Abū al-Ḥasan ʿUbayd Allāh ibn al-Ḥusayn al-Karkhī (Arabic: أبو الحسن الكرخي; 260–340 AH / 874–951 CE) was a prominent 10th-century Islamic jurist and scholar of the Hanafi school during the Islamic Golden Age. He is best known for authoring Usul al-fiqh (commonly called Uṣūl al-Karkhī), the earliest surviving Hanafi treatise on legal theory, which distilled thirty-nine key maxims for Hanafi jurisprudence. His work profoundly influenced later Hanafi scholarship.Encyclopaedia of Islam, 2nd edition. Brill.Schacht, Joseph (1964). An Introduction to Islamic Law. Oxford University Press. pp. 29–31.Hallaq, Wael B. (1997). A History of Islamic Legal Theories. Cambridge University Press. p. 34.Ben-Shemesh, Aharon (1967). Taxation in Islam. Brill Archive. pp. 12–15.
Early life Al-Karkhī was born in Karkh, a district of Baghdad, in 260 AH (874 CE). He grew up in a family connected to Abbasid Caliphate scholarly circles. Early on, he displayed interest in both religious studies and Fiqh.
Career and scholarship Al-Karkhī studied under prominent scholars of the Hanafi school, including the successors of Abu Hanifa. He authored Usul al-fiqh: Uṣūl al-Karkhī, one of the earliest comprehensive works on Hanafi legal theory. His treatise codified Hanafi legal maxims (qawāʿid fiqhiyya), which served as a framework for Islamic jurisprudence and influenced generations of jurists.
Notable works Usul al-fiqh: Uṣūl al-Karkhī – foundational Hanafi legal treatise Commentaries on Hadith compilations (mostly lost)
Influence Al-Karkhī's doctrines shaped later Hanafi jurisprudence. His students and followers, including Al-Quduri and Abu Hafs Umar al-Nasafi, transmitted his legal opinions widely. His principles remain influential in Hanafi seminaries.
See also Hanafi Islamic Golden Age Abbasid Caliphate Fiqh
References