 | 1942 | 1943 | 1944 |  |
Date | Country | Change |
| 1943 |  Belarus | Apostolic Exarchate of Belarus (Belarussian Rite) was suppressed |
| 1943 |  Italy | Diocese of Padova lost territory to Diocese of Feltre |
| 1943.01.12 |  Nigeria | Apostolic Vicariate of Northern Nigeria was renamed as Apostolic Vicariate of Asaba-Benin (lost territory to establish Apostolic Vicariate of Ondo-Ilorin) |
| 1943.01.12 | Nigeria | Apostolic Vicariate of Bight of Benin was renamed as Apostolic Vicariate of Lagos (lost territory to establish Apostolic Vicariate of Ondo-Ilorin) |
| 1943.01.12 | Nigeria | Apostolic Vicariate of Ondo-Ilorin was established (from Apostolic Vicariate of Bight of Benin and Apostolic Vicariate of Northern Nigeria) |
| 1943.04.14 |  Tanzania | Apostolic Prefecture of Mbulu was established (from Apostolic Vicariate of Kilima-Njaro, Apostolic Vicariate of Tabora and Apostolic Prefecture of Dodoma) |
| 1943.05.15 |  Peru | Military Vicariate of Peru was established |
| 1943.05.15 |  USA | Diocese of Youngstown was established (from Diocese of Cleveland and became suffragan of Cincinnati) |
| 1943.05.23 | Peru | Diocese of Arequipa was promoted as Metropolitan Archdiocese of Arequipa (with suffragan see Puno) |
| 1943.05.23 | Peru | Diocese of Cusco was promoted as Metropolitan Archdiocese of Cusco (with suffragan see Ayacucho) |
| 1943.05.23 | Peru | Diocese of Trujillo was promoted as Metropolitan Archdiocese of Trujillo (with suffragan sees Cajamarca, Chachapoyas and Piura) |
| 1943.05.26 |  Venezuela | Apostolic Vicariate of Machiques was established (from Diocese of Zulia) |
| 1943.06.18 |  Bolivia | Diocese of La Paz was promoted as Metropolitan Archdiocese of La Paz |
| 1943.12.02 |  Ghana | Apostolic Prefecture of Accra was established (from Apostolic Vicariate of Gold Coast) |
| 1943.12.18 |  El Salvador | Diocese of San Vicente was established (from Metropolitan Archdiocese of San Salvador and became suffragan of San Salvador) |
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