John Komnenos Choumnos (Greek: Ἰωάννης Κομνηνός Χοῦμνος, before 1290 – before 1339) was a Byzantine general, scholar and statesman.
[3][4] Through the influence of his father, he quickly rose in the imperial hierarchy and was named parakoimomenos tou koitonos.
He also led Byzantine forces against the Ottoman Turks in Bithynia in 1300–1306, under Michael IX Palaiologos.
[3][5] In 1308/1309 he married an unknown lady related to the ruling Palaiologos dynasty, with whom he had a son and a daughter.
[3] His stance in the Byzantine civil war of 1321–1328 is unknown, but his brother George Choumnos appears to have been a partisan of Andronikos II Palaiologos.