| Felix of Byzantium | |
| Patriarch Of: | Bishop of Byzantium |
| Enthroned: | 136 |
| Ended: | 141 |
| Predecessor: | Eleutherius of Byzantium |
| Successor: | Polycarpus II of Byzantium |
| Religion: | Early Christianity |
Felix (Greek: Φῆλιξ; died 141) was the bishop of Byzantium for five years (136–141 AD). He succeeded Bishop Eleutherius. He was in office during the rule of emperors Hadrian and Antoninus Pius. His successor was Polycarpus II.[1]