| Native name | Zelgu |
|---|---|
| Coordinates | 40°52′N 8°43′E |
| Region | Sardinia |
| Metropolitan city | Sassari (SS) |
| Mayor | Luca Ruzzu |
| Area total | 36.5 km² |
| Population total | 589 |
| Population as of | 30 November 2014 |
| Population demonym | Targulani or Zelgulani |
| Elevation | 284 m |
| Postal code | 07030 |
| Area code | 079 |
| Website | Official website |
Tergu (sdc: Zelgu) is a comune (municipality) in the Metropolitan City of Sassari in the Italian region Sardinia, located about 190 kilometres (120 mi) north of Cagliari and about 20 kilometres (12 mi) northeast of Sassari in the Anglona historical regiona.
It is home to the Romanesque church of Nostra Signora di Tergu.