| Date | From | To | ||
|---|---|---|---|---|
| unknown | Mission "Sui Iuris" of Kalumburu, Australia | Suppressed | Diocese of Broome, Australia | Territory Added |
| 25 Jan | Diocese of Cruz del Eje, Argentina (Ischilin, Tulumba, Rio Seco, and Sobremonte) | Territory Lost | Territorial Prelature of Deán Funes, Argentina | Erected |
| 29 Jan | Diocese of Lafayette, Louisiana, USA (Allen, Beauregard, Calcasieu, Cameron, and Jefferson Davis) | Territory Lost | Diocese of Lake Charles, Louisiana, USA | Erected |
| 29 Jan | Diocese of Oppido Mamertina-Palmi, Italy (Covala) | Territory Lost | Archdiocese of Reggio Calabria, Italy | Territory Added |
| 29 Jan | Archdiocese of Cosenza-Bisignano, Italy (San Giacomo) | Territory Lost | Diocese of San Marco Argentano-Scalea, Italy | Territory Added |
| 2 Feb | Archdiocese of Porto Alegre, Rio Grande do Sul, Brazil (Canela, Campo Bom, Dois Irmâos, Estancia Velha, Gramado, Igrejinha, Ivoti, Nova Petrópolis, Nova Hamburg, Rolante, São Leopoldo, Sapiranga, Taquara, and Tres Coroas, along with Santo Antonio) | Territory Lost | Diocese of Novo Hamburgo, Rio Grande do Sul, Brazil | Erected |
| 4 Feb | Territorial Prelature of Ciudad Real, Spain | Elevated | Diocese of Ciudad Real, Spain (and Latin name change) | Elevated |
| 14 Feb | Diocese of Great Falls, Montana, USA | Name Changed | Diocese of Great Falls-Billings, Montana, USA | Name Changed |
| 27 Feb | Opus Spiritus Sancti | Founded | ||
| 3 Mar | Diocese of Cádiz y Ceuta, Spain (La Ina and Torrecera and the southern part of Arcos)
Archdiocese of Sevilla {Seville}, Spain (Alcalá del Valle, Algar, Algodonales, Arcos de la Frontera, Benaocaz, Bornos, El Bosque, Chipiona, Espera, El Gastor, Grazalema, Jerez de la Frontera, Olvera, Prado del Rey, Puerto de Santa María, Puerto Serrano, Rota, Sanlúcar de Barrameda, Setenil, ...) | Territory Lost | Diocese of Jerez de la Frontera, Spain | Erected |
| 6 Mar | Diocese of Auckland, New Zealand (Raglan, Waipa, Otorohanga, Taumarunui, Otinemuri, Piako, Matamata, Tauranga, Rotorua, Taupo, Opotiki, Waiapu, Waikohu, Cook, and part of Waikato) | Territory Lost | Diocese of Hamilton in New Zealand | Erected |
| 6 Mar | Archdiocese of Wellington, New Zealand (Clifton, Stratford, Inglewood, Taranaki, Egmont, Waitame West, Hawera, Eltham, Patea, Waitotara, Waimairino, Wanganui, Rangatikei, Kiwitea, Pohangina, Oroua, Manawatu, Kairanga, Eketahuna, Pohiatua, Woodville, Dannevirke, Waipukurau, Waipawa, ...) | Territory Lost | Diocese of Palmerston North, New Zealand | Erected |
| 6 Mar | Diocese of Patna, India (West Champaran, East Champaram, Gopan Ganj, Siwan, Saran, Vishali, Muzaffarpur, Sitamarhi, Madhubani, Darhanga, Samastipur, Saharsha, and Begusarai) | Territory Lost | Diocese of Muzaffarpur, India | Erected |
| 6 Mar | Vicariate Apostolic of Harar, Ethiopia (Arssi and Bale along with Butejira-Haigotch) | Territory Lost | Prefecture Apostolic of Meki, Ethiopia | Erected |
| 14 Mar | Diocese of Barra do Piraí-Volta Redonda, Rio de Janeiro, Brazil (Angra dos Reis and Parati)
Diocese of Nova Iguaçu, Rio de Janeiro, Brazil (Itaguai and Mangaratiba) | Territory Lost | Diocese of Itaguaí, Rio de Janeiro, Brazil | Erected |
| 27 Mar | Archdiocese of La Plata, Argentina (Chascomús, Coronel Brandsen, Castelli, Dolores, General Belgrano, General Guido, General Paz, Monte, and Pila)
Diocese of Mar del Plata, Argentina (General Conesa, General Lavalle, and Maipú) | Territory Lost | Diocese of Chascomús, Argentina | Erected |
| 28 Mar | Diocese of Kohima-Imphal, India | Split | Diocese of Imphal, India (Manipur)
Diocese of Kohima, India | Split |
| 28 Mar | Apostolic Administration of Zanzibar e Pemba, Tanzania | Elevated | Diocese of Zanzibar, Tanzania | Elevated |
| 18 Apr | Diocese of Assisi, Italy (S. Michele Arcangelo di Limigiano) | Territory Lost | Archdiocese of Spoleto, Italy | Territory Added |
| 23 Apr | Eparchy of Le Caire {Cairo} (Chaldean), Egypt | Erected | ||
| 30 May | Diocese of Leeds, England, Great Britain (South Yorkshire)
Diocese of Nottingham, England, Great Britain (St. Thomas and Our Lady (in Sheffield); Bassetlaw, and Bamford, Chesterfield, Clowne, Dronfield, Eckington, Hathersage, and Staveley) | Territory Lost | Diocese of Hallam, England, Great Britain | Erected |
| 3 Jun | Delegation to Mali | Elevated | Nunciature to Mali | Elevated |
| 7 Jun | Diocese of Bujumbura, Burundi | Territory Lost | Diocese of Bubanza, Burundi | Erected |
| 26 Jun | Nunciature to Zimbabwe | Established | ||
| 28 Jun | Diocese of Concepción (Santissima Concezione) en Paraguay
Vicariate Apostolic of Pilcomayo, Paraguay | Territory Lost | Diocese of Benjamín Aceval, Paraguay | Erected |
| 17 Jul | Diocese of Hajdúdorog (Hungarian), Hungary (Expanded to all in Hungary of the Byzantine Rite) | Territory Added | ||
| 29 Jul | Diocese of Mobile, Alabama, USA | Elevated | Archdiocese of Mobile, Alabama, USA | Elevated |
| 29 Jul | Diocese of Biloxi, Mississippi, USA (from New Orleans) | Metropolitan Changed | ||
| 29 Jul | Diocese of Birmingham, Alabama, USA (from New Orleans) | Metropolitan Changed | ||
| 29 Jul | Diocese of Jackson, Mississippi, USA (from New Orleans) | Metropolitan Changed | ||
| 11 Oct | Diocese of Nova Iguaçu, Rio de Janeiro, Brazil (São João de Meriti)
Diocese of Petrópolis, Rio de Janeiro, Brazil (Duque de Caxias) | Territory Lost | Diocese of Duque de Caxias, Rio de Janeiro, Brazil | Erected |
| 11 Oct | Archdiocese of Paraíba, Brazil (Guarabira, Alagoinha, Araçagi, Arara, Araruna, Bananeiras, Beiern, Borborema, Cacimba de Dentro, Caiçara, Cuitegí, Dona Ines, Duas Estradas, Lagôa de Dentro, Mari, Mulungú, Pilöes, Pilöezinhos, Pirpirituba, Serra da Raiz, Serraría, Solânea, and Tacima) | Territory Lost | Diocese of Guarabira, Paraiba, Brazil | Erected |
| 11 Oct | Territorial Prelature of Tagum, Philippines | Elevated | Diocese of Tagum, Philippines | Elevated |
| 13 Oct | Eparchy of Saints Cyril and Methodius of Toronto (Slovak), Canada | Erected | ||
| 13 Oct | Apostolic Exarchate of Canada (Melkite Greek) | Erected | ||
| 20 Oct | Archdiocese of Brindisi, Italy (no longer a metropolitan) | Elevated | ||
| 20 Oct | Diocese of Lecce, Italy | Elevated | Archdiocese of Lecce, Italy | Elevated |
| 20 Oct | Archdiocese of Otranto, Italy (no longer a metropolitan) | Elevated | ||
| 20 Oct | Diocese of Gallipoli, Italy (from Otranto) | Metropolitan Changed | ||
| 20 Oct | Diocese of Nardò, Italy (from Immediately Subject) | Metropolitan Changed | ||
| 20 Oct | Diocese of Ugento-Santa Maria di Leuca, Italy (from Otranto) | Metropolitan Changed | ||
| 20 Oct | Archdiocese of Trani e Barletta (e Nazareth e Bisceglie), Italy (no longer a metropolitan) | Elevated | ||
| 20 Oct | Diocese of Conversano, Italy (from Bari (-Canosa)) | Metropolitan Changed | ||
| 20 Oct | Diocese of Ruvo e Bitonto, Italy (from Bari (-Canosa)) | Metropolitan Changed | ||
| 20 Oct | Diocese of Andria, Italy (from Trani e Barletta (e Nazareth e Bisceglie)) | Metropolitan Changed | ||
| 20 Oct | Diocese of Gravina, Italy (from Immediately Subject) | Metropolitan Changed | ||
| 20 Oct | Diocese of Molfetta, Giovinazzo e Terlizzi, Italy (from Immediately Subject) | Metropolitan Changed | ||
| 20 Oct | Diocese of Macerata e Tolentino, Italy (from Immediately Subject) | Metropolitan Changed | ||
| 20 Oct | Territorial Prelature of Altamura ed Acquaviva delle Fonti, Italy (from Immediately Subject) | Metropolitan Changed | ||
| 24 Oct | Prefecture Apostolic of Sibolga, Indonesia | Elevated | Diocese of Sibolga, Indonesia | Elevated |
| 30 Oct | Territorial Prelature of Macapá, Amapa, Brazil | Elevated | Diocese of Macapá, Amapa, Brazil | Elevated |
| 30 Oct | Territorial Prelature of Parintins, Amazonas, Brazil | Elevated | Diocese of Parintins, Amazonas, Brazil | Elevated |
| 30 Oct | Territorial Prelature of Rio Negro, Amazonas, Brazil | Elevated | Diocese of Rio Negro, Brazil | Elevated |
| 30 Oct | Territorial Prelature of Tocantinópolis, Tocatins, Brazil | Elevated | Diocese of Tocantinópolis, Tocatins, Brazil | Elevated |
| 22 Nov | Vicariate Apostolic of San Francisco Javier, Peru | Name Changed | Vicariate Apostolic of Jaén en Peru o San Francisco Javier | Name Changed |
| 29 Nov | Diocese of Owerri, Nigeria (Orlu, Oru, Nkwerre Isu, and Ideato along with St. Gregory in Uli) | Territory Lost | Diocese of Orlu, Nigeria | Erected |
| 29 Nov | Diocese of Tororo, Uganda (Soroti and Kumi) | Territory Lost | Diocese of Soroti, Uganda | Erected |
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