List of state leaders in 1921

This is a list of heads of state, government leaders, and other rulers in the year 1921.

Africa

• Ethiopia
  • Monarch - Zewditu, Empress of Ethiopia (1916–1930)
  • Chief Minister - Habte Giyorgis, Chief Minister of Ethiopia (1909–1927)

• Liberia
  • President - Charles D. B. King, President of Liberia (1920–1930)

• Rif Republic (unrecognized secessionist state)
  • independence was proclaimed on 18 September 1921
  • President - Abd el-Krim, President of the Rif Republic (1921–1926)

• South Africa
  • Monarch - George V, King of the British Dominions Beyond the Seas (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)

• Tripolitania (unrecognized secessionist state)
  • Head of State - Ahmad Tahir al-Murayyid, Chairman of the Central Reform Board of Tripolitania (1918–1923)

Asia

• Afghanistan
  • Monarch - Amanullah Khan, Emir of Afghanistan (1919–1929)

• Asir
  • Monarch - Sayyid Muhammad ibn Ali al-Idrisi, Emir of Asir (1909–1923)

• Bukhara
  • Communist Party Leader -
    1. Aslamhodzha Umarhodzhayev, First Secretary of the Communist Party of Bukhara (1920–1921)
    2. Sagdulla Tursunhodzhayev, First Secretary of the Communist Party of Bukhara (1921–1923)
  • Head of State -
    1. Mirza Abdulqodir Mansurovich Mukhitdinov, Chairman of the Central Revolutionary Committee of Bukhara (1920–1921)
    2. Polat Khodzhayev, Chairman of the Presidium of the Central Executive Committee of Bukhara (1921–1922)
  • Premier -
    1. Polat Khodzhayev, Chairman of the Council of People's Commissars of Bukhara (1920–1921)
    2. Fayzulla Khodzhayev, Chairman of the Council of People's Commissars of Bukhara (1921–1924)

• China
  • Nationalist Government
    • Head of State -
      1. Governing Committee of the Military Government, Head of State of China (1920–1921)
      2. Sun Yat-sen, Extraordinary President of China (1921–1922)
  • Beiyang Government
    • President - Xu Shichang, President of China (1918–1922)
    • Premier -
      1. Jin Yunpeng, Premier of State Council of China (1920–1921)
      2. Yan Huiqing, Acting Premier of State Council of China (1921)
      3. Liang Shiyi, Premier of State Council of China (192–1922)
  • Tibet (unrecognized, de facto independent country)
    • Monarch - Thubten Gyatso, Dalai Lama (1879–1933)

• Far Eastern Republic
  • Head of State -
    1. Alexander Krasnoshchyokov, Chairman of the Government of the Far Eastern Republic (1920–1921)
    2. Nikolay Matveyev, Chairman of the Government of the Far Eastern Republic (1921–1922)
  • Premier -
    1. Boris Shumyatsky, Chairman of the Council of Ministers of the Far Eastern Republic (1920–1921)
    2. Pyotr Nikiforov, Chairman of the Council of Ministers of the Far Eastern Republic (1921)
    3. Nikolay Matveyev, Chairman of the Council of Ministers of the Far Eastern Republic (1921–1922)

• Hejaz
  • Monarch - Hussein bin Ali, King of Hejaz (1908–1924)

• Jabal Shammar
  • incorporated into Nejd on 2 November 1921
  • Monarch -
    1. ʿAbdullah bin Mutʿib, Emir of Jabal Shammar (1920–1921)
    2. Muhammad bin Talāl, Emir of Jabal Shammar (1921)

• Japan
  • Monarch - Yoshihito, Emperor of Japan (1912–1926)
  • Regent - Crown Prince Hirohito, Regent of Japan (1921–1926)
  • Prime Minister -
    1. Hara Takashi, Prime Minister of Japan (1918–1921)
    2. Count Uchida Kosai, Acting Prime Minister of Japan (1921)
    3. Viscount Takahashi Korekiyo, Prime Minister of Japan (1921–1922)

• Khorezm
  • Communist Party Leader -
    1. Mulla Sultanmuradov, First Secretary of the Communist Party of Khorezm (1920–1921)
    2. Muhamedzhan Izetdinov, First Secretary of the Communist Party of Khorezm (1921)
    3. Berdi Gadzhiev, First Secretary of the Communist Party of Khorezm (1921)
    4. Gaifi Sharafutdinov, First Secretary of the Communist Party of Khorezm (1921–1923)
  • Head of State -
    1. Hoji Pahlavon Niyoz Yusuf, Chairman of the Presidium of the Assembly of People's Representatives of Khorezm (1920–1921)
    2. Qoch Qoroghli, Chairman of Provisional Revolutionary Committee of Khorezm (1921)
    3. Khudoybergan Divanoghli, Chairman of the Presidium of the Assembly of People's Representatives of Khorezm (1921)
    4. Mulla Nozir, Chairman of the Presidium of the Central Executive Committee of Khorezm (1921)
    5. Allabergan, Chairman of the Presidium of the Central Executive Committee of Khorezm (1921)
    6. Ata Maqsum Madrahimoghli, Chairman of the Presidium of the Central Executive Committee of Khorezm (1921)
    7. Jangibay Murodoghli, Chairman of the Presidium of the Central Executive Committee of Khorezm (1921–1922)
  • Premier -
    1. Muhammed Salimoglu, Chairman of the Council of People's Commissars of Khorezm (1920–1921)
    2. Koch Karaglu, Chairman of the Council of People's Commissars of Khorezm (1921)
    3. Temurkhoja Yaminoghli, Chairman of the Council of People's Commissars of Khorezm (1921)
    4. Sultanmurad Kany, Chairman of the Council of People's Commissars of Khorezm (1921–1924)

• Mongolia
  • independence declared again on 3 February 1921
  • Communist Party Leader -
    1. Soliin Danzan, Chairman of the Central Committee of the Mongolian People's Revolutionary Party (1921)
    2. Dogsomyn Bodoo, Chairman of the Central Committee of the Mongolian People's Revolutionary Party (1921–1922)
  • Monarch - Bogd Khan, Khan of Mongolia (1921–1924)
  • Prime Minister -
    1. Khatanbaatar Magsarjav, Prime Minister of Mongolia (1921)
    2. Dambyn Chagdarjav, Prime Minister of Mongolia (1921)
    3. Dogsomyn Bodoo, Prime Minister of Mongolia (1921–1922)

• Muscat and Oman
  • Monarch - Taimur bin Feisal, Sultan of Muscat and Oman (1913–1932)

• Nejd
  • the Emirate of Nejd and Hasa was superseded by the Sultanate of Nejd on 22 August 1921
  • Monarch - Ibn Saud, Sultan of Nejd (1902–1953)

• Nepal
  • Monarch - Tribhuvan, King of Nepal (1911–1950)
  • Prime Minister - Chandra Shamsher Jang Bahadur Rana, Maharaja of Lamjung and Kaski, Prime Minister of Nepal (1901–1929)

• Ottoman Empire
  • Monarch - Mehmed VI, Emperor of the Ottomans (1918–1922)
  • Head of Government - Ahmed Tevfik Pasha, Grand Vizier of the Ottoman Empire (1920–1922)

• Persia
  • Monarch - Ahmad Shah Qajar, Shah of Persia (1909–1925)
  • Prime Minister -
    1. Fathollah Khan Akbar, Prime Minister of Persia (1920–1921)
    2. Zia'eddin Tabatabaee, Prime Minister of Persia (1921)
    3. Ahmad Qavam, Prime Minister of Persia (1921)
    4. Malek Mansur Mirza Shao es-Saltaneh, Prime Minister of Persia (1921–1922)
  • Gilan (Persian Socialist Soviet Republic) (unrecognized state)
    • re-incorporated into Persia on 23 October 1921
    • President - Ihsan Allah Khan, President of the Persia (1920–1921)

• Siam
  • Monarch - Vajiravudh, King of Siam (1910–1925)

• Tannu Tuva
  • declared independence on 14 August 1921
  • Communist Party Leader - Nimachyan, General Secretary of the Tuvan People's Revolutionary Party (1921–1923)
  • Head of State - Mongush Buyan-Badyrgy, Chairman of the Constituent Khural of Tannu Tuva (1921)
  • Premier - Sodnam Balchir, Chairman of the Central Council of Tannu Tuva (1921–1922)

• Yemen (unrecognized state)
  • Monarch - Yahya Muhammad Hamid ed-Din, Imam of Yemen (1904–1948)

Australia and Oceania

• Australia
  • Monarch - George V, King of the British Dominions Beyond the Seas (1910–1936)
  • Governor-General - Henry Forster, Baron Forster, Governor-General of Australia (1920–1925)
  • Prime Minister - Billy Hughes, Prime Minister of Australia (1915–1923)

• New Zealand
  • Monarch - George V, King of the British Dominions Beyond the Seas (1910–1936)
  • Governor-General - John Jellicoe, Viscount Jellicoe, Governor-General of New Zealand (1920–1924)
  • Prime Minister - William Massey, Prime Minister of New Zealand (1912–1925)

Europe

• Albania
  • Head of State - High Council of Regency, Head of State of Albania (1920–1925)
  • Prime Minister -
    1. Iliaz Vrioni, Prime Minister of Albania (1920–1921)
    2. Pandeli Evangjeli, Prime Minister of Albania (1921)
    3. Qazim Koculi, Prime Minister of Albania (1921)
    4. Hasan Prishtina, Prime Minister of Albania (1921)
    5. Idhomene Kosturi, Acting Prime Minister of Albania (1921)
    6. Xhafer Bej Ypi, Prime Minister of Albania (1921–1922)
  • Mirdita (unrecognized state)
    • claimed independence between 17 July to 20 November 1921
    • President - Gjon Markagjoni, President of Mirdita (1921)

• Andorra
  • Monarchs -
    • French Co-Prince - Alexandre Millerand, French Co-Prince of Andorra (1920–1924)
      • Co-Prince's Representative - Charles Romeu (1887–1933)
    • Episcopal Co-Prince - Justí Guitart i Vilardebó, Episcopal Co-Prince of Andorra (1920–1940)
      • Co-Prince's Representative - Joseph de Riba (1915–1933)
  • First Syndic - Bonaventura Villarubia, First Syndic of Andorra (1920–1923)

• Armenia
  • Communist Party Leader -
    1. Gevork Alikhanyan, First Secretary of the Communist Party of Armenia (1920–1921)
    2. Sergey Lukashin, First Secretary of the Communist Party of Armenia (1921–1922)
  • Head of State -
    1. Sarkis Kasyan, Chairman of the Military Revolutionary Committee of Armenia (1920–1921)
    2. Aleksandr Myasnikyan, Chairman of the Council of People's Commissars of Armenia (1921–1922)
  • Mountainous Armenia (unrecognized state)
    • claimed independence between 26 April and 13 July 1921
    • Head of State - Garegin Nzhdeh, Commander of Mountainous Armenia (1920–1921)

• Austria
  • President - Michael Hainisch, Federal President of Austria (1920–1928)
  • Chancellor -
    1. Michael Mayr, Federal Chancellor of Austria (1920–1921)
    2. Johann Schober, Federal Chancellor of Austria (1921–1922)

• Azerbaijan
  • Communist Party Leader -
    1. Grigory Kaminsky, First secretary of the Azerbaijani Communist Party (1920–1921)
    2. Sergey Kirov, First secretary of the Azerbaijani Communist Party (1921–1926)
  • Head of State -
    1. Nariman Narimanov, Chairman of the Provisional Revolutionary Committee of Azerbaijan (1920–1921)
    2. Mukhtar Hajiyev, Chairman of the Central Executive Committee of Azerbaijan (1921–1922)
  • Premier - Nariman Narimanov, Chairman of the Council of People's Commissars of Azerbaijan (1921–1922)

• Belgium
  • Monarch - Albert I, King of the Belgians (1909–1934)
  • Prime Minister -
    1. Henri Carton de Wiart, Prime Minister of Belgium (1920–1921)
    2. Georges Theunis, Prime Minister of Belgium (1921–1925)

• Bulgaria
  • Monarch - Boris III, Tsar of the Bulgarians (1918–1943)
  • Premier - Aleksandar Stamboliyski, Chairman of the Council of Ministers of Bulgaria (1919–1923)

• Byelorussia
  • Communist Party Leader - Vilhelm Knorin, First secretary of the Byelorussian Communist Party (1920–1923)
  • Head of State - Alexander Chervyakov, Chairman of the Central Executive Committee of Byelorussia (1920–1937)
  • Premier - Alexander Chervyakov, Chairman of the Council of People's Commissars of Byelorussia (1920–1924)

• Czechoslovakia
  • President - Tomáš Garrigue Masaryk, President of Czechoslovakia (1918–1935)
  • Prime Minister -
    1. Jan Černý, Prime Minister of Czechoslovakia (1920–1921)
    2. Edvard Beneš, Prime Minister of Czechoslovakia (1921–1922)

• Danzig (free city under League of Nations protection)
  • High Commissioner -
    1. Bernardo Attolico, League of Nations High Commissioner for Danzig (1920–1921)
    2. Sir Richard Haking, League of Nations High Commissioner for Danzig (1921–1923)
  • Head of State - Heinrich Sahm, President of the Senate of Danzig (1920–1931)

• Denmark
  • Monarch - Christian X, King of Denmark (1912–1947)
  • Prime Minister - Niels Neergaard, Prime Minister of Denmark (1920–1924)

• Estonia
  • Head of State -
    1. Ants Piip, State Elder of Estonia (1920–1921)
    2. Konstantin Päts, State Elder of Estonia (1921–1922)

• Finland
  • President - Kaarlo Juho Ståhlberg, President of Finland (1919–1925)
  • Prime Minister -
    1. Rafael Erich, Prime Minister of Finland (1920–1921)
    2. Juho Vennola, Prime Minister of Finland (1921–1922)

• Fiume
  • Head of State -
    1. Antonio Grossich, Chairman of the Provisional Government of Fiume (1920–1921)
    2. Riccardo Gigante, President of the Provisional Directory of Fiume (1921)
    3. Salvatore Bellasich, Commissioner Extraordinary of Fiume (1921)
    4. Antonio Foschini, High commissioner of Fiume (1921)
    5. Luigi Amantea, High commissioner of Fiume (1921)
    6. Riccardo Zanella, President of Fiume (1921–1922)

• France
  • President - Alexandre Millerand, President of France (1920–1924)
  • Prime Minister -
    1. Georges Leygues, President of the Council of Ministers of France (1920–1921)
    2. Aristide Briand, President of the Council of Ministers of France (1921–1922)

• Georgia
  • the Democratic Republic of Georgia was superseded by the Georgian Soviet Socialist Republic on 25 February 1921
  • Communist Party Leader - Mamia Orakhelashvili, First secretary of the Georgian Communist Party (1921–1922)
  • Head of State -
    1. Nikolay Chkheidze, Chairman of the Constituent Assembly of Georgia (1919–1921)
    2. Polikarp Mdivani, Chairman of the Revolutionary Committee of Georgia (1921–1922)
  • Prime Minister - Noe Zhordania, Prime Minister of Georgia (1918–1921)

• Germany
  • President - Friedrich Ebert, President of Germany (1919–1925)
  • Chancellor -
    1. Constantin Fehrenbach, Chancellor of Germany (1920–1921)
    2. Joseph Wirth, Chancellor of Germany (1921–1922)

• 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
  • Head of State - Miklós Horthy, Regent of Hungary (1920–1944)
  • Prime Minister -
    1. Count Pál Teleki, Prime Minister of Hungary (1920–1911)
    2. Count István Bethlen, Prime Minister of Hungary (1921–1931)
  • Baranya-Baja (unrecognized state)
    • claimed independence between 14 to 20 August 1921
    • Head of State - Petar Dobrović, President of the Executive Committee of Hungarian-Serbian Baranya-Baja Republic (1921)
  • Lajtabánság (unrecognized state)
    • claimed independence between 4 October to 5 November 1921
    • Head of State - Pál Prónay, Leader of Lajtabánság (1921)

• Iceland
  • Monarch - Christian X, King of Iceland (1918–1944)
  • Prime Minister - Jón Magnússon, Prime Minister of Iceland (1917–1922)

• Italy
  • Monarch - Victor Emmanuel III, King of Italy (1900–1946)
  • Prime Minister -
    1. Giovanni Giolitti, President of the Council of Ministers of Italy (1920–1921)
    2. Ivanoe Bonomi, President of the Council of Ministers of Italy (1921–1922)
  • Labin Republic (unrecognized secessionist state)
    • claimed independence between 2 March and 8 April 1921
    • Leaders - Giovanni Pipan and Francesco da Gioz (1921)

• Latvia
  • Head of State - Jānis Čakste, President of the Constituent Assembly of Latvia (1918–1927)
  • Prime Minister -
    1. Kārlis Ulmanis, Prime Minister of Latvia (1918–1921)
    2. Zigfrīds Anna Meierovics, Prime Minister of Latvia (1921–1923)

• Liechtenstein
  • Monarch - Johann II, Prince of Liechtenstein (1859–1929)
  • Head of Government -
    1. Joseph Peer, Land Administrator of Liechtenstein (1920–1921)
    2. Josef Ospelt, Head of Government of Liechtenstein (1921–1922)

• Lithuania
  • President - Aleksandras Stulginskis, President of Lithuania (1920–1926)
  • Prime Minister - Kazys Grinius, Prime Minister of Lithuania (1920–1922)
  • Central Lithuania (unrecognized state)
    • Head of State - Lucjan Żeligowski, Head of State of Central Lithuania (1920–1922)
    • Head of Government -
      1. Witold Abramowicz, Chairman of the Provisional Commission of Government of Central Lithiania (1920–1921)
      2. Stefan Mokrzecki, Acting Chairman of the Provisional Commission of Government of Central Lithiania (1921)
      3. Aleksander Michal Marian Meysztowicz, Chairman of the Provisional Commission of Government of Central Lithiania (1921–1922)

• Luxembourg
  • Monarch - Charlotte, Grand Duchess of Luxembourg (1919–1964)
  • Prime Minister - Émile Reuter, President of the Government of Luxembourg (1918–1925)

• Monaco
  • Monarch - Albert I, Prince of Monaco (1889–1922)
  • Head of Government - Raymond Le Bourdon, Minister of State of Monaco (1919–1923)

• Netherlands
  • Monarch - Wilhelmina, Queen of the Netherlands (1890–1948)
  • Prime Minister - Charles Ruijs de Beerenbrouck, Chairman of the Council of Ministers of the Netherlands (1918–1925)

• Norway
  • Monarch - Haakon VII, King of Norway (1905–1957)
  • Prime Minister -
    1. Otto Bahr Halvorsen, Prime Minister of Norway (1920–1921)
    2. Otto Blehr, Prime Minister of Norway (1921–1923)

• Poland
  • Head of State - Józef Piłsudski, Chief of State of Poland (1918–1922)
  • Prime Minister -
    1. Wincenty Witos, President of the Council of Ministers of Poland (1920–1921)
    2. Antoni Ponikowski, President of the Council of Ministers of Poland (1921–1922)

• Portugal
  • President - António José de Almeida, President of Portugal (1919–1923)
  • Premier -
    1. Liberato Pinto, President of the Ministry of Portugal (1920–1921)
    2. Bernardino Machado, President of the Ministry of Portugal (1921)
    3. Tomé de Barros Queirós, President of the Ministry of Portugal (1921)
    4. António Granjo, President of the Ministry of Portugal (1921)
    5. Manuel Maria Coelho, President of the Ministry of Portugal (1921)
    6. Carlos Maia Pinto, President of the Ministry of Portugal (1921)
    7. Francisco Cunha Leal, President of the Ministry of Portugal (1921–1922)

• Romania
  • Monarch - Ferdinand I, King of the Romanians (1914–1927)
  • Premier -
    1. Alexandru Averescu, President of the Council of Ministers of Romania (1920–1921)
    2. Take Ionescu, President of the Council of Ministers of Romania (1921–1922)

• Russia
  • Head of State - Mikhail Kalinin, Chairman of the Central Executive Committee of the All-Russian Congress of Soviets (1919–1946)
  • Premier - Vladimir Lenin, Chairman of the Council of People's Commissars of Russia (1917–1924)

• San Marino
  • Captains Regent -
    1. Carlo Balsimelli and Simone Michelotti, Captains Regent of San Marino (1920–1921)
    2. Marino Della Balda and Vincenzo Francini, Captains Regent of San Marino (1921)
    3. Egisto Morri and Giuseppe Lanci, Captains Regent of San Marino (1921–1922)

• Serbs, Croats and Slovenes
  • Monarch -
    1. Peter I, King of the Serbs, Croats and Slovenes (1903–1921)
    2. Alexander I, King of the Serbs, Croats and Slovenes (1921–1934)
  • Prime Minister -
    1. Milenko Radomar Vesnić, Prime Minister of the Kingdom of Serbs, Croats and Slovenes (1920–1921)
    2. Nikola Pašić, Prime Minister of the Kingdom of Serbs, Croats and Slovenes (1921–1924)

• Spain
  • Monarch - Alfonso XIII, King of Spain (1886–1931)
  • Prime Minister -
    1. Eduardo Dato e Iradier, President of the Council of Ministers of Spain (1920–1921)
    2. Gabino Bugallal Araújo, Count of Bugallal, Acting President of the Council of Ministers of Spain (1921)
    3. Manuel Allendesalazar y Muñoz de Salazar, President of the Council of Ministers of Spain (1921)
    4. Antonio Maura, President of the Council of Ministers of Spain (1921–1922)

• Sweden
  • Monarch - Gustaf V, King of Sweden (1907–1950)
  • Prime Minister -
    1. Baron Gerhard Louis De Geer, Prime Minister of Sweden (1920–1921)
    2. Oscar von Sydow, Prime Minister of Sweden (1921)
    3. Hjalmar Branting, Prime Minister of Sweden (1921–1923)

• Switzerland
  • Federal Council:

    Giuseppe Motta (1911–1940), Edmund Schulthess (1912–1935, President), Robert Haab (1917–1929), Ernest Chuard (1919–1928), Karl Scheurer (1919–1929), Jean-Marie Musy (1919–1934), Heinrich Häberlin (1920–1934)

• Ukraine
  • Ukrainian Soviet Socialist Republic (unrecognized state)
    • Communist Party Leader -
      1. Vyacheslav Molotov, First Secretary of the Central Committee of the Communist Party (1920–1921)
      2. Feliks Kon, Executive Secretary of the Central Committee of the Communist Party (1921)
      3. Dmitry Manuilsky, First Secretary of the Communist Party (1921–1923)
    • Head of State - Grigory Petrovsky, Chairman of the Central Executive Committee of Ukraine (1919–1938)
    • Premier - Christian Rakovsky, Chairman of the Council of People's Commissars of Ukraine (1920–1923)
  • Ukrainian People's Republic
    • absorbed by Soviet Ukraine on 7 May 1921
    • Head of State - Symon Petliura, Chairman of the Directory of Ukraine (1919–1921)

• 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)
  • Ireland (unrecognized state)
    • President - Éamon de Valera, President of Ireland (1919–1922)

North America and the Caribbean

• Canada
  • Monarch - George V, King of the British Dominions Beyond the Seas (1910–1936)
  • Governor General -
    1. Victor Cavendish, Duke of Devonshire, Governor General of Canada (1916–1921)
    2. Julian Byng, Baron 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)

• Costa Rica
  • President - Julio Acosta García, President of Costa Rica (1920–1924)

• Cuba
  • President -
    1. Mario García Menocal, President of Cuba (1913–1921)
    2. Alfredo Zayas y Alfonso, President of Cuba (1921–1925)

• Dominican Republic (under US occupation)
  • Governor -
    1. Thomas Snowden, Governor of Santo Domingo (1919–1921)
    2. Samuel Robison, Governor of Santo Domingo (1921–1922)

• El Salvador
  • President - Jorge Meléndez, President of El Salvador (1919–1923)

• Guatemala
  • President -
    1. Carlos Herrera, President of Guatemala (1920–1921)
    2. José María Orellana, President of Guatemala (1921–1926)

• Haiti (under US occupation)
  • Military Commander - John H. Russell, Jr., Military Commander of Haiti (1919–1930)
  • President - Philippe Sudré Dartiguenave, President of Haiti (1915–1922)

• Honduras
  • President - Rafael López Gutiérrez, President of Honduras (1920–1924)

• Mexico
  • President - Álvaro Obregón, President of Mexico (1920–1924)

• Newfoundland
  • Monarch - George V, King of the British Dominions Beyond the Seas (1910–1936)
  • Governor - Sir Charles Alexander Harris, Governor of Newfoundland (1917–1922)
  • Prime Minister - Sir Richard Squires, Prime Minister of Newfoundland (1919–1923)

• Nicaragua
  • President -
    1. Emiliano Chamorro Vargas, President of Nicaragua (1917–1921)
    2. Diego Manuel Chamorro, President of Nicaragua (1921–1923)

• Panama
  • President - Belisario Porras Barahona, President of Panama (1920–1924)

• United States
  • President -
    1. Woodrow Wilson, President of the United States (1913–1921)
    2. Warren G. Harding, President of the United States (1921–1923)

South America

• Argentina
  • President - Hipólito Yrigoyen, President of Argentina (1916–1922)

• Bolivia
  • Head of State -
    1. Government Junta, Head of State of Bolivia (1920–1921)
    2. Bautista Saavedra, President of Bolivia (1921–1925)

• Brazil
  • President - Epitácio Pessoa, President of Brazil (1919–1922)

• Chile
  • President - Arturo Alessandri, President of Chile (1920–1924)

• Colombia
  • President -
    • Marco Fidel Suárez, President of Colombia (1918–1922)
    • Jorge Holguín, Acting President of Colombia (1921–1922)

• Ecuador
  • President - José Luis Tamayo, President of Ecuador (1920–1924)

• Paraguay
  • President -
    1. Manuel Gondra, President of Paraguay (1920–1921)
    2. Eusebio Ayala, Acting President of Paraguay (1921–1923)

• Peru
  • President - Augusto B. Leguía, President of Peru (1919–1930)
  • Prime Minister - Germán Leguía y Martínez Jakeway, President of the council of ministers of Peru (1919–1922)

• Uruguay
  • President - Baltasar Brum, President of Uruguay (1919–1923)

• Venezuela
  • President - Victorino Márquez Bustillos, Provisional President of Venezuela (1914–1922)