Sayyed Abdul Aziz al-Hakim (Arabic: سید عبد العزيز الحكيم‎) (1950 - August 26, 2009 in Tehran, Iran) was an Iraqi theologian and politician and the leader of Islamic Supreme Council of Iraq, the largest political party in the Iraqi Council of Representatives.

He was a member of the United States-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.

He was born in 1953, the son of Grand Ayatollah Muhsin Al-Hakim. Raised in Najaf and then received his theological education through the religious school there, known as the Hawza. He was married to the daughter of Mohammed Hadi al-Sadr and he was the father of two girls and two boys. His son Muhsin Abdul Aziz al-Hakim was a political adviser for him while his other son Ammar al-Hakim is the Secretary General of Al-Mihrab Martyr Foundation. Seven of Abdul Aziz al-Hakim brothers have been killed, six of them on the orders of Saddam Hussein.