Haitham bin Tariq is a son of Sayyid Tariq bin Taimur, son of Sultan Taimur bin Feisal. Haitham has six brothers and two half-sisters (Amal and Nawwal who is the former wife of Sultan Qaboos). His brother Asa’ad bin Tariq is the Deputy Prime Minister for relations and international cooperation affairs and his brother Shihab bin Tariq is the Deputy Prime Minister for Defense Affairs (and the father of his daughter-in-law, Meyyan). His other brothers, Talal, Qais, Adham, and Faris, are all businessmen and are not involved in politics. He has four children, two sons and two daughters. His eldest son, Theyazin bin Haitham, is the crown prince of Oman.