Tuanku Sir Syed Harun Putra ibni Almarhum Syed Hassan Jamalullail KCMG (Jawi: توانكو سر سيد هارون ڤوترا ابن المرحوم سيد حسن جمل الليل; 25 November 1920 – 16 April 2000) was the Raja of Perlis from 1945 until his death in 2000, and the third Yang di-Pertuan Agong (King of Malaysia), from 1960 to 1965.

[4] Succession to the Perlisian throne was not automatic and an heir presumptive had to be confirmed in that post by the State Council comprising the raja and several others.

[11] Syed Putra was at the time serving in the judiciary in Kuala Lumpur and had been advised by Sultan Musa Ghiatuddin Riayat Shah of Selangor to remain there.

He lived in a hut near the Arau railway station and received a monthly allowance of $90 from Raja Syed Alwi but this ceased on the latter's death.

[13] On 29 March 1945 he left for Kelantan, the home state of his consort Tengku Budriah, where he sold cakes and sundry goods for a living.

[20] Raja Syed Putra was elected Deputy Yang di-Pertuan Agong by the Malay rulers and served in that office from 14 April 1960 until the death of Sultan Hisamuddin Alam Shah on 1 September 1960.

His son, Tuanku Syed Sirajuddin was elected as the 12th Yang di-Pertuan Agong and served from 2001 to 2006 after the death of the incumbent, Sultan Salahuddin Abdul Aziz Shah.

Raja Syed Putra's term of office as Yang di-Pertuan Agong was marked by the Indonesia–Malaysia confrontation between newly created Malaysia and its larger neighbour, Indonesia.

[21] As Yang di-Pertuan Agong, he instructed proper treatment of the royal regalia, which he believed was partly responsible for the mysterious illness and death of Sultan Hisamuddin of Selangor, his immediate predecessor.