Abdallah ibn Tahir
| Abdallah ibn Tahir al-Khurasani | |
|---|---|
| Emir of the Tahirid dynasty | |
| Reign | 828–845 |
| Predecessor | Talha ibn Tahir |
| Successor | Tahir ibn Abdallah |
| Born | 798 Iran |
| Died | 845 Nishapur |
| House | Tahirid |
| Father | Tahir ibn Husayn |
| Religion | Sunni Islam |
Abdallah ibn Tahir (Persian: عبدالله طاهر, Arabic: عبد الله بن طاهر الخراساني) (ca. 798–844/5) was the Tahirid governor of Khurasan from 828 until his death. He is perhaps the most famous of the Tahirids.
Abdallah's early career consisted serving with his father Tahir ibn Husayn in pacifying the lands of the Abbasid Caliphate following the civil war between al-Amin and al-Ma'mun. He later succeeded his father as governor of Al-Jazira, with the task of defeating the rebel Nasr ibn Shabath, and between 824 and 826 convinced Nasr to surrender. He was then sent to Egypt, where he successfully ended an uprising led by 'Abd-Allah ibn al-Sari. He also recovered Alexandria, which had been seized by Andalusian Muslim refugees seven years before; following their expulsion, the refugees headed to Byzantine Crete, establishing Muslim rule there for the first time.
Although Abdallah had been made the governor of Khurasan following his brother's death in 828, he only arrived in Nishapur in 830; in the meantime he had been busy fighting more revolts. He was assigned for a brief time in 829 to stop the Khurramite Babak, but then was given new orders by the caliph to move to Khurasan and stop the Kharijites. Abdallah's brother 'Ali acted as deputy governor of Khurasan until he was ready to take up residence in Nishapur.
During his reign as governor Abdallah was occupied with affairs on both the eastern and western parts of his territories. In the east, he took steps to improving the strength of the Samanids, his vassals in Transoxiana. The Samanids were important, as they controlled the trade between Central Asia and the central Caliphate, including the trade of Turkish slaves. Also in the east in 834 an Alid, Muhammad ibn al-Qasim, revolted in Juzjan, but Abdallah's forces eventually managed to capture him.
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