Rank Name Nation(s) Born Ascended Years reigned
1. Bhumibol Adulyadej Thailand 5 December 1927 9 June 1946 68 years, 3 days
2. Elizabeth II Commonwealth realms[1] 21 April 1926 6 February 1952 62 years, 126 days
3. Abdul Halim Kedah (Malaysia)[2] 28 November 1927 14 July 1958 55 years, 333 days
4. Sikiru Kayode Adetona Ijebuland (Nigeria) 10 May 1934 4 January 1960 54 years, 159 days
5. Hassanal Bolkiah Brunei 15 July 1946 5 October 1967 46 years, 250 days
6. Goodwill Zwelithini kaBhekuzulu Zulu people (South Africa) 14 July 1948 17 September 1968 45 years, 268 days
7. Qaboos bin Said al Said Oman 18 November 1940 23 July 1970 43 years, 324 days
8. Margrethe II Denmark 16 April 1940 14 January 1972 42 years, 149 days
9. Sultan bin Mohamed Al-Qassimi III Sharjah (United Arab Emirates) 2 July 1939 25 January 1972 42 years, 138 days
10. Carl XVI Gustaf Sweden 30 April 1946 15 September 1973 40 years, 270 days
11. Ahmad Shah Pahang (Malaysia) 24 October 1930 7 May 1974 40 years, 36 days
12. Hamad bin Mohammed Al Sharqi Fujairah (United Arab Emirates) 25 August 1948 18 September 1974 39 years, 267 days
13. Juan Carlos I Spain 5 January 1938 22 November 1975 38 years, 202 days
14. Humaid bin Rashid Al Nuaimi Ajman (United Arab Emirates) 1931 6 September 1981 32 years, 279 days
15. Azlan Muhibbuddin Shah Perak (Malaysia) 19 April 1928 3 February 1984 30 years, 129 days
16. Mswati III Swaziland 19 April 1968 25 April 1986 28 years, 48 days
17. Akihito Japan 23 December 1933 7 January 1989 25 years, 156 days
18. Hamengkubuwana X Yogyakarta (Indonesia) 2 April 1946 7 March 1989 25 years, 97 days
19. Hans-Adam II Liechtenstein 14 February 1945 13 November 1989 24 years, 211 days
20. Letsie III Lesotho 17 July 1963 12 November 1990 23 years, 212 days
21. Harald V Norway 21 February 1937 17 January 1991 23 years, 146 days
22. Muwenda Mutebi II Buganda (Uganda) 13 April 1955 24 July 1993 20 years, 323 days
23. Oyo Nyimba Kabamba Iguru Rukidi IV Toro (Uganda) 16 April 1992 13 September 1995 18 years, 272 days
24. Mizan Zainal Abidin Terengganu (Malaysia) 22 January 1962 15 May 1998 16 years, 28 days
25. Abdullah II Jordan 30 January 1962 7 February 1999 15 years, 125 days
26. Hamad bin Isa Al Khalifa Bahrain 28 January 1950 6 March 1999 15 years, 98 days
27. Otumfuo Nana Osei Tutu II Ashanti people (Ghana) 6 May 1950 26 April 1999 15 years, 47 days
28. Paku Alam IX Pakualaman (Indonesia) 7 May 1938 26 May 1999 15 years, 17 days
29. Mohammed VI Morocco 21 August 1963 23 July 1999 14 years, 324 days
30. Tuanku Syed Sirajuddin Perlis (Malaysia) 16 May 1943 17 April 2000 14 years, 56 days
31. Henri Luxembourg 16 April 1955 7 October 2000 13 years, 248 days
32. Sharafuddin Idris Shah Selangor (Malaysia) 24 October 1945 21 November 2001 12 years, 203 days
33. Norodom Sihamoni Cambodia 14 May 1953 14 October 2004 9 years, 241 days
34. Khalifa bin Zayed Al Nahyan Abu Dhabi (United Arab Emirates) 25 January 1945 3 November 2004 9 years, 221 days
35. Albert II Monaco 14 March 1958 6 April 2005 9 years, 67 days
36. Abdullah Saudi Arabia 1 August 1924 1 August 2005 8 years, 315 days
37. Mohammed bin Rashid Al Maktoum Dubai (United Arab Emirates) 22 July 1949 4 January 2006 8 years, 159 days
38. Sabah Al-Ahmad Al-Jaber Al-Sabah Kuwait 16 June 1929 29 January 2006 8 years, 134 days
39. Tuheitia Paki Māori King (New Zealand) 21 April 1955 21 August 2006 7 years, 295 days
40. Jigme Khesar Namgyel Wangchuck Bhutan 21 February 1980 15 December 2006 7 years, 179 days
41. Kapiliele Faupala Wallis Island (Uvea) (Wallis and Futuna) 1940 25 June 2008 5 years, 352 days
42. Tunku Muhriz Negeri Sembilan (Malaysia) 14 January 1948 29 December 2008 5 years, 165 days
43. Saud bin Rashid Al Mu'alla Umm al-Quwain (United Arab Emirates) 1 October 1952 2 January 2009 5 years, 161 days
44. Charles Mumbere Rwenzururu (Uganda) 1953 19 October 2009 4 years, 236 days
45. Ibrahim Ismail Johor (Malaysia) 22 November 1958 22 January 2010 4 years, 141 days
46. Polikalepo Kolivai Sigave (Wallis and Futuna) 1939 7 July 2010 3 years, 340 days
47. Muhammad V Kelantan (Malaysia) 6 October 1969 13 September 2010 3 years, 272 days
48. Saud bin Saqr al Qasimi Ras al-Khaimah (United Arab Emirates) 10 February 1956 27 October 2010 3 years, 228 days
49. Tupou VI Tonga 12 July 1959 18 March 2012 2 years, 86 days
50. Francis Vatican City 17 December 1936 13 March 2013 1 year, 91 days
51. Willem-Alexander Netherlands 27 April 1967 30 April 2013 1 year, 43 days
52. Tamim bin Hamad Al Thani Qatar 3 June 1980 25 June 2013 0 years, 352 days
53. Philippe Belgium 15 April 1960 21 July 2013 0 years, 326 days