List of state leaders in 921

See also
List of state leaders in 920 Events of 921 List of state leaders in 922 State leaders by year

This is a list of heads of state, government leaders, and other rulers in the year 921.

Asia

Byzantine Empire – Romanos I Lekapenos (920–943), with
- Christopher Lekapenos (921–931)
- Constantine VII (913–959)
China (Five Dynasties and Ten Kingdoms period) –
- Later Liang – Modi, Emperor of Later Liang (913–923)
- Chu – Ma Yin, King of Chu (907–930)
- Dingnan – Li Renfu, Dingnan Jiedushi (909–933)
- Former Shu – Wang Yan, Emperor of Former Shu (918–925)
- Jin – Li Cunxu, King of Jin (908–923); Emperor of Later Tang (923–926)
- Jingnan – Gao Jixing, Jingnan Jiedushi (907–924); King of Nanping (924–928)
- Min – Wang Shenzhi, King of Min (909–925)
- Qi – Li Maozhen, King of Qi (901–924)
- Southern Han – Liu Yan, King of Nanhai (911–917); Emperor of Southern Han (917–941)
- Wu –
  1. Yang Longyan, King of Wu (908–921)
  2. Yang Pu, King of Wu (921–927); Emperor of Wu (927–937)
- Wuyue – Qian Liu, King of Wuyue (907–932)
- Yiwu –
  1. Wang Chuzhi, Yiwu Jiedushi (900–921)
  2. Wang Du, Yiwu Jiedushi (921–929)
- Zhao (Chengde) –
  1. Wang Rong, Chengde Jiedushi (883–921)
  2. Zhang Wenli, Ruler of Zhenzhou (921)
  3. Zhang Chujin, Ruler of Zhenzhou (921–922)
Japan – Emperor Daigo, emperor of Japan (897–930)
Khitan Empire – Taizu, Khitan Emperor (907–926)
Korea (Later Three Kingdoms Period)
- Balhae – Dae Inseon, King of Balhae (906–926)
- Goryeo – Taejo, King of Goryeo (918–943)
- Hubaekje – Gyeon Hwon, King of Hubaekje (900–935)
- Silla – Gyeongmyeong, King of Silla (917–924)

Europe

Bulgaria - Simeon I, Tsar of Bulgaria (893–927)
Upper Burgundy - Rudolph II, King of Upper Burgundy (912–937)
Byzantine Empire – Romanos I Lekapenos (920–943), with
- Christopher Lekapenos (921–931)
- Constantine VII (913–959)
Caucasus
- Kingdom of Armenia - Ashot II (914–928)
- Kingdom of Iberia - Adarnase IV (888–923)
- Principality of Kakheti - Padla II, Prince of Kakheti (918–929)
- Klarjeti - David Mampali (900–943)
Littoral Croatia - Tomislav, Duke of Littoral Croatia (910–925)
England (Heptarchy) -
- Danelaw -
  - Northumbria -
    1. Ragnall ua Ímair, King of Northumbria (918–921)
    2. Sihtric Cáech, King of Northumbria (921–927)
- Wessex - Edward the Elder, King of the Anglo-Saxons (899–924)
West Francia - Charles the Simple, King of West Francia (898–922)
- County of Angoulême - William II (916–945)
- County of Anjou - Fulk I (898–942)
- Aquitaine - William II, Duke of Aquitaine (918–926)
- Duchy of Brittany -
- Duchy of Burgundy -
  1. Richard the Justiciar (898–921)
  2. Rudolph, Duke of Burgundy (921–923)
- County of Flanders - Arnulf I (918–965)
- County of Maine - Hugh I (900–950)
- March of Neustria - Robert (911–922)
- Duchy of Normandy - Rollo (911–927)
- County of Paris - Robert I (888–923)
- County of Toulouse - Raymond II (918–924)
- Tours - Robert I, Count of Tours (888–922)
- County of Vermandois - Herbert II, Count of Vermandois (907–943)
Gascony - Gassia II, Duke of Gascony (893–c. 930)
Kingdom of Germany - Henry the Fowler, King of the Germans (919–936)
- Bavaria - Arnulf, Duke of Bavaria (907–937)
- Duchy of Bohemia -
  1. Vratislaus I, Duke of Bohemia (915–c. 921)
  2. Wenceslaus I, Duke of Bohemia (921–935)
- Duchy of Franconia - Eberhard III (918–939)
- Duchy of Saxony - Henry I the Fowler (912–936)
- Duchy of Swabia - Burchard II, Duke of Swabia (917–926)
Hungarian tribal federation - Zoltán, Grand Prince of the Magyars (c. 907–c. 948)
Ireland - Donnchad Donn, High King of Ireland (919–944)
- Ailech - Fergal mac Domnaill, King of Ailech (919–938)
- Connacht - Cathal mac Conchobair, King of Connacht (900–925)
- Uí Maine - Murchadh mac Sochlachan, King of Uí Maine (909–936)
- Leinster - Faelan mac Muiredach, King of Leinster (917–942)
- Kingdom of Mide - Donnchad Donn (919–944)
- Munster - Flaithbertach mac Inmainén, King of Munster (c. 914–922)
Italy - Berengar, King of Italy (887–924) and Holy Roman Emperor (915–924)
- Principality of Benevento - Landulf I (910–943)
- Principality of Capua - Landulf I (910–943)
- Duchy of Gaeta - John I, Hypatus of Gaeta (906–933)
- March of Ivrea - Adalbert I (902–923)
- Duchy of Naples - Marinus I (919–928)
- Papal States - Pope John X (914–928)
- Principality of Salerno - Guaimar II (901–946)
- Duchy of Spoleto - Alberic I (897–922)
- March of Tuscany - Guy (915–929)
- Republic of Venice - Orso II Participazio, Doge of Venice (912–932)
Kievan Rus' - Igor, Prince of Kiev (912–945)
Lotharingia - Charles the Simple, King of Lotharingia (911–922)
- County of Frisia - Dirk I (c. 896–923)
- County of Hainault - Reginar II (915–932)
Norway - Harald I Fairhair, King of Norway (872–930)
Kingdom of Provence -
- Louis the Blind (887–928)
- Hugh, count of Arles, Regent (905–928)
Kingdom of Alba (Scotland) - Constantine II (900–943)
Serbia -
1. Pavle Branović, Knez of Serbia (917–921)
2. Zaharije Pribisavljević, Knez of Serbia (921–924)
- Zahumlje - Mihailo Višević, Great Prince of Zahumlje (910–927)
Spain -
- County of Aragon - Galindo Aznárez II (893–922)
- Kingdom of Asturias - Fruela II (910–925)
- County of Barcelona - Sunyer, Count of Barcelona (911–947)
- Caliphate of Córdoba - Abd-ar-Rahman III (912–961)
- Kingdom of Galicia – Ordoño II (910–924)
- Kingdom of León - Ordoño II (914–924)
- County of Pallars - Isarn (920–948)
- Kingdom of Pamplona - Sancho I (905–925)
- 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)

Middle East

Abbasid Caliphate – Al-Muqtadir (908–932)
Byzantine Empire – co-emperors:
- Romanus I Lecapenus, (919–944)
- Constantine VII Porphyrogenitus (913–959)