Ali ibn Yahya (Arabic: علي بن يحي) was the penultimate Zirid ruler of Ifriqiya, in 1116–1121 CE.
[1] Ali inherited the throne from his father, Yahya ibn Tamim, in 1116.
[1] He planned to launch attacks on the Italo-Norman Kingdom of Sicily, and sought the aid of the Almoravids for the purpose.
[1] This led to a series of clashes with the Normans in the decades after his death and culminating in the capture of the Zirid capital, Mahdia, in 1148.
[1] Ali's son, Abu'l-Hasan al-Hasan, was thus the last Zirid ruler.