| Date | Age | Event | Bishop | Title | Current Title |
|---|
| 1 Apr | 75.0 | Retired | Alfred Kleinermeilert | Auxiliary Bishop of Trier, Germany | Auxiliary Bishop Emeritus |
| 3 Apr | 65.6 | Appointed | Paul Henry Walsh | Auxiliary Bishop of Rockville Centre, New York, USA |
| 65.6 | Appointed | Paul Henry Walsh | Titular Bishop of Abthugni | Auxiliary Bishop of Rockville Centre, New York, USA |
| 4 Apr | 76.6 | Died | Luís Gonzaga Fernandes † | Bishop Emeritus of Campina Grande, Paraiba, Brazil |
| 53.1 | Appointed | Felix Genn | Bishop of Essen, Germany | Bishop of Münster, Germany |
| 49.4 | Appointed | Christopher Charles Prowse | Auxiliary Bishop of Melbourne, Australia | Bishop of Sale, Australia |
| 49.4 | Appointed | Christopher Charles Prowse | Titular Bishop of Bahanna | Bishop of Sale, Australia |
| 52.4 | Appointed | Antal Spányi | Bishop of Székesfehérvár (Albareale), Hungary |
| 76.2 | Retired | Jusztin Nándor Takács, O.C.D. | Bishop of Székesfehérvár (Albareale), Hungary | Bishop Emeritus |
| 5 Apr | 68.2 | Installed | Antonio Ciliberti | Archbishop of Catanzaro-Squillace, Italy |
| 62.9 | Appointed | Raymond John Lahey | Bishop of Antigonish, Nova Scotia, Canada | Bishop Emeritus |
| 44.8 | Appointed | Hilário da Cruz Massinga, O.F.M. | Bishop of Lichinga, Mozambique | Bishop of Quelimane, Mozambique |
| 49.3 | Ordained Bishop | Pedro Sbalchiero Neto, M.S. † | Coadjutor Bishop of Vacaria, Rio Grande do Sul, Brazil | Bishop |
| 6 Apr | 91.1 | Died | Gerald Emmett Carter † | Cardinal, Archbishop Emeritus of Toronto, Ontario, Canada |
| 50.7 | Ordained Bishop | Jean-Paul André Denis Marcel James | Bishop of Beauvais (-Noyon-Senlis), France | Bishop of Nantes, France |
| 70.7 | Died | Emmanuel Pothanamuzhy, C.M.I. † | Bishop of Mananthavady (Syro-Malabarese), India |
| 56.4 | Installed | Atilano Rodríguez Martínez | Bishop of Ciudad Rodrigo, Spain |
| 7 Apr | 39.3 | Appointed | Vitaliy Skomarovskyi | Auxiliary Bishop of Kyiv-Zhytomyr, Ukraine |
| 39.3 | Appointed | Vitaliy Skomarovskyi | Titular Bishop of Bencenna | Auxiliary Bishop of Kyiv-Zhytomyr, Ukraine |
| 8 Apr | 70.8 | Died | Patrick Fani Chakaipa † | Archbishop of Harare, Zimbabwe |
| 38.3 | Appointed | Wojciech Polak | Auxiliary Bishop of Gniezno, Poland |
| 38.3 | Appointed | Wojciech Polak | Titular Bishop of Mons in Numidia | Auxiliary Bishop of Gniezno, Poland |
| 55.3 | Appointed | Buti Joseph Tlhagale, O.M.I. | Archbishop (Personal Title) of Johannesburg, South Africa | Archbishop of Johannesburg, South Africa |
| 76.5 | Retired | Szczepan Wesoly | Auxiliary Bishop of Gniezno, Poland | Auxiliary Bishop Emeritus |
| 9 Apr | 67.6 | Appointed | Santos Abril y Castelló | Apostolic Nuncio to Slovenia |
| 67.6 | Appointed | Santos Abril y Castelló | Apostolic Nuncio to Bosnia-Herzegovina | Apostolic Nuncio to Slovenia |
| 73.8 | Resigned | Osório Bebber, O.F.M. Cap. | Bishop of Joaçaba, Santa Catarina, Brazil | Bishop Emeritus |
| 59.1 | Appointed | Juliusz Janusz | Apostolic Nuncio to Hungary |
| 65.0 | Succeeded | Walmir Alberto Valle, I.M.C. | Bishop of Joaçaba, Santa Catarina, Brazil |
| 10 Apr | 44.8 | Appointed | Guillermo Patricio Vera Soto | Prelate of Calama, Chile |
| 11 Apr | 61.1 | Appointed | Antonio Marino | Auxiliary Bishop of La Plata, Argentina |
| 61.1 | Appointed | Antonio Marino | Titular Bishop of Basti | Auxiliary Bishop of La Plata, Argentina |
| 80.8 | Died | Joannes Gerardus ter Schure, S.D.B. † | Bishop Emeritus of ’s Hertogenbosch (Bois-le-Duc), Netherlands |
| 12 Apr | 67.6 | Appointed | Santos Abril y Castelló | Apostolic Nuncio to Macedonia | Apostolic Nuncio to Slovenia |
| 39.9 | Appointed | Oscar Domingo Sarlinga | Auxiliary Bishop of Mercedes-Luján, Argentina | Bishop of Zárate-Campana, Argentina |
| 39.9 | Appointed | Oscar Domingo Sarlinga | Titular Bishop of Uzalis | Bishop of Zárate-Campana, Argentina |
| 14 Apr | 45.7 | Appointed | Matthew Kwasi Gyamfi | Bishop of Sunyani, Ghana |
| 15 Apr | 43.8 | Appointed | Thierry Marie Jacques Brac de la Perrière | Auxiliary Bishop of Lyon (-Vienne), France | Auxiliary Bishop of Lyon, France |
| 43.8 | Appointed | Thierry Marie Jacques Brac de la Perrière | Titular Bishop of Zallata | Auxiliary Bishop of Lyon, France |
| 46.1 | Appointed | Hervé Jean Robert Giraud | Auxiliary Bishop of Lyon (-Vienne), France | Bishop of Soissons (, Laon, e Saint-Quentin), France |
| 46.1 | Appointed | Hervé Jean Robert Giraud | Titular Bishop of Silli | Bishop of Soissons (, Laon, e Saint-Quentin), France |
| 55.2 | Appointed | Thomas Anthony Williams | Auxiliary Bishop of Liverpool, England, Great Britain |
| 55.2 | Appointed | Thomas Anthony Williams | Titular Bishop of Mageó | Auxiliary Bishop of Liverpool, England, Great Britain |
| 16 Apr | 59.0 | Succeeded | Arturo Mandin Bastes, S.V.D. | Bishop of Sorsogon, Philippines |
| 76.3 | Retired | Diego Natale Bona | Bishop of Saluzzo, Italy | Bishop Emeritus |
| 61.5 | Appointed | Giuseppe Guerrini | Bishop of Saluzzo, Italy |
| 51.0 | Appointed | Peter Martin Musikuwa | Bishop of Chikwawa, Malawi |
| 44.3 | Appointed | Prudencio Padilla Andaya, Jr., C.I.C.M. | Vicar Apostolic of Tabuk, Philippines |
| 44.3 | Appointed | Prudencio Padilla Andaya, Jr., C.I.C.M. | Titular Bishop of Fuerteventura | Vicar Apostolic of Tabuk, Philippines |
| 80.6 | Died | John Richard Sheets, S.J. † | Auxiliary Bishop Emeritus of Fort Wayne-South Bend, Indiana, USA |
| 56.0 | Appointed | Pawel Stobrawa | Auxiliary Bishop of Opole, Poland |
| 56.0 | Appointed | Pawel Stobrawa | Titular Bishop of Aeca | Auxiliary Bishop of Opole, Poland |
| 75.3 | Retired | Jesus Y. Varela | Bishop of Sorsogon, Philippines | Bishop Emeritus |
| 17 Apr | 50.4 | Appointed | Cyryl Klimowicz | Bishop of San Giuseppe a Irkutsk, Russian Federation |
| 49.7 | Appointed | Jerzy Mazur, S.V.D. | Bishop of Ełk, Poland |
| 49.3 | Installed | Pedro Sbalchiero Neto, M.S. † | Coadjutor Bishop of Vacaria, Rio Grande do Sul, Brazil | Bishop |
| 19 Apr | 88.3 | Died | Alejandro Durán Moreira † | Bishop Emeritus of Rancagua, Chile |
| 90.5 | Died | Aurelio Sabattani † | Cardinal, Prefect Emeritus of the Apostolic Signatura |
| 20 Apr | 81.5 | Died | Henri Lemaître † | Apostolic Nuncio Emeritus to Netherlands |
| 21 Apr | 58.5 | Ordained Bishop | Werner Guballa | Titular Bishop of Catrum | Auxiliary Bishop of Mainz, Germany |
| 45.7 | Ordained Bishop | Ulrich Neymeyr | Titular Bishop of Maraguia | Auxiliary Bishop of Mainz, Germany |
| 22 Apr | 74.9 | Retired | Lorenzo León Alvarado, O. de M. | Bishop of Huacho, Peru | Bishop Emeritus |
| 62.1 | Ordained Bishop | Roger Paul Morin | Titular Bishop of Aulon | Bishop of Biloxi, Mississippi, USA |
| 23 Apr | 80.0 | Retired | Ivan Ljavinec | Bishop of Czech Republic, Faithful of Eastern Rite (Byzantine) | Bishop Emeritus |
| 24 Apr | 75.5 | Died | Renato Hasche Sánchez, S.J. † | Bishop of Arica (San Marcos de), Chile |
| 55.2 | Appointed | Ladislav Hucko | Bishop of Czech Republic, Faithful of Eastern Rite (Byzantine) |
| 55.2 | Appointed | Ladislav Hucko | Titular Bishop of Horaea | Bishop of Czech Republic, Faithful of Eastern Rite (Byzantine) |
| 25 Apr | 89.5 | Died | Luis Alfredo Carvajal Rosales † | Bishop Emeritus of Portoviejo, Ecuador |
| 44.0 | Appointed | Cristián Contreras Villarroel | Auxiliary Bishop of Santiago de Chile |
| 44.0 | Appointed | Cristián Contreras Villarroel | Titular Bishop of Illiberi | Auxiliary Bishop of Santiago de Chile |
| 86.0 | Died | Jacob Bastiampillai Deogupillai † | Bishop Emeritus of Jaffna, Sri Lanka |
| 74.8 | Retired | Jorge García Isaza, C.M. | Vicar Apostolic of Tierradentro, Colombia | Vicar Apostolic Emeritus |
| 81.4 | Died | Otmar Mäder † | Bishop Emeritus of Sankt Gallen, Switzerland |
| 62.3 | Appointed | Dominic Mai Luong | Auxiliary Bishop of Orange in California, USA |
| 62.3 | Appointed | Dominic Mai Luong | Titular Bishop of Cebarades | Auxiliary Bishop of Orange in California, USA |
| 88.5 | Died | André Perraudin, M. Afr. † | Bishop Emeritus of Kabgayi, Rwanda |
| 52.0 | Appointed | Richardo Antonio Tobón Restrepo | Bishop of Sonsón-Rionegro, Colombia |
| 26 Apr | 60.7 | Appointed | Adriano Bernardini | Apostolic Nuncio to Argentina |
| 57.4 | Ordained Bishop | Wieslaw Alojzy Mering | Bishop of Włocławek, Poland |
| 59.6 | Ordained Bishop | Carlos Germán Mesa Ruiz | Bishop of Arauca, Colombia |
| 50.6 | Appointed | Joseph Ngô Quang Kiêt | Apostolic Administrator of Hà Nôi, Viêt Nam | Archbishop |
| 103.3 | Died | José Calasanz Rosenhammer, O.F.M. † | Vicar Apostolic Emeritus of San Ignacio de Velasco, Bolivia |
| 55.0 | Ordained Bishop | Georges M. Saad Abi Younes, O.L.M. | Bishop of Nuestra Señora de los Mártires del Libano en México (Maronite) |
| 46.7 | Ordained Bishop | José Soares Filho, O.F.M. Cap. | Coadjutor Bishop of Carolina, Maranho, Brazil | Bishop |
| 27 Apr | 64.1 | Ordained Bishop | Joseph Louis Jean Boishu | Titular Bishop of Gauriana | Auxiliary Bishop of Reims, France |
| 28 Apr | 54.2 | Installed | Francisco Robles Ortega | Cardinal, Archbishop of Monterrey, Nuevo León, México |
| 29 Apr | 77.2 | Retired | Estanislao Esteban Karlic | Archbishop of Paraná, Argentina | Cardinal, Archbishop Emeritus |
| 68.4 | Appointed | Mario Luis Bautista Maulión | Archbishop of Paraná, Argentina |
| 30 Apr | 64.2 | Appointed | George William Coleman | Bishop of Fall River, Massachusetts, USA |
| 50.9 | Appointed | Enrique Díaz Díaz | Auxiliary Bishop of San Cristóbal de Las Casas, Chiapas, México |
| 50.9 | Appointed | Enrique Díaz Díaz | Titular Bishop of Izirzada | Auxiliary Bishop of San Cristóbal de Las Casas, Chiapas, México |
| 44.3 | Appointed | Marco Eugênio Galrão Leite de Almeida | Bishop of Estância, Sergipe, Brazil |
| 76.9 | Retired | Hildebrando Mendes Costa | Bishop of Estância, Sergipe, Brazil | Bishop Emeritus |
| 43.9 | Appointed | Jeno Schönberger | Bishop of Satu Mare {Szatmár}, Romania |
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