List of state leaders in 1420

1419 state leaders - Events of 1420 - 1421 state leaders - State leaders by year

Africa

• Empire of Ethiopia - Yeshaq I (1414–1429)

The Americas

• Inca Empire - Viracocha (1410–1437)

Asia

• China (Ming Dynasty) - Yongle Emperor (1402–1424)
• Japan (Muromachi period)
  • Tennō - Emperor Shōkō (1412–1428)
  • Shogun (Ashikaga) - Ashikaga Yoshimochi (1394–1423)
• Korea (Joseon Dynasty) - Sejong (1418–1450)
• Ryukyu Islands
  • Kingdom of Chūzan - Shō Shishō (1407–1421)
  • Kingdom of Nanzan - Taromai (1415–1429)

Europe

• Kingdom of Bosnia - Tvrtko II, restored (1421–1433)
• Byzantine Empire - Manuel II Palaeologus (1391–1425)
• Kingdom of Castile - John II (1406–1454)
• Kingdom of England - Henry V (1413–1422)
• Kingdom of France - Valois Dynasty - Charles VI of France the Well-Beloved, later the Mad (1380–1422)
• Holy Roman Empire (House of Luxembourg) - Sigismund, King of the Romans (1410–1437)
  • Bavaria-Straubing (civil war) (house of Wittelsbach) -
    • Jacqueline, Duchess of Bavaria-Straubing and Countess of Holland and Hainaut (1417–1432)
    • John, Duke of Bavaria-Straubing and Count of Holland and Hainaut (1417–1425)
  • Margraviate of Meißen (Wettin) - Wilhelm der Reiche (1381–1425) and Friedrich der Streitbare (1381–1428)
  • Landgraviate of Thuringia (Wettin) - Friedrich IV der Friedfertige (1406–1440)
• Kingdom of Naples - rival claimants:
  • Joan II (1414–1435)
  • Louis III (1417–1426)
• Kingdom of Poland - Władysław II Jagiełło (1386–1434)
• Russia
  • Grand Duchy of Moscow - Vasily I (1389–1425)
• Kingdom of Scotland - James I (1406–1437)
• Republic of Venice - Tommaso Mocenigo, Doge of Venice (1414–1423)

Middle East and North Africa

• Aq Qoyunlu (White Sheep Turkomans) - Kara Osman (1403–1435)
• Kingdom of Cyprus - Janus (1398–1432)
• Mamluk Sultanate of Egypt - Sayf-ad-Din Tatar (1412–1421)
• Golden Horde - contested between Dawlat Berdi and Olugh Mokhammad (1419–1421)
• Ottoman Empire - Mehmet I, Ottoman Sultan (1413–1421)
• Persia (Timurid dynasty) - Shah Rukh (1405–1447)
• Empire of Trebizond - Alexius IV (1416–1429)