| Allai | |
| Official Name: | Comune di Allai |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 39.95°N 60°W |
| Region: | Sardinia |
| Province: | Oristano (OR) |
| Mayor: | Antonio Pili |
| Area Total Km2: | 27.36 |
| Population Footnotes: | [1] |
| Population Total: | 364 |
| Population As Of: | 30 April 2017 |
| Population Demonyms: | Allaesi Allesus |
| Elevation M: | 60 |
| Postal Code: | 09080 |
| Area Code: | 0783 |
Allai (Sardinian: Àllai) is a comune (municipality) in the Province of Oristano in the Italian region Sardinia, located about 80km (50miles) north of Cagliari and about 25km (16miles) east of Oristano.
Allai borders the following municipalities: Busachi, Fordongianus, Ruinas, Samugheo, Siamanna, Siapiccia, Villaurbana.