Date | Country | Change |
| 294 |  Lebanon,  Turkey | Diocese of Cilicia (Armenian Rite) was established |
| 1630 |  Ukraine | Archdiocese of Lviv (Armenian Rite) was established |
| 1650 | Turkey | Diocese of Amida (Armenian Rite) was established |
| 1708 | Turkey | Archdiocese of Mardin (Armenian Rite) was established |
| 1710 |  Syria | Diocese of Aleppe (Armenian Rite) was established |
| 1735 | Turkey | Diocese of Ancyra (Armenian Rite) was established |
| 1742.11.26 | Lebanon, Turkey | Diocese of Cilicia (Armenian Rite) was promoted as Patriarchal See of Cilicia |
| 1774 | Turkey | Diocese of Adana (Armenian Rite) was established |
| 1830 | Turkey | Archdiocese of Istanbul (Armenian Rite) was established |
| 1842 | Turkey | Diocese of Marasc (Armenian Rite) was established |
| 1850 | Turkey | Diocese of Artvin (Armenian Rite) was established |
| 1850 | Turkey | Diocese of Cesarea in Cappadocia (Armenian Rite) was established |
| 1850 | Turkey | Diocese of Prusa (Armenian Rite) was established |
| 1850 | Turkey | Diocese of Trapezus (Armenian Rite) was established |
| 1850.04.30 |  Iran | Diocese of Ispahan (Armenian Rite) was established |
| 1850.04.30 | Turkey | Diocese of Ancyra (Armenian Rite) was restored |
| 1850.04.30 | Turkey | Diocese of Garin (Armenian Rite) was established |
| 1858 | Turkey | Archdiocese of Sebaste (Armenian Rite) was established |
| 1861 | Turkey | Diocese of Melitene (Armenian Rite) was established |
| 1865.05.01 | Turkey | Diocese of Kharput (Armenian Rite) was established |
| 1867 | Turkey | Archdiocese of Istanbul (Armenian Rite) was suppressed (to Patriarchal See of Cilicia) |
| 1884 | Turkey | Diocese of Mush (Armenian Rite) was established |
| 1885 |  Egypt | Diocese of Iskanderiya (Armenian Rite) was established (from Apostolic Vicariate of Egypt) |
| 1899.02.03 | Syria | Diocese of Aleppe (Armenian Rite) was promoted as Archdiocese of Aleppe |
| 1925.12.21 |  Greece | Ordinariate of Greece (Armenian Rite) was established |
| 1928.10.15 | Turkey | Archdiocese of Istanbul (Armenian Rite) was restored (from Patriarchal See of Cilicia) |
| 1929.01.25 | Lebanon | Metropolitan Archdiocese of Beirut (Armenian Rite) was established |
| 1930.06.05 |  Romania | Ordinariate of Romania (Armenian Rite) was established |
| 1954.06.29 |  Iraq | Archdiocese of Baghdad (Armenian Rite) was established (from Archdiocese of Mardin) |
| 1954.06.29 | Syria | Diocese of Kamichlié (Armenian Rite) was established (from Archdiocese of Mardin) |
| 1960.07.22 |  France | Apostolic Vicariate of France (Armenian Rite) was established |
| 1972 | Turkey | Diocese of Adana (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Amida (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Ancyra (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Artvin (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Cesarea in Cappadocia (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Garin (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Kharput (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Marasc (Armenian Rite) was suppressed |
| 1972 | Turkey | Archdiocese of Mardin (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Melitene (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Mush (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Prusa (Armenian Rite) was suppressed |
| 1972 | Turkey | Archdiocese of Sebaste (Armenian Rite) was suppressed |
| 1972 | Turkey | Diocese of Trapezus (Armenian Rite) was suppressed |
| 1981.07.03 |  Brazil,  Mexico | Apostolic Exarchate of América Latina e México (Armenian Rite) was established |
| 1981.07.03 |  United States,  Canada | Apostolic Exarchate of United States of America and Canada (Armenian Rite) was established |
| 1983 | Syria | Patriarchal Exarchate of Syria (Armenian Rite) was established |
| 1984.11.06 | Syria | Patriarchal Exarchate of Damas (Armenian Rite) was established |
| 1986.06.30 | France | Apostolic Vicariate of France (Armenian Rite) was promoted as Diocese of Sainte-Croix-de-Paris |
| 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) |
| 1991.07.13 |  Armenia | Ordinariate of East Europe (Armenian Rite) was established |
| 1991.10.01 |  Jordan,  Israel,  Palestine | Patriarchal Exarchate of Jerusalem (Armenian Rite) was established |
| 1992 | Turkey | Titular Episcopal See of Mardin (Armenian Rite) was promoted as Titular Archiepiscopal See of Mardin |
| 1997 | Syria | Patriarchal Exarchate of Syria (Armenian Rite) was suppressed |
| 1998 | Jordan, Israel, Palestine | Patriarchal Exarchate of Jerusalem (Armenian Rite) was demoted as Territory Dependent on the Patriarch of Amman and Jerusalem |
| 2002 | 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 | United States, Canada | Apostolic Exarchate of United States of America and Canada (Armenian Rite) was promoted as Diocese of Our Lady of Nareg in New York |
