| Date | From | To | ||
|---|---|---|---|---|
| unknown | Delegation to Persia | Name Changed | Delegation to Iran | Name Changed |
| 8 Jan | Prefecture Apostolic of Basankusu, Congo (Dem. Rep.) | Elevated | Vicariate Apostolic of Basankusu, Congo (Dem. Rep.) | Elevated |
| 8 Jan | Prefecture Apostolic of Iringa, Tanzania | Elevated | Vicariate Apostolic of Iringa, Tanzania | Elevated |
| 8 Jan | Diocese of Yinchuan [Ningsia], China (Paotowien) | Territory Lost | Archdiocese of Hohhot [Suiyüan], China | Territory Added |
| 19 Jan | Apostolic Exarchate of Canada (Ukrainian) (Ontario, Quebec, New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland and Labrador) | Territory Lost | Apostolic Exarchate of Eastern Canada (Ukrainian) | Erected |
| 19 Jan | Apostolic Exarchate of Canada (Ukrainian) (Alberta, British Columbia, and Yukon) | Territory Lost | Apostolic Exarchate of Western Canada (Ukrainian) | Erected |
| 19 Jan | Apostolic Exarchate of Canada (Ukrainian) (Manitoba and Saskatchewan) | Name Changed | Apostolic Exarchate of Central Canada (Ukrainian) | Name Changed |
| 31 Jan | Diocese of Marseille, France | Elevated | Archdiocese of Marseille, France | Elevated |
| 5 Feb | Diocese of Goulburn, Australia | Elevated | Archdiocese of Canberra (and Goulburn), Australia | Elevated |
| 11 Feb | Delegation to Palestine, TransJordan, and Cyprus | Established | ||
| 12 Feb | Prefecture Apostolic of Cook Islands, Pacific (Oceania) | Elevated | Vicariate Apostolic of Cook Islands, Pacific (Oceania) | Elevated |
| 12 Feb | Vicariate Apostolic of Kroonstad, South Africa (Bethlehem, Harrismith, Vrede, Frankfort, Reitz, Lindley, Senekal, Fouriesburg, Ficksburg, Clocolan, and part of Ladybrand) | Territory Lost | Vicariate Apostolic of Bethlehem, South Africa | Erected |
| 12 Feb | Prefecture Apostolic of Ipamu, Congo (Dem. Rep.) | Elevated | Vicariate Apostolic of Ipamu, Congo (Dem. Rep.) | Elevated |
| 12 Feb | Vicariate Apostolic of Onitsha-Owerri, Nigeria | Split | Vicariate Apostolic of Onitsha, Nigeria
Vicariate Apostolic of Owerri, Nigeria (Owerri and Owerri River) | Split |
| 12 Feb | Vicariate Apostolic of Kroonstad, South Africa (Latin name changed from de Kroonstad) | Name Changed | ||
| 28 Feb | Archdiocese of Quito, Ecuador (Tunguragua) | Territory Lost | Diocese of Ambato, Ecuador | Erected |
| 1 Mar | Archdiocese of Zadar (Zara), Croatia (became a Metropolitan) | Elevated | ||
| 7 Mar | Diocese of Chachapoyas, Peru (San Martín (Moyobamba, Lamas, Huallaga, Mariscal Cáceres, Rioja, and Tarapoto)) | Territory Lost | Territorial Prelature of Moyobamba, Peru | Erected |
| 11 Mar | Diocese of Concepción y Chaco, Paraguay (Northern region) | Territory Lost | Vicariate Apostolic of Chaco Paraguayo, Paraguay | Erected |
| 11 Mar | Vicariate Apostolic of Pontianak, Indonesia (Liutang) | Territory Lost | Prefecture Apostolic of Sintang, Indonesia | Erected |
| 9 Apr | Vicariate Apostolic of Transvaal, South Africa | Name Changed | Vicariate Apostolic of Johannesburg, South Africa | Name Changed |
| 9 Apr | Vicariate Apostolic of Kimberley in South Africa {nell’Africa Meridionale} (Rustemburg and Marico)
Vicariate Apostolic of Transvaal, South Africa (Pretoria and Erits) | Territory Lost | Vicariate Apostolic of Pretoria, South Africa | Erected |
| 9 Apr | Prefecture Apostolic of Queenstown, South Africa | Elevated | Vicariate Apostolic of Queenstown, South Africa | Elevated |
| 9 Apr | Diocese of Oradea Mare {Gran Varadino, Nagyvárad}, Romania
Diocese of Satu Mare {Szatmár}, Romania | United | Diocese of Oradea Mare {Gran Varadino, Nagyvárad} and Satu Mare {Szatmár}, Romania | United |
| 13 May | Vicariate Apostolic of Dahomey, Benin | Name Changed | Vicariate Apostolic of Ouidah, Benin | Name Changed |
| 13 May | Prefecture Apostolic of Lishui [Lishui], China | Elevated | Diocese of Lishui [Lishui], China | Elevated |
| 13 May | Prefecture Apostolic of Makassar, Indonesia | Elevated | Vicariate Apostolic of Makassar, Indonesia | Elevated |
| 13 May | Prefecture Apostolic of Niamey, Niger (Kandi, Paralcon, Djougou, and Natitingou) | Territory Lost | Prefecture Apostolic of Parakou, Benin | Erected |
| 19 May | Territorial Prelature of Rio Branco, Brazil | Territory Lost | Territorial Abbey of Nossa Senhora do Monserrate do Rio de Janeiro, Rio de Janeiro, Brazil | Erected |
| 20 May | Archdiocese of Bombay, India (Sind and Baluchistan) | Territory Lost | Diocese of Karachi, Pakistan | Erected |
| 22 May | Suburbicarian See of Ostia, Italy (Boundaries adjusted)
Diocese of Roma {Rome}, Italy (Boundaries adjusted) | Territory Added | ||
| 10 Jun | Prefecture Apostolic of Ghardaïa nel Sahara, Algeria | Elevated | Vicariate Apostolic of Ghardaïa nel Sahara, Algeria | Elevated |
| 10 Jun | Prefecture Apostolic of Mountain Provinces (Montanosa), Philippines | Elevated | Vicariate Apostolic of Mountain Provinces (Montagnosa), Philippines | Elevated |
| 10 Jun | Vicariate Apostolic of Upper Nile {Nilo Superiore}, Uganda (Busoga and part of Mengo) | Territory Lost | Vicariate Apostolic of Kampala, Uganda | Erected |
| 12 Jun | Delegation to East Indies | Elevated | Nunciature to India (to Internunciature) | Elevated |
| 17 Jun | Vicariate Apostolic of Guam, Pacific (Oceania) (Wake Island) | Territory Added | ||
| 8 Jul | Vicariate Apostolic of Lulua e Katanga Centrale, Congo (Dem. Rep.) | Territory Lost | Prefecture Apostolic of Lac Moero, Congo (Dem. Rep.) | Erected |
| 8 Jul | Vicariate Apostolic of Lulua e Katanga Centrale, Congo (Dem. Rep.) | Name Changed | Vicariate Apostolic of Lulua, Congo (Dem. Rep.) | Name Changed |
| 15 Jul | Diocese of Guayaquil, Ecuador | Territory Lost | Vicariate Apostolic of Los Ríos, Ecuador | Erected |
| 17 Jul | Archdiocese of Edmonton, Alberta, Canada | Territory Lost | Diocese of Saint Paul in Alberta, Canada | Erected |
| 7 Aug | Diocese of Nazaré, Pernambuco, Brazil (Santa Cruz)
Archdiocese of Olinda e Recife, Pernambuco, Brazil (Nossa Senhora das Dores de Garuarú, Nossa Senhora do Rosario de Garuará, São Gaetano, Santo Antonio de Cachoeirinha, Nossa Senhora do Ó Altinho, Santo Antonio de Behedouro, São Joaquim, Nossa Senhora da Gonceção do Bonito, São Felix de Gamocim, São José..) Diocese of Pesqueira, Pernambuco, Brazil (Riacho das Almas) | Territory Lost | Diocese of Caruaru, Pernambuco, Brazil | Erected |
| 15 Aug | Congregation of the Missionaries of Saint Charles Borromeo | Approbation | ||
| 17 Sep | Pontifical Commission for Educational and Religious Films, Roman Curia | Established | ||
| 22 Oct | Delegation to Dakar | Established | ||
| 11 Nov | Vicariate Apostolic of Timor Olandese, Indonesia | Name Changed | Vicariate Apostolic of Atambua, Indonesia | Name Changed |
| 12 Nov | Archdiocese of Gniezno e Poznań, Poland | Split | Archdiocese of Gniezno, Poland
Archdiocese of Poznań, Poland | Split |
| 9 Dec | Vicariate Apostolic of Batavia, Indonesia (Bantang along with Soekaboemi and Tjandoer) | Territory Lost | Prefecture Apostolic of Sukabumi, Indonesia | Erected |
| 9 Dec | Prefecture Apostolic of Oudtshoorn, South Africa | Elevated | Vicariate Apostolic of Oudtshoorn, South Africa | Elevated |
| 9 Dec | Prefecture Apostolic of Tali [Dali], China | Elevated | Diocese of Dali [Tali], China | Elevated |
| 9 Dec | Prefecture Apostolic of Lydenburg, South Africa | Elevated | Vicariate Apostolic of Lydenburg, South Africa | Elevated |
| 11 Dec | Archdiocese of Chicago, Illinois, USA (Du Page, Will, Kankakee, and Grundy)
Diocese of Peoria, Illinois, USA (Ford and the Iroquois) Diocese of Rockford, Illinois, USA (Kendall) | Territory Lost | Diocese of Joliet in Illinois, USA | Erected |
| 11 Dec | Archdiocese of Manila, Philippines (Bataan and Pampanga along with parts of Zambales, Tarla, and Nueva Ecija) | Territory Lost | Diocese of San Fernando, Philippines | Erected |
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