 | 1946 | 1947 | 1948 |  |
Date | Country | Change |
| 1947 |  Czechia | Apostolic Administration of Český Těšín was established (from Metropolitan Archdiocese of Wrocław) |
| 1947 |  Italy | Metropolitan Archdiocese of Torino lost territory to Diocese of Gap and Diocese of Saint-Jean-de-Maurienne |
| 1947 | Italy | Diocese of Ventimiglia lost territory to Diocese of Nice |
| 1947 |  Palestine | Titular Episcopal See of Capharnaum was suppressed |
| 1947 |  Poland | Military Vicariate of Poland was suppressed |
| 1947 | Titular Archiepiscopal See of Siraces was suppressed | |
| 1947.01.09 |  Cameroon | Apostolic Prefecture of Garoua was established (from Apostolic Vicariate of Foumban) |
| 1947.01.09 |  Chad | Apostolic Prefecture of Fort-Lamy was established (from Apostolic Vicariate of Foumban, Apostolic Vicariate of Khartoum and Apostolic Prefecture of Berbérati) |
| 1947.01.09 |  China | Apostolic Prefecture of Jingxian 景縣 was promoted as Diocese of Jingxian 景縣 (became suffragan of Beijing 北京) |
| 1947.01.13 |  Japan | Apostolic Administration of Okinawa and the Southern Islands 琉球列島 was established (from Apostolic Prefecture of Kagoshima 鹿児島 and became suffragan of Tokyo 東京) |
| 1947.01.27 |  Chile | Apostolic Vicariate of Magallanes y Islas Malvinas was promoted as Diocese of Punta Arenas |
| 1947.02.22 | Italy | Diocese of Cervia lost territory to Diocese of Comacchio |
| 1947.03.03 |  Argentina | Diocese of San Nicolás de los Arroyos was established (from Metropolitan Archdiocese of La Plata and Diocese of Mercedes and became suffragan of Buenos Aires) |
| 1947.03.13 |  Congo-Kinshasa | Apostolic Prefecture of Tshumbe was promoted as Apostolic Vicariate of Tshumbe |
| 1947.05.08 | China | Apostolic Prefecture of Tingzhou 汀州 was promoted as Diocese of Changting 長汀 (became suffragan of Fuzhou 福州) |
| 1947.05.08 |  Malawi | Apostolic Prefecture of Northern Nyassa was established (from Apostolic Vicariate of Nyassa) |
| 1947.05.10 | Italy | Diocese of Arezzo lost territory to Territorial Abbacy of Monte Oliveto Maggiore |
| 1947.05.10 | Italy | Diocese of Pienza lost territory to Territorial Abbacy of Monte Oliveto Maggiore |
| 1947.05.10 |  USA | Diocese of Kansas City was established (from the suppressed Diocese of Leavenworth and became suffragan of Saint Louis) |
| 1947.05.10 | USA | Diocese of Leavenworth was suppressed (to establish Diocese of Kansas City) |
| 1947.05.25 |  Scotland | Archdiocese of Glasgow was promoted as Metropolitan Archdiocese of Glasgow (with suffragan sees Motherwell and Paisley, lost territory to Diocese of Galloway and lost territory to establish Diocese of Motherwell and Diocese of Paisley) |
| 1947.05.25 | Scotland | Diocese of Motherwell was established (from Archdiocese of Glasgow and became suffragan of Glasgow) |
| 1947.05.25 | Scotland | Diocese of Paisley was established (from Archdiocese of Glasgow and became suffragan of Glasgow) |
| 1947.06.12 |  Burkina Faso | Apostolic Prefecture of Nouna was established (from Apostolic Prefecture of Gao) |
| 1947.06.12 | Burkina Faso | Apostolic Prefecture of Ouahigouya was established (from Apostolic Vicariate of Ouagadougou) |
| 1947.06.12 |  Ghana | Apostolic Prefecture of Accra was promoted as Apostolic Vicariate of Accra |
| 1947.06.12 |  Mali | Apostolic Prefecture of Kayes was established (from Apostolic Vicariate of Bamako) |
| 1947.06.12 | Mali | Apostolic Prefecture of Sikasso was established (from Apostolic Vicariate of Bobo-Dioulasso) |
| 1947.06.12 |  Nigeria | Apostolic Prefecture of Calabar was promoted as Apostolic Vicariate of Calabar |
| 1947.07.09 |  India | Apostolic Prefecture of Gorakhpur lost territory to Diocese of Allahabad |
| 1947.07.10 | China | Apostolic Prefecture of Daming 大名 was promoted as Diocese of Daming 大名 (became suffragan of Beijing 北京) |
| 1947.07.10 |  Gabon | Apostolic Vicariate of Gabon was renamed as Apostolic Vicariate of Libreville |
| 1947.07.10 |  Pakistan | Apostolic Prefecture of Kafiristan e Kashmir was promoted as Diocese of Rawalpindi |
| 1947.08.10 |  Egypt | Diocese of Assiut (Coptic Rite) was established (from Diocese of Luqsor, from the suppressed Titular Episcopal See of Lycopolis and became suffragan of Alexandria) |
| 1947.08.10 | Egypt | Titular Episcopal See of Lycopolis was suppressed (to establish Diocese of Assiut) |
| 1947.11.15 | USA | Diocese of Austin was established (from Metropolitan Archdiocese of San Antonio, Diocese of Dallas and Diocese of Galveston and became suffragan of San Antonio) |
| 1947.11.15 | USA | Metropolitan Archdiocese of Baltimore–Washington was renamed as Metropolitan Archdiocese of Baltimore (lost territory to establish Archdiocese of Washington and gained suffragan see Washington) |
| 1947.11.15 | USA | Archdiocese of Washington was established (from Metropolitan Archdiocese of Baltimore–Washington and became suffragan of Baltimore) |
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