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Sultan Hisamuddin Alam Shah Ibni Almarhum Sultan Alaeddin Sulaiman Shah KCMG was the second Yang di-Pertuan Agong (High King) of Malaya from 14 April to 1 September 1960, and fifth and seventh Sultan of Selangor between 1938-1942 and again from 1945-1960.
He was the first son of Almarhum Sultan Alauddin Sulaiman Shah ibni Almarhum Raja Muda Musa (1893–1938) by Cik Puan Hasnah binti Pilong, a commoner wife. Named Tengku Alam Shah at birth, he was not expected to succeed as he had two elder half-brothers.
Tengku Alam Shah was proclaimed Sultan on 4 April 1938, four days after the death of his father. On 26 January 1939, he was crowned at Istana Mahkota Puri in Klang. The Japanese occupation force removed him in November 1943, and proclaimed Tengku Musa Eddin as the new Sultan Musa Ghiatuddin Riayat Shah of Selangor. The return of the British finally brought Sultan Hisamuddin Alam Shah back to the throne, while ex-Sultan Musa was exiled to the Cocos Keeling Islands.
Sultan Alam Shah was elected second Yang di-Pertuan Agong or federal Paramount Ruler of independent Malaya (the present Malaysia before the accession of British North Borneo, Sarawak and Singapore in 1963) on the death of Tuanku Abdul Rahman. His term of office began on 14 April 1960. Sultan Hisamuddin Alam Shah died from an unidentified illness at Istana Negara in Kuala Lumpur on 1 September 1960, aged 62. | 
