| Honorific Prefix: | Saint |
| Abadiu | |
| Titles: | Bishop of Antinoe |
| Birth Place: | Egypt |
| Death Place: | Egypt |
| Venerated In: | Catholic Church[1] Eastern Orthodox Church Oriental Orthodoxy |
| Feast Day: | 26 December |
Abadiu of Antinoe was a bishop of Antinoe (part of modern-day Egypt) in the Fourth Century. He is commemorated as a saint in the Coptic Orthodox Church, and is said to have been killed in a theological dispute with the Arians. His feast day is 26 December. He is referenced in Les Martyrs d'Égypte by Hippolyte Delehaye.