| Year | From | To | ||
|---|---|---|---|---|
| 1420 | Diocese of Suelli, Italy | Suppressed | Archdiocese of Cagliari, Italy | Territory Added |
| 1546 | Diocese of México, Federal District | Elevated | Archdiocese of México, Federal District | Elevated |
| 1546 | Diocese of Tlaxcala (Puebla de los Angeles), México (From Seville (Spain) to Mexico (Mexico)) | Metropolitan Changed | ||
| 1546 | Diocese of Santiago de Guatemala (From Seville (Spain) to Mexico (Mexico)) | Metropolitan Changed | ||
| 1546 | Diocese of Antequera, Oaxaca, México (From Seville (Spain) to Mexico (Mexico)) | Metropolitan Changed | ||
| 1546 | Diocese of Michoacán, México (From Seville (Spain) to Mexico (Mexico)) | Metropolitan Changed | ||
| 1546 | Diocese of Chiapas (Ciudad Real de Chiapas), México (From Seville (Spain) to Mexico (Mexico)) | Metropolitan Changed | ||
| 1546 | Diocese of Santo Domingo, Dominican Republic | Elevated | Archdiocese of Santo Domingo, Dominican Republic | Elevated |
| 1546 | Diocese of Puerto Rico (Porto Rico) (From Seville (Spain) to Santo Domngo (Dominican Republic)) | Metropolitan Changed | ||
| 1546 | Diocese of Santiago de Cuba (From Seville (Spain) to Santo Domingo (Dominican Republic)) | Metropolitan Changed | ||
| 1546 | Diocese of Panamá (From Sevilla (Spain) to Lima (Peru)) | Metropolitan Changed | ||
| 1546 | Diocese of Lima, Peru | Elevated | Archdiocese of Lima, Peru | Elevated |
| 1601 | Diocese of Borgo San Donnino, Italy | Erected | ||
| 1875 | Diocese of Boston, Massachusetts, USA | Elevated | Archdiocese of Boston, Massachusetts, USA | Elevated |
| 1875 | Diocese of Milwaukee, Wisconsin, USA | Elevated | Archdiocese of Milwaukee, Wisconsin, USA | Elevated |
| 1875 | Diocese of Chicago, Illinois, USA | Territory Lost | Diocese of Peoria, Illinois, USA (Counties of Mercer, Warren, Henderson, Hancock, McDonough, Schuyler, Knox, Fulton, Mason, Tazewell, Peoria, Stark, Marshall, Woodford, McLean, Logan, Dewitt, Livingston, Ford, Piatt, Champaign, Vermillion, and Iroquoise) | Erected |
| 1875 | Diocese of Philadelphia, Pennsylvania, USA | Elevated | Archdiocese of Philadelphia, Pennsylvania, USA | Elevated |
| 1875 | Diocese of Santa Fe, New Mexico, USA | Elevated | Archdiocese of Santa Fe, New Mexico, USA | Elevated |
| 1875 | Diocese of Green Bay, Wisconsin, USA (from Saint Louis to Milwaukee)
Diocese of La Crosse, Wisconsin, USA (from Saint Louis to Milwaukee) Diocese of Sault Sainte Marie and Marquette, Michigan, USA (from Saint Louis to Milwaukee) Diocese of Saint Paul, Minnesota, USA (from Saint Louis to Milwaukee) | Metropolitan Changed | ||
| 1875 | Diocese of Saint Paul, Minnesota, USA | Territory Lost | Vicariate Apostolic of Northern Minnesota, USA (Northern part of Minnesota and part of Dakota) | Erected |
| 1875 | Diocese of Burlington, Vermont, USA (from New York to Boston)
Diocese of Hartford, Connecticut, USA (from New York to Boston) Diocese of Portland, Maine, USA (from New York to Boston) Diocese of Providence, Rhode Island, USA (from New York to Boston) Diocese of Springfield in Massachusetts, USA (from New York to Boston) | Metropolitan Changed | ||
| 1875 | Diocese of Erie, Pennsylvania, USA (from Baltimore to Philadelphia)
Diocese of Harrisburg, Pennsylvania, USA (from Baltimore to Philadelphia) Diocese of Pittsburgh, Pennsylvania, USA (from Baltimore to Philadelphia) Diocese of Scranton, Pennsylvania, USA (from Baltimore to Philadelphia) | Metropolitan Changed | ||
| 1875 | Vicariate Apostolic of Arizona, USA (from Saint Louis to Santa Fe)
Vicariate Apostolic of Colorado, USA (from Saint Louis to Santa Fe) | Metropolitan Changed | ||
| 1897 | Vicariate Apostolic of Nyassa, Malawi (to Vicariate Apostolic) | Elevated | ||
| 1915 | Diocese of Bisarchio o Bisarcio (Ozieri), Italy | Name Changed | Diocese of Ozieri, Italy | Name Changed |
| 1915 | Diocese of Hakodate, Japan (Hokkaido (Yesso) except Oshima, Sakhalin (part in Japan), and Kuriles) | Territory Lost | Prefecture Apostolic of Sapporo, Japan | Erected |
| 1925 | Vicariate Apostolic of Chaco, Bolivia (South of the twenty-second parallel) | Territory Lost | Prefecture Apostolic of Pilcomayo, Paraguay | Erected |
| 1930 | Diocese of Rockhampton, Australia (From Townsville on the Coast, to the Whitsunday and Burdekin regions in the South and North to Ingham and Halifax, south-west to Winton, and west to the border with the Northern Territory, with Mount Isa and several western towns and east to Palm Island) | Territory Lost | Diocese of Townsville, Australia | Erected |
| 1948 | Prefecture Apostolic of Cook Islands, Pacific (Oceania) | Elevated | Vicariate Apostolic of Cook Islands, Pacific (Oceania) | Elevated |
| 1948 | Vicariate Apostolic of Kroonstad, South Africa (Bethlehem, Harrismith, Vrede, Frankfort, Reitz, Lindley, Senekal, Fouriesburg, Ficksburg, Clocolan, and part of Ladybrand) | Territory Lost | Vicariate Apostolic of Bethlehem, South Africa | Erected |
| 1948 | Prefecture Apostolic of Ipamu, Congo (Dem. Rep.) | Elevated | Vicariate Apostolic of Ipamu, Congo (Dem. Rep.) | Elevated |
| 1948 | Vicariate Apostolic of Onitsha-Owerri, Nigeria | Split | Vicariate Apostolic of Onitsha, Nigeria
Vicariate Apostolic of Owerri, Nigeria (Owerri and Owerri River) | Split |
| 1948 | Vicariate Apostolic of Kroonstad, South Africa (Latin name changed from de Kroonstad) | Name Changed | ||
| 1959 | Prefecture Apostolic of Niamey, Niger (Dori and Fada) | Territory Lost | Prefecture Apostolic of Fada N’Gourma, Burkina Faso | Erected |
| 1965 | Archdiocese of Morelia, Michoacán, México (Villa Escalante or Santa Clara and Villa Madero) | Territory Lost | Diocese of Tacámbaro, Michoacán, México | Territory Added |
| 1973 | Delegation to Jerusalem and Palestine | Established | Nunciature to Cyprus | Established |
| 1987 | Diocese of Menevia, Wales, Great Britain (Counties of Gwynedd, Clwyd, and the District of Montgomery in the County of Powys) | Territory Lost | Diocese of Wrexham, Wales, Great Britain | Erected |
| 1996 | Diocese of Humaitá, Amazonas, Brazil (Manicoré) | Territory Lost | Territorial Prelature of Borba, Amazonas, Brazil | Territory Added |
| 1996 | Territorial Prelature of Borba, Amazonas, Brazil (Apui) | Territory Lost | Diocese of Humaitá, Amazonas, Brazil | Territory Added |
| 1996 | Diocese of Guiratinga, Mato Grosso, Brazil (Pontal do Araguaia)
Territorial Prelature of São Félix, Mato Grosso, Brazil (Canarana) | Territory Lost | Diocese of Barra do Garças, Mato Grosso, Brazil | Territory Added |
| 1996 | Diocese of Barra do Garças, Mato Grosso, Brazil (Cocalinho north of Manacuru dos Antigos river) | Territory Lost | Territorial Prelature of São Félix, Mato Grosso, Brazil | Territory Added |
| 2023 | Archdiocese of Onitsha, Nigeria (Local Government Areas: Anambra West & East, Oyi, and Ayamelum) | Territory Lost | Diocese of Aguleri, Nigeria | Erected |
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