| Type: | Pope |
| Honorific-Prefix: | Saint |
| Celadion of Alexandria | |
| Pope and Patriarch of Alexandria | |
| Enthroned: | 16 January 152 |
| Ended: | 16 July 166 |
| Predecessor: | Markianos |
| Successor: | Agrippinus |
| Birth Place: | Alexandria, Egypt |
| Death Date: | 16 July 166 |
| Death Place: | Alexandria, Egypt |
| Buried: | Baucalis, Alexandria |
| Nationality: | Egyptian |
| Religion: | Coptic Orthodox Christian |
| Feast Day: | 16 July (9 Epip in the Coptic calendar) |
Pope Celadion (Keladionus) was the 9th Pope and Patriarch of Alexandria. He reigned from the year 152 to 166 AD.
Celadion was born in Alexandria, Egypt. He was elected Patriarch in the year 152 AD during the reign of Antoninus Pius.
He reigned for fourteen years, six months, and three days, and died during the reign of Marcus Aurelius and Lucius Verus, on the 9th of Epip (16 July), in the year 166 AD.[1]