Riazuddin () may refer to:
Riazuddin (physicist) (1930–2013), Pakistani theoretical physicist Riazuddin (umpire) (1958–2019), Pakistani cricket umpire Hamza Riazuddin (born 1989), English cricketer Riyaz Uddin (painter), Indian miniature painter Begum Akhtar Riazuddin (born 1928) Shaikh Riazuddin (born 1971), Indian cricketer Riaz ud-Din (field hockey) (1942-2001), Pakistani Olympic hockey player