List of state leaders in 1055

This is a list of heads of state, heads of governments, and other rulers in the year 1055.

Africa

• Fatimid Caliphate – al-Mustansir Billah (1036–1094)
• Hammadid dynasty – Buluggin ibn Muhammad (1046–1062)
• Ifriqiya (Zirid dynasty) – Al-Mu'izz ibn Badis (1016–1062)
• Wagadou (Ghana Empire) – Bassi (1040–1062)

Americas

Asia

• Byzantine Empire –
  1. Constantine IX Monomachos (Κωνσταντίνος Θ' ο Μονομάχος) (1042–1055)
  2. Theodora (Θεοδώρα) (1055–1056) – restored
• Abbasid Caliphate (Baghdad) – Al-Qa'im (1031–1075)
• China (Northern Song dynasty) – Emperor Renzong (1022–1063)
• Chola Empire – Rajendra Chola II, Emperor (1054–1063)
• Đại Việt –Lý Thánh Tông, Emperor (1054–1072)
• Ghaznavid Empire – Jamal ud-Dawlah Farrukhzad (1053–1059)
• Japan (Heian period) –
  • Monarch – Emperor Go-Reizei (1045–1068)
  • Regent (Sesshō/Kampaku) – Fujiwara no Yorimichi, Kampaku (1020–1068); Sesshō (1017–1020)
• Khitan Empire –
  1. Xingzong (1031–1055)
  2. Daozong (1055–1101)
• Khmer Empire – Udayadityavarman II (1050–1066)
• Korea (Goryeo Kingdom) – Munjong (1046–1083)
• Great Seljuq Empire – Tughril (1037–1063)
• Western Xia – Emperor Yizong (1048–1067)

Europe

• Kingdom of Aragon – Ramiro I (1035–1063)
• County of Barcelona – Ramon Berenguer I (1035–1076)
• Byzantine Empire –
  1. Constantine IX Monomachos (1042–1055)
  2. Theodora (1055–1056)
• Kingdom of Castile – Ferdinand I the Great (1035–1065)
• Kingdom of Croatia – Stjepan (1030–1058)
• Kingdom of Denmark – Sweyn Estridson (1047–1076)
• Kingdom of England – Edward III the Confessor (1042–1066)
• Kingdom of France – Henry I (1031–1060)
  • County of Angoulême – Fulk (1048–1089)
  • County of Anjou – Geoffrey II Martel (1040–1060)
  • Duchy of Aquitaine – William VII (1039–1058)
  • County of Auvergne – William V (1032–1064)
  • County of Blois & County of Champagne – Theobald III(I) (1037–1089)
  • County of Boulogne – Eustace II (1049–1093)
  • Duchy of Brittany – Conan II of Rennes (1040–1066)
  • Duchy of Burgundy – Robert I (1032–1076)
  • County of Flanders – Baldwin V (1037–1067)
  • Duchy of Normandy – William the Bastard (1035–1087)
  • County of Toulouse – Pons (1037- c. 1061)
• Kingdom of Georgia – Bagrat IV (1027–1072)
• Holy Roman Empire – Henry III (1039–1056)
  • Margraviate of Austria – Ernest (1055–1075)
  • Barrois – Sophie, Countess of Bar (1033–1092)
  • Duchy of Bavaria – Henry VIII (1055–1061)
  • Duchy of Bohemia –
    1. Bretislav I (1035–1055)
    2. Spytihnev II (1055–1061)
  • County of Burgundy – Renaud I (1026–1057)
  • Duchy of Carinthia – Welf (1047–1055)
  • Prince-Bishopric of Liège – Theodwin of Liège (1048–1075)
  • Duchy of Lower Lorraine – Frederick of Luxembourg (1046–1065)
    • County of West Friesland – Floris I, Count of West Friesland (1049–1061)
  • Duchy of Upper Lorraine – Gerhard (1048–1070)
  • County Palatine of Lotharingia – Heinrich I (1045–1061)
  • Kingdom of Provence – Fulk Bertrand & Geoffroi I (1018–1051 & 1032–1062)
  • County of Savoy – Amadeus I (1048- c. 1056)
  • Duchy of Saxony – Bernard II (1011–1059)
  • Duchy of Swabia – Otto III (1048–1057)
  • Bishopric of Utrecht – William I (1054–1076)
• Holy See – Pope Victor II (1055–1057)
• Kingdom of Hungary – Andrew (1047–1061)
• Ireland –
  • Donnchad mac Briain, High King of Ireland (1024–1064)
  • Toirdelbach Ua Briain, High King of Ireland (1055–1086)
• Kievan Rus' – Iziaslav (1054–1078)
• Kingdom of León – Ferdinand I the Great (1037–1065)
• Kingdom of Navarre – Sancho IV (1054–1076)
• Kingdom of Norway – Harald Hardråde (1046–1066)
• Duchy of Poland – Casimir I (1039–1058)
• Kingdom of Scotland – Macbeth (1040–1057)
• Kingdom of Sweden – Emund (1050–1060)
• Republic of Venice – Domenico Contarini, Doge of Venice (1043–1071)
• Wales (List of rulers of Wales)
  • Deheubarth –
    1. Gruffydd ap Rhydderch (1047–1055)
    2. Gruffydd ap Llywelyn (1055–1063)
  • Glywysing – Gruffydd ap Rhydderch (1033–1055)
  • Kingdom of Gwent – Meurig ap Hywel & Cadwgan ap Meurig (1045–1055 & 1045–1074)
  • Kingdom of Gwynedd – Gruffydd ap Llywelyn (1033–1063)