1916 state leaders - Events of 1917 - 1918 state leaders - State leaders by year

Africa

• Ethiopia - Zauditu, Emperor of Ethiopia (1916-1930)
• Liberia - Daniel E. Howard, President of Liberia (1912-1920)
• South Africa
  • Monarch - King George V, King of South Africa (1910-1936)
  • Governor-General - Viscount Buxton, Governor-General of South Africa (1914-1920)
  • Prime Minister - Louis Botha, Prime Minister of South Africa (1910-1919)
• Zanzibar - Sayyid Khalifa bin Harub Al-Busaid, Sultan of Zanzibar (1911-1960)

Asia

• Afghanistan - Habibullah Khan, King of Afghanistan (1901-1919)
• Brunei - Muhammad Jamalul Alam II, Sultan of Brunei (1906–1924)
• China
  • President -
    1. Li Yüan-hung, President of the Republic of China (1916-1917)
    2. Feng Kuo-Chang, President of the Republic of China (1917-1918)
  • Premier -
    1. Duan Qirui, Premier of the Republic of China (1916-1917)
    2. Wu Tingfang, Acting Premier of the Republic of China (1917)
    3. Li Jingxi, Premier of the Republic of China (1917)
    4. Xu Shichang, Premier of the Republic of China (1917)
    5. Jiang Zhaozong, Acting Premier of the Republic of China (1917)
    6. Li Jingxi, Premier of the Republic of China (1917)
    7. Duan Qirui, Premier of the Republic of China (1917)
    8. Weng Shizhen, Acting Premier of the Republic of China (1917-1918)
• Japan
  • Monarch - Taishō, Emperor of Japan (1912-1926)
  • Prime Minister - Terauchi Masatake, Prime Minister of Japan (1916-1918)
• Oman - Taimur Bin Faisal, Sultan of Oman (1913-1932)

Australia and Oceania

• Australia -
  • Monarch - George V, King of the United Kingdom (1910-1936)
  • Governor-General - Ronald Munro-Ferguson, Governor-General of Australia (1914-1920)
  • Prime Minister - Billy Hughes, Prime Minister of Australia (1915-1923)
• Tonga
  • Monarch - George Tupou II, King of Tonga (1893 – 1918)
  • Prime Minister - T.P.Tu'ivakano, Prime Minister of Tonga, (1912 – 1923)

Europe

• Albania - National government collapsed (1916-1918)
• Austria-Hungary
  • Monarch - Karl I, Emperor of Austria and (as Charles IV) King of Hungary (1916-1918)
  • Minister-President of Austria
    • 1. Count Heinrich von Clam-Martinic (1916-1917)
      2. Ernst Seidler von Feuchtenegg (1917-1918)
  • Minister-President of Hungary
    • Prime Minister -
      1. Count István Tisza (1913-1917)
      2. Count Móric Esterházy (1917)
      3. Count Sándor Wekerle (1917-1918)
• Belgium
  • Monarch - Albert I, King of the Belgians (1909-1934)
  • Cabinet Chief - Charles de Broqueville, Cabinet Chief (1911-1918)
• Denmark
  • Monarch - Christian X, King of Denmark (1912-1947)
  • Prime Minister - Carl Theodor Zahle, Prime Minister of Denmark (1913-1920)
• Finland - (newly independent)
  • Prime Minister - Pehr Evind Svinhufvud, Prime Minister of Finland (1917-1918)
• France -
  • President - Raymond Poincaré, President of France (1913-1920)
  • Prime Minister -
    1. Aristide Briand, President of the Council (1915-1917)
    2. Alexandre Ribot, President of the Council (1917)
    3. Paul Painlevé, President of the Council (1917)
    4. Georges Clemenceau, President of the Council (1917-1920)
• German Empire -
  • Monarch - Wilhelm II, German Emperor (1888-1918)
  • Chancellor -
    1. Theobald von Bethmann Hollweg, Chancellor of Germany (1909-1917)
    2. Georg Michaelis, Chancellor of Germany (1917)
    3. Count Georg von Hertling, Chancellor of Germany (1917-1918)
  • Prussia -
    • Monarch - Wilhelm II, King of Prussia (1888-1918)
    • Prime Minister - German Chancellor also served as Minister-President of Prussia
  • Bavaria - Ludwig III, King of Bavaria (1913-1918)
  • Saxony - Frederick Augustus III, King of Saxony (1904-1918)
  • Württemberg - William II, King of Württemberg (1891-1918)
• Italy
  • Monarch - Vittorio Emanuele III, King of Italy (1900-1946)
  • Prime Minister -
    1. Paolo Boselli, Prime Minister of Italy (1916-1917)
    2. Vittorio Orlando, Prime Minister of Italy (1917-1919)
• Luxembourg
  • Monarch - Marie-Adélaïde, Grand Duchess of Luxembourg (1912-1919)
  • Prime Minister -
  1. Victor Thorn, Prime Minister of Luxembourg (1916-19 June 1917)
  2. Léon Kauffmann, Prime Minister of Luxembourg (19 June 1917-1918)
• Netherlands -
  • Monarch - Wilhelmina, Queen of the Netherlands (1890-1948)
  • Prime Minister - Pieter Cort van der Linden, Chairman of the Dutch council of ministers (1913-1918)
• Norway
  • Monarch - Haakon VII, King of Norway (1905-1957)
  • Prime Minister - Gunnar Knudsen, Prime Minister of Norway (1913-1920)
• Ottoman Empire
  • Monarch - Mehmed V, Sultan (1909-1918)
• Portugal
  • President -
    1. Bernardino Machado, President of Portugal, (1915-1917)
    2. Sidónio Pais, President of the Revolutionary Junta, (1917-1918 - from 1918 as President of Portugal)
  • Prime Minister -
    1. António José de Almeida, President of the Ministry (1916-1917)
    2. Afonso Costa, President of the Ministry (1917)
    3. Sidónio Pais, President of the Ministry (1917-1918)
• Romania - King Ferdinand (1914-1927)
• Spain
  • Monarch - Alfonso XIII, King of Spain (1886-1931)
  • Prime Minister -
  1. Álvaro Figueroa Torres, President of the Government (December 9, 1915 - April 19, 1917)
  2. Manuel García Prieto, President of the Government (April 19, 1917 - June 11, 1917)
  3. Eduardo Dato Iradier, President of the Government (June 11, 1917 - November 3, 1917)
  4. Manuel García Prieto, President of the Government (November 3, 1917 - March 22, 1918)
• Sweden
  • Monarch - Gustaf V, King of Sweden (1907-1950)
  • Prime Minister -
  1. Hjalmar Hammarskjöld, Prime Minister of Sweden (1914-1917)
  2. Carl Swartz, Prime Minister of Sweden (1917)
  3. Nils Edén, Prime Minister of Sweden (1917-1920)
• United Kingdom -
  • Monarch - George V, King of the United Kingdom (1910-1936)
  • Prime Minister - David Lloyd George, Prime Minister of the United Kingdom (1916-1922)

North America and the Caribbean

• Canada
  • Monarch - King George V, King of Canada (1910-1936)
  • Governor-General - Duke of Devonshire, Governor-General of Canada (1916-1921)
  • Prime Minister - Sir Robert Borden, Prime Minister of Canada (1911-1920)
• Costa Rica -
  1. Alfredo González Flores, President of Costa Rica (1914–1917)
  2. Federico Tinoco Granados, President of Costa Rica (1917–1919)
• Cuba - Mario García Menocal, President of Cuba (1913-1921)
• México - Venustiano Carranza, President of Mexico (1914-1920)
• Newfoundland
  • Monarch - King George V, King of Newfoundland {1910-1936}
  • Governor -
    1. Walter Edward Davidson, Governor of Newfoundland (1913-1917)
    2. Charles A. Harris, Governor of Newfoundland (1917-1922)
  • Prime Minister - Edward Patrick Morris, Prime Minister of Newfoundland (1909-1917)
• United States - Woodrow Wilson, President of the United States (1913-1921)

South America

• Brazil - Venceslau Brás Pereira Gomes, President of Brazil (1914-1918)
• Paraguay - Manuel Franco, President of Paraguay (1916-1919)
• Peru - José Pardo y Barreda, President of Peru (1915-1919)
• Uruguay - Feliciano Viera, President of Uruguay (1915-1919)
• Venezuela - Victorino Márquez Bustillos, provisional President of Venezuela (1915-1922)