Alí ibn Àhmad

Ali ibn Ahmad was the ninth Emir of Crete, reigning from .

The surviving records on the internal history and rulers of the Emirate of Crete are very fragmentary. He is tentatively identified as a son of the seventh emir, Ahmad ibn Umar, and as the great-great-grandson of the conqueror of Crete and founder of the emirate, Abu Hafs Umar. He is believed to have reigned from to , succeeding his brother Shu'ayb, and being succeeded by his nephew, Shu'ayb's son, Abd al-Aziz.

He was possibly the ruler of Crete in 949, when a large-scale, seaborne Byzantine expedition was sent against Crete, only for it to be comprehensively defeated by the Cretan Saracens.