| Year | From | To | ||
|---|---|---|---|---|
| 1566 | Diocese of Thérouanne, France | Name Changed | Diocese of Boulogne (-Sur-Mer), France | Name Changed |
| 1868 | Archdiocese of Cincinnati, Ohio, USA | Territory Lost | Diocese of Columbus, Ohio, USA (Territory from Ohio River to the Scioto River plus the Counties of Franklin, Delaware, and Morrow) | Erected |
| 1868 | Diocese of Milwaukee, Wisconsin, USA | Territory Lost | Diocese of Green Bay, Wisconsin, USA
Diocese of La Crosse, Wisconsin, USA | Erected |
| 1868 | Diocese of Philadelphia, Pennsylvania, USA | Territory Lost | Diocese of Harrisburg, Pennsylvania, USA
Diocese of Scranton, Pennsylvania, USA (Counties of Bradford, Lucerne, Wyoming, Monroe, Pike, Sullivan. Susquehanna, Tioga, Wayne, and Lycoming) | Erected |
| 1868 | Diocese of Buffalo, New York, USA | Territory Lost | Diocese of Rochester, New York, USA (Counties of Monroe, Wayne, Livingston, Tioga, Tompkins, Seneca, Yates, and Ontario) | Erected |
| 1868 | Archdiocese of Baltimore, Maryland, USA (Cecil, Kent, Queen Anne, Talbot, Caroline, Dorchester, Somerset, Wicomico, and Worcester counties in Maryland)
Diocese of Philadelphia, Pennsylvania, USA (Delaware) | Territory Lost | Diocese of Wilmington, Delaware, USA | Erected |
| 1868 | Diocese of Charleston, South Carolina, USA | Territory Lost | Vicariate Apostolic of North Carolina, USA | Erected |
| 1868 | Archdiocese of Oregon City, Oregon, USA | Territory Lost | Vicariate Apostolic of Idaho and Montana, USA (Territory of Montana West of the Rocky Mountains) | Erected |
| 1868 | Archdiocese of Saint Louis, Missouri, USA | Territory Lost | Diocese of Saint Joseph, Missouri, USA (From Charleston River in the East to the Missouri River in the South and West and to the State of Iowa in the North) | Erected |
| 1868 | Diocese of Santa Fe, New Mexico, USA | Territory Lost | Vicariate Apostolic of Arizona, USA
Vicariate Apostolic of Colorado and Utah, USA | Erected |
| 1868 | Vicariate Apostolic of Marysville, USA | Territory Lost | Diocese of Grass Valley, California, USA (Name changed and Vicariate raised to a Diocese) | Erected |
| 1914 | Diocese of Dallas, Texas, USA (El Paso and Gulberson)
Diocese of San Antonio, Texas, USA (St. Anthony (Presidio), Jeff Davis, Reeves, Brewster, Terrell, Pecos, Grane, Ward, Loving, Winkler, Ector, Andrews, and Gaines) Diocese of Tucson, Arizona, USA (Grant, Luna, Doña Ana, Otero, Eddy, and part of Sierra) | Territory Lost | Diocese of El Paso, Texas, USA | Erected |
| 1922 | Vicariate Apostolic of Dar-es-Salaam, Tanzania (Ugogo and Uhehe) | Territory Lost | Prefecture Apostolic of Iringa, Tanzania | Erected |
| 1922 | Diocese of Amazonas, Brazil (S. Rita de Moura) | Territory Lost | Territorial Prelature of Rio Negro, Amazonas, Brazil | Territory Added |
| 1930 | Institute of the Josephites of Belgium | Approbation | ||
| 1931 | Prefecture Apostolic of Salisbury, Zimbabwe | Elevated | Vicariate Apostolic of Salisbury, Zimbabwe | Elevated |
| 1933 | Vicariate Apostolic of Suifu [Yibin], China (Tsin-yen, Jenchow, Penchan, Tsinchen, and Meichow) | Territory Lost | Prefecture Apostolic of Yachow, China | Territory Added |
| 1933 | Prefecture Apostolic of Yachow, China | Elevated | Vicariate Apostolic of Yachow, China | Elevated |
| 1947 | Archdiocese of La Plata, Argentina (Colón, Pergamino, San Nicolás de los Arroyos, Ramallo, Bdrtolomé Miter, San Pedro, Baradero, San Antonio de Areco, Exaltación de la Cruz, General Tlriburu, and Campa)
Diocese of Mercedes, Argentina (Rojas and Marcelino Ugarte) | Territory Lost | Diocese of San Nicolás de los Arroyos, Argentina | Erected |
| 1949 | Vicariate Apostolic of Yaoundé, Cameroon (Suat Nyong and Lom, and Kadei) | Territory Lost | Vicariate Apostolic of Doumé, Cameroon | Erected |
| 1949 | Vicariate Apostolic of Lagos, Nigeria (Northern part (Oyo and Ife Ilesha and Oshogbo)) | Territory Lost | Prefecture Apostolic of Oyo, Nigeria | Erected |
| 1949 | Prefecture Apostolic of Bahr el-Gebel, Sudan (Morii)
Vicariate Apostolic of Bahr el-Ghazal, Sudan (Zande) | Territory Lost | Prefecture Apostolic of Mupoi, Sudan | Erected |
| 1949 | Diocese of Ningbo [Ningpo], China (YungMa, Jüan, Pingyang, Taishun, Yuhwan, and Yiotsing) | Territory Lost | Diocese of Yongjia/Wenzhou [Yungkia, Wenchow], China | Erected |
| 1958 | Diocese of Campanha, Minas Gerais, Brazil (Barranco Alto (in Alfenas)) | Territory Lost | Diocese of Guaxupé, Minas Gerais, Brazil | Territory Added |
| 1979 | Vicariate Apostolic of Sofia e Plovdiv, Bulgaria | Elevated | Diocese of Sofia e Plovdiv, Bulgaria | Elevated |
| 1980 | 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 |
| 1989 | Archdiocese of Milano {Milan}, Italy (Sant'Antonino and San Giacomo Maggiore) | Territory Lost | Diocese of Lodi, Italy | Territory Added |
| 1993 | Territorial Abbey of Saint-Maurice, Switzerland (Saint-Sylvestre de Choex (in Monthey en Valais); Sacré-Cœur (in Lavey-Morcles); Vérossaz; Collonges (Outer-Rhône); Evionnaz; and Aigle-Leysin) | Territory Lost | Diocese of Sion {Sitten}, Switzerland | Territory Added |
| 1993 | Diocese of Sion {Sitten}, Switzerland (Saint-Sigismund (Saint Maurice en Valais) in Saint-Maurice et Méx) | Territory Lost | Territorial Abbey of Saint-Maurice, Switzerland | Territory Added |
| 1995 | Diocese of Kumasi, Ghana (Afígya-Sekyere, Asante-Akim North, Asante-Akim South, Ejisu-Juabeng, Ejura-Sekyedumasi, Kwabre, Sekyere East, and Sekyere West)
Diocese of Sunyani, Ghana (Sene and Atebubu) | Territory Lost | Diocese of Konongo-Mampong, Ghana | Erected |
| 1995 | Diocese of Kumasi, Ghana (Adansi East, Adansi West, Amansie East, Amansie West, and Bosomtwe-Kwanwoma) | Territory Lost | Diocese of Obuasi, Ghana | Erected |
| 1995 | Diocese of Oyo, Nigeria (Osun except for Aiyedade, Aiyedire, Irewole, Iwo, and Ola-Oluwa) | Territory Lost | Diocese of Osogbo, Nigeria | Erected |
| 1999 | Diocese of Santos, Sao Paulo, Brazil (Caraguatatuba, Iíhabela, São Sebastiâo, and Ubatuba) | Territory Lost | Diocese of Caraguatatuba, Sao Paulo, Brazil | Erected |
| 2022 | Eparchy of Saints Cyril and Methodius of Toronto (Slovak), Canada | Elevated | Apostolic Exarchate of Saints Cyril and Methodius of Toronto (Slovak), Canada (from Eparchy to Exarchate) | Elevated |
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