Allai (Sardinian: Àllai) is a village and comune (municipality) in the Province of Oristano in the autonomous island region of Sardinia in Italy, located about 80 kilometres (50 mi) north of Cagliari and about 25 kilometres (16 mi) east of Oristano. It has 333 inhabitants.

Allai borders the municipalities of Busachi, Fordongianus, Ruinas, Samugheo, Siamanna, Siapiccia, and Villaurbana.

Demographics

As of 2026, the population is 333, of which 51.1% are male, and 48.9% are female. Minors make up 9.3% of the population, and seniors make up 33.9%.

YearPop.±%
Historical population
YearPop.±%1861657—1871661+0.6%1881689+4.2%1901645−6.4%1911699+8.4%1921661−5.4%1931679+2.7%1936667−1.8%YearPop.±%1951752+12.7%1961783+4.1%1971601−23.2%1981513−14.6%1991466−9.2%2001413−11.4%2011370−10.4%2021358−3.2%
1861657
1871661+0.6%
1881689+4.2%
1901645−6.4%
1911699+8.4%
1921661−5.4%
1931679+2.7%
1936667−1.8%
YearPop.±%
1951752+12.7%
1961783+4.1%
1971601−23.2%
1981513−14.6%
1991466−9.2%
2001413−11.4%
2011370−10.4%
2021358−3.2%
Source: ISTAT

Immigration

As of 2025, of the known countries of birth of 331 residents, the most numerous are: Italy (317 – 95.8%), Germany (10 – 3%).