Patriarch Joannicius may refer to:
Joannicius I of Constantinople, Ecumenical Patriarch in 1524–1525 Patriarch Joannicius of Alexandria, Greek Patriarch of Alexandria in 1645–1657 Joannicius II of Constantinople, Ecumenical Patriarch in 1646–1648, 1651–1652, 1653–1654 and 1655–1656 Joannicius III of Constantinople, Ecumenical Patriarch in 1761–1763