List of state leaders in 1266

1265 state leaders - Events of 1266 - 1267 state leaders - State leaders by year

Asia

• China (Southern Song Dynasty) - Emperor Duzong (1264–1274)
• Korea (Goryeo Kingdom) - Wonjong (1259–1274)
• Japan (Kamakura period)
  • Monarch - Emperor Kameyama (1260–1274)
  • Shogun (Kamakura) -
    1. Prince Munetaka (1252–1266)
    2. Prince Koreyasu (1266–1289)
  • Shikken - Hōjō Masamura (1264–1268)
• Khmer Empire - Jayavarman VIII (1243–1295)
• Mongol Empire - Kublai Khan (1260–1294)
• Kingdom of Pagan - Narathihapate (1254–1287)
• Sukhothai Kingdom - Pho Khun Ban Muang (1257–1277)

Europe

• Principality of Achaea - William II Villehardouin (1246–1278)
• Kingdom of Aragon - James I (1213–1276)
• Kingdom of Bohemia - Ottokar II (1253–1278)
• Bulgarian Empire - Constantine Tikh, Tsar of Bulgaria (1257–1277)
• Byzantine Empire (Palaeologian dynasty) - Michael VIII (1259–1282)
• Crown of Castile - Alfonso X (1252–1284)
• Kingdom of Denmark - Eric V (1259–1286)
• Kingdom of England - Henry III (1216–1272)
• Kingdom of France - Louis IX (1226–1270)
• Kingdom of Gwynedd - Llywelyn the Last, Prince of Gwynedd (1246–1282)
• Holy Roman Empire - (disputed election) Richard, 1st Earl of Cornwall, King of the Romans (1257–1272) and Alfonso X of Castile, King of the Romans (1257–1284)
  • County of Holland - Floris V (1256–1296)
• Kingdom of Hungary - Béla IV (1235–1270)
• Grand Duchy of Lithuania - Vaišelga (1264–1267)
• Kingdom of Navarre - Theobald II (1253–1270)
• Kingdom of Norway - Magnus VI (1263–1280)
• Duchy of Poland - Bolesław V the Chaste, High Duke of Poland (1243–1279)
• Kingdom of Portugal - Afonso III (1249–1279)
• Kingdom of Scotland - Alexander III (1249–1286)
• Kingdom of Sweden
  • Monarch - Valdemar I (1250–1275)
  • Regent - Birger Jarl, regent of Sweden (1250–1266)

Middle East and North Africa

• Armenian Kingdom of Cilicia - Hethum I (1226–1270)
• Kingdom of Cyprus - Hugh II (1253–1267)
• Mamluk Sultanate of Egypt - Baibars (1260–1277)
• Ilkhanate - Abaqa (1265–1281)
• Sultanate of Rûm

1. Kilij Arslan IV, Sultan (1260–1266)
2. Keyhüsrev III, Sultan (1266–1284)