The following is the List of the Roman Catholic dioceses of Iran. List of dioceses Ecclesiastical Province of Tehran Archdiocese of Tehran (Chaldean) Ecclesiastical Province of Cilicia Eparchy of Ispahan (Armenian) Ecclesiastical Province of Urmya Archdiocese of Urmya (Chaldean) Diocese of Salmas (Chaldean) Immediately Subject to the Holy See Archdiocese of Teheran-Isfahan (Latin) Immediately Subject to the Patriarch Archeparchy of Ahwaz (Chaldean) External links GCatholic.org. Catholic-Hierarchy entry. Iran Catholic dioceses