Patriarch John of Constantinople may refer to:

• Patriarch John I of Constantinople, Archbishop in 398–404
• Patriarch John II of Constantinople, Ecumenical Patriarch in 518–520
• Patriarch John III of Constantinople, Ecumenical Patriarch in 565–577
• Patriarch John IV of Constantinople, Ecumenical Patriarch in 582–595
• Patriarch John V of Constantinople, Ecumenical Patriarch in 669–675
• Patriarch John VI of Constantinople, Ecumenical Patriarch in 712–715
• Patriarch John VII of Constantinople, Ecumenical Patriarch in 837–843
• Patriarch John VIII of Constantinople, Ecumenical Patriarch in 1064–1075
• Patriarch John IX of Constantinople, Ecumenical Patriarch in 1111–1134
• Patriarch John X of Constantinople, Ecumenical Patriarch in 1198–1206
• Patriarch John XI of Constantinople, Ecumenical Patriarch in 1275–1282
• Patriarch John XII of Constantinople, Ecumenical Patriarch in 1294–1303
• Patriarch John XIII of Constantinople, Ecumenical Patriarch in 1315–1320
• Patriarch John XIV of Constantinople, Ecumenical Patriarch in 1334–1347