Abū al-Ḥasan ʻAlī ibn ʻAbdillāh ibn Jaʻfar al-Madīnī (778 CE/161 AH – 849/234) (Arabic: أبو الحسن علي بن عبد الله بن جعفر المديني) was a ninth-century Sunni Islamic scholar who was influential in the science of hadith.

[5] Ibn al-Madīnī was born in the year 778 CE/161 AH in Basra, Iraq to a family with roots in Medina now in Saudi Arabia.

[4] Ibn al-Madīnī specialized in the disciplines of hadith, biographical evaluation and al-ʻIlal, hidden defects, in the sanad, chain of narration.

Al-Dhahabī lauded Ibn al-Madīnī as an imām and as exemplary to subsequent scholars in the field in hadith, a description he considered tarnished by Ibn al-Madīnī's adopted position in the theological inquisition of the ninth century.

[4][6] Al-Nawawī said Ibn al-Madīnī authored approximately 200 works some on subjects not previously written about and many not since superseded.