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