| Dometius of Byzantium | |
| Patriarch Of: | Bishop of Byzantium |
| Enthroned: | 272 |
| Ended: | 284 |
| Religion: | Early Christianity |
Dometius (Greek: Δομέτιος; died 284) was bishop of Byzantium from about 272 to about 284.
He was a brother of the Roman Emperor Probus. He converted to Christianity, and entered the clergy when he was baptised by the bishop of Byzantium Titus, whom he succeeded.
He had two sons, Probus and Metrophanes, who later became bishops of the same city.