Date | Country | Change |
| Unknown |  Greece | Titular Metropolitan See of Traianopolis (Armenian Rite) was established |
| Unknown |  Turkiye | Titular Episcopal See of Anazarbus (Armenian Rite) was established |
| Unknown | Turkiye | Titular Archiepiscopal See of Chalcedon (Armenian Rite) was established |
| Unknown | Turkiye | Titular Archiepiscopal See of Nisibis (Armenian Rite) was established |
| 294 |  Lebanon, Turkiye | Diocese of Cilicia (Armenian Rite) was established |
| 1630.10.24 |  Ukraine,  Moldova | Archdiocese of Lviv (Armenian Rite) was established (without ecclesiastical province) |
| 1650 | Turkiye | Diocese of Amida (Armenian Rite) was established |
| 1708 | Turkiye | Archdiocese of Mardin (Armenian Rite) was established |
| 1710 |  Syria | Diocese of Aleppo (Armenian Rite) was established (without ecclesiastical province) |
| 1735 | Turkiye | Diocese of Ancyra (Armenian Rite) was established |
| 1742.11.26 | Lebanon, Turkiye | Diocese of Cilicia (Armenian Rite) was promoted as Patriarchal See of Cilicia |
| 1774 | Turkiye | Diocese of Adana (Armenian Rite) was established |
| 1779 | Turkiye | Apostolic Vicariate of Istanbul (Armenian Rite) was established |
| 1830 | Turkiye | Apostolic Vicariate of Istanbul (Armenian Rite) was promoted as Archdiocese of Istanbul |
| 1842 | Turkiye | Diocese of Marasc (Armenian Rite) was established |
| 1850 | Turkiye | Diocese of Artvin (Armenian Rite) was established |
| 1850 | Turkiye | Diocese of Cesarea in Cappadocia (Armenian Rite) was established |
| 1850 | Turkiye | Diocese of Prusa (Armenian Rite) was established |
| 1850 | Turkiye | Diocese of Trapezus (Armenian Rite) was established |
| 1850.04.30 |  Iran | Diocese of Ispahan (Armenian Rite) was established (became suffragan of Cilicia) |
| 1850.04.30 | Turkiye | Diocese of Ancyra (Armenian Rite) was restored |
| 1850.04.30 | Turkiye | Diocese of Garin (Armenian Rite) was established |
| 1858 | Turkiye | Diocese of Sebaste (Armenian Rite) was established |
| 1859 | Turkiye | Diocese of Tokat (Armenian Rite) was established |
| 1861 | Turkiye | Diocese of Melitene (Armenian Rite) was established |
| 1865.05.01 | Turkiye | Diocese of Kharput (Armenian Rite) was established |
| 1867 | Turkiye | Archdiocese of Istanbul (Armenian Rite) was suppressed (to Patriarchal See of Cilicia) |
| 1884 | Turkiye | Diocese of Mush (Armenian Rite) was established |
| 1885 |  Egypt,  South Sudan,  Sudan | Diocese of Iskanderiya (Armenian Rite) was established (became suffragan of Cilicia) |
| 1892.05.30 | Turkiye | Diocese of Sebaste (Armenian Rite) was promoted as Archdiocese of Sebaste (gained territory from the suppressed Diocese of Tokat) |
| 1892.05.30 | Turkiye | Diocese of Tokat (Armenian Rite) was suppressed (to Archdiocese of Sebaste) |
| 1899.02.03 | Syria | Diocese of Aleppo (Armenian Rite) was promoted as Archdiocese of Aleppo |
| 1905 | Turkiye | Titular Metropolitan See of Pessinus (Armenian Rite) was established |
| 1911 |  North Macedonia | Titular Metropolitan See of Achrida (Armenian Rite) was established |
| 1915 | Turkiye | Titular Metropolitan See of Pessinus (Armenian Rite) was suppressed |
| 1920 | Turkiye | Diocese of Prusa (Armenian Rite) was suppressed |
| 1925 | Greece | Titular Metropolitan See of Traianopolis (Armenian Rite) was suppressed |
| 1925.12.21 | Greece | Ordinariate of Greece (Armenian Rite) was established |
| 1926 | Greece | Titular Metropolitan See of Traianopolis in Rhodope (Armenian Rite) was restored |
| 1928 | North Macedonia | Titular Metropolitan See of Achrida (Armenian Rite) was suppressed |
| 1928 | Turkiye | Titular Archiepiscopal See of Tarsus (Armenian Rite) was established |
| 1928.10.15 | Turkiye | Archdiocese of Istanbul (Armenian Rite) was restored (from Patriarchal See of Cilicia and without ecclesiastical province) |
| 1929 | Greece | Titular Metropolitan See of Traianopolis in Rhodope (Armenian Rite) was suppressed |
| 1929.01.25 | Lebanon | Metropolitan Archdiocese of Beirut (Armenian Rite) was established |
| 1930.06.05 |  Romania | Ordinariate of Romania (Armenian Rite) was established |
| 1933 | Turkiye | Titular Episcopal See of Anazarbus (Armenian Rite) was suppressed |
| 1933 | Turkiye | Titular Archiepiscopal See of Nisibis (Armenian Rite) was suppressed |
| 1954.06.29 |  Iraq | Archdiocese of Baghdad (Armenian Rite) was established (from Archdiocese of Mardin and without ecclesiastical province) |
| 1954.06.29 | Syria | Diocese of Kameshli (Armenian Rite) was established (from Archdiocese of Mardin and became suffragan of Cilicia) |
| 1956 | Turkiye | Titular Archiepiscopal See of Chalcedon (Armenian Rite) was suppressed |
| 1957 | Turkiye | Titular Archiepiscopal See of Tarsus (Armenian Rite) was suppressed |
| 1960.07.22 |  France | Apostolic Vicariate of France (Armenian Rite) was established |
| 1972 | Turkiye | Diocese of Adana (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Amida (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Ancyra (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Artvin (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Cesarea in Cappadocia (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Garin (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Kharput (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Marasc (Armenian Rite) was suppressed |
| 1972 | Turkiye | Archdiocese of Mardin (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Melitene (Armenian Rite) was suppressed |
| 1972 | Turkiye | Diocese of Mush (Armenian Rite) was suppressed |
| 1972 | Turkiye | Titular Episcopal See of Prusa (Armenian Rite) was restored |
| 1972 | Turkiye | Archdiocese of Sebaste (Armenian Rite) was suppressed |
| 1972 | Turkiye | Titular Episcopal See of Tokat (Armenian Rite) was restored |
| 1972 | Turkiye | Diocese of Trapezus (Armenian Rite) was suppressed |
| 1981.07.03 |  Brazil,  Mexico,  Uruguay | Apostolic Exarchate of América Latina e México (Armenian Rite) was established |
| 1981.07.03 |  USA,  Canada | Apostolic Exarchate of United States of America and Canada (Armenian Rite) was established |
| 1984.11.06 | Syria | Patriarchal Exarchate of Damascus (Armenian Rite) was established |
| 1986.06.30 | France | Apostolic Vicariate of France (Armenian Rite) was promoted as Diocese of Sainte-Croix-de-Paris (without ecclesiastical province) |
| 1989.02.18 |  Argentina | Diocese of San Gregorio de Narek en Buenos Aires (Armenian Rite) was established (from Apostolic Exarchate of América Latina e México and without ecclesiastical province) |
| 1991.07.13 |  Armenia,  Belarus,  Estonia,  Georgia,  Latvia,  Lithuania,  Russia | Ordinariate of East Europe (Armenian Rite) was established |
| 1991.10.01 |  Jordan,  Israel,  Palestine | Patriarchal Exarchate of Jerusalem (Armenian Rite) was established |
| 1992 | Turkiye | Titular Episcopal See of Mardin (Armenian Rite) was promoted as Titular Archiepiscopal See of Mardin |
| 1998 | Jordan, Israel, Palestine | Patriarchal Exarchate of Jerusalem (Armenian Rite) was demoted as Territory Dependent on the Patriarch of Amman and Jerusalem |
| 2001 | Jordan, Israel, Palestine | Territory Dependent on the Patriarch of Amman and Jerusalem (Armenian Rite) was promoted as Patriarchal Exarchate of Jerusalem and Amman |
| 2005.09.12 | USA, Canada | Apostolic Exarchate of United States of America and Canada (Armenian Rite) was promoted as Diocese of Our Lady of Nareg in New York (without ecclesiastical province) |
| 2014.12.29 | USA, Canada | Diocese of Our Lady of Nareg in New York (Armenian Rite) was renamed as Diocese of Our Lady of Nareg in Glendale |
