Guamaggiore | |
| Official Name: | Comune di Guamaggiore |
| Native Name: | Gomajori |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 39.5667°N 13°W |
| Region: | Sardinia |
| Mayor: | Antonio Cappai |
| Area Total Km2: | 16.8 |
| Population Total: | 1047 |
| Population As Of: | 31 November 2009[1] |
| Postal Code: | 09040 |
| Area Code: | 070 |
Guamaggiore, Gomajori or Goi Maiori in sardinian language, is a comune (municipality) in the Province of South Sardinia in the Italian region Sardinia, located about 40km (30miles) north of Cagliari. Guamaggiore borders the following municipalities: Gesico, Guasila, Ortacesus, Selegas. It is home to the Gothic church of St. Peter, dating to the 13th-14th century.