1919 state leaders - Events of 1920 - 1921 state leaders - State leaders by year

Africa

• Ethiopia - Zawditu, Empress of Ethiopia (1916-1930)
• Liberia
  • President -
    1. Daniel E. Howard, President of Liberia (1912-1920)
    2. Charles D.B. King, President of Liberia (1920-1930)
• South Africa
  • Monarch - King George V, King of South Africa (1910-1936)
  • Governor-General -
    1. Viscount Buxton, Governor-General of South Africa (1914-1920)
    2. Prince Arthur of Connaught, Governor-General of South Africa, (1920-1924)
  • Prime Minister - Jan Smuts, Prime Minister of South Africa 1919-1924)
• Zanzibar - Sayyid Khalifa bin Harub Al-Busaid, Sultan of Zanzibar (1911-1960)

Asia

• Afghanistan - Amanullah Khan, King of Afghanistan (1919-1926)
• Brunei - Muhammad Jamalul Alam II, Sultan of Brunei (1906–1924)
• China
  • President - Hsu Shih-Chang, President of the Republic of China (1918-1922)
  • Premier -
    1. Jin Yunpeng, Premier of the Republic of China (1919-1920)
    2. Sa Zhenbing, Acting Premier of the Republic of China (1920)
    3. Jin Yunpeng, Premier of the Republic of China (1920-1921)
• Japan
  • Monarch - Taishō, Emperor of Japan (1912-1926)
  • Prime Minister - Hara Takashi, Prime Minister of Japan (1918-1921)
• Oman - Taimur Bin Faisal, Sultan of Oman (1913-1932)

Australia and Oceania

• Australia -
  • Monarch - George V, King of Australia (1910-1936)
  • Governor-General -
    1. Ronald Munro-Ferguson, Governor-General of Australia (1914-1920)
    2. Henry Forster, 1st Baron Forster of Lepe, Governor-General of Australia (1920-1925)
  • Prime Minister - Billy Hughes, Prime Minister of Australia (1915-1923)
• Tonga
  • Monarch - Salote Tupou III, Queen of Tonga (1918 – 1965)
  • Prime Minister - T.P.Tu'ivakano, Prime Minister of Tonga, (1912 – 1923)

Europe

• Austria -
  • President -
    1. Karl Seitz, President of Austria (1919-1920)
    2. Michael Hainisch, President of Austria (1920-1928)
  • Chancellor -
    1. Karl Renner, Chancellor of Austria (1918-1920)
    2. Michael Mayr, Chancellor of Austria (1920-1921)
• Belgium -
  • Monarch - Albert I, King of the Belgians (1909-1934)
  • Prime Minister -
    1. Léon Delacroix, Prime Minister of Belgium (1918-1920)
    2. Henri, Comte Carton de Wiart, Prime Minister of Belgium (1920-1921)
• Denmark
  • Monarch - Christian X, King of Denmark (1912-1947)
  • Prime Minister -
    1. Carl Theodor Zahle, Prime Minister of Denmark (1913-1920)
    2. Carl Julius Otto Liebe, Prime Minister of Denmark (30 March-5 April 1920)
    3. Michael Petersen Friis, Prime Minister of Denmark (5 April-5 May 1920)
    4. Niels Thomasius Neergaard, Prime Minister of Denmark (1920-1924)
• Estonia -
  • Prime Minister -
    1. Jaan Tõnisson, Prime Minister of Estonia (1919 November 18 - 1920 July 28)
    2. Ado Birk, Prime Minister of Estonia (1920 July 28 - July 30)
    3. Jaan Tõnisson, acting Prime Minister of Estonia (1920 July 29 - July 30)
    4. Jaan Tõnisson, Prime Minister of Estonia (1920 July 30 - October 26)
    5. Ants Piip, Prime Minister of Estonia (1920 October 26 - December 21)
  • State Elder -
    1. Ants Piip, acting State Elder of Estonia (1920 December 21 - 1921 January 25)
• Finland -
  • President - Kaarlo Juho Ståhlberg, President of Finland (1919-1925)
  • Prime Minister -
    1. Juho Vennola, Prime Minister of Finland (1919-1920)
    2. Rafael Erich, Prime Minister of Finland (1920-1921)
• France -
  • President -
    1. Raymond Poincaré, President of France (1913-1920)
    2. Paul Deschanel, President of France (1920)
    3. Alexandre Millerand, President of France (1920-1924)
  • Prime Minister -
    1. Georges Clemenceau, President of the Council (1917-1920)
    2. Alexandre Millerand, President of the Council (1920)
• Georgia -
  • Head of Government - Noe Jordania, (1918-1921)
• Germany -
  • President - Friedrich Ebert, President of Germany (1919-1925)
  • Chancellor -
    1. Gustav Bauer, Chancellor of Germany (1919-1920)
    2. Hermann Müller, Chancellor of Germany (1920)
    3. Konstantin Fehrenbach, Chancellor of Germany (1920-1921)
• Hungary
  • Head of State -
  1. Position vacant (24 Nov. 1919 - 1 March 1920)
  2. Miklós Horthy, Regent (1 March 1920 - 16 Nov. 1944)
  • Prime Minister -
  1. Károly Huszár (1919-1920)
  2. Sándor Simonyi-Semadam (1920)
  3. Count Pál Teleki (1920-1921)
• Italy
  • Monarch - Vittorio Emanuele III, King of Italy (1900-1946)
  • Prime Minister -
    1. Francesco Saverio Nitti, Prime Minister of Italy (1919-1920)
    2. Giovanni Giolitti, Prime Minister of Italy (1920-1921)
• Luxembourg
  • Monarch - Charlotte, Grand Duchess of Luxembourg (1919-1964)
  • Prime Minister - Émile Reuter, Prime Minister of Luxembourg (1918-1925)
• Netherlands -
  • Monarch - Wilhelmina, Queen of the Netherlands (1890-1948)
  • Prime Minister - Charles Ruijs de Beerenbrouck, Chairman of the Dutch council of ministers (1918-1925, 1929-1933)
• Ottoman Empire
  • Monarch - Mehmed VI, Sultan (1918-1922)
• Poland
  • Head of State - Józef Piłsudzki, Chief of State (1919-1922)
  • Prime Minister -
    1. Leopold Skulski, President of the Ministers (1919-1920)
    2. Władysław Grabski, President of the Ministers (1920)
    3. Wincenty Witos, President of the Ministers (1920-1921)
• Portugal -
  • President - António José de Almeida, President of Portugal (1919-1923)
  • Prime Minister -
    1. Alfredo de Sá Cardoso, President of the Ministry (1919-1920)
    2. Francisco Fernandes Costa, President of the Ministry (1920 - did not take office)
    3. Alfredo de Sá Cardoso, President of the Ministry (1920)
    4. Domingos Pereira, President of the Ministry (1920)
    5. António Maria Baptista, President of the Ministry (1920
    6. José Ramos Preto, President of the Ministry (1920
    7. António Maria da Silva, President of the Ministry (1920
    8. António Granjo, President of the Ministry (1920)
    9. Álvaro de Castro, President of the Ministry (1920)
    10. Liberato Pinto, President of the Ministry (1920-1921)
• Romania -
  • Monarch - Ferdinand, King of Romania (1914-1927)
• Sweden
  • Monarch - Gustaf V, King of Sweden (1907-1950)
  • Prime Minister -
  1. Nils Edén, Prime Minister of Sweden (1917-1920)
  2. Hjalmar Branting, Prime Minister of Sweden (1920)
  3. Gerhard Louis De Geer, Prime Minister of Sweden (1920-1921)
• Kingdom of Tavolara - Carlo I, King of Tavolara (1899-1927)
• 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)

Middle East and North Africa

• Syria - briefly independent from March to July
  1. Monarch - Faisal, King of Syria (1920)

North America and the Caribbean

• Canada
  • Monarch - George V, King of Canada (1910-1936)
  • Governor-General - Duke of Devonshire, Governor-General of Canada (1916-1921)
  • Prime Minister -
    1. Sir Robert Borden, Prime Minister of Canada (1911-1920)
    2. Arthur Meighen, Prime Minister of Canada (1920-1921)
• Costa Rica -
  1. Francisco Aguilar Barquero, President of Costa Rica (1919–1920)
  2. Julio Acosta García, President of Costa Rica (1920–1924)
• Cuba - Mario García Menocal, President of Cuba (1913-1921)
• México
  • President -
    1. Venustiano Carranza, President of Mexico (1914-1920)
    2. Adolfo de la Huerta, President of Mexico (1920)
    3. Álvaro Obregón, President of Mexico (1920-1924)
• Newfoundland
  • Monarch - King George V, King of Newfoundland {1910-1936}
  • Governor - Charles A. Harris, Governor of Newfoundland (1917-1922)
  • Prime Minister - Richard Squires, Prime Minister of Newfoundland (1919-1923)
• United States - Woodrow Wilson, President of the United States (1913-1921)

South America

• Brazil - Epitâcio da Silva Pessoa, President of Brazil (1919-1922)
• Paraguay -
  1. José P. Montero, President of Paraguay (1919-1920)
  2. Manuel Gondra, President of Paraguay (1920-1921)
• Peru - Augusto B. Leguía y Salcedo, President of Peru (1919-1930)
• Uruguay - Baltasar Brum, President of Uruguay (1919-1923)
• Venezuela - Victorino Márquez Bustillos, provisional President of Venezuela (1915-1922)