King Bhumibol Adulyadej of Thailand: 64 years
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Queen Elizabeth II of the United Kingdom: 59 years
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Sultan Abdul Halim of Kedah (Malaysia): 52 years
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Hassanal Bolkiah of Brunei: 43 years
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Qaboos Bin Said of Oman: 40 years
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Muammar Gaddafi of Libya: 40 years
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Queen Margrethe II of Denmark: 39 years
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King Carl XVI Gustaf 0f Sweden: 37 years
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King Juan Carlos I of Spain: 35 years
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President Ali Abdullah Saleh of Yemen: 31 years
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José Eduardo dos Santos of Angola: 31 years
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Robert Mugabe of Zimbabwe: 30 years
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Prince Khalifa bin Salman Al Khalifa of Bahrain: 30 years
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