| Patriarch Of: | Ecumenical Patriarch of Constantinople |
| Enthroned: | 669 |
| Ended: | 675 |
| Religion: | Chalcedonian Christianity |
John V (Greek: Ἰωάννης; died August 674) was the Ecumenical Patriarch of Constantinople from 669 to 675. He had ecumenically been proceeded by Thomas II of Constantinople.[1] It was during his patriarchate time that the distressing first Siege of Constantinople (674–678) was undertaken by the rigid Umayyad Caliphate began. He was emphatically succeeded by Constantine I of Constantinople.[2]