This is a list of state leaders aged 30 or younger when they assumed office (since 1900). It does not include leaders who did not assume power in their own right, or leaders who served under colonial rule.
Name | State | Position | Born | Assumed office | At age | Notes | |
---|---|---|---|---|---|---|---|
Fuad II | King | 1952 | 1952 | 6 months | |||
Puyi | Emperor | 1906 | 1908 | 2 | |||
Gyanendra | King | 1947 | 1950 | 3 | |||
Mwambutsa IV | King | 1912 | 1915 | 3 | |||
Tenzin Gyatso | Dalai Lama | 1935 | 1940 | 4 | |||
Michael I | Romania | King | 1921 | 1927 | 5 | ||
Simeon II | Tsar | 1937 | 1943 | 6 | |||
Duy Tân | Emperor | 1900 | 1907 | 7 | |||
Ananda Mahidol | Thailand | King | 1925 | 1935 | 9 | Assumed power following a 10-year regency. | |
Ahmad Shah Qajar | Shah | 1898 | 1909 | 11 | Assumed power following a 5-year regency. | ||
Hussein | Jordan | King | 1935 | 1952 | 16 | ||
Jigme Singye Wangchuck | Bhutan | King | 1955 | 1972 | 16 | ||
Alfonso XIII | Spain | King | 1886 | 1902 | 16 | Assumed power following a 16-year regency. | |
Tribhuvan | King | 1906 | 1923 | 17 | Assumed power following a regency since 1911. | ||
Farouk I | King | 1920 | 1937 | 17 | Assumed power following a 1-year regency. | ||
Marie-Adélaïde | Luxembourg | 1894 | 1912 | 17 | |||
Peter II | King | 1923 | 1941 | 17 | Assumed power following a 6-year regency. | ||
Iyasu V | Emperor | 1895 | 1913 | 18 | |||
Faisal II | King | 1935 | 1953 | 18 | Assumed power following a 14-year regency. | ||
Mswati III | 1968 | 1986 | 18 | Assumed power following a 3-year regency. | |||
Manuel II | Portugal | King | 1889 | 1908 | 18 | ||
Michael I | King | 1921 | 1940 | 18 | Was previously King from 1927 to 1930 under a regency. | ||
Bhumibol Adulyadej | King | 1927 | 1946 | 18 | |||
Ntare V | King | 1947 | 1966 | 18 | |||
Mohammad Zahir Shah | 1914 | 1933 | 19 | ||||
Norodom Sihanouk | Cambodia | 1922 | 1941 | 19 | |||
Baudouin | Belgium | 1930 | 1951 | 20 | Acted as regent for his father since 1950. | ||
Mohammad Reza Pahlavi | Shah | 1919 | 1941 | 21 | |||
Hassanal Bolkiah | Sultan | 1946 | 1967 | 21 | Reigning as Sultan since 1967. | ||
Charlotte | Grand Duchess | 1896 | 1919 | 22 | |||
Alexander | King | 1893 | 1917 | 23 | |||
Constantine II | King | 1940 | 1964 | 23 | |||
Boris III | Tsar | 1894 | 1918 | 24 | |||
Jigme Dorji Wangchuck | King | 1928 | 1952 | 24 | |||
Hirohito | Japan | Emperor | 1901 | 1926 | 25 | Acted as regent for his father since 1921. | |
Rainier III | Monaco | 1923 | 1949 | 25 | |||
Elizabeth II | United Kingdom | Queen | 1926 | 1952 | 25 | ||
Jigme Khesar Namgyel Wangchuck | King of Bhutan | King | 1980 | 2006 | 26 | ||
Amānullāh Khān | Afghanistan | Emir | 1892 | 1919 | 26 | ||
Moshoeshoe II | Lesotho | King | 1938 | 1965 | 26 | Ruled as Paramount Chief under colonial rule since 1960. | |
Birendra | King | 1945 | 1972 | 26 | |||
Carl XVI Gustaf | Sweden | 1946 | 1973 | 27 | |||
Letsie III | King | 1963 | 1990 | 27 | |||
Vajiravudh | King | 1881 | 1910 | 29 | |||
Karl I | Emperor | 1887 | 1916 | 29 | |||
Qaboos bin Said al Said | Oman | Sultan | 1940 | 1970 | 29 | ||
Dipendra | King | 1971 | 2001 | 29 | |||
Vittorio Emanuele III | 1869 | 1900 | 30 |