Tuanku Syed Harun Putra ibni Almarhum Syed Hassan Jamalullail, KCMG (25 November 1920 – 16 April 2000) was the third Yang di-Pertuan Agong of Malaysia of Federation of Malaya, and later of Malaysia (21 September 1960 – 20 September 1965), and sixth Raja of Perlis from (4 December 1945 – 16 April 2000).