List of state leaders in 940
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This is a list of heads of state, heads of governments, and other rulers in the year 940.
Africa
- Abbasid Caliphate
- Ar-Radi (934–940)
- Al-Muttaqi (940–944)
- Byzantine Empire
- Constantine VII (913–959)
- Romanus I (919–943)
- Ifriqiya – Muhammad al-Qa'im Bi-Amrillah, Fatimid Caliph (934–946)
Asia
- Abbasid Caliphate
- Ar-Radi (934–940)
- Al-Muttaqi (940–944)
- Byzantine Empire
- Constantine VII (913–959)
- Romanus I (919–943)
- China (Five Dynasties and Ten Kingdoms Period) –
- Later Jin Dynasty – Gaozu, Emperor of Later Jin (936–942)
- Chu – Ma Xifan, King of Chu (932–947)
- Dingnan – Li Yixing, Dingnan Jiedushi (935–967)
- Jingnan (Nanping) – Gao Conghui, King of Nanping (928–948)
- Later Shu – Meng Chang, Emperor of Later Shu (934–965)
- Min – Wang Yanxi, Emperor of Min (939–944)
- Southern Han – Liu Yan, Emperor of Southern Han (917–941)
- Southern Tang – Liezu, Emperor of Southern Tang (937–943)
- Wuyue – Qian Yuanguan, King of Wuyue (932–941)
- Japan –
- Monarch – Emperor Suzaku, emperor of Japan (930–946)
- Regent (Sessho) – Fujiwara no Tadahira, Sessho (930–941); Kampaku (941–949)
- Khitan Empire – Taizong, Khitan Emperor (926–947)
- Korea (Goryeo Dynasty) – Taejo, King of Goryeo (918–943)
Europe
- Bulgaria - Peter I, Tsar of Bulgaria (927–969)
- Kingdom of Burgundy - Conrad the Peaceful (937–993)
- Byzantine Empire -
- Constantine VII (913–959)
- Romanus I (920–944)
- Caucasus
- Kingdom of Armenia - Abas I (928–953)
- Kingdom of Iberia - Sumbat I (937–958)
- Principality of Kakheti - Kvirike II, Prince of Kakheti (929–976)
- Klarjeti - David Mampali (900–943)
- Kingdom of Croatia - Krešimir I (935–945)
- Kingdom of Denmark - Gorm the Old (c. 936–c. 958)
- Kingdom of England - Edmund I (939–946)
- Northumbria - Olaf III Guthfrithson, King of Northumbria (939–941)
- West Francia - Louis IV, King of West Francia (936–954)
- County of Angoulême - William II (916–945)
- County of Anjou - Fulk I (898–942)
- Duchy of Brittany - Alan II, Duke of Brittany (938–952)
- Duchy of Burgundy - Hugh the Black (923–952)
- County of Flanders - Arnulf I (918–965)
- County of Maine - Hugh I (900–950)
- March of Neustria - Hugh the Great (922–956)
- Duchy of Normandy - William I Longsword (927–942)
- County of Paris - Hugh the Great (923–956)
- County of Poitou - William III Towhead (935–963)
- County of Toulouse - Raymond III Pons (924–944)
- County of Vermandois - Herbert II, Count of Vermandois (907–943)
- Gascony - Sancho IV, Duke of Gascony (930–950/955)
- Kingdom of Germany - Otto I the Great, King of the Germans (936–973)
- Bavaria - Berthold, Duke of Bavaria (938–947)
- Duchy of Bohemia - Boleslaus I (935–972)
- Lotharingia -
- Henry I, Duke of Lotharingia (939–940)
- Otto, Duke of Lotharingia (940–944)
- County of Frisia - Dirk II (c. 939–988)
- County of Hainault - Reginar III (940–958)
- Duchy of Saxony - Otto I the Great (936–973)
- Billung March - Hermann Billung, Margrave of Billung March (936–973)
- Saxon East March - Gero, Margrave of Merseburg (937–965)
- Duchy of Swabia - Herman I, Duke of Swabia (926–949)
- Hungarian tribal federation - Zoltán, Grand Prince of the Magyars (c. 907–c. 948)
- Ireland - Donnchad Donn, High King of Ireland (919–944)
- Ailech - Muirchertach mac Néill, King of Ailech (938–943)
- Connacht - Tadg mac Cathail, King of Connacht (925–956)
- Uí Maine - Murchadh mac Aodha, King of Uí Maine (936–960)
- Leinster - Faelan mac Muiredach, King of Leinster (917–942)
- Kingdom of Mide - Donnchad Donn (919–944)
- Munster -
- Italy - Hugh of Arles, King of Italy (924–947)
- Principality of Benevento - Landulf I (910–943)
- Principality of Capua - Landulf I (910–943)
- Duchy of Gaeta - Docibilis II (933–954)
- March of Ivrea - Berengar II (923–940)
- Duchy of Naples - John III (928–968)
- Papal States - Pope Stephen VIII (939–942)
- Principality of Salerno - Guaimar II (901–946)
- Duchy of Spoleto -
- Anscar, Duke of Spoleto (936–940)
- Sarlione, Duke of Spoleto (940–943)
- March of Tuscany - Humbert (936–961)
- Republic of Venice - Pietro Participazio, Doge of Venice (939–942)
- Kievan Rus' - Igor, Prince of Kiev (912–945)
- Norway - Haakon I the Good, King of Norway (934–961)
- Kingdom of Alba (Scotland) - Constantine II (900–943)
- Serbia - Časlav Klonimirović, Zhupan of Serbia (927–960)
- Spain -
- County of Barcelona - Sunyer, Count of Barcelona (911–947)
- County of Castile - Fernán González (931–970)
- Caliphate of Córdoba - Abd-ar-Rahman III (912–961)
- Kingdom of León - Ramiro II (931–951)
- County of Portugal - Mumadona Dias (c. 924–c. 950)
- County of Pallars - Isarn (920–948)
- Kingdom of Pamplona - García Sánchez I (931–970)
- County of Ribagorza - Bernard I Humfred (920–c. 950)
- Wales -
- Deheubarth - Hywel Dda, Prince of Deheubarth (909–950)
- Kingdom of Gwynedd - Idwal Foel (916–942)
- Kingdom of Powys - Llywelyn ap Merfyn (900–942)