List of state leaders in 1255

1254 state leaders - Events of 1255 - 1256 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 Go-Fukakusa, emperor of Japan (1246-1260)
** Shogun (Kamakura) - Prince Munetaka, Shogun of Japan (1252-1266)
** Shikken - Hojo Tokiyori, Shikken (1246-1256)
*Khmer Empire - Jayavarman VIII (1243 - 1295)
*Mongol Empire - Möngke Khan, Mongol Khan (1251-1260)
*Pagan - Narathihapate, King of Pagan (1254-1287)
*Sukhotai - Pho Khun Si Indrathit, King of Sukhothai (1249-1257)

Europe

*Achaea - William II Villehardouin, Principality of Achaea (1246-1278)
*Angouleme - Hugh II, Count of Angouleme (1249-1260)
*Aragon - James I, King of Aragon (1213-1276)
*Bohemia - Ottokar II, King of Bohemia (1253-1278)
*Brittany - John I, Duke of Brittany (1237-1286)
*Bulgarian Empire - Micheal II Asen, Tsar of Bulgaria (1246-1256)
*Castile - Alfonso X of Castile, King of Castile and Leon (1252-1284)
*Champagne - Theobald V, Count of Champagne (1253-1270)
*Denmark - Christopher I, King of Denmark (1252-1259)
*England - Henry III, King of England (1216-1272)
*Flanders - Margaret II, Countess of Flanders (1244 - 1278)
*France - Louis IX, King of France (1226-1270)
*Gwynedd - Llywelyn the Last, Prince of Gwynedd (1246-1282)
*Holy Roman Empire - William, King of the Romans (1254-1256)
*Hungary - Béla IV, King of Hungary (1235-1270)
*Lithuania - Mindaugas, King of Lithuania (1253-1263)
*Navarre - Theobald II of Navarre, King of Navarre (1253-1270)
*Norway - Håkon IV, King of Norway (1217-1263)
*Poland - Boleslaus V, High Duke of Poland (1243 - 1279)
*Portugal - Alfonso III, King of Portugal (1249-1279)
*Scotland - Alexander III, King of Scotland (1249-1286)
*Sweden
**Monarch - Valdemar I, King of Sweden (1250-1275)
**Regent - Birger Jarl, regent of Sweden (1250-1266)

Middle East and North Africa

*Almohad Caliphate - Umar, Almohad Caliph (1248-1266)
*Antioch - Bohemund VI, Prince of Antioch (1252-1268)
*Armenia - Hethum I of Armenia, King of Armenia (1226-1270)
*Cyprus - Hugh II, King of Cyprus (1253-1267)
*Damascus - An-Nasir Yusuf, Ayyubid Sultan of Damascus (1250-1260)
*Egypt - Aybak, Sultan of Egypt (1254-1257)