Patriarch Joannicius of Constantinople may refer to:
Joannicius I of Constantinople, Ecumenical Patriarch in 1524–1525 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