List of state leaders in 1266

This is a list of heads of state, heads of governments, and other rulers in the year 1266.

Asia

• China (Southern Song dynasty) - Emperor Duzong (1264–1274)
• Korea (Goryeo Kingdom) – Wonjong (1259–1274)
• Japan (Kamakura period)
  • Monarch – Emperor Kameyama (1260–1274)
  • Kamakura shogunate -
    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)
• Pagan Kingdom – Narathihapate (1254–1287)
• Sukhothai Kingdom – Si Inthrathit (1238–1270)

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 ap Gruffudd (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)
• Seljuks of Turkey

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

• Karamanids – Mehmet I (1261–1277)
• Empire of Trebizond

1. Andronikos II (1263–1266)
2. George (1266–1280)