1920 state leaders - Events of 1921 - 1922 state leaders - State leaders by year

Africa

• Ethiopia - Zauditu, Emperor of Ethiopia (1916-1930)
• Liberia - Charles D.B. King, President of Liberia (1920-1930)
• South Africa
  • Monarch - King George V, King of South Africa (1910-1936)
  • Governor-General - 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 (1920-1921)
    2. Yan Huiqing , Premier of the Republic of China (1921)
    3. Liang Shiyi , Premier of the Republic of China (1921-1922)
• Japan
  • Monarch - Taisho Emperor, Emperor of Japan (1912-1926)
  • Prime Minister -
    1. Hara Takashi, Prime Minister of Japan (1918-1921)
    2. Takahashi Korekiyo, Prime Minister of Japan (1921-1922)
• 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 - Henry Forster, 1st Baron Forster of Lepe, Governor-General of Australia (1920-1925)
  • Prime Minister - Billy Hughes, Prime Minister of Australia (1915-1923)

Europe

• Albania -
  1. First High Council (1920-1921)
  2. Second High Council (1921-1925)
• Austria -
  • President - Michael Hainisch , President of Austria (1920-1928)
  • Chancellor -
    1. Michael Mayr , Chancellor of Austria (1920-1921)
    2. Johann Schober , Chancellor of Austria (1921-1922)
• Belgium -
  • Monarch - Albert I, King of the Belgians (1909-1934)
  • Prime Minister -
    1. Henri, comte Carton de Wiart , Prime Minister of Belgium (1920-1921)
    2. Georges Theunis , Prime Minister of Belgium (1921-1925)
• Bulgaria -
  • Monarch - Boris III, King of the Bulgarians (1918-1943)
  • Prime Minister - Aleksandur Stamboliyski, Prime Minister of Bulgaria (1919-1923)
• Byelorussia -
  • Head of State - Aleksandr Chervyakov , Chairman of the Central Executive Committee (1920-1937)
• Czechoslovakia -
  • President - Tomás Masaryk, President of Czechoslovakia (1918-1935)
  • Prime Minister -
    1. Jan Cerny´ , Prime Minister of Czechoslovakia (1920-1921)
    2. Edvard Benes, Prime Minister of Czechoslovakia (1921-1922)
• Denmark -
  • Monarch - Christian X, King of Denmark (1912-1947)
  • Prime Minister - Niels Thomasius Neergaard , Prime Minister of Denmark (1920-1924)
• Estonia -
  1. Ants Piip , State Elder (1920-1921)
  2. Konstantin Päts, State Elder (1921-1922)
• Finland -
  • President - Kaarlo Juho Ståhlberg, President of Finland (1919-1925)
  • Prime Minister -
    1. Rafael Waldemar Erich , Prime Minister of Finland (1920-1921)
    2. Juho Heikki Vennola , Prime Minister of Finland (1921-1922)
• France -
  • President - Alexandre Millerand, President of France (1920-1924)
  • Prime Minister -
    1. Georges Leygues, President of the Council of Ministers (1920-1921)
    2. Aristide Briand, President of the Council of Ministers (1921-1922)
• Germany -
  • President - Friedrich Ebert, President of Germany (1919-1925)
  • Chancellor -
    1. Konstantin Fehrenbach, Chancellor of Germany (1920-1921)
    2. Joseph Wirth, Chancellor of Germany (1921-1922)
• Romania - Ferdinand, King of Romania (1914-1927)
• Greece -
  • Monarch - Constantine I, King of the Hellenes (1920-1922
  • Prime Minister -
    1. Dimitrios Rallis , Prime Minister of Greece (1920-1921)
    2. Nikolaos Kalogeropoulos , Prime Minister of Greece (1921)
    3. Dimitrios Gounaris, Prime Minister of Greece (1921-1922)
• Hungary -
  • Regent - Miklós Horthy, Regent of Hungary (1920-1944)
  • Prime Minister -
    1. Pál Teleki (1920-1921)
    2. Istvan Bethlen (1921-1931)
• Italy
  • Monarch - Vittorio Emanuele III, King of Italy (1900-1946)
  • Prime Minister -
    1. Giovanni Giolitti, Prime Minister of Italy (1920-1921)
    2. Ivanoe Bonomi, Prime Minister of Italy (1921-1922)
• Russia -
  • Head of State - Mikhail Kalinin, Chairman of the All-Russian Central Executive Committee (1919-1938)
  • Premier - Vladimir Lenin, Chairman of the Council of People's Commissars (1917-1924)
• Ukraine -
  • Head of State - Grigory Petrovsky , Chairman of the Central Executive Committee (1919-1938)
  • Premier - Christian Rakovsky, Chairman of the Council of People's Commissars (1920-1923)
• United Kingdom -
  • Monarch - George V, King of the United Kingdom (1910-1936)
  • Prime Minister - David Lloyd George (1916-1922)

North America and the Caribbean

• Canada -
  • Monarch - George V, King of Canada (1910-1936)
  • Governor-General -
    1. Duke of Devonshire, Governor-General of Canada (1916-1921)
    2. Viscount Byng of Vimy, Governor-General of Canada (1921-1926)
  • Prime Minister -
    1. Arthur Meighen, Prime Minister of Canada (1920-1921)
    2. William Lyon Mackenzie King, Prime Minister of Canada (1921-1926)
• Mexico - 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)
  • Warren G. Harding, President of the United States (1921-1923)

South America

• Brazil - Epitâcio da Silva Pessoa, President of Brazil (1919-1922)
• Paraguay -
  1. Manuel Gondra , President of Paraguay (1920-1921)
  2. Eusebio Ayala , President of Paraguay (1921-1923)
• Peru - Augusto B. Leguía y Salcedo, President of Peru (1919-1930)