List of state leaders in 1403

This is a list of heads of state, heads of governments, and other rulers in the year 1403.

Africa

• Ethiopian Empire – Dawit I (1382–1413)

Asia

• China (Ming dynasty) - Yongle Emperor (1402–1424)
• Kingdom of Chūzan - Bunei (1395–1407)
• Kingdom of Hokuzan – Hananchi (1401–1416)
• Japan (Muromachi period)
  • Monarch – Emperor Go-Komatsu (1392–1412)
  • Ashikaga shogunate - Ashikaga Yoshimochi (1394–1423)
• Joseon (Korea) – Taejong (1400–1418)
• Kingdom of Nanzan – Ououso (1403–1413)
• Siam
  • Ayutthaya Kingdom – Ramrachathirat (1395–1408)
  • Sukhothai Kingdom – Maha Thammaracha III (1400–1419)

Europe

• Principality of Achaea – Maria II Zaccaria (1402–1404)
• Duchy of Athens – Antonio I Acciaioli (1402–1435)
• Duchy of the Archipelago – Giacomo I Crispo (1397–1418)
• Byzantine Empire – Manuel II Palaiologos (1391–1425)
• Kingdom of Castile – Henry III (1390–1406)
• Kingdom of England – Henry IV (1399–1413)
• Kingdom of France – Charles VI (1380–1422)
• Grand Duchy of Moscow – Vasili I Dmitriyevich (1389–1425)
• Germany - (House of Wittelsbach) - Ruprecht, King of the Romans (1400–1410)
  • Duchy of Bavaria-Straubing (House of Wittelsbach) - Albert and Count of Holland and County of Hainaut (1347–1404)
  • Margraviate of Meissen (Wettin) - William the One-Eyed (1349–1407), Wilhelm the Rich (1381–1425) and Friedrich the Belligerent (1381–1428)
  • Landgraviate of Thuringia (Wettin) - Balthasar, Landgrave of Thuringia (1349–1406)
• The Morea – Theodore I Palaiologos, Despot of Morea (1383–1407)
• Kingdom of Poland – Władysław II Jagiełło (1386–1434)
• Kingdom of Portugal and the Algarves – John I (1385–1433)
• Kingdom of Scotland – Robert III (1390–1406)
• Principality of Theodoro – Alexios I (1402–1434)
• Principality of Tver – Ivan (1400–1425)

Middle East and North Africa

• Aq Qoyunlu (White Sheep Turkomans) –
  1. White Sheep Turkomans granted control of a part of Anatolia by Tamerlane in 1402
  2. Qara Osman (1403–1435)
• Kingdom of Cyprus – Janus (1398–1432)
• Mamluk Sultanate of Egypt – Nasir-ad-Din Faraj (1399–1405)
• Empire of Trebizond – Manuel III (1390–1416)