Sayyed Abdul Aziz al-Hakim is an Iraqi theologian and politician and the leader of SIIC, the largest political party in the Iraqi Council of Representatives.

He was a member of the U.S.-appointed Iraqi Governing Council and served as its president in December 2003. Brother of the Shia leader Mohammed Baqir al-Hakim, he replaced him as leader of the Supreme Council for the Islamic Revolution in Iraq when Mohammed Baqir was assassinated in August 2003 in Najaf.