Imam Al-Hadi Abdulrahman al-Mahdi (1918–1971) was a Sudanese political and religious figure. He was a leader of the Sudanese Ansar religious order and was also the uncle of fellow Umma party politician Sadiq al-Mahdi. The Umma party was largely divided between 1966 and 1969 as a result of a split between Al-Hadi and Sadiq.