List of state leaders in 1820

1819 state leaders - Events of 1820 - 1821 state leaders - State leaders by year

See also:

• List of religious leaders in 1820
• List of colonial governors in 1820

Africa

• Ashanti Confederacy - Osei Bonsu, Asantehene (1804–1824)
• Buganda - Kamaya, King of Buganda (1814–1836)
• Bunyoro - Nyamutukura Kyebambe III, Omukama of Bunyoro (1786–1835)
• Burundi - Ntare IV Rugamba, King of Burundi (1796–1852)
• Dahomey - Gézo, King of Dahomey (1818–1856)
• Ethiopia - Iyoas II, Emperor of Ethiopia (1818–1821)
  • Shewa - Sahle Selassie, Negus (1813–1847)
• Sokoto Caliphate
  • Caliph - Muhammed Bello, Sokoto Caliph (1814–1837)
  • Grand Vizier - Gidago dan Laima, Sokoto Grand Vizier (1817–1842)
• Ndzuwani - Abdallah bin Alawi, Sultan of Ndzuwani (1816–1832)
• Rwanda - Yuhi III, Mwami of Rwanda (1797–1830)
• Swaziland - Paramount chief Ngwane IV (1815–1836)
• Zulu - Shaka, King of the Zulu (1816–1828)

Americas

• Chile - Bernardo O'Higgins, Supreme Director (1817–1823)
• Kingdom of Brazil (part of the United Kingdom of Portugal, Brazil, and the Algarve) - John VI, King (1815–1821)
• Paraguay - José Gaspar Rodríguez de Francia, Consul of Paraguay (1814–1840)
• United Provinces of the Río de la Plata
  1. José Rondeau, Supreme Director (1819–1820)
  2. Juan Pedro Aguirre, Supreme Director (1820)
• United States - James Monroe, President of the United States (1817–1825)

Asia

• Afghanistan -
  • Kabul/Peshawar - Ayub Shah, King of Afghanistan (1819–1823)
  • Kandahar - Shirdil Khan, Mohammedzay Regent (1818–1826)
  • Herat - Mahmud Shah, Padshah of Herat (1819–1826)
• Ahom - Sudingphaa (1818–1821)
• China (Qing Dynasty) -
  • 1. Jiaqing, Emperor of China (1796–1820)
    2. The Daoguang Emperor, Emperor of China (1820–1850)
• Japan
  • Monarch - Ninko, Emperor of Japan (1817–1846)
  • Shogun (Tokugawa) - Tokugawa Ienari, Shogun of Japan (1786–1837)
  • Ryūkyū Kingdom - Shō Kō, King of Ryūkyū (1804–1828)
• Korea (Joseon Dynasty) - Sunjo, King of Joseon (1800–1834)
• Persia - Fat′h-Ali Shah Qajar, Qajar dynasty (1797–1834)
• Siam - Rama II, King (1809–1824)
• Sikh Empire (Punjab) - Ranjit Singh, Maharaja (1801–1839)
• Vietnam - Gia Long, Emperor (1762–1820)

Europe

• Abkhazia - Safar Begi, Prince of Abkhazia (1810–1821)
• Andorra -
  • Bernat Francés y Caballero, Bishop of Urgell (1817–1824)
  • Louis XVIII, King of France (1815–1824)
• Denmark
  • Monarch - Frederick VI, King of Denmark (1808–1839)
  • Prime Minister - Heinrich Ernst, Minister of State of Denmark (1818–1824)
• France -
  • Monarch - Louis XVIII, King of France (1815–1824)
  • Prime Minister -
    1. Comte Decazes, Prime Minister of France (1819–1820)
    2. Duc de Richelieu, Prime Minister of France (1820–1821)
• German Confederation
  • Austria - Francis I, Emperor of Austria (1792*-1835) *Note: Leader of Austria held the title of Archduke prior to 1804
  • Bohemia - Francis, King of Bohemia (1792–1835)
  • Prussia -
    • Monarch - Friedrich Wilhelm III, King of Prussia (1797–1840)
    • Chief Minister - Prince Karl August von Hardenberg, Chief Minister of Prussia (1810–1822)
  • Bavaria - Maximilian I, King of Bavaria (1799*-1825) *Note: Leader of Bavaria held title of Elector prior to 1805
  • Saxony - Frederick Augustus I, King of Saxony 1763*-1827) *Note: Leader of Saxony held the title of Elector prior to 1806
  • Hanover -
    1. George III, King of Hanover (1814–1820)
    2. George IV, King of Hanover (1820–1830)
    • Bremen, Duchy -
      1. George III of the United Kingdom (House of Hanover), Duke of Bremen (1760–1820, dispossessed from 1803–1813)
      2. George IV of the United Kingdom (House of Hanover), Duke of Bremen (1820–1823, title had turned void, Duchy incorporated in real union into Hanover in 1823)
    • Verden, Principality -
      1. George III of the United Kingdom (House of Hanover), Prince of Verden (1760–1820, dispossessed from 1803–1813)
      2. George IV of the United Kingdom (House of Hanover), Prince of Verden (1820–1823, title had turned void, Principality incorporated in real union into Hanover 1823)
  • Württemberg - William, King of Württemberg (1816–1864)
  • Luxembourg - William I, Grand Duke of Luxembourg (1815–1840)
  • Liechtenstein - Johann Josef I, Prince of Liechtenstein (1805–1836)
• Hungary - Francis, King of Hungary (1792–1835)
• Moresnet
  • Monarchs -
    • William I, King of the Netherlands (1815–1840)
    • Friedrich Wilhelm III, King of Prussia (1797–1840)
  • Mayor - Arnold Timothée de Lasaulx, Mayor of Moresnet (1817–1859)
• United Kingdom of the Netherlands - William I, King of the Netherlands (1815–1840)
• Ottoman Empire
  • Monarch - Mahmud II, Sultan of the Ottoman Empire (1808–1839)
  • Grand Vizier -
    1. Dervis Mehmed Pasha, Ottoman Grand Vizier (1818–1820)
    2. Seyyid Ali Pasha, Ottoman Grand Vizier (1820–1821)
• Portugal - John VI, King of Portugal (1816–1826)
• Russia - Alexander I, Tsar of Russia (1801–1825)
• Spain - Ferdinand VII, King of Spain (1808, 1814–1833)
• Sweden - United Kingdoms of Sweden and Norway - Charles XIV John, King of Sweden (1818–1844)
• Tuscany - Ferdinand III, Grand Duke of Tuscany (1814–1824)
• Two Sicilies - Ferdinand I, King of the Two Sicilies (1816–1825)
• United Kingdom
  • Monarch -
    1. George III, King of the United Kingdom (1760–1820)
    2. George IV, King of the United Kingdom (1820–1830)
  • Regent -
    1. The Prince of Wales, Regent of the United Kingdom (1811–1820)
    2. became King
  • Prime Minister - Robert Banks Jenkinson, 2nd Earl of Liverpool, Prime Minister of the United Kingdom (1812–1827)

Middle East and North Africa

• Abu Dhabi -
  • Co-Shaikh - Shakhbut bin Dhiyab, Shaikh of Abu Dhabi (1818–1833)
  • Co-Shaikh - Tahnun bin Shakhbut, Shaikh of Abu Dhabi (1818–1833)
• Ajman - Rashid bin Humayd, Shaikh of Ajman (1816–1838)
• Bahrain - Sheikh Salman ibn Ahmad Al-Khalifa, Ruler of Bahrain (1796–1825)
• Egypt - Muhammad Ali Pasha, Governor of Egypt (1805–1848)
  • Kel Ahaggar - Ag Mama ag Sidi, Ruler of Kel Ahaggar (1790–1830)
• Kuwait - Sheikh Jabir ibn Abdullah Al Sabah, Ruler of Kuwait (1814–1859)
• Lebanon - Bashir ibn al-Qasim ibn Umar, Emir of Lebanon (1801–1821)
• Morocco - Slimane, Sultan of Morocco (1792–1822)
• Oman - Sa'id II ibn Sultan, Sultan of Oman (1804–1856)
• Persia - Fat′h Ali Shah Qajar, Shah of Persia (1797–1834)
• Tunis (under Ottoman suzerainty) - Mahmud, Bey of Tunis (1814–1824)