| Selargius | |
| Official Name: | Comune di Selargius |
| Native Name: | Ceraxius |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 39.25°N 19°W |
| Region: | Sardinia |
| Metropolitan City: | Cagliari (CA) |
| Frazioni: | Is Corrias, Su Pezzu Mannu, Su Planu |
| Mayor: | Pier Luigi Concu |
| Area Total Km2: | 26.67 |
| Population Footnotes: | [1] |
| Population Total: | 28905 |
| Population As Of: | 28 February 2017 |
| Population Demonym: | Sardinian: Ceraxinus (sc) Italian: Selargini (sc) |
| Elevation M: | 10 |
| Istat: | 092068 |
| Postal Code: | 09047 |
| Area Code: | 070 |
Selargius, Ceràrgius or Ceraxius[2] in Sardinian, is a comune (municipality) in the Metropolitan City of Cagliari in the Italian region Sardinia, located about 6km (04miles) northeast of Cagliari., it has a population of 28,905.
The village exists since the Middle Ages as part of the Cagliari Campidanu part of the Giudicato of Cagliari. In 1928 it was merged by the Cagliari commune but gained again its autonomy in 1947, after a local referendum. Selargius is part of the Cagliari metropolitan area.
Selargius borders the following municipalities: Cagliari, Monserrato, Quartu Sant'Elena, Quartucciu, Sestu, Settimo San Pietro.