1240 state leaders - Events of 1241 - 1242 state leaders - State leaders by year

Asia

• China (Southern Song Dynasty) - Lizong, Emperor of China (1224-1264)
• Goryeo (Korea) - King Gojong, King of Goryeo (1213-1259)
• Japan
  • Monarch - Emperor Shijō, emperor of Japan (1232-1242)
  • Shogun (Kamakura) - Kujo Yoritsune, Shogun of Japan (1226-1244)
  • Shikken - Hojo Yasutoki, Shikken (1224-1242)
• Khmer Empire - Indravarman II (1220 - 1243)
• Mongol Empire -
  1. Ögedei Khan, Mongol Khan (1229-1241)
  2. Töregene Khatun, Mongol Regent (1241-1246)
• Pagan - Kyaswa, King of Pagan (1234-1250)

Europe

• Achaea - Geoffrey II Villehardouin, Principality of Achaea (c. 1228-1246)
• Angouleme - Hugh I, Count of Angouleme (1218-1249)
• Aragon - James I, King of Aragon and Count of Barcelona (1213-1276)
• Brittany - John I, Duke of Brittany (1237-1286)
• Bulgarian Empire -
  1. Ivan Asen II, Tsar of Bulgaria (1218-1241)
  2. Kaliman I, Tsar of Bulgaria (1241-1246)
• Castile - Ferdinand III of Castile, King of Castile and Leon (1217-1252)
• Champagne - Theobald IV, Count of Champagne (1201-1253)
• Denmark -
  1. Valdemar II, King of Denmark (1202-1241)
  2. Eric IV, King of Denmark (1241-1250)
• England - Henry III, King of England (1216-1272)
• Flanders - Jeanne, Countess of Flanders (1205 - 1244)
• France - Louis IX, King of France (1226-1270)
• Gwynedd - Dafydd ap Llywelyn, Prince of Gwynedd (1240-1246)
• Holy Roman Empire - Frederick II, Holy Roman Emperor (1220-1250)
  • Bohemia - Wenceslaus I, King of Bohemia (1230-1253)
  • Holland - William II, Count of Holland (1234-1256)
• Hungary - Béla IV, King of Hungary (1235-1270)
• Lithuania - Mindaugas, Grand Duke of Lithuania (1236-1253)
• Navarre - Theobald I of Navarre, King of Navarre (1235-1253)
• Norway - Håkon IV, King of Norway (1217-1263)
• Poland -
  1. Henry II, High Duke of Poland (1238 - 1241)
  2. Konrad of Mazovia, High Duke of Poland (1241 - 1243)
• Portugal - Sancho II, King of Portugal (1223-1247)
• Scotland - Alexander II, King of Scotland (1214-1249)
• Sweden - Eric XI, King of Sweden (1222-1229, 1234-1250)

Middle East and North Africa

• Almohad Caliphate - Abdul-Wahid II, Almohad Caliph (1232-1242)
• Antioch - Bohemund V, Prince of Antioch (1233-1252)
• Armenia - Hethum I of Armenia, King of Armenia (1226-1270)
• Cyprus - Henry I, King of Cyprus (1218-1253)
• Damascus (Ayyubid dynasty) - As-Salih Ismail, Sultan of Damascus (1239-1245)
• Egypt (Ayyubid dynasty) - As-Salih Ayyub, Sultan of Egypt (1240-1249)