Eleutherius of Bizantium (Greek: Ἐλευθέριος; died 136) was the bishop of Byzantium for approximately seven years (129 – 136).
[1] He succeeded bishop Diogenes of Byzantium.
He was in office during the rule of Roman emperor Hadrian.
His successor was Felix of Byzantium.
[2] This article about a bishop of the Early Church is a stub.