A regent is a person selected to act as head of state (ruling or not) because the ruler is a minor, not present, or debilitated. Currently there is only one ruling Regency in the world, sovereign Liechtenstein. The following is a list of regents.

Regents in extant monarchies

Those who held a regency briefly, for example during surgery, are not necessarily listed, particularly if they performed no official acts; this list is also not complete, presumably not even for all monarchies included. The list includes some figures who acted as regent, even if they did not themselves hold the title of regent.

List of regents

Asia

Cambodia

Prince Sisowath Monireth, Chairman of the Regency Council of Cambodia in 1960

Chea Sim, Acting Head of State of Cambodia from 1993 to 1994, and again from 1994 to 1995, and twice in 2004 Nhek Bun Chhay, Acting Head of State of Cambodia in 2004

List of regents

Japan

Regent Empress Dowager Jingū for her son, the future Emperor Ōjin

Prince Regent Shōtoku for his aunt, Empress Suiko

Fujiwara Regents as Sesshō or Kampaku

Prince Regent Hirohito for his father, Emperor Taishō, from 1921 to 1926.

List of regents

Jordan

Prince Naif bin Al-Abdullah from 20 July to 5 September 1951, due to the schizophrenia of his brother King Talal, who was in a Swiss mental hospital. A regency council (Ibrahim Hashem, Suleiman Toukan, Abdul Rahman Rusheidat and chairing Queen Mother Zein al-Sharaf Talal) took over during the king's ailment and continued after the king's forced abdication (on 11 August 1952), serving from 4 June 1952 to 2 May 1953, until King Hussein came of age. Crown Prince Hassan, from 4 July 1998 to 19 January 1999 while his brother King Hussein was undergoing cancer treatments.

Malaysia and its constitutive monarchies

Terengganu

Tengku Muhammad Ismail (eight-years of age at the time), co-reigned with the three-member Regency Advisory Council (Majlis Penasihat Pemangku Raja) from 2006 to 2011. His father, Sultan Mizan Zainal Abidin the Sultan of Terengganu was elected as 13th King of Malaysia. The Malaysian constitution does not allow a simultaneous reign as both the King of Malaysia and as monarch of the King's native state (deemed absent on the State throne). Sultan Mizan was crowned as King on 13 December 2006 and the prince as the Regent (Pemangku Raja) of Terengganu effective on the same date.

Oman

for the minor Sa`id (II) ibn Sultan (b. 1790 – succeeded 20 November 1804 – d. 19 Oct 1856) : 20 November 1804 – 31 July 1806 Badr ibn Sayf (d. 1806) for Sultan Turki ibn Sa`id (b. 1832 – succeeded 30 January 1871 – died 4 Jun 1888) : August – December 1875 Abdul-Aziz ibn Said – (b. 1850 – d. 1907)

Qatar

H.E. Shaikh Abdullah bin Jassim Al Thani was proclaimed as regent when his father Sheikh Qasim bin Muhammad Al Thani became incapacitated, 13 May 1913; succeeded on his death, 17 July 1913

Saudi Arabia

30 March 1964 – 2 November 1964 Crown Prince Faisal (b. 1906 – d. 1975) –Regent for his brother King Saud, and later his successor 1 January 1996 – 21 February 1996 formally, but de facto until 1 August 2005 Crown Prince Abdullah (b. 1924 – d. 2015) –Regent for his brother King Fahd, and later his successor

Thailand

Prayurawongse for King Mongkut (1851–1855) Sri Suriwongse for King Chulalongkorn (1868–1873) Queen Saovabha Phongsri for King Chulalongkorn (1897) Crown Prince Maha Vajiravudh for King Chulalongkorn (1907) Prince Prajadhipok Sakdidej for King Vajiravudh (1925) Prince Paribatra Sukhumbandhu for King Prajadhipok (1932) Prince Narisara Nuwattiwong for King Prajadhipok (1934–1935) Prince Oscar Anuvatana (d. 1935), Prince Aditya Dibabha (1935–1944), Pan Sukhum (1935–1938), General Um Indrayodhin (1935–1942) and Pridi Banomyong (1941–1945) for King Ananda Mahidol Prem Tinsulanonda, regent from 13 October to 1 December 2016 while King Vajiralongkorn was in mourning for his father and predecessor.

Africa

Morocco

The Wattasid Vizier Abu Zakariya Yahya was regent during the minority of the Marinid sultan Abd al-Haqq II; the Wattasid Viziers however kept the power beyond the majority of Abd al-Haqq II, until 1459 when most members of their family were killed by the sultan, allowing him to return to power.

Lesotho

Queen Mamohato was regent for the exiled King Moshoeshoe II in 1970 and again in 1990, and after his death in 1996.