Almarhum Sultan Salahuddin Abdul Aziz Shah Al-Haj Ibni Almarhum Sultan Hisamuddin Alam Shah Al-Haj was the eleventh Yang di-Pertuan Agong of Malaysia (Supreme Head of State) and eighth Sultan of Selangor.
Born Tengku Abdul Aziz Shah on 8 March 1926 at Istana Bandar Temasya, Kuala Langat, he is the eldest son of Sultan Hisamuddin Alam Shah Al-Haj ibni Almarhum Sultan Alaeddin Sulaiman Shah by his royal consort Tengku Ampuan Raja Jemaah binti Raja Ahmad. On the demise of his father, Sultan Hisamuddin Alam Shah Al-Haj ibni Almarhum Sultan Alaeddin Sulaiman Shah, Tengku Abdul Aziz Shah became the eighth Sultan of Selangor with the title Sultan Salahuddin Abdul Aziz Shah on 3 September 1960 and was installed as the 28th Sultan on 28 June 1961.
He was the oldest ruler to be elected as the eleventh Yang di-Pertuan Agong on 26 April 1999 and installed on 11 September 1999. However, after reigning for two years and 6 months, he died in office on 21 November 2001 at the Gleneagles Intan Medical Centre in Kuala Lumpur. He was buried in the Royal Mausoleum near Sultan Sulaiman Mosque in Klang.