Too long in Power

 Queen Elizabeth II

UK: 59 years

   King Bhumibol Adulyadej

Thailand: 64 years

    Sultan Abdul Halim of Kedah

Malaysia: 1952

       Hassanal Bolkiah

    Brunei: 1943

Qaboos Bin Said

Oman: 40 years

 Muammar Gaddafi

Libiya - 40 years

     Queen Margrethe II

Denmark: 39 years

King Carl XVI Gustaf

Sweden: 37 years

King Juan Carlos I
Spain: 35 years

President Ali Abdullah Saleh
Yemen: 31 years

José Eduardo
Angola: 1931

 Robert Mugabe
Zimbabwe: 30 years

Prince Khalifa bin Salman Al Khalifa

Bahrain: 30 years