 | 1973 | 1974 | 1975 |  |
Date | Country | Change |
| 1974 |  Italy | Titular Episcopal See of Buxentum was suppressed |
| 1974 | Italy | Titular Episcopal See of Eca was restored |
| 1974 |  Scotland | Titular Episcopal See of Hoddom was established |
| 1974 | Titular Episcopal See of Cululi was suppressed | |
| 1974 | Titular Episcopal See of Mammilla was suppressed | |
| 1974 | Titular Episcopal See of Membrone was suppressed | |
| 1974.01.12 |  Congo-Kinshasa | Diocese of Kabinda lost territory to Diocese of Kamina |
| 1974.01.19 |  Brazil | Diocese of Registro was established (from Diocese of Itapeva and Diocese of Santos and became suffragan of São Paulo) |
| 1974.01.24 |  India | Diocese of Berhampur was established (from Diocese of Cuttack and Diocese of Visakhapatnam and became suffragan of Cuttack–Bhubaneswar) |
| 1974.01.24 | India | Diocese of Cuttack was promoted as Metropolitan Archdiocese of Cuttack–Bhubaneswar (with suffragan sees Berhampur and Sambalpur and lost territory to establish Diocese of Berhampur) |
| 1974.04.14 |  Equatorial Guinea | Diocese of Santa Isabel was renamed as Diocese of Malabo |
| 1974.05.09 |  Gambia | Diocese of Bathurst in Gambia was renamed as Diocese of Banjul |
| 1974.05.14 |  Indonesia | Metropolitan Archdiocese of Endeh was renamed as Metropolitan Archdiocese of Ende |
| 1974.05.14 | Indonesia | Diocese of Manokwari was renamed as Diocese of Manokwari–Sorong |
| 1974.05.27 |  Philippines | Diocese of Daet was established (from Metropolitan Archdiocese of Caceres and became suffragan of Caceres) |
| 1974.05.27 | Philippines | Diocese of Virac was established (from Diocese of Legazpi and became suffragan of Caceres) |
| 1974.05.28 |  USA | Diocese of Arlington was established (from Metropolitan Archdiocese of Washington and Diocese of Richmond and became suffragan of Baltimore) |
| 1974.05.28 | USA | Diocese of Wilmington lost territory to Diocese of Richmond |
| 1974.05.31 |  French Polynesia | Diocese of Taiohae was renamed as Diocese of Taiohae |
| 1974.06.27 |  Canada | Diocese of New Westminster (Ukrainian Rite) was established (from Diocese of Edmonton and became suffragan of Winnipeg) |
| 1974.06.27 | India | Diocese of Palghat (Syro-Malabar Rite) was established (from Diocese of Trichur and became suffragan of Ernakulam) |
| 1974.07.06 |  France | Diocese of Le Havre was established (from Metropolitan Archdiocese of Rouen and became suffragan of Rouen) |
| 1974.08.10 |  Samoa | Diocese of Apia was renamed as Diocese of Apia and Tokelau |
| 1974.08.21 | USA | Diocese of Wheeling was renamed as Diocese of Wheeling–Charleston |
| 1974.09.01 | France | Diocese of Poitiers lost territory to Diocese of Angers |
| 1974.09.21 | Philippines | Diocese of Tuguegarao was promoted as Metropolitan Archdiocese of Tuguegarao (with suffragan sees Ilagan, Batanes and the Babuyan Islands and Bayombong) |
| 1974.10.05 |  Gabon | Diocese of Franceville was established (from Diocese of Mouila and became suffragan of Libreville) |
| 1974.10.18 | Italy | Metropolitan Archdiocese of Udine lost territory to Diocese of Concordia–Pordenone |
| 1974.10.28 | Brazil | Diocese of Alagoinhas was established (from Metropolitan Archdiocese of São Salvador da Bahia and became suffragan of São Salvador da Bahia) |
| 1974.10.28 | Brazil | Diocese of Picos was established (from Diocese of Oeiras and became suffragan of Teresina) |
| 1974.11.12 |  Venezuela | Territorial Prelature of San Fernando de Apure was promoted as Diocese of San Fernando de Apure |
| 1974.11.12 | Venezuela | Diocese of Valencia was promoted as Metropolitan Archdiocese of Valencia (with suffragan sees Maracay and San Carlos de Venezuela) |
| 1974.11.18 |  Saint Lucia | Diocese of Castries was promoted as Metropolitan Archdiocese of Castries (with suffragan sees Roseau, Saint George’s in Grenada and Saint John’s and lost territory to Metropolitan Archdiocese of Port of Spain) |
| 1974.12.05 | Philippines | Diocese of Catarman was established (from Diocese of Borongan and Diocese of Calbayog and became suffragan of Cebu) |
| 1974.12.12 |  South Sudan | Apostolic Vicariate of Juba was promoted as Metropolitan Archdiocese of Juba (with suffragan sees Malakal, Rumbek, Tombura and Wau) |
| 1974.12.12 | South Sudan | Apostolic Prefecture of Malakal was promoted as Diocese of Malakal (became suffragan of Juba) |
| 1974.12.12 | South Sudan | Apostolic Vicariate of Rumbek was promoted as Diocese of Rumbek (became suffragan of Juba) |
| 1974.12.12 | South Sudan | Apostolic Prefecture of Mupoi was promoted as Diocese of Tombura (became suffragan of Juba) |
| 1974.12.12 | South Sudan | Apostolic Vicariate of Wau was promoted as Diocese of Wau (became suffragan of Juba) |
| 1974.12.12 |  Sudan | Apostolic Vicariate of El Obeid was promoted as Diocese of El Obeid (became suffragan of Khartoum) |
| 1974.12.12 | Sudan | Apostolic Vicariate of Khartoum was promoted as Metropolitan Archdiocese of Khartoum (with suffragan see El Obeid) |
| 1974.12.14 |  Colombia | Diocese of Bucaramanga was promoted as Metropolitan Archdiocese of Bucaramanga (with suffragan sees Barrancabermeja and Socorro y San Gil) |
| 1974.12.14 | Colombia | Diocese of Ibagué was promoted as Metropolitan Archdiocese of Ibagué (with suffragan sees Espinal, Garzón and Neiva) |
| 1974.12.19 | Philippines | Diocese of Romblon was established (from Diocese of Capiz and Apostolic Vicariate of Calapan and became suffragan of Jaro) |
© 2026 GCatholic.org
|
