| Sestu | |
| Official Name: | Comune di Sestu |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 39.3°N 15°W |
| Region: | Sardinia |
| Metropolitan City: | Cagliari (CA) |
| Frazioni: | Cortexandra |
| Mayor: | Maria Paola Secci |
| Area Total Km2: | 48.32 |
| Population Footnotes: | [1] |
| Population Total: | 20542 |
| Population As Of: | 31 Dec 2014 |
| Population Demonym: | Sestesi |
| Elevation M: | 44 |
| Postal Code: | 09028 |
| Area Code: | 070 |
Sestu is a comune (municipality) in the Metropolitan City of Cagliari in the Italian region Sardinia, located about 10km (10miles) north of Cagliari.