The term Apostolic Vicariate of Constantinople may refer to:
Roman Catholic Apostolic Vicariate of Constantinople, former name (until 1990) of the present Apostolic Vicariate of Istanbul Bulgarian Catholic Apostolic Vicariate of Constantinople, former Apostolic Vicariare for Catholic Bulgarians of the Byzantine Rite (1861-1926)
See also Apostolic Vicariate Constantinople Catholic Church in Turkey Bulgarian Byzantine Catholic Church