| Date | From | To |
|---|
| 2 Jul | Archdiocese of Acerenza e Matera, Italy
| Split | Archdiocese of Acerenza, Italy
Archdiocese of Matera, Italy
| Split |
| 2 Jul | | | Diocese of Venosa, Italy (from Acerenza e Matera)
| Metropolitan Changed |
| 2 Jul | | | Diocese of Potenza e Marsico Nuovo, Italy (from Salerno (-Acerno))
| Metropolitan Changed |
| 2 Jul | | | Diocese of Muro Lucano, Italy (from Conza e Campagna)
| Metropolitan Changed |
| 2 Jul | | | Diocese of Anglona-Tursi, Italy (from Acerenza e Matera)
| Metropolitan Changed |
| 2 Jul | | | Diocese of Tricarico, Italy (from Acerenza e Matera)
| Metropolitan Changed |
| 4 Jul | Diocese of Ljubljana, Slovenia (Vrbinska vas)
| Territory Lost | Diocese of Lavant, Slovenia
| Territory Added |
| 5 Jul | Prefecture Apostolic of Jabalpur, India
| Elevated | Diocese of Jabalpur, India
| Elevated |
| 5 Jul | Archdiocese of Agra, India (Datia and Gwalior)
Prefecture Apostolic of Jhansi, India
| Elevated | Diocese of Jhansi, India
| Elevated |
| 5 Jul | Vicariate Apostolic of Ghardaïa nel Sahara, Algeria (Sahara (subject to the Spaniards))
Vicariate Apostolic of Marocco o Marruecos, Morocco (Ifni)
| Territory Lost | Prefecture Apostolic of Spanish Sahara and Ifni {Sahara Español e Ifni}, Western Sahara
| Erected |
| 5 Jul | Diocese of Leopoldina, Minas Gerais, Brazil (La Palma)
| Territory Lost | Diocese of Campos, Rio de Janeiro, Brazil
| Territory Added |
| 18 Jul | Archdiocese of São Paulo, Brazil (Santo André, São Bernardo, and São Caetano)
| Territory Lost | Diocese of Santo André, Sao Paulo, Brazil
| Erected |
| 26 Jul | Diocese of Guayaquil, Ecuador (Máchala)
Diocese of Loja, Ecuador (Zaruma and Santa Rosa)
| Territory Lost | Territorial Prelature of El Oro, Ecuador
| Erected |
| 26 Jul | Diocese of Volterra, Italy (Chiusdino, Frassini and Castelletto, Ciciano, Montalcinello, Monticiano, Frosini, S. Galgano, Scalvaia and Luriano, and Tocchi)
| Territory Lost | Archdiocese of Siena, Italy
| Territory Added |
| 30 Jul | Vicariate Apostolic of Caroní, Venezuela (Delta Amacuro)
| Territory Lost | Vicariate Apostolic of Tucupita, Venezuela
| Erected |
| 30 Jul | | | Diocese of Bolivar, Ecuador
Vicariate Apostolic of Caroní, Venezuela
| Territory Added |
| 15 Aug | Archdiocese of Sens (-Auxerre), France (Pontigny)
| Territory Lost | Territorial Prelature of Mission de France o Pontigny, France
| Erected |
| 19 Aug | Diocese of Alajuela, Costa Rica (Aguirre, Osa, Buenos Aires, and Golfito)
Archdiocese of San José de Costa Rica (Tarrazu, Dota, and Perez Zeledón)
| Territory Lost | Diocese of San Isidro de El General, Costa Rica
| Erected |
| 6 Oct | Diocese of Beira, Mozambique (Zambesia)
| Territory Lost | Diocese of Quelimane, Mozambique
| Erected |
| 17 Oct | Archdiocese of Valladolid, Spain (Tarazona de Guareña)
| Territory Lost | Diocese of Salamanca, Spain
| Territory Added |
| 17 Oct | Diocese of Zamora, Spain (14 parishes in Valladolid)
| Territory Lost | Archdiocese of Valladolid, Spain
| Territory Added |
| 17 Oct | Diocese of Zamora, Spain (5 parishes in Salamanca)
| Territory Lost | Diocese of Salamanca, Spain
| Territory Added |
| 17 Oct | Diocese of Palencia, Spain (89 parishes in Valladolid)
| Territory Lost | Archdiocese of Valladolid, Spain
| Territory Added |
| 17 Oct | Diocese of Palencia, Spain (Liebaña in Santander)
| Territory Lost | Diocese of León, Spain
| Territory Added |
| 17 Oct | Diocese of Palencia, Spain (Hinojal de Pisuerga in Burgos)
| Territory Lost | Archdiocese of Burgos, Spain
| Territory Added |
| 17 Oct | Diocese of Sale, Australia (Cañizal and Valcesade Guareña in Zamora)
| Territory Lost | Diocese of Zamora, Spain
| Territory Added |
| 17 Oct | Diocese of Ávila, Spain (23 parishes in Valladolid)
| Territory Lost | Archdiocese of Valladolid, Spain
| Territory Added |
| 17 Oct | Diocese of Segovia, Spain (16 parishes in Valladolid)
| Territory Lost | Archdiocese of Valladolid, Spain
| Territory Added |
| 17 Oct | Diocese of León, Spain (45 parishes in Valladolid)
| Territory Lost | Archdiocese of Valladolid, Spain
| Territory Added |
| 17 Oct | Diocese of León, Spain (18 parishes in Zamora)
| Territory Lost | Diocese of Zamora, Spain
| Territory Added |
| 17 Oct | Diocese of León, Spain (157 parishes in Palencia)
| Territory Lost | Diocese of Palencia, Spain
| Territory Added |
| 17 Oct | Diocese of Astorga, Spain (12 parishes in Zamora)
| Territory Lost | Diocese of Zamora, Spain
| Territory Added |
| 17 Oct | Diocese of Astorga, Spain (23 parishes in Valladolid)
| Territory Lost | Archdiocese of Valladolid, Spain
| Territory Added |
| 17 Oct | Diocese of Astorga, Spain (3 parishes Castro Caldelas in Orense, San Pedro de Gudiña in Lugo)
| Territory Lost | Diocese of Orense, Spain
| Territory Added |
| 17 Oct | Diocese of Astorga, Spain (10 parishes in Quiroga)
| Territory Lost | Diocese of Lugo, Spain
| Territory Added |
| 17 Oct | Archdiocese of Santiago de Compostela, Spain (Beariz, Girazga, and Lebozán)
| Territory Lost | Diocese of Orense, Spain
| Territory Added |
| 17 Oct | Diocese of Tuy, Spain (Ribadavia, 12 parishes, Padrenda and Desteriz (in Orense))
| Territory Lost | Diocese of Orense, Spain
| Territory Added |
| 17 Oct | Diocese of Mondoñedo, Spain (Camarinas, Jomes, and Miño)
| Territory Lost | Archdiocese of Santiago de Compostela, Spain
| Territory Added |
| 17 Oct | Diocese of Mondoñedo, Spain (Mellid with 6 parishes in Lugo)
| Territory Lost | Diocese of Lugo, Spain
| Territory Added |
| 17 Oct | Diocese of Orense, Spain (Bubal with 5 parishes, Torbeo (Lugo))
| Territory Lost | Diocese of Lugo, Spain
| Territory Added |
| 17 Oct | Diocese of Orense, Spain (12 Parishes in Zamora)
| Territory Lost | Diocese of Astorga, Spain
| Territory Added |
| 17 Oct | Diocese of Lugo, Spain (Territory in León)
| Territory Lost | Diocese of León, Spain
| Territory Added |
| 17 Oct | Diocese of Lugo, Spain (Begonte with 4 parishes)
| Territory Lost | Diocese of Mondoñedo, Spain
| Territory Added |
| 17 Oct | Diocese of Lugo, Spain (San Pedro de Espiñeira (in Orense))
| Territory Lost | Diocese of Orense, Spain
| Territory Added |
| 17 Oct | Archdiocese of Burgos, Spain (68 parishes in Palencia)
| Territory Lost | Diocese of Palencia, Spain
| Territory Added |
| 17 Oct | Diocese of Oviedo, Spain (Benavente with 7 parishes)
| Territory Lost | Diocese of Zamora, Spain
| Territory Added |
| 17 Oct | Diocese of Oviedo, Spain (Valencia de don Juan with 6 parishes, 160 parishes, Armellada with 4 parishes (in León))
| Territory Lost | Diocese of León, Spain
| Territory Added |
| 17 Oct | Diocese of Oviedo, Spain (Taramundi, Buron, and Suarna in Lugo)
| Territory Lost | Diocese of Mondoñedo, Spain
| Territory Added |
| 17 Oct | Diocese of Oviedo, Spain (Tresviso with 2 parishes (in Santander))
| Territory Lost | Diocese of Santander, Spain
| Territory Added |
| 27 Oct | Diocese of Oviedo, Spain
| Elevated | Archdiocese of Oviedo, Spain
| Elevated |
| 27 Oct | | | Diocese of Astorga, Spain (from Valladolid)
| Metropolitan Changed |
| 27 Oct | | | Diocese of León, Spain (from Burgos)
| Metropolitan Changed |
| 27 Oct | | | Diocese of Santander, Spain (from Burgos)
| Metropolitan Changed |
| 3 Nov | Archdiocese of Cartagena, Colombia (Brazo de Loba and Simití, San Martín de Loba, Olaya Herrera, Bodega Central, along with parts of: Santa Rosa Sudán, la Rufina, Los Caños de Colorado, and Tiquicio Nuevo except Mompos island)
| Territory Lost | Vicariate Apostolic of San Jorge, Colombia
| Territory Added |
| 11 Nov | Diocese of Saint-Jean-de-Québec, Québec, Canada (Sainte-Hélène Island)
| Territory Lost | Archdiocese of Montréal, Québec, Canada
| Territory Added |
| 12 Nov | Archdiocese of Perth, Australia (Below 32°456 parallel of South Latitude)
| Territory Lost | Diocese of Bunbury, Australia
| Erected |
| 16 Nov | Diocese of Noto, Italy (Contrada S. Giacomo)
| Territory Lost | Archdiocese of Siracusa e Ragusa, Italy
| Territory Added |
| 20 Nov | Archdiocese of Cartagena, Colombia
Vicariate Apostolic of San Jorge, Colombia
| Territory Lost | Diocese of Montería, Colombia (Departamento de Córdoba except San Jorge)
| Erected |
| 20 Nov | | | Sons of Divine Providence
| Approbation |
| 26 Nov | Diocese of Grenoble, France (Villeurbanne: La Nativité, Les Charpennes, Le St. Curé d'Ars, La Sainte Famille de Croix-Luizet, Saint Julien de Çusset, Sainte Thérèse de l'Enfant-Jésus, Saint Fons, Vaulx-en Velin, Vénissieux, Sainte Jeanne d'Arc de Parilly à Vénissieux, Bron, ...)
| Territory Lost | Archdiocese of Lyon (-Vienne), France
| Territory Added |
| 2 Dec | Diocese of San Miguel, El Salvador (Usulután, Sesori, along with Ciudad Barrios, Chapeltique, and Lolotique)
| Territory Lost | Diocese of Santiago de María, El Salvador
| Erected |
| 2 Dec | Prefecture Apostolic of Kuwait
| Elevated | Vicariate Apostolic of Kuwait
| Elevated |
| 20 Dec | Diocese of Caxias do Maranhão, Brazil (Balsas, Alto Parnaíba, Riachâo, Loreto, Benedito Leite, and S. Raimundo das Mangabeiras)
| Territory Lost | Territorial Prelature of Santo Antônio de Balsas, Maranhão, Brazil
| Erected |
| 20 Dec | Diocese of Porto Nacional, Tocatins, Brazil (Tocantinopolis, Itaguatins, Araguatins, Filadelfia, and Babaçulandia)
| Territory Lost | Territorial Prelature of Tocantinópolis, Tocatins, Brazil
| Erected |
| 20 Dec | Vicariate Apostolic of Baudouinville, Congo (Dem. Rep.) (Pweto)
| Territory Lost | Prefecture Apostolic of Lac Moero, Congo (Dem. Rep.)
| Territory Added |
| 28 Dec | Archdiocese of Florianópolis, Santa Catarina, Brazil (Orleäes, Tubarâo, Jmarui, Braco do Norte, Laguna, Urussanga, Criciuma, Jaguaruna, Turro, Araranguá, and Sombrio)
| Territory Lost | Diocese of Tubarão, Santa Catarina, Brazil
| Erected |