World’s longest reigning monarchs

On September 9, Queen Elizabeth II will become the longest-reigning monarch in British history. She is the second longest current reigning monarch, behind only King Bhumibol of Thailand
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1. King Bhumibol Adulyadej, Thailand Born 1927 Enthroned Jun 9, 1946 Reign (years) 69

2. Queen Elizabeth II, UK, Canada, Australia, N. Zealand, others b1926 Feb 6, 1952 63

3. Sultan Hassanal Bolkiah, Brunei b1946 Oct 5, 1967 47

4. Sultan Qaboos bin Said al Said, Oman b1940 Jul 23, 1970 45

5. Queen Margrethe II, Denmark b1940 Jan 14, 1972 43

6. King Carl XVI Gustaf, Sweden b1946 Sep 15, 1973 41

7. King Mswati III, Swaziland b1933 Apr 25, 1986 29

8. Emperor Akihito, Japan b1938 Jan 7, 1989 26 

9. King Letsie III, Lesotho b1933 Nov 12, 1990 24

10. King Harald V, Norway b1933 Jan 17, 1991 24
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List restricted to heads of state

Pictures: AP, Getty Images 
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