Al-Zubayr Rahma Mansur (Arabic: 塈?堬堥?堭 堭堶?堜 ??媯?堭?? was a Sudanese Arab slave trader in the late 19th-century. He later became a pasha and Sudanese governor.

His reputation as a nemesis of General Charles Gordon meant he was bestowed a near-mythic status in England, where he was referred to as 'the richest and worst', a 'Slaver King' 'who [had] chained lions as part of his escort'.