John Komnenos
John Komnenos or Comnenus may refer to:
- John Komnenos (Domestic of the Schools), Byzantine general and progenitor of the Komnenian dynasty
- John Komnenos (parakoimomenos), Byzantine nobleman and official
- John II Komnenos, Byzantine emperor from 1118 to 1143
- John Komnenos (governor of Dyrrhachium), Byzantine governor of Dyrrhachium
- John Tzelepes Komnenos,, Byzantine nobleman who defected to the Seljuk Turks
- John Komnenos Vatatzes, Byzantine general
- John Doukas Komnenos, military governor of Cyprus
- John Komnenos (son of Andronikos I), second son and co-emperor of Andronikos I
- John Komnenos the Fat, Byzantine nobleman who attempted a usurpation in 1200
- John Komnenos Asen, ruler of the Principality of Valona