List of state leaders in 1003

This is a list of heads of state, heads of governments, and other rulers in the year 1003.

Africa

• Fatimid Caliphate – Abū 'Alī al-Manṣūr al-Ḥākim bi-Amr Allāh (996-1021)
  • Ifriqiya – Badis ibn Mansur, Zirid dynasty Viceroy (995-1016)

Asia

• Kingdom of Ani – Gagik I (989-1020)
• Byzantine Empire – Basil II Bulgaroktonus (976-1025)
• Abbasid Caliphate (Baghdad) – Al-Qadir (991-1031)
• China (Northern Song dynasty) – Emperor Zhenzong (997-1022)
• Ghaznavid Empire – Mahmud of Ghaznavid (998-1030)
• Japan (Heian period) –
  • Monarch – Emperor Ichijō (986-1011)
  • de facto – Fujiwara no Michinaga (995-1017)
• Khitan Empire – Shengzong (982-1031)
• Khmer Empire – Jayaviravarman (1002–1011) & Suryavarman I (1001–1050)
• Korea (Goryeo Kingdom) – Mokjong (997-1009)
• Kingdom of Mataram – Dharmawangsa (985-1006)
• Chola Empire (Tamil Nadu) – Rajaraja Chola (985-1014)

Europe

• Bulgaria – Samuil, Tsar of Bulgaria (977–1014)
• Kingdom of Burgundy – Rudolf III (993–1032)
  • County of Burgundy – Otto-William (982–1026)
  • County of Provence –
    • Rotbold II (968–1008)
    • William II (993–1018)
  • County of Savoy – Humbert I (1003–1047/1048)
• Byzantine Empire – Basil II the Bulgar-slayer (976–1025)
• Caucasus
  • Bagratuni Kingdom of Armenia – Gagik I (989–1020)
  • Kingdom of Georgia – Gurgen (994–1008)
  • Principality of Kakheti – David (976–1010)
  • Klarjeti – Sumbat III, Prince of Klarjeti (993–1011)
• Kingdom of Croatia –
  • Krešimir III, co-King (1000–1030)
  • Gojslav, co-King (1000–1020)
• Kingdom of Denmark – Sweyn I (985/986–1014)
• Kingdom of England – Æthelred the Unready (978–1013)
• Kingdom of France – Robert II (996–1031)
  • County of Angoulême – William IV (988–1028)
  • County of Anjou – Fulk III (987–1040)
  • Duchy of Aquitaine – William V (995–1030)
  • County of Blois – Theobald II (995–1004)
  • Duchy of Brittany – Geoffrey I (992–1008)
  • Duchy of Burgundy – Otto-William (1002–1004)
  • County of Flanders – Baldwin IV (987–1035)
  • County of Maine – Hugh III (992–1015)
  • Duchy of Normandy – Richard II (996–1026)
  • County of Toulouse – William III Taillefer (978–1037)
  • County of Vermandois – Albert II (c. 1000–1010)
• Duchy of Gascony – Bernard I William (996–1009)
• Holy Roman Empire – Henry II, King of Germany (1002–1024)
  • Duchy of Bavaria – Henry IV (995–1005)
    • March of Austria – Henry I (994–1018)
    • March of the Nordgau – Henry of Schweinfurt (994–1004)
  • Duchy of Bohemia –
    1. Vladivoj (1002–1003)
    2. Jaromir (1003)
    3. Boleslav III (1003)
    4. Bolesław IV the Brave (1003–1004)
  • Duchy of Carinthia – Otto I (1002–1004)
  • Duchy of Lower Lorraine – Otto (977–1012)
    • County of Frisia – Dirk III (993–1039)
    • County of Leuven – Lambert I (1003–1015)
    • County of Mons – Reginar IV (998–1013)
    • County of Namur – Albert I (c. 981–1011)
  • Duchy of Upper Lorraine – Theodoric I (978–1026/1027)
    • County of Bar – Theodoric I (978–1026/1027)
    • County of Luxembourg – Henry I (998–1026)
  • County Palatine of Lotharingia – Ezzo (996–1034)
  • Duchy of Saxony – Bernard I (973–1011)
    • Saxon Eastern March – Gero II (993–1015)
    • Northern March –
      1. Lothair (983–1003)
      2. Werner (1003–1009)
    • March of Meissen – Gunzelin (1002–1009)
  • Duchy of Swabia –
    1. Hermann II (997–1003)
    2. Hermann III (1003–1012)
• Kingdom of Hungary – Stephen I (1000–1038)
• Ireland – Brian Boru, High King of Ireland (1002–1014)
  • Ailech – Áed mac Domnaill Ua Néill, King of Ailech (989–1004)
  • Connacht – Cathal mac Conchobar mac Taidg, King of Connacht (973–1010)
  • Uí Maine – Tadhg Mór Ua Cellaigh, King of Uí Maine (985–1014)
  • Leinster –
    1. Donnchad mac Domnall Claen, King of Leinster (984–1003)
    2. Máelmórda mac Murchada, King of Leinster (1003–1014)
  • Kingdom of Mide – Máel Sechnaill mac Domnaill (c. 975–1022)
  • Kingdom of Munster – Brian Boru (978–1014)
• Kingdom of Italy – Arduin of Ivrea (1002–1004)
  • Duchy of Amalfi – Manso I (966–1004)
  • Principality of Benevento – Pandulf II (981–1014)
  • Principality of Capua – Landulf VII (999–1007)
  • Catepanate of Italy – Gregory Tarchaneiotes (998–1006)
  • Duchy of Gaeta – John III (984–1008)
  • March of Ivrea – Arduin (c. 990–1015)
  • March of Montferrat – William III (991–1042)
  • Duchy of Naples – Sergius IV (1002–1036)
  • Papal States –
    1. Pope Silvester II (999–1003)
    2. Pope John XVII (1003)
  • Principality of Salerno – Guaimar III (994–1027)
  • Emirate of Sicily – Ja'far al-Kalbi (998–1019)
  • Republic of Venice – Pietro II Orseolo, Doge of Venice (991–1009)
• Kievan Rus' – Vladimir I (980–1015)
  • Principality of Polotsk – Bryachislav (1001–1044)
  • Principality of Rostov – Yaroslav I the Wise (996–1010)
  • Principality of Turov – Sviatopolk Vladimirovich (997–1019)
• Kingdom of Norway –
  • Sveinn Hákonarson, Regent (1000–c. 1015)
  • Eiríkr Hákonarson, Regent (1000–1012)
  • Sweyn I (1000–1014)
• Poland – Bolesław I the Brave, Duke of Poland (992–1025)
• Kingdom of Alba (Scotland) – Kenneth III (997–1005)
• Serbia (Duklja) – Jovan Vladimir, Zhupan of Duklja (c. 990–1016)
• Spain -
  • County of Barcelona – Ramon Borrell (993–1017)
  • County of Castile – Sancho García (995–1017)
  • Caliphate of Córdoba –
    • Hisham II (976–1009)
    • Abd al-Malik al-Muzaffar, Hajib (1002–1008)
  • Kingdom of León – Alfonso V (999–1028)
    • County of Portugal – Mendo II Gonçalves (997–1008)
  • Kingdom of Pamplona – García Sánchez II (994–1004)
    • Kingdom of Viguera – García Ramírez (c. 1002–between 1005 and 1030)
  • County of Urgell – Ermengol I (993–1011)
• Kingdom of Sweden – Olof Skötkonung (995–1022)
• Wales -
  • Kingdom of Gwynedd – Cynan ap Hywel (999–1005)