| Date | From | To |
|---|
| unknown | | | Order of Imitation of Christ
| Founded |
| unknown | | | Military Ordinariate of Poland, Military
| Erected |
| 1 Jan | Diocese of Seckau, Austria (Fresen)
| Territory Lost | Archdiocese of Salzburg, Austria
| Territory Added |
| 24 Jan | | | Diocese of Crato, Ceara, Brazil (Boundaries Adjusted)
Archdiocese of Fortaleza, Ceara, Brazil (Boundaries Adjusted)
| Territory Added |
| 7 Feb | Diocese of Kielce, Poland (Budnik Maly)
| Territory Lost | Diocese of Włocławek (Kujawy, Kalisze), Poland
| Territory Added |
| 13 Feb | Diocese of Anglona-Tursi, Italy (Castroregio, Farneta, San Costantino Albanese, and San Paolo Albanese)
Diocese of Cassano all’Jonio, Italy (Acqua Formosa, Civita, Firmo, Frascineto, Lungro, Plataci, Porcile, and San Basile)
Archdiocese of Rossano, Italy (San Demetrio Corone, San Giorgio Albanese, Vaccarizzo, and Macchia)
Diocese of San Marco e Bisignano, Italy (San Benedetto Ullano and Santa Sofia dEpiro)
| Territory Lost | Eparchy of Lungro degli Italo-Albanesi (Italo-Albanese), Italy
| Erected |
| 3 Apr | Vicariate Apostolic of Belgian Congo {Congo Belga}, Congo (Dem. Rep.) (Northern region)
| Territory Lost | Vicariate Apostolic of Nouvelle-Anvers, Congo (Dem. Rep.)
| Erected |
| 3 Apr | Vicariate Apostolic of Belgian Congo {Congo Belga}, Congo (Dem. Rep.)
| Name Changed | Vicariate Apostolic of Léopoldville, Congo (Dem. Rep.)
| Name Changed |
| 18 Apr | Diocese of Haileybury, Ontario, Canada
| Territory Lost | Prefecture Apostolic of Northern Ontario (Ontario-Nord), Canada
| Erected |
| 30 Apr | | | Instituto Español de San Francisco Javier para Misiones Extranjeras
| Approbation |
| 20 May | | | Delegation to Australia (Expanded to include Missions in Oceania and Malaysia)
| Territory Added |
| 22 May | Archdiocese of La Plata o Charcas, Bolivia
Diocese of Santa Cruz de la Sierra, Bolivia
| Territory Lost | Vicariate Apostolic of Chaco, Bolivia (Chaco)
| Erected |
| 3 Jun | Archdiocese of Corfù, Greece
Diocese of Cefalonia e Zante, Greece
| United | Archdiocese of Corfù, Zante e Cefalonia, Greece
| United |
| 3 Jun | Diocese of Andros, Greece
Archdiocese of Naxos, Greece
Diocese of Tinos and Mykonos, Greece
| United | Archdiocese of Naxos, Andros, Tinos e Mykonos, Greece
| United |
| 10 Jun | | | Nunciature to Poland
| Established |
| 10 Sep | Vicariate Apostolic of Patna, India
| Elevated | Diocese of Patna, India
| Elevated |
| 4 Oct | Diocese of Amazonas, Brazil (Alto Acre and Alto Purus)
| Territory Lost | Territorial Prelature of Acre e Purus, Brazil
| Erected |
| 19 Nov | Vicariate Apostolic of Batavia, Indonesia (Menado and Célebes along with Onderhoorigheden)
| Territory Lost | Prefecture Apostolic of Célebes, Indonesia
| Erected |
| 26 Nov | | | Delegation to Japan (Japan, Korea, and Formosa Island)
| Established |
| 16 Dec | | | Nunciature to Paraguay (as Internunciature)
| Restored |