Sultan Abdul Halim Mu'adzam Shah (28 November 1927 – 11 September 2017) was the 28th Sultan of Kedah Darul Aman. He was the of twice as the fifth Yang di-Pertuan Agong from 1970 to 1975 and the 14th Yang di-Pertuan Agong from 2011 to 2016. He was the second longest living monarch after Queen Elizabeth II prior to his demise in 2017.