Abū Isḥāq Ibrāhīm ibn Sayyār ibn Hāni‘ an-Naẓẓām (Arabic: أبو إسحاق إبراهيم بن سيار بن هانئ النظام) (c. 775 – c. 845) was an Arab Mu'tazilite theologian and poet. He was a nephew of the Mu'tazilite theologian Abu al-Hudhayl al-'Allaf, and al-Jahiz was one of his students. Al-Naẓẓām served at the courts of the Abbasid Caliph al-Mamun. His theological doctrines and works are lost except for a few fragments.
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