Al-Sultan Al-Mu’tassimu Billahi Muhibbuddin Tuanku Al-Haj Abdul Halim Mu'adzam Shah ibni Almarhum Sultan Badlishah was Sultan of Kedah from 1958 until his death in 2017, the fifth Yang di-Pertuan Agong from 1970 to 1975, and again as the fourteenth from 2011 to 2016. He was the first and only ruler to reign as Yang di-Pertuan Agong twice, as well as the oldest elected to the office. Immediately prior to his death, he was the second longest-reigning living monarch in the world after Queen Elizabeth II of the United Kingdom.
Tunku Puan Besar Hajah Kurshiah binti Almarhum Tunku Besar Burhanuddin was the Tunku Ampuan Besar or Queen of Negeri Sembilan. She also served as the first Raja Permaisuri Agong of Malaya between 1957 and 1960.
Sultanah Hajah Bahiyah binti Almarhum Tuanku Abdul Rahman was the Sultanah of Malaysian State of Kedah from 1958 until her death in 2003 and served as the fifth Raja Permaisuri Agong of Malaysia from 21 September 1970 until 20 September 1975.
Tunku Abdul Malik ibni Almarhum Sultan Badlishah was the heir presumptive to the throne of Kedah. He was the son of Sultan Badlishah and the brother of the late ruler, Sultan Abdul Halim. He served as Regent of Kedah from 1970 to 1975.
Tunku Annuar ibni Almarhum Sultan Badlishah was a member of the Kedah royal family and the Chairman of the Regency Council of the Malaysian state of Kedah from December 2011 until his death in May 2014. He was the son of Sultan Badlishah and the half-brother of Sultan Abdul Halim.
Che Puan Besar Hajah Haminah binti Haji Hamidun, formerly known as Sultanah Haminah is the former Sultanah consort of Malaysian State of Kedah and the widow of Sultan Abdul Halim Mua'dzam Shah. Born a commoner from Bagan Serai, Perak, she married Sultan Abdul Halim on 25 December 1975 and as his second wife, she was styled as Her Highness The Che Puan of Kedah or equivalent the Princess consort. She was installed as the new Sultanah of Kedah on 9 January 2004 at the Balai Penghadapan Istana Anak Bukit following the death of Sultanah Bahiyah, the previous Sultanah and first wife of Sultan Abdul Halim. She served as the 14th Raja Permaisuri Agong of Malaysia from 2011 to 2016, during her husband's second term as Yang di-Pertuan Agong, the Malaysian federal head of state. After her husband's death in September 2017, his successor and her brother-in-law Sultan Sallehuddin, bestowed her the title Che Puan Besar of Kedah, roughly equivalent to a queen dowager.
The following is the orders, decorations, and medals given by Sultan of Kedah. When applicable, post-nominal letters and non-hereditary titles are indicated.
The Most Distinguished Family Order of Terengganu is an honorific order of the Sultanate of Terengganu.
The Most Illustrious Royal Family Order of Kedah is an honorific order of the Sultanate of Kedah.
The Most Esteemed Supreme Order of Sri Mahawangsa is an honorific order of the Sultanate of Kedah.
The Exalted Order of the Crown of Kedah is an honorific order of the Sultanate of Kedah
The Illustrious Order of Loyalty to the Royal House of Kedah is an honorific order of the Sultanate of Kedah.
The Illustrious Order of Loyalty to Sultan 'Abdu'l Halim Mu'azzam Shah is an honorific order of the Sultanate of Kedah
Al-Aminul Karim Sultan Sallehuddin ibni Almarhum Sultan Badlishah is the 29th Sultan of Kedah since ascending to the throne in September 2017 upon the death of his elder half-brother Abdul Halim.
Raja Iskandar Dzurkarnain ibni Almarhum Sultan Idris A’fifullah Shah is the Raja Di-Hilir of Perak and the second in the line of succession to the throne of the Malaysian state of Perak since 20 June 2014.
Sultanah Maliha binti Almarhum Tengku Ariff is the current Sultanah of Malaysian State of Kedah, replacing her sister-in-law, Sultanah Haminah. She was proclaimed as the Sultanah of Kedah on 30 April 2018 in a royal ceremony after her husband, Sultan Sallehuddin was made Sultan of Kedah. She is the mother to Tengku Sarafudin Badlishah and Tunku Shazuddin Ariff.
Brigadier General Dato’ Seri DiRaja Tan Sri Tunku Puteri Intan Safinaz Binti Almarhum Sultan Abdul Halim Mu’adzam Shah is the Tunku Temenggong of Kedah. She is the daughter of the 28th Sultan Kedah, Sultan Abdul Halim Mu’adzam Shah and Sultanah Bahiyah.
Sultan of Kedah 
