Tunku Abdul Malik married Tengku Raudzah binti Almarhum Sultan Hisamuddin Alam Shah (b. 29 September 1929 – d. 21 September 2015), the daughter of
Sultan Hisamuddin Alam Shah of Selangor, on 16 July 1956 at Istana Bukit Kota,
Alor Setar. After his appointment as Raja Muda in 1981, Tengku Raudzah became the Raja Puan Muda. They had been married for 59 years until Tengku Raudzah's death on 21 September 2015, 3 days before her husband's 86th birthday and 8 days before her 86th birthday. He outlived both his wife and his eldest sister, Tunku Hamidah (b. 22 September 1925, who died the same year at the age of 90 on 4 November 2015) by two months. ==Death==