The following is a list of heads of state as of 1917.
List of Heads of State in 1916 - 1917 - List of Heads of State in 1918 - List of Heads of State by year
See also:
- List of Religious Leaders in 1917
- List of Colonial Governors in 1917
Australia and Oceania
- Tonga - George Tupow II , King ( 1893 - 1918 )
Asia
Afghanistan - Habibula Khan , Emir ( 1901 - 1919 )
Bahrain - Isa Ibn Ali , Sheikh ( 1869 - 1932 )
Brunei - Muhammad Jamal al-Alam II , Sultan ( 1906 - 1924 )
Jebel Shammar - Saud ibn Abd al-Aziz , Emir ( 1909 - 1920 )
Iran - Sultan Ahmad Shah , Shahinshah ( 1909 - 1925 )
Mongolia - Bogdo-Gegan VIII , Bogdo-Khan ( 1911 - 1924 )
Nepal - Tribhuvan Vir Vikram Shah , King ( 1911 - 1955 )
Ottoman Empire - Mehmed V , Sultan ( 1909 - 1918 )
Riyadh - Abd al-Aziz II , emir ( 1902 - 1953 )
Siam - Rama VI Maha Vichirovut , Khun ( 1910 - 1925 )
Tibet -- Thupten Gyatso , Dalai Lama ( 1876 - 1933 )
- The Panchen Lama IX Choizhi Nyima , the Panchen Lama ( 1883 - 1937 )
Japan - Yoshihito , Mikado ( 1912 - 1926 )
Africa
Ethiopia - Zaudita , Empress ( 1916 - 1930 )
Ankole - Kahaya II , Mugabe ( 1895 - 1944 )
- Ahaggar - Musa ag Amastan , amenokali ( 1905 - 1920 )
Buganda - Kwa II (Daudi Chwa), king ( 1897 - 1939 )
Bunioro - Duhaga II Bisereko , omukama ( 1902 - 1924 )
Zanzibar - Khalifa ibn Harub ibn Tuvaini , Sultan ( 1911 - 1960 )
Liberia - Daniel Edward Howard , President ( 1912 - 1920 )
- Rwanda - Yuhi III Musinga , King ( 1896 - 1931 )
Europe
- Austria-Hungary - Charles I , Emperor of Austria , King of Hungary , etc. ( 1916 - 1918 )
- Albania - Ayudullah Rushdi , Prime Minister ( 1914 - 1918 )
- Belgium - Albert I , King ( 1909 - 1934 )
- Bulgaria - Ferdinand I , king ( 1886 - 1918 )
- Great Britain -
- George V , king ( 1910 - 1936 )
- David Lloyd George , Prime Minister ( 1916 - 1922 )
- Australia - William Morris Hughes , Prime Minister ( 1915 - 1923 )
- Canada - Robert Laird Borden , Prime Minister ( 1911 - 1920 )
- New Zealand - William Massey , Prime Minister ( 1912 - 1925 )
- Newfoundland - Edward Morris , Prime Minister ( 1909 - 1917 )
- South Africa - Louis Botha , Prime Minister ( 1910 - 1919 )
- Germany - William II , Kaiser ( 1888 - 1918 )
- Greece -
- Constantine I , king ( 1913 - 1917 )
- Alexander I , king ( 1917 - 1920 )
- Denmark - Christian X , King ( 1912 - 1947 )
- Spain - Alphonse XIII , King ( 1886 - 1931 )
- Italy - Victor Emmanuel III , King ( 1900 - 1946 )
- Liechtenstein - Johann II , Prince ( 1858 - 1929 )
- Luxembourg - Maria Adelaide , Grand Duchess ( 1912 - 1919 )
- Monaco - Albert I , Prince ( 1889 - 1922 )
- Netherlands - Wilhelmina , Queen ( 1890 - 1948 )
- Norway - Haakon VII , King ( 1905 - 1957 )
- Poland - Regent Council:
- Alexander Kakovsky , Regent ( 1917 - 1918 )
- Zdislav Lubomirsky , Regent ( 1917 - 1918 )
- Jozef Ostrowski , Regent ( 1917 - 1918 )
- Portugal -
- Bernardine Mashad , President ( 1915 - 1917 )
- Sidonia Pais , President ( 1917 - 1918 )
- Russian Empire -
- Nicholas II , Emperor ( 1894 - 1917 )
- Bukhara - Seyyid Alim Khan , emir ( 1910 - 1920 )
- Khiva - Isfandiyar Khan , Khan ( 1910 - 1918 )
- Russian republic -
- Georgy Evgenievich Lvov , Chairman of the Council of Ministers ( 1917 )
- Alexander Fedorovich Kerensky , Chairman of the Council of Ministers ( 1917 )
- Ukraine - Mikhail Sergeevich Grushevsky , Chairman of the Central Council ( 1917 - 1918 )
- Soviet Russia - Vladimir Ilyich Lenin , chairman of the Council of People's Commissars of the RSFSR ( 1917 - 1922 )
- Romania - Ferdinand I , King ( 1914 - 1927 )
- Holy See - Benedict XV , Pope ( 1914 - 1922 )
- Serbia - Peter I Karageorgievich , king ( 1903 - 1918 )
- Finland - Per Ewind Swinhuvud , Prime Minister ( 1917 - 1918 )
- France -
- Raymond Poincare , President ( 1913 - 1920 )
- Cambodia - Sisovat I , King ( 1904 - 1928 )
- Laos :
- Luang Prabang - Sisawang Wong , King ( 1904 - 1946 )
- Tyampasak - Ratsadanay , King ( 1900 - 1945 )
- Morocco - Moulay Yusuf , Sulian (1912-1927)
- Tunisia - Muhammad al-Nasir ibn Muhammad Bey ( 1906 - 1922 )
- Montenegro - Nikola I Petrovich , king ( 1910 - 1918 )
- Sweden - Gustav V , King ( 1907 - 1950 )