List of state leaders in 1040
1039 state leaders - Events of 1040 - 1041 state leaders - State leaders by year
Italic text==Africa==
- Algeria (Hammadid) - Qaid ibn Hammad (1028-1045)
- Egypt (Fatimids) - Ma'ad al-Mustansir Billah, Fatimid caliph (1035-1094)
Americas
Asia
- Ani - Gargis of Ani , King of Ani (1040-1040)
- Caliphate(Abbasid) - Al-Qa'im, Caliph in Baghdad (1031-1075)
- Ghaznavid Empire - Mas'ud I of Ghaznavid (1031-1041)
- Khmer Empire - Suryavarman I (1001-1050)
- Seljuk Turks - Toğrül (1037-1063
- Tamil Nadu - Rajendra Chola & Rajadhiraja Chola, Kings of Tamil Nadu (1012-1044 & 1054)
- China (Northern Song Dynasty) - Renzong, Emperor of Song China (1022-1063)
- Japan -
- Khitan Empire - Xingzong, Khitan Emperor (1031-1055)
- Korea (Goryeo Dynasty) - Jeongjong, King of Goryeo (1034-1046)
- Western Xia - Jingzong, Emperor of Western Xia (1032-1048)
Europe
- Aragon - Ramiro I, King of Aragon (1035-1063)
- Barcelona - Ramon Berenguer I, Count of Barcelona (1035-1076)
- Byzantine Empire - Michael IV, Byzantine emperor (1034-1041)
- Brittany -
- Castile - Ferdinand I, King of Castile (1035-1065)
- Croatia - Stjepan, King of Croatia (1030-1058)
- Denmark - Canute the Hardy, King of Denmark (1035-1042)
- England -
- France - Henry I, King of France (1031-1060)
- Auvergne - William V, Count of Auvergne (1032-1064)
- Angouleme - Geoffrey, Count of Angouleme (1032-1048)
- Anjou -
- Aquitaine - William VII, Duke of Aquitaine (1039-1058)
- Blois&Champagne - Theobald III(I), Count of Blois & Count of Champagne (1037-1089)
- Boulogne - Eustace I, Count of Boulogne (1032-1049)
- Burgundy (duchy) - Robert I, Duke of Burgundy (1032-1076)
- Flanders - Baldwin V, Count of Flanders (1037-1067)
- Maine - Hugh IV, Count of Maine (1036-1051)
- Normandy - William the Bastard, Duke of Normandy (1035-1087)
- Toulouse - Pons of Toulouse, Count of Toulouse (1037- c. 1061)
- Georgia - Bagrat IV, King of Georgia (1027-1072)
- Holy Roman Empire - Henry V, King of Germany (1039-1056), Duke of Bavaria (1026-1041), Duke of Swabia (1038-1045)
- Austria - Adalbert Margrave of Austria (1018-1055)
- Baden - Berthold I, Margrave of Baden (1024-1077)
- Barrois - Sophie of Bar, Count of Bar (1033-1092)
- Bohemia - Bretislav I, Duke of Bohemia (1035-1055)
- Burgundy (county) - Renaud I, count of Burgundy (1026-1057)
- Carinthia - Welf, Duke of Carinthia (1039-1055)
- Holland - Dirk IV, Count of Holland (1039–1049)
- Lower Lorraine - Gothelo the Great, Duke of Lower Lorraine (1023-1044)
- Upper Lorraine - Gothelo the Great, Duke of Upper Lorraine (1033–1044)
- Palatinate - Otto I of Swabia, Count Palatine of the Rhine (1034-1045)
- Provence - Foulques Bertrand & Geoffroi I, Counts of Provence (1018-1051 & 1032-1062)
- Savoy - Umberto I Biancamano, Count of Savoy (1003- c. 1048)
- Saxony - Bernard II, Duke of Saxony (1011-1059)
- Styria - ? vacant 1038-1047
- Utrecht - Bernold, Prince-Bishop of Utrecht (c. 1026-1054)
- Hungary - Peter Urseolo, King of Hungary (1038-1041)
- Ireland - Donnchad Ua Briain, High King of Ireland (1024-1064)
- Kyivan Rus' - Yaroslav I the Wise, ruler of Kyivan Rus' (1019–1054)
- Montferrat - Otto II of Montferrat, marquis of Montferrat (1017-1084)
- Navarre - Garcia III, King of Navarre (1035-1054)
- Norway - Magnus the Good, King of Norway (1035-1047)
- Scotland -
- Sweden - Anund Jacob, King of Sweden (1022-1050)
- Venice - Domenico Flabanico, Doge of Venice (1032-1043)
- Wales (List of rulers of Wales)
- Deheubarth - Hywel ab Edwin (1033-1044)
- Glywysing - Hywel ab Owain & Gryffydd ap Rhydderch (990-1043 & 1033-1055)
- Gwent - Edwyn ap Gwriad (1015-1045)
- Gwynedd - Gruffydd ap Llywelyn, Prince of Gwynedd (1033-1063)