| Year | From | To |
|---|
| 1363 | Diocese of Lismore, Ireland
Diocese of Waterford, Ireland
| United | Diocese of Waterford and Lismore, Ireland
| United |
| 1777 | Diocese of Győr (Raab), Hungary
Diocese of Veszprém, Hungary
| Territory Lost | Diocese of Székesfehérvár (Albareale), Hungary
| Erected |
| 1877 | Diocese of Montpellier, France
| Name Changed | Diocese of Montpellier (-Lodève-Béziers-Agde-Saint-Pons-de-Thomières), France
| Name Changed |
| 1910 | Vicariate Apostolic of Central Africa {Africa Centrale}, Sudan (Boundaries Adjusted)
| Territory Lost | Prefecture Apostolic of Uélé / Wellé, Congo (Dem. Rep.)
| Territory Added |
| 1911 | Archdiocese of Saint Louis, Missouri, USA
| Territory Lost | Diocese of Saint Joseph, Missouri, USA (Counties of Clark, Adair, Knox, Lewis, Macon, Shelby, Marion, Chariton, Randolph, Monroe, and Ralls)
| Territory Added |
| 1911 | | | Congregation of Missionaries of the Holy Family
| Decretum Laudis |
| 1920 | | | Nunciature to Romania
| Established |
| 1931 | Mission "Sui Iuris" of Sikkim, India
| Elevated | Prefecture Apostolic of Sikkim, India
| Elevated |
| 1931 | Vicariate Apostolic of Chefoo, China (Kaoyuan, Poshing, Kwangyo, Lintze, Poshan, Idushien, Linkiu, Showkwang, Changlo, and Ankiu)
| Territory Lost | Prefecture Apostolic of Yiduxian [Iduhsien], China
| Erected |
| 1954 | | | Ordinariate of France, Faithful of Eastern Rites
| Erected |
| 1964 | Prefecture Apostolic of Fada N’Gourma, Burkina Faso
| Elevated | Diocese of Fada N’Gourma, Burkina Faso
| Elevated |
| 1964 | Prefecture Apostolic of Sokoto, Nigeria
| Elevated | Diocese of Sokoto, Nigeria
| Elevated |
| 1966 | Diocese of Visakhapatnam, India (Part of Koraput District)
| Territory Lost | Diocese of Cuttack, India
| Territory Added |
| 1966 | Diocese of Visakhapatnam, India (Bastar District)
| Territory Lost | Prefecture Apostolic of Raipur, India
| Territory Added |
| 1967 | Diocese of Ikela, Congo (Dem. Rep.)
| Name Changed | Diocese of Bokungu-Ikela, Congo (Dem. Rep.)
| Name Changed |
| 1978 | Diocese of Surigao, Philippines (Surigao del Sur)
| Territory Lost | Diocese of Tandag, Philippines
| Erected |
| 1984 | Archdiocese of Miami, Florida, USA (Palm Beach and Martin)
Diocese of Orlando, Florida, USA (St. Lucie, Okeechobee, and Martin)
| Territory Lost | Diocese of Palm Beach, Florida, USA
| Erected |
| 1984 | Archdiocese of Miami, Florida, USA (Collier, Glades, and Hendry)
Diocese of Orlando, Florida, USA (Highlands)
Diocese of Saint Petersburg, Florida, USA (Charlotte, De Soto, Hardee, Lee, Manatee, and Sarasota)
| Territory Lost | Diocese of Venice, Florida, USA
| Erected |
| 1986 | Diocese of Alexandria-Shreveport, Louisiana, USA
| Split | Diocese of Alexandria, Louisiana, USA
Diocese of Shreveport, Louisiana, USA (Caddo, Bossier, Webster, Claiborne, Lincoln, Union, Morehouse, West Carroll, DeSoto, Bienville, Jackson, Ouachita, Richland, Red River, and Sabine)
| Split |
| 1986 | Diocese of Posadas, Argentina (Eldorado, General Manuel Belgrado, Iguazú, Montecarlo, San Pedro, and Guaraní (except San Vicente and part of El Soberbio))
| Territory Lost | Diocese of Puerto Iguazú, Argentina
| Erected |
| 1995 | | | Nunciature to Andorra
| Established |
| 2010 | Diocese of Floresta, Pernambuco, Brazil (Cabrobó)
Diocese of Petrolina, Pernambuco, Brazil (Salgueiro, Araripina, Bodocó, Cedro, Exu, Granito, Ipubi, Moreilândia, Ouricuri, Parnamirim, Serrita, Terra Nova, Trindade, and Verdejante)
| Territory Lost | Diocese of Salgueiro, Pernambuco, Brazil
| Erected |