| Honorific-Prefix: | His All Holiness |
| Cyril IV | |
| Patriarch Of: | Ecumenical Patriarch of Constantinople |
| Enthroned: | 1711 |
| Ended: | 1713 |
| Diocese: | Constantinople |
| See: | Ecumenical Patriarchate |
| Church: | Church of Constantinople |
| Predecessor: | Athanasius V |
| Successor: | Cyprianus |
| Birth Date: | unknown |
| Birth Place: | Mytilene |
| Death Date: | 1728 |
| Death Place: | Constantinople |
| Religion: | Eastern Orthodox Church |
| Occupation: | Ecumenical Patriarch |
Cyril IV (Greek, Modern (1453-);: Κύριλλος; died 1728) was the Ecumenical Patriarch of Constantinople from 1711 until his resignation in 1713.[1] [2] He was also metropolitan bishop of Cyzicus.
He was elected patriarch in 1709, but took office only after Athanasius V of Constantinople was deposed. He resigned in 1713 and remained in Constantinople until his death in 1728.