Al-ʿAzīz ʿUthmān ibn al-ʿĀdil (died 20 June 1233) was the Ayyubid ruler of Banyas from 1218 until his death.
[1] In 1219, with ʿIzz al-Dīn Aybak, he was left in charge of al-Muʿaẓẓam's Syrian principality when the latter went to join the Sultan al-Kāmil in Egypt against the Fifth Crusade.
After al-Muʿaẓẓam dismantled all of his fortresses west of the Jordan River, he gave the territory to al-ʿAzīz ʿUthmān.
This caused a rift between the two and al-ʿAzīz joined al-Kāmil with the army of Banyas at Nablus in August 1228, when the sultan was preparing to dispossess al-Nāṣir.
In 1230, al-ʿAzīz joined al-Ashraf's army that defeated the Khwarazmshah Jalāl al-Dīn at the battle of Yasi-chimen on 9 August.