List of state leaders in 940

This is a list of heads of state, heads of governments, and other rulers in the year 940.

Africa

• Ifriqiya – Muhammad al-Qa'im Bi-Amrillah, Fatimid Caliph (934–946)

Asia

• Abbasid Caliphate -
  • Ar-Radi (934–940)
  • Al-Muttaqi (940–944)
• China (Five Dynasties and Ten Kingdoms period) –
  • Later Jin – 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 -
    1. Henry I, Duke of Lotharingia (939–940)
    2. 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)
• Iberia -
  • 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 (Navarre) - García Sánchez I (931–970)
  • County of Ribagorza - Bernard I Humfred (920–c. 950)
• 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 -
  • Kingdom of Italy - Hugh of Arles, King of Italy (924–947)
    • Duchy of Spoleto -
      1. Anscar, Duke of Spoleto (936–940)
      2. Sarlione, Duke of Spoleto (940–943)
    • Papal States - Pope Stephen VIII (939–942)
    • March of Tuscany - Humbert (936–961)
  • 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)
  • Principality of Salerno - Guaimar II (901–946)
  • Republic of Venice - Pietro Participazio, Doge of Venice (939–942)
• Kievan Rus' - Igor, Prince of Kiev (912–945)
• Kingdom of 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)
• Volga Bulgaria - Mikail bine Cäğfär (925–943)
• Wales -
  • Deheubarth - Hywel Dda, Prince of Deheubarth (909–950)
  • Kingdom of Gwynedd - Idwal Foel (916–942)
  • Kingdom of Powys - Llywelyn ap Merfyn (900–942)