| Simaxis | |
| Official Name: | Comune di Simaxis |
| Native Name: | Simaghis |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 39.9297°N 8.6897°W |
| Region: | Sardinia |
| Province: | Oristano (OR) |
| Mayor: | Giacomo Obinu |
| Area Total Km2: | 27.82 |
| Population Footnotes: | [1] |
| Population Total: | 2262 |
| Population As Of: | 30 September 2014 |
| Population Demonym: | Simaxesi, Simaghesi |
| Elevation M: | 7 |
| Postal Code: | 09088 |
| Area Code: | 0783 |
Simaxis (pronounced as /it/; Sardinian: Simaghis pronounced as /sc/[2] or Sardinian: Simaxis pronounced as /sc/) is a comune (municipality) in the Province of Oristano in the Italian region Sardinia, located about 90km (60miles) northwest of Cagliari and about 11km (07miles) northeast of Oristano.
Simaxis borders the following municipalities: Ollastra, Oristano, Siamanna, Siapiccia, Solarussa, Zerfaliu.