Date | Country | Change |
| Unknown |  Turkiye | Titular Archiepiscopal See of Nisibis (Chaldean Rite) was established |
| 280 |  Iraq | Diocese of Perat-Maishan (Chaldean Rite) was established |
| 300 | Iraq | Archdiocese of Kaškar (Chaldean Rite) was established |
| 300 | Iraq | Diocese of Seleucia–Ctesifonte (Chaldean Rite) was established |
| 400 | Iraq | Diocese of Seleucia–Ctesifonte (Chaldean Rite) was promoted as Metropolitan Archdiocese of Seleucia–Ctesifonte |
| 410 | Iraq | Diocese of Perat-Maishan (Chaldean Rite) was promoted as Metropolitan Archdiocese of Perat-Maishan |
| 500 | Iraq | Archdiocese of Kaškar (Chaldean Rite) was suppressed |
| 800 | Iraq | Metropolitan Archdiocese of Babylon (Chaldean Rite) was established (from the suppressed Metropolitan Archdiocese of Seleucia–Ctesifonte) |
| 800 | Iraq | Metropolitan Archdiocese of Seleucia–Ctesifonte (Chaldean Rite) was suppressed (to establish Metropolitan Archdiocese of Babylon) |
| 1200 | Iraq | Metropolitan Archdiocese of Perat-Maishan (Chaldean Rite) was suppressed |
| 1553 | Turkiye | Diocese of Diarbekir (Chaldean Rite) was established (without ecclesiastical province) |
| 1553 | Turkiye | Diocese of Gazireh (Chaldean Rite) was established |
| 1553 | Turkiye | Diocese of Mardin (Chaldean Rite) was established |
| 1553 | Turkiye | Diocese of Seert (Chaldean Rite) was established |
| 1553.04.20 | Iraq | Metropolitan Archdiocese of Babylon (Chaldean Rite) was promoted as Patriarchal See of Babylon |
| 1553.04.20 | Iraq | Metropolitan Archdiocese of Baghdad (Chaldean Rite) was established |
| 1565.02.23 |  India | Archdiocese of Angamaly (Chaldean Rite) was established |
| 1599.12.20 | India | Archdiocese of Angamaly (Chaldean Rite) was suppressed (to establish Diocese of Angamalé) |
| 1709 |  Iran | Diocese of Salmas (Chaldean Rite) was established |
| 1785 | Iraq | Diocese of Amadiyah (Chaldean Rite) was established (became suffragan of Babylon) |
| 1789 | Iraq | Metropolitan Archdiocese of Kirkuk (Chaldean Rite) was established |
| 1800 | Iraq | Diocese of Mossul (Chaldean Rite) was established (without ecclesiastical province) |
| 1850 | Iraq | Diocese of Aqrā (Chaldean Rite) was established (from Diocese of Amadiyah) |
| 1850 | Iraq | Diocese of Zaku (Chaldean Rite) was established (from Diocese of Amadiyah and Diocese of Gazireh) |
| 1853 | Iran | Metropolitan Archdiocese of Sehna (Chaldean Rite) was established (from Metropolitan Archdiocese of Kirkuk) |
| 1860 | Iraq | Titular Archiepiscopal See of Perat-Maishan (Chaldean Rite) was restored |
| 1890.09.04 | Iran | Metropolitan Archdiocese of Urmyā (Chaldean Rite) was established (with suffragan see Salmas) |
| 1895 | Iraq | Titular Archiepiscopal See of Perat-Maishan (Chaldean Rite) was suppressed |
| 1895.04.23 | Iraq | Diocese of Aqrā (Chaldean Rite) was suppressed (to Diocese of Amadiyah) |
| 1901 |  Syria | Diocese of Syria (Chaldean Rite) was established (without ecclesiastical province) |
| 1908 |  Palestine,  Israel | Patriarchal Vicariate of Jerusalem (Chaldean Rite) was established |
| 1910.02.24 | Iraq | Diocese of Aqrā (Chaldean Rite) was restored (from Diocese of Amadiyah and became suffragan of Babylon) |
| 1915.06 | Turkiye | Diocese of Seert (Chaldean Rite) was suppressed (to Diocese of Diarbekir) |
| 1927 | Turkiye | Titular Archiepiscopal See of Nisibis (Chaldean Rite) was suppressed |
| 1936.08.01 | Turkiye | Diocese of Gazireh (Chaldean Rite) was demoted as Apostolic Administration of Upper Gazireh |
| 1954.01.17 | Iraq | Archdiocese of Bassorah (Chaldean Rite) was restored (from Metropolitan Archdiocese of Baghdad and without ecclesiastical province) |
| 1957.07.03 |  Lebanon | Diocese of Beirut (Chaldean Rite) was established (from the suppressed Apostolic Administration of Upper Gazireh and without ecclesiastical province) |
| 1957.07.03 | Syria | Diocese of Syria (Chaldean Rite) was renamed as Diocese of Aleppo (gained territory from the suppressed Apostolic Administration of Upper Gazireh) |
| 1957.07.03 | Turkiye | Apostolic Administration of Upper Gazireh (Chaldean Rite) was suppressed (to Diocese of Aleppo and Diocese of Diarbekir and to establish Diocese of Beirut) |
| 1960.10.24 | Iraq | Diocese of Alquoch (Chaldean Rite) was established (from Metropolitan Archdiocese of Baghdad and became suffragan of Babylon) |
| 1966.01.03 | Iran | Archdiocese of Ahvaz (Chaldean Rite) was established (from Metropolitan Archdiocese of Sehna and without ecclesiastical province) |
| 1966.01.03 | Turkiye | Diocese of Diarbekir (Chaldean Rite) was promoted as Archdiocese of Diarbekir |
| 1967 | Iraq | Titular Archiepiscopal See of Kaškar (Chaldean Rite) was restored |
| 1967.02.14 | Iraq | Diocese of Mossul (Chaldean Rite) was promoted as Archdiocese of Mossul |
| 1968.03.07 | Iraq | Archdiocese of Erbil (Chaldean Rite) was established (from Metropolitan Archdiocese of Kirkuk and without ecclesiastical province) |
| 1968.03.07 | Iraq | Diocese of Sulaimaniya (Chaldean Rite) was established (became suffragan of Kirkuk) |
| 1970 | Iran | Titular Metropolitan See of Rew-Ardashir (Chaldean Rite) was established |
| 1970 | Turkiye | Titular Archiepiscopal See of Nisibis (Chaldean Rite) was restored |
| 1971.03.16 | Iran | Metropolitan Archdiocese of Sehna (Chaldean Rite) was renamed as Metropolitan Archdiocese of Tehran |
| 1972 | Turkiye | Diocese of Mardin (Chaldean Rite) was suppressed |
| 1972 | Turkiye | Titular Episcopal See of Seert (Chaldean Rite) was restored |
| 1980 | Iraq | Titular Episcopal See of Anbar (Chaldean Rite) was established |
| 1980.04.23 |  Egypt | Diocese of Cairo (Chaldean Rite) was established (without ecclesiastical province) |
| 1982.01.11 |  USA | Apostolic Exarchate of United States of America (Chaldean Rite) was established |
| 1985.08.03 | USA | Apostolic Exarchate of United States of America (Chaldean Rite) was promoted as Diocese of Saint Thomas the Apostle of Detroit (without ecclesiastical province) |
| 1991 | Palestine, Israel | Patriarchal Vicariate of Jerusalem (Chaldean Rite) was promoted as Patriarchal Exarchate of Jerusalem |
| 1997 | Palestine, Israel | Patriarchal Exarchate of Jerusalem (Chaldean Rite) was demoted as Territory Dependent on the Patriarch of Jerusalem |
| 2002.05.21 | USA | Diocese of Saint Peter the Apostle of San Diego (Chaldean Rite) was established (from Diocese of Saint Thomas the Apostle of Detroit and without ecclesiastical province) |
| 2004 |  Jordan | Territory Dependent on the Patriarch of Jordan (Chaldean Rite) was established |
| 2006.10.21 |  Australia,  New Zealand | Diocese of Saint Thomas the Apostle of Sydney (Chaldean Rite) was established (without ecclesiastical province) |
| 2011.06.10 |  Canada | Diocese of Mar Addai of Toronto (Chaldean Rite) was established (without ecclesiastical province) |
| 2013.06.10 | Iraq | Diocese of Amadiyah (Chaldean Rite) was renamed as Diocese of Amadiyah and Zaku (gained territory from the suppressed Diocese of Zaku) |
| 2013.06.10 | Iraq | Diocese of Zaku (Chaldean Rite) was suppressed (to Diocese of Amadiyah and Zaku) |
| 2013.07.11 | Iraq | Metropolitan Archdiocese of Kirkuk (Chaldean Rite) was renamed as Metropolitan Archdiocese of Kirkuk–Sulaimaniya (gained territory from the suppressed Diocese of Sulaimaniya and lost suffragan see Sulaimaniya) |
| 2013.07.11 | Iraq | Diocese of Sulaimaniya (Chaldean Rite) was suppressed (to Metropolitan Archdiocese of Kirkuk–Sulaimaniya) |
| 2018.12.22 | Iraq | Diocese of Aqrā (Chaldean Rite) was suppressed (to Archdiocese of Mossul–Aqrā) |
| 2018.12.22 | Iraq | Archdiocese of Mossul (Chaldean Rite) was renamed as Archdiocese of Mossul–Aqrā (gained territory from the suppressed Diocese of Aqrā) |
| 2020.06.27 | Iraq | Diocese of Amadiyah and Zaku (Chaldean Rite) was renamed as Diocese of Duhok (lost territory to establish Diocese of Zakho) |
| 2020.06.27 | Iraq | Diocese of Zakho (Chaldean Rite) was restored (from Diocese of Amadiyah and Zaku and became suffragan of Babylon) |
| 2022.02.19 | Iraq | Patriarchal See of Babylon (Chaldean Rite) was renamed as Patriarchal See of Baghdad |
