| Thiesi | |
| Official Name: | Comune di Thiesi |
| Native Name: | Tiesi |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 40.5167°N 51°W |
| Region: | Sardinia |
| Province: | Province of Sassari (SS) |
| Mayor: | Gianfranco Soletta (since 2020)[1] |
| Area Total Km2: | 63.83 |
| Population Footnotes: | [2] |
| Population Total: | 2717 |
| Population As Of: | 2024 |
| Population Demonym: | Thiesini |
| Elevation M: | 461 |
| Saint: | Saint Victoria |
| Day: | December 23 |
| Postal Code: | 07047 |
| Area Code: | 079 |
Thiesi (Sardinian: Tiesi) is a town and comune located in the northern province of Sassari, in Sardinia, Italy. It has a population of 2,717.