| John Doukas | |
| general | |
| Spouse: | Tornikina Komnene |
| Birth Date: | 13th c. |
| Death Date: | 13th c. |
| Issue: | Helena |
| Noble Family: | House of Angelos |
| Father: | Michael II Komnenos Doukas |
| Mother: | Theodora Petraliphaina |
John Doukas (Greek, Modern (1453-);: Ἰωάννης Δούκας, Iōannēs Doúkas) was a son of the Despot of Epirus, Michael II Komnenos Doukas, and a general in Byzantine service.
John was the second-born son of the Despot of Epirus, Michael II Komnenos Doukas, and Theodora Petraliphaina. In 1261 his mother brought him as a hostage to the Byzantine court at Constantinople, where he married Tornikina Komnene (of unknown first name), the second-born daughter of the sebastokrator Constantine Tornikios. The couple had at least one daughter, Helena, but the marriage was unhappy, with John apparently despising his wife. As a result, he was imprisoned and blinded in 1280, and committed suicide shortly after.