1915 state leaders - Events of 1916 - 1917 state leaders - State leaders by year

Africa

• Ethiopia -
  1. Iyasu V, Emperor of Ethiopia (1913-1916)
  2. Zauditu, Empress 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
  • Monarch (Empire of China) - Yuan Shikai, Emperor of China (1915-1916)
  • President (Republic of China) -
    1. Yuan Shikai, President of the Republic of China (1916)
    2. Li Yüan-hung, President of the Republic of China (1916-1917)
  • Premier (Republic of China) - Duan Qirui, Premier of the Republic of China (1916-1917)
• Japan
  • Monarch - Taishō, Emperor of Japan (1912-1926)
  • Prime Minister -
    1. Okuma Shigenobu, Prime Minister of Japan (1914-1916)
    2. 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 -

1. Esat Pashë Toptani, Chairman of the Provisional Government (1914-1916)
2. National government collapsed (1916-1918)

• Austria-Hungary
  • Monarch -
    1. Franz Joseph I, Emperor of Austria and King of Hungary (1848-1916)
    2. Karl I, Emperor of Austria and (as Charles IV) King of Hungary (1916-1918)
  • Minister-President of Austria
    • 1. Count Karl von Stürgkh (1911-1916)
      2. Ernst von Körber 1916
      3. Count Heinrich von Clam-Martinic 1916-1917
  • Minister-President of Hungary
    • Count István Tisza (1913-1917)
• 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)
• France -
  • President - Raymond Poincaré, President of France (1913-1920)
  • Prime Minister - Aristide Briand, President of the Council (1915-1917)
• German Empire -
  • Monarch - Wilhelm II, German Emperor (1888-1918)
  • Chancellor - Theobald von Bethmann Hollweg, Chancellor of Germany (1909-1917)
  • Prussia -
    • Monarch - Wilhelm II, King of Prussia (1888-1918)
    • Prime Minister - Theobald von Bethmann Hollweg, Minister-President of Prussia (1909-1917)
  • 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. Antonio Salandra, Prime Minister of Italy (1914-1916)
    2. Paolo Boselli, Prime Minister of Italy (1916-1917)
• Luxembourg
  • Monarch - Marie-Adélaïde, Grand Duchess of Luxembourg (1912-1919)
  • Prime Minister -
  1. Hubert Loutsch, Prime Minister of Luxembourg (1915-24 February 1916)
  2. Victor Thorn, Prime Minister of Luxembourg (24 February 1916-1917)
• 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 - Bernardino Machado, President of Portugal, (1915-1917)
  • Prime Minister -
    1. Afonso Costa, President of the Ministry (1915-1916)
    2. António José de Almeida, President of the Ministry (1916-1917)
• Romania - King Ferdinand (1914-1927)
• Spain
  • Monarch - Alfonso XIII, King of Spain (1886-1931)
  • Prime Minister - Álvaro Figueroa Torres, President of the Government (1915-1917)
• Sweden
  • Monarch - Gustaf V, King of Sweden (1907-1950)
  • Prime Minister - Hjalmar Hammarskjöld, Prime Minister of Sweden (1914-1917)
• United Kingdom -
  • Monarch - George V, King of the United Kingdom (1910-1936)
  • Prime Minister -
    1. Herbert Henry Asquith, Prime Minister of the United Kingdom (1908-1916)
    2. 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 -
    1. HRH the Duke of Connaught and Strathearn, Governor-General of Canada (1911-1916)
    2. Duke of Devonshire, Governor-General of Canada (1916-1921)
  • Prime Minister - Sir Robert Borden, Prime Minister of Canada (1911-1920)
• Costa Rica - Alfredo González Flores, President of Costa Rica (1914–1917)
• 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 - Walter Edward Davidson, Governor of Newfoundland (1913-1917)
  • 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 -
  1. Eduardo Schaerer, President of Paraguay (1912-1916)
  2. 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)