List of current reigning monarchs by length of reign

Hassanal Bolkiah, the longest-reigning existing monarch

This is a list of reigning monarchs sorted by length of service.

This list includes monarchs who do not reign over entire nations, such as Muhammad V of Kelantan, but does not include former monarchs and pretenders, such as Simeon II of Bulgaria, ex officio monarchs such as Emmanuel Macron who in his capacity as President of France is also Co-Prince of Andorra, monarchs without physical territories such as the Prince and Grand Master of the Sovereign Military Order of Malta, constituent monarchs such as the traditional African rulers, or monarchs whose position is unofficial, such as Tenzin Gyatso, 14th Dalai Lama.

Hassanal Bolkiah is the longest-reigning existing monarch, having been Sultan of Brunei since 5 October 1967. ^[1] He became the longest-reigning monarch upon the death of Elizabeth II of the United Kingdom on 8 September 2022. ^[2]

List

Rank	Monarch	State	Country	Born	Current age	Acceded	Years reigned
Reigns as of 15 September 2025 T 22:54 (UTC)
1	Hassanal Bolkiah	Brunei		15 July 1946	79 years, 62 days	5 October 1967	57 years, 345 days
2	Sultan bin Mohamed Al-Qassimi III	Sharjah	United Arab Emirates	6 July 1939	86 years, 71 days	25 January 1972	53 years, 233 days
3	Carl XVI Gustaf	Sweden		30 April 1946	79 years, 138 days	15 September 1973	52 years, 0 days
4	Hamad bin Mohammed Al Sharqi	Fujairah	United Arab Emirates	22 February 1949	76 years, 205 days	18 September 1974	50 years, 362 days
5	Humaid bin Rashid Al Nuaimi III	Ajman		1 January 1931	94 years, 257 days	6 September 1981	44 years, 9 days
6	Mswati III	Eswatini [a]	19 April 1968	57 years, 149 days	25 April 1986	39 years, 143 days
	Ntfombi		27 December 1949	75 years, 262 days
7	Hans-Adam II	Liechtenstein		14 February 1945	80 years, 213 days	13 November 1989	35 years, 306 days
8	Harald V	Norway		21 February 1937	88 years, 206 days	17 January 1991	34 years, 241 days
9	Letsie III	Lesotho		17 July 1963	62 years, 60 days	7 February 1996 [b]	33 years, 291 days [b]
10	Mizan Zainal Abidin	Terengganu	Malaysia	22 January 1962	63 years, 236 days	15 May 1998	27 years, 123 days
11	Abdullah II	Jordan		30 January 1962	63 years, 228 days	7 February 1999	26 years, 220 days
12	Hamad bin Isa Al Khalifa	Bahrain		28 January 1950	75 years, 230 days	6 March 1999	26 years, 193 days
13	Mohammed VI	Morocco		21 August 1963	62 years, 25 days	23 July 1999	26 years, 54 days
14	Syed Sirajuddin	Perlis	Malaysia	17 May 1943	82 years, 121 days	17 April 2000	25 years, 151 days
15	Henri	Luxembourg		16 April 1955	70 years, 152 days	7 October 2000	24 years, 343 days
16	Sharafuddin Idris Shah	Selangor	Malaysia	11 December 1945	79 years, 278 days	22 November 2001	23 years, 297 days
17	Norodom Sihamoni	Cambodia		14 May 1953	72 years, 124 days	14 October 2004	20 years, 336 days
18	Albert II	Monaco		14 March 1958	67 years, 185 days	6 April 2005	20 years, 162 days
19	Mohammed bin Rashid Al Maktoum	Dubai	United Arab Emirates	15 July 1949	76 years, 62 days	4 January 2006	19 years, 254 days
20	Jigme Khesar Namgyel Wangchuck	Bhutan		21 February 1980	45 years, 206 days	9 December 2006	18 years, 280 days
21	Muhriz	Negeri Sembilan	Malaysia	14 January 1948	77 years, 244 days	29 December 2008	16 years, 260 days
22	Saud bin Rashid Al Mualla	Umm al-Quwain	United Arab Emirates	1 October 1952	72 years, 349 days	2 January 2009	16 years, 256 days
23	Ibrahim Iskandar	Johor	Malaysia [c]	22 November 1958	66 years, 297 days	23 January 2010	15 years, 235 days
24	Muhammad V	Kelantan	Malaysia	6 October 1969	55 years, 344 days	13 September 2010	15 years, 2 days
25	Saud bin Saqr Al Qasimi	Ras al-Khaimah	United Arab Emirates	10 February 1956	69 years, 217 days	27 October 2010	14 years, 323 days
26	Tupou VI	Tonga		12 July 1959	66 years, 65 days	18 March 2012	13 years, 181 days
27	Willem-Alexander	Netherlands		27 April 1967	58 years, 141 days	30 April 2013	12 years, 138 days
28	Tamim bin Hamad Al Thani	Qatar		3 June 1980	45 years, 104 days	25 June 2013	12 years, 82 days
29	Philippe	Belgium		15 April 1960	65 years, 153 days	21 July 2013	12 years, 56 days
30	Nazrin Muizzuddin Shah	Perak	Malaysia	27 November 1956	68 years, 292 days	29 May 2014	11 years, 109 days
31	Felipe VI	Spain		30 January 1968	57 years, 228 days	19 June 2014	11 years, 88 days
32	Salman bin Abdulaziz Al Saud	Saudi Arabia		31 December 1935	89 years, 258 days	23 January 2015	10 years, 235 days
33	Vajiralongkorn (Rama X)	Thailand		28 July 1952	73 years, 49 days	13 October 2016	8 years, 337 days
34	Mahmud Sallehuddin	Kedah	Malaysia	30 April 1942	83 years, 138 days	11 September 2017	8 years, 4 days
35	Abdullah Sultan Ahmad Shah	Pahang		30 July 1959	66 years, 47 days	15 January 2019	6 years, 243 days
36	Naruhito	Japan		23 February 1960	65 years, 204 days	1 May 2019	6 years, 137 days
37	Haitham bin Tariq Al Said	Oman		11 October 1954	70 years, 339 days	11 January 2020	5 years, 247 days
38	Mohamed bin Zayed Al Nahyan	Abu Dhabi	United Arab Emirates	11 March 1961	64 years, 188 days	13 May 2022	3 years, 125 days
39	Charles III	Antigua and Barbuda		14 November 1948	76 years, 305 days	8 September 2022	3 years, 7 days
		Australia
		The Bahamas
		Belize
		Canada
		Grenada
		Jamaica
		New Zealand
		Papua New Guinea
		Saint Kitts and Nevis
		Saint Lucia
		Saint Vincent and the Grenadines
		Solomon Islands
		Tuvalu
		United Kingdom
40	Mishal Al-Ahmad Al-Jaber Al-Sabah	Kuwait		27 September 1940	84 years, 353 days	16 December 2023	1 year, 273 days
41	Frederik X	Denmark		26 May 1968	57 years, 112 days	14 January 2024	1 year, 244 days
42	Leo XIV	Vatican City		14 September 1955	70 years, 1 day	8 May 2025	130 days

See also

• List of current monarchs of sovereign states
• List of current heads of state and government
• List of current state leaders by date of assumption of office
• List of longest-reigning monarchs
• List of shortest-reigning monarchs
• Lists of state leaders by age

Notes

1. The Monarchy of Eswatini is a diarchy jointly headed by the King and the Queen Mother.
2. Letsie III first reigned during 12 November 1990 –25 January 1995, was deposed, then returned to the throne on 7 February 1996. Length-of-reign calculation includes both tenures.
3. Ibrahim Iskandar is also the currently-reigning Yang di-Pertuan Agong, and has reigned for 1 year, 227 days (since 31 January 2024).

References

1. "Sultan of Brunei becomes world's longest-serving monarch after Elizabeth II's passing". Arab News. 2022-09-09. Retrieved 2022-09-25.
2. "Queen Elizabeth II has died". BBC News. 2022-09-08. Retrieved 2022-09-25.