List of state leaders in 721

720 state leaders - Events of 721 - 722 state leaders - State leaders by year----

Africa

*Makuria - Merkurios, King of Makuria (697-722)
*Nekor - Salih I ibn Mansur, King of Nekor (710-749)

America

*Calakmul - Yuknoom Yich'aak K'ak, (702-731)
*Copán - Uaxaclajuun Ub'aah K'awiil, (675-738)
*Tikal - Hasaw Chan K'awil, (682-732)

Asia

*China (Tang Dynasty) - Xuanzong, Emperor of Tang China (712-756)
*Japan (Nara Period) - Genshō, Empress of Japan (715-724)
*"'Korea - Balhae and Unified Silla
**Silla - Seongdeok the Great, King of Silla (702-737)
**Balhae - Mu of Balhae, also known as Dae Muye (718-737)
*Pallava - Parameswaran II, King of Pallava, (710-775)
*Tibet - Khri-lde gtsug-brtan, Emperor of Tibet (680-743)

Europe

*Asturias - Pelayo, King of Asturias (718-737)
*Bulgars - King of the Bulgars
*#Tervel, (701-721)
*#Kormesiy, (721-738)
*Byzantine Empire - Leo III the Isaurian, Roman Emperor (717-741)
*Dál Riata - Selbach mac Ferchair, King of Dál Riata (700-723)
*East Anglia - Aelfwald, King of East Anglia (713-749)
*Essex - King of Essex
**Saelred, (709-746)
**Swaefbert, (715-738)
*Franks
**Theuderic II, King of the Franks (720-737)
**Charles Martel, Mayor of the Palace (714-741)
***Aquitaine - Odo the Great, Duke of Aquitaine (c.715-730)
*Gwynedd - Rhodri Molwynog ap Idwal, King of Gwynedd (720-754)
*Ireland - Cináed mac Írgalaig, High King of Ireland (720-722)
**Connacht - Indrechtach mac Muiredach Muillethan, King of Connacht (714-723)
**Hy-Many - Dluthach mac Fithcheallach, King of Hy-Many (711-738)
**Leinster - Murchad mac Bran Mut, King of Leinster (715-727)
*Lombards - Liutprand, King of the Lombards (712-744)
*Kent - Wihtred, King of Kent (690-725)
*Klarjeti - Nerse, Duke of Klarjeti (705-742)
*Mercia - Ethelbald, King of Mercia (716-757)
*Northumbria - Osridc, King of Northumbria (718-729)
*Picts - Nechtan mac Derile, King of the Picts (706-724)
*Serbs - Ratimir, King of the Serbs (700-730)
*Strathclyde - Bili, King of Strathclyde (694-722)
*Venice - Marcello Tegalliano, Doge of Venice (717-726)
*Wessex - Ine, King of Wessex (688-726)
**Sussex - Sub-kings of Sussex
***Nothelm (fl.692-725)
***Watt (fl.692-725)

Middle East

*Caliphate - Yazid II, Caliph of Damascus (720-724)