List of state leaders in 931
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930 state leaders - Events of 931 - 932 state leaders - State leaders by year

Africa

• Ifriqiya - Ubayd Allah al-Mahdi Billah, Fatimid Caliph (910-934)

Asia

• Byzantine Empire
  • Constantine VII, Byzantine Emperor (913-959)
  • Romanus I, Byzantine Emperor (919-943)
• China (Five Dynasties and Ten Kingdoms Period) -
  • Later Tang Dynasty - Mingzong, Emperor of Later Tang (926-933)
  • Chu - Ma Xisheng, King of Chu (930-932)
  • Dingnan - Li Renfu, Dingnan Jiedushi (909-933)
  • Jingnan (Nanping) - Gao Conghui, King of Nanping (928-948)
  • Min - Wang Yanjun, King of Min (926-933); Emperor of Min (933-935)
  • Southern Han - Liu Yan, Emperor of Southern Han (917-941)
  • Wu - Yang Pu, Emperor of Wu (921-937)
  • Wuyue - Qian Liu, King of Wuyue (907-932)
• 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 (Later Three Kingdoms Period)
  • Goryeo - Taejo, King of Goryeo (918-943)
  • Hubaekje - Gyeon Hwon, King of Hubaekje (900-935)
  • Silla - Gyeongsun, King of Silla (927-935)

Europe

• Benevento - Landulf I, Prince of Benevento (910-943)
• Bohemia - Wenceslaus I, Duke of Bohemia (921-935)
• Bulgaria - Peter I, Tsar of Bulgaria (927-969)
• Byzantine Empire
  • Constantine VII, Byzantine Emperor (913-959)
  • Romanus I, Byzantine Emperor (919-943)
• Córdoba - Abd-ar-Rahman III, Caliph of Córdoba (929-961)
• Denmark - Harthacnut, King of Denmark (c.917-c.948)
• England - Aethelstan, King of England (924-939)
• Galicia - Alfonso IV the Monk, King of Galicia (929-931)
• Germany - Henry the Fowler, King of Germany (919-936)
  • Bavaria - Arnulf the Bad, Duke of Bavaria (907-937)
  • Franconia - Eberhard III. Duke of Franconia (911-939)
  • Saxony - Henry I the Fowler, Duke of Saxony (912-936)
  • Swabia - Hermann I, Duke of Swabia (926-949)
• Hungary - Zoltan, Fejedelem of the Magyars (c.922-947)
• Italy - Rival Kings
  • Hugh of Arles, King of Italy (924-947)
  • Rudolf II of Burgundy. King of Italy (922-933)
• Kievan Rus - Igor, Grand Prince of Kiev (912-945)
• León -
  1. Alfonso IV the Monk, King of León (925-931)
  2. Ramiro II, King of León (931-951)
• Norway
  • Harald I Fairhair, King of Norway (872-933)
  • Eric I Bloodaxe, King of Norway (c.930-934)
• Papal States
  • Stephen VII, Pope (928-931)
  • John XI, Pope (931-936)
• Rome - Marozia, effective ruler of Rome (928-932)
• Scotland - Constantine II, King of Scotland (900-943)
• Venice - Orso II Participazio, Doge of Venice (912-932)
• Western Francia - Rudolph, King of Western Francia (923-936)
  • Anjou - Fulk I, Count of Anjou (898-941)
  • Aquitaine - Ebalus, Duke of Aquitaine (927-935)
  • Burgundy - Hugh the Black, Duke of Burgundy (923-952)
  • Flanders - Arnulf I, Count of Flanders (918-964)
  • Gascony - Gassia IV Sans, Duke of Gascony (c.930-?)
  • Normandy - William Longsword, Duke of Normandy (927-942)
  • Toulouse - Raymond III. Count of Toulouse (924-950)
  • Vermandois - Herbert II, Count of Vermandois (902-943)

Middle East

• Abbasid Caliphate - Al-Muqtadir, Abbasid Caliph (908-932)
• Byzantine Empire
  • Constantine VII, Byzantine Emperor (913-959)
  • Romanus I, Byzantine Emperor (919-943)