| Date | Age | Event | Bishop | Title | Current Title |
|---|
| Apr | 67.1 | Appointed | Orlando Antonio Corrales García | Apostolic Administrator of Sincelejo, Colombia | Archbishop Emeritus of Santa Fe de Antioquia, Colombia |
| 94.6 | Retired | Thomas Zeng Jing mu, O.P. † | Bishop of Yujiang [Yükiang], China | Bishop Emeritus |
| 1 Apr | 90.4 | Died | Andrew Joseph McDonald † | Bishop Emeritus of Little Rock, Arkansas, USA |
| 2 Apr | 57.0 | Appointed | Franco Coppola | Apostolic Nuncio to Chad | Apostolic Nuncio to Belgium |
| 97.3 | Died | Michael Pearse Lacey † | Auxiliary Bishop Emeritus of Toronto, Ontario, Canada |
| 41.4 | Appointed | Bohdan Manyshyn | Titular Bishop of Lesvi | Auxiliary Bishop of Stryj (Ukrainian), Ukraine |
| 41.4 | Confirmed | Bohdan Manyshyn | Auxiliary Bishop of Stryj (Ukrainian), Ukraine |
| 53.7 | Confirmed | Taras Senkiv, O.M. | Bishop of Stryj (Ukrainian), Ukraine |
| 46.5 | Appointed | Vasyl Volodymyr Tuchapets, O.S.B.M. | Titular Bishop of Centuriones | Archiepiscopal Exarch of Kharkiv (Ukrainian), Ukraine |
| 46.5 | Confirmed | Vasyl Volodymyr Tuchapets, O.S.B.M. | Archiepiscopal Exarch of Kharkiv (Ukrainian), Ukraine |
| 3 Apr | 390.9 | Canonized | St. François-Xavier de Laval de Montmorency † | Bishop Emeritus of Québec, Canada |
| 89.5 | Died | Pedro Fré, C.Ss.R. † | Bishop Emeritus of Barretos, Sao Paulo, Brazil |
| 70.8 | Succeeded | Nicholas Mang Thang | Archbishop of Mandalay, Myanmar | Archbishop Emeritus |
| 76.0 | Retired | Paul Zingtung Grawng † | Archbishop of Mandalay, Myanmar | Archbishop Emeritus |
| 4 Apr | 63.0 | Appointed | Michel Christian Alain Aupetit | Bishop of Nanterre, France | Archbishop Emeritus of Paris, France |
| 54.1 | Appointed | Pierre-Yves Michel | Bishop of Valence (-Die-Saint-Paul-Trois-Châteaux), France | Bishop of Nancy (-Toul), France |
| 48.8 | Appointed | Stefan Oster, S.D.B. | Bishop of Passau, Germany |
| 5 Apr | 68.9 | Ceased | Pio Gonçalo Alves de Sousa | Apostolic Administrator of Porto, Portugal | Auxiliary Bishop Emeritus |
| 49.3 | Appointed | Bruno Ateba Edo, S.A.C. | Bishop of Maroua-Mokolo, Cameroon |
| 64.4 | Resigned | Mansueto Bianchi † | Bishop of Pistoia, Italy | Bishop Emeritus |
| 65.6 | Installed | António Francisco dos Santos † | Bishop of Porto, Portugal |
| 54.9 | Ordained Bishop | Rosario Gisana | Bishop of Piazza Armerina, Italy |
| 77.0 | Retired | Philippe Albert Joseph Stevens, P.F.E. † | Bishop of Maroua-Mokolo, Cameroon | Bishop Emeritus |
| 58.9 | Appointed | Joseph Trân Văn Toàn | Auxiliary Bishop of Long Xuyên, Viet Nam | Bishop |
| 58.9 | Appointed | Joseph Trân Văn Toàn | Titular Bishop of Acalissus | Bishop of Long Xuyên, Viet Nam |
| 6 Apr | 50.3 | Ordained Bishop | Olivier Claude Philippe Marie Leborgne | Bishop of Amiens, France | Bishop of Arras (-Boulogne-Saint-Omer), France |
| 63.9 | Installed | Donal McKeown | Bishop of Derry, Ireland |
| 7 Apr | 43.5 | Ordained Bishop | Mykhaylo Bubniy, C.Ss.R. | Titular Bishop of Thubursicum-Bure | Archiepiscopal Exarch of Odessa (Ukrainian), Ukraine |
| 8 Apr | 75.2 | Retired | Nicola de Angelis, C.F.I.C. † | Bishop of Peterborough, Ontario, Canada | Bishop Emeritus |
| 86.5 | Died | Emmanuel III (Emmanuel-Karim) Delly † | Cardinal, Patriarch Emeritus of Babylon {Babilonia} (Chaldean), Iraq |
| 55.0 | Appointed | Fabio Fabene | Titular Bishop of Aquipendium | Secretary of the Dicastery for the Causes of Saints |
| 57.5 | Appointed | William Terrence McGrattan | Bishop of Peterborough, Ontario, Canada | Bishop of Calgary, Alberta, Canada |
| 9 Apr | 66.9 | Died | Boniface Lele † | Archbishop Emeritus of Mombasa, Kenya |
| 10 Apr | 90.4 | Died | Ján Hirka † | Bishop Emeritus of Prešov (Prjašev, Eperjes) (Slovak), Slovakia | Bishop Emeritus of Prešov (Prjašev) (Slovak), Slovakia |
| 48.2 | Ordained Bishop | Johannes Peng Weizhao | Bishop of Yujiang [Yükiang], China | Auxiliary Bishop of Nanchang [Nanchang], China |
| 65.8 | Ordained Bishop | Edward Bernard Scharfenberger | Bishop of Albany, New York, USA |
| 12 Apr | 43.5 | Installed | Mykhaylo Bubniy, C.Ss.R. | Archiepiscopal Exarch of Odessa (Ukrainian), Ukraine |
| 61.0 | Resigned | Marian Buczek | Bishop of Kharkiv-Zaporizhia, Ukraine | Bishop Emeritus |
| 66.5 | Appointed | Giovanni D’Ercole, F.D.P. | Bishop of Ascoli Piceno, Italy | Bishop Emeritus |
| 45.7 | Appointed | Columba Macbeth-Green, O.S.P.P.E. | Bishop of Wilcannia-Forbes, Australia |
| 50.2 | Appointed | Vitaliy Skomarovskyi | Bishop of Lutsk, Ukraine |
| 57.8 | Appointed | Stanislav Szyrokoradiuk, O.F.M. | Bishop of Kharkiv-Zaporizhia, Ukraine | Bishop of Odessa-Simferopol, Ukraine |
| 63.8 | Installed | Orani João Tempesta, O. Cist. | Cardinal-Priest of Santa Maria Madre della Providenza a Monte Verde | Cardinal, Archbishop of São Sebastião do Rio de Janeiro, Brazil |
| 50.1 | Ordained Bishop | Marcony Vinícius Ferreira | Titular Bishop of Vertara | Archbishop of Brazil, Military |
| 13 Apr | 54.9 | Installed | Stefano Manetti | Bishop of Montepulciano-Chiusi-Pienza, Italy | Bishop of Fiesole, Italy |
| 14 Apr | 77.8 | Retired | Thomas McMahon | Bishop of Brentwood, England, Great Britain | Bishop Emeritus |
| 63.0 | Appointed | Alan Stephen Williams, S.M. | Bishop of Brentwood, England, Great Britain |
| 15 Apr | 88.5 | Died | Robert-Casimir Tonyui Messan Dosseh-Anyron † | Archbishop Emeritus of Lomé, Togo |
| 55.9 | Appointed | Francis Aquirinus Kibira | Bishop of Kasese, Uganda |
| 78.6 | Retired | Egidio Nkaijanabwo | Bishop of Kasese, Uganda | Bishop Emeritus |
| 50.2 | Appointed | Peter Kayode Odetoyinbo | Bishop of Abeokuta, Nigeria |
| 97.8 | Died | Anselmo Zarza Bernal † | Bishop Emeritus of León, Guanajuato, México |
| 16 Apr | 61.3 | Appointed | João Bosco Barbosa de Sousa, O.F.M. | Bishop of Osasco, Sao Paulo, Brazil |
| 75.0 | Retired | Stefan Cichy | Bishop of Legnica, Poland | Bishop Emeritus |
| 60.6 | Appointed | Kazimierz Gurda | Bishop of Siedlce, Poland |
| 67.7 | Appointed | Zbigniew Kiernikowski | Bishop of Legnica, Poland | Bishop Emeritus |
| 67.9 | Appointed | Giuseppe Piemontese, O.F.M. Conv. | Bishop of Terni-Narni-Amelia, Italy | Bishop Emeritus |
| 76.0 | Retired | Ercílio Turco † | Bishop of Osasco, Sao Paulo, Brazil | Bishop Emeritus |
| 17 Apr | 49.8 | Appointed | José Trinidad Fernández Angulo | Auxiliary Bishop of Caracas, Santiago de Venezuela | Bishop of Trujillo, Venezuela |
| 49.8 | Appointed | José Trinidad Fernández Angulo | Titular Bishop of Pumentum | Bishop of Trujillo, Venezuela |
| 53.0 | Appointed | Francisco José Villas-Boas Senra de Faria Coelho | Auxiliary Bishop of Braga, Portugal | Archbishop of Évora, Portugal |
| 53.0 | Appointed | Francisco José Villas-Boas Senra de Faria Coelho | Titular Bishop of Plestia | Archbishop of Évora, Portugal |
| 60.2 | Appointed | José Augusto Traquina Maria | Auxiliary Bishop of Lisboa {Lisbon}, Portugal | Bishop of Santarém, Portugal |
| 60.2 | Appointed | José Augusto Traquina Maria | Titular Bishop of Lugura | Bishop of Santarém, Portugal |
| 18 Apr | 91.6 | Died | Ramón Malla Call † | Bishop Emeritus of Lleida, Spain |
| 78.2 | Resigned | Beda (Umberto) Paluzzi, O.S.B. † | Abbot of Montevergine, Italy | Abbot Emeritus |
| 21 Apr | 71.5 | Died | Francisco Ovidio Vera Intriago † | Auxiliary Bishop of Portoviejo, Ecuador |
| 52.3 | Ordained Deacon | Octavi Vilà Mayo, O. Cist. | Deacon of Order of Cistercians | Bishop of Girona, Spain |
| 24 Apr | 69.4 | Installed | Paul Bùi Văn Ðọc † | Archbishop of Thành-Phô Hồ Chí Minh (Hôchiminh Ville), Viet Nam |
| 75.1 | Installed | Orlando Beltran Quevedo, O.M.I. | Cardinal-Priest of Santa Maria Regina Mundi a Torre Spaccata | Cardinal, Archbishop Emeritus of Cotabato, Philippines |
| 25 Apr | 80.3 | Died | Boniface Nyema Dalieh † | Bishop Emeritus of Cape Palmas, Liberia |
| 67.9 | Appointed | Anselmo Guido Pecorari | Apostolic Nuncio to Bulgaria | Apostolic Nuncio |
| 76.3 | Retired | Anthony Francis Sharma, S.J. † | Vicar Apostolic of Nepal | Vicar Apostolic Emeritus |
| 50.7 | Appointed | Paul Simick | Vicar Apostolic of Nepal | Bishop of Bagdogra, India |
| 50.7 | Appointed | Paul Simick | Titular Bishop of Maturba | Bishop of Bagdogra, India |
| 26 Apr | 61.2 | Died | José Moreira Bastos Neto † | Bishop of Três Lagoas, Mato Grosso do Sul, Brazil |
| 88.8 | Died | Protacio Guevarra Gungon † | Bishop Emeritus of Antipolo, Philippines |
| 77.8 | Died | Aloísio Roque Oppermann, S.C.I. † | Archbishop Emeritus of Uberaba, Minas Gerais, Brazil |
| 70.4 | Resigned | Sotero Phamo (Thein Myint) | Bishop of Loikaw, Myanmar | Bishop Emeritus |
| 58.7 | Appointed | Stephen Tjephe † | Apostolic Administrator of Loikaw, Myanmar | Bishop |
| 27 Apr | 61.3 | Installed | Antonio Mura | Bishop of Lanusei, Italy | Bishop of Nuoro, Italy |
| 68.3 | Installed | Philippe Nakellentuba Ouédraogo | Cardinal-Priest of Santa Maria Consolatrice al Tiburtino | Cardinal, Archbishop Emeritus of Ouagadougou, Burkina Faso |
| 132.4 | Canonized | St. Angelo Giuseppe Roncalli † | Pope (Roma {Rome}, Italy) |
| 93.9 | Canonized | St. Karol Józef Wojtyła † | Pope (Roma {Rome}, Italy) |
| 28 Apr | 63.7 | Died | Damião António Franklin † | Archbishop of Luanda, Angola |
| 75.0 | Retired | Theotonius Gomes, C.S.C. | Auxiliary Bishop of Dhaka, Bangladesh | Auxiliary Bishop Emeritus |
| 29 Apr | 56.2 | Ordained Bishop | Peter Leslie Smith | Titular Bishop of Tubunae in Mauretania | Auxiliary Bishop of Portland in Oregon, USA |
| 57.5 | Appointed | Joseph Anthony Toal | Bishop of Motherwell, Scotland, Great Britain |
| 30 Apr | 49.0 | Appointed | José Roberto Fortes Palau | Auxiliary Bishop of São Paulo, Brazil | Bishop of Limeira, Sao Paulo, Brazil |
| 49.0 | Appointed | José Roberto Fortes Palau | Titular Bishop of Acufida | Bishop of Limeira, Sao Paulo, Brazil |
| 57.8 | Appointed | Carlos Lema Garcia | Auxiliary Bishop of São Paulo, Brazil |
| 57.8 | Appointed | Carlos Lema Garcia | Titular Bishop of Alava | Auxiliary Bishop of São Paulo, Brazil |