Monarch	Country	Years in Power
1. King Bhumibol	Thailand	61
2. Emir Saqr bin Mohammad al-Qassimi	United Arab Emirites	58
3. Queen Elizabeth II	United Kingdom	55
4. Isebantu Kyabazinga Henry Wako Muloki	Uganda	51
5. Sultan Tuanku Abdul Halim Muadzam Shah	Malaysia	48
6. Yang di-Pertuan Besar Tuanku Jaafar ibni Almarhum Tuanku Abdul Rahman	Malaysia	40
7. Sultan Hassanal Bolkiah	Brunei	39
8. King Goodwill Zwelethini kaBhekuzulu	South Africa	38
9. Sultan Qaboos Bin Said	Oman	36
10. Queen Margrethe II	Denmark	35