| Date | Age | Event | Bishop | Title | Current Title |
| 9 Apr | 25.0 | Ordained Priest | Oleksiy Bazyuk † | Priest of Lviv (Ukrainian), Ukraine | Apostolic Administrator Emeritus of Bosnia-Hercegovina (Ukrainian) |
| 22.7 | Ordained Priest | George Henry Bennett † | Priest of Saint Andrews and Edinburgh, Scotland, Great Britain | Bishop of Aberdeen, Scotland, Great Britain |
| 26.0 | Ordained Priest | Elie Chedid (Scedid) † | Priest | Titular Archbishop of Cyrrhus per i Maroniti |
| 10 Apr | 22.7 | Ordained Priest | Giuseppe Bruno † | Priest of Acqui, Italy | Cardinal, Prefect of the Apostolic Signatura |
| 82.0 | Died | Antonio Centore † | Auxiliary Bishop of Capua, Italy |
| 18.2 | Professed | Pedro Eggerath, O.S.B. † | Member of Order of Saint Benedict | Abbot Emeritus of Nossa Senhora do Monserrate do Rio de Janeiro, Brazil |
| 26.8 | Professed | Joseph (Ignatius) Shanahan, C.S.Sp. † | Member of Congregation of the Holy Spirit | Vicar Apostolic Emeritus of Southern Nigeria {Nigeria Meridionale} |
| 11 Apr | 83.8 | Died | Manuel Antonio Bandini Mazuelos † | Archbishop of Lima, Peru |
| Born | Jerônimo Mazzarotto † | | Auxiliary Bishop Emeritus of Curitiba, Parana, Brazil |
| 12 Apr | 58.2 | Succeeded | Louis-Nazaire Bégin † | Cardinal, Archbishop of Québec, Canada |
| 78.1 | Died | Elzéar-Alexandre Taschereau † | Cardinal, Archbishop of Québec, Canada |
| 15 Apr | 62.3 | Died | José Pereira da Silva Barros † | Archbishop Emeritus of São Sebastião do Rio de Janeiro, Brazil |
| 16 Apr | 23.6 | Ordained Priest | Johannes Hillebrand † | Priest of Paderborn, Germany | Auxiliary Bishop of Paderborn, Germany |
| 17 Apr | 22.4 | Ordained Priest | Christopherus (Edmund) Becker, S.D.S. † | Priest of Society of the Divine Savior | Prefect Emeritus of Assam, India |
| 35.6 | Ordained Bishop | Settimio Caracciolo di Torchiarolo † | Bishop of Alife, Italy | Bishop of Aversa, Italy |
| 18 Apr | 66.0 | Installed | Franz Joseph von Stein † | Archbishop of München und Freising {Munich}, Germany |
| 19 Apr | | Born | James Colbert † | | Vicar Apostolic Emeritus of Port Elizabeth, South Africa |
| 20 Apr | 42.0 | Appointed | Avedis Bédros XIV Arpiarian † | Archbishop (Personal Title), Auxiliary of Cilicia (Armenian), Lebanon | Patriarch |
| 42.0 | Appointed | Avedis Bédros XIV Arpiarian † | Titular Archbishop of Anazarbus degli Armeni | Patriarch of Cilicia (Armenian), Lebanon |
| 21 Apr | 47.6 | Appointed | Juan Nepomuceno Terrero y Escalada † | Auxiliary Bishop of Buenos Aires, Argentina | Bishop of La Plata, Argentina |
| 47.6 | Appointed | Juan Nepomuceno Terrero y Escalada † | Titular Bishop of Dercos (Dercus) | Bishop of La Plata, Argentina |
| 23 Apr | | Born | Justin Abraham Najmy, B.A. † | | Patriarchal Exarch of United States of America (Melkite Greek) |
| 24 Apr | 53.8 | Installed | Mariano Antonio Espinosa † | Bishop of La Plata, Argentina | Archbishop of Buenos Aires, Argentina |
| 25 Apr | | Born | Edward Vincent Dargin † | | Auxiliary Bishop Emeritus of New York, New York, USA |
| 27 Apr | 76.0 | Died | Salvatore Luigi Zola, C.R.L. † | Bishop of Lecce, Italy |
| 28 Apr | | Born | Wilhelm Sedlmeier † | | Auxiliary Bishop Emeritus of Rottenburg, Germany |
| 1 May | 38.3 | Ordained Bishop | Antonios Delenda † | Archbishop of Corfù, Greece | Archbishop of Athēnai {Athens}, Greece |
| Born | Bl. Wladyslaw Goral † | | Auxiliary Bishop of Lublin, Poland |
| 2 May | | Born | John of the Cross Anyogu † | | Bishop of Enugu, Nigeria |
| 74.8 | Died | Flavien-Abel-Antoinin Hugonin † | Bishop of Bayeux (-Lisieux), France |
| 45.7 | Appointed | Ramón Ángel Jara Ruz † | Bishop of San Carlos de Ancud, Chile | Bishop of La Serena, Chile |
| 3 May | 28.6 | Incardinated | Jules-Alexandre Cusin † | Priest of Annecy, France | Bishop of Mende, France |
| 61.8 | Died | Jakub Glazer † | Auxiliary Bishop of Przemyśl, Poland |
| 4 May | 39.3 | Appointed | Pedro Juan Campins y Barceló † | Bishop of Mallorca y Ibiza, Spain |
| 39.4 | Appointed | Jean-Marie Simon, O.S.F.S. † | Vicar Apostolic of Orange River, South Africa |
| 39.4 | Appointed | Jean-Marie Simon, O.S.F.S. † | Titular Bishop of Thaumacus | Vicar Apostolic of Orange River, South Africa |
| 6 May | 55.8 | Appointed | Narcisse Zéphirin Lorrain † | Bishop of Pembroke, Ontario, Canada |
| 7 May | | Born | Sándor Klempa, O. Praem. † | | Apostolic Administrator Emeritus of Veszprém, Hungary |
| 52.5 | Appointed | Jérôme-Josse Van Aertselaer, C.I.C.M. † | Vicar Apostolic of Central Mongolia {Mongolia Centrale}, China | Vicar Apostolic of Tchagar, China |
| 52.5 | Appointed | Jérôme-Josse Van Aertselaer, C.I.C.M. † | Titular Bishop of Zaraï | Vicar Apostolic of Tchagar, China |
| 60.5 | Installed | Santiago de los Santos Garza Zambrano † | Bishop of León, Guanajuato, México | Archbishop of Linares o Nueva León, Nuevo León, México |
| 8 May | 25.8 | Ordained Priest | Emmanuel John Bidwell † | Priest of Westminster, England, Great Britain | Auxiliary Bishop |
| 38.0 | Ordained Bishop | Pedro Adán (Pietro-Adamo) Brioschi, P.I.M.E. † | Bishop of Cartagena, Colombia | Archbishop of Cartagena, Colombia |
| 39.0 | Ordained Bishop | Matteo Angelo Filipello † | Bishop of Ivrea, Italy |
| 56.6 | Ordained Bishop | Matías Linares y Sanzetenea † | Bishop of Salta, Argentina |
| 64.8 | Ordained Bishop | Miguel de los Santos Taborga † | Archbishop of La Plata o Charcas, Bolivia |
| Born | Bl. Alojzije Stepinac † | | Cardinal, Archbishop of Zagreb, Croatia |
| 10 May | 43.5 | Appointed | Laurent Guillon, M.E.P. † | Vicar Apostolic of Southern Manchuria {Manciuria Meridionale}, China |
| Born | Giacomo Violardo † | | Cardinal, Patron of Sovereign Military Hospitaller Order of Saint John of Jerusalem, of Rhodes and of Malta |
| 11 May | 69.9 | Died | Georg Ignaz Komp † | Archbishop of Freiburg im Breisgau, Germany |
| 62.9 | Died | Wilhelm von Reiser † | Bishop of Rottenburg, Germany |
| 12 May | | Born | Martin Dewey McNamara † | | Bishop of Joliet in Illinois, USA |
| 14 May | 63.7 | Died | José María Armas y Rosales † | Bishop of Tulancingo, Hidalgo, México |
| 55.9 | Appointed | John Francis Cunningham † | Bishop of Concordia, Kansas, USA |
| 37.7 | Appointed | Francis Edward Joseph Mostyn † | Bishop of Menevia, Wales, Great Britain | Archbishop of Cardiff, Wales, Great Britain |
| 15 May | 64.4 | Ordained Bishop | Andrea Cassato † | Titular Bishop of Ionopolis | Auxiliary Bishop of Otranto, Italy |
| 24.1 | Ordained Priest | Jean Couzian, I.C.P.B. † | Priest of Institut du Clergé Patriarcal de Bzommar | Bishop of Iskanderiya {Alexandria} (Armenian), Egypt |
| 22.6 | Ordained Priest | Guglielmo Piani, S.D.B. † | Priest of Salesians of Saint John Bosco | Apostolic Delegate to México |
| 16 May | 59.9 | Died | Barnabé Akscheislian † | Bishop of Iskanderiya {Alexandria} (Armenian), Egypt |
| 48.1 | Appointed | Pierre-Marie-François Lalouyer, M.E.P. † | Vicar Apostolic of Northern Manchuria {Manciuria Settentrionale}, China |
| 17 May | 28.5 | Professed | Carmine Cesarano, C.Ss.R. † | Priest of Congregation of the Most Holy Redeemer | Bishop of Aversa, Italy |
| 19 May | 63.7 | Died | Gaetano Blandini † | Bishop of Agrigento (Girgenti), Italy |
| 53.5 | Ordained Bishop | Anđelko Voršak † | Titular Bishop of Zenopolis in Isauria | Auxiliary Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 21 May | 54.3 | Ordained Bishop | Giovanni Carli † | Titular Bishop of Proconnesus | Bishop of Luni, Sarzana e Brugnato, Italy |
| 42.9 | Appointed | Edmundus Sybrandus Luijpen (Luypen), S.J. † | Vicar Apostolic of Batavia, Indonesia |
| 42.9 | Appointed | Edmundus Sybrandus Luijpen (Luypen), S.J. † | Titular Bishop of Oropus | Vicar Apostolic of Batavia, Indonesia |
| 22 May | 59.2 | Ordained Bishop | Ferdinand von Schlör † | Bishop of Würzburg, Germany |
| 28 May | 59.8 | Died | Louis-Jules Baron † | Bishop of Angers, France |
| 42.0 | Installed | Rosendo de la Lastra y Gordillo † | Bishop of Paraná, Argentina |
| Born | Teodosio Moreno Quintana † | | Bishop Emeritus of Huaraz, Peru |
| 29 May | 56.5 | Died | Hugh MacDonald, C.Ss.R. † | Bishop of Aberdeen, Scotland, Great Britain |
| 64.7 | Ordained Bishop | Giuseppe Antonio Ermenegildo Prisco † | Cardinal, Archbishop of Napoli {Naples}, Italy |
| Jun | 78.4 | Died | Lodovico Leonardi † | Bishop of Bertinoro, Italy |
| 4 Jun | 23.2 | Ordained Deacon | Francesco Alessandro Cagliero, I.M.C. † | Deacon of Torino {Turin}, Italy | Prefect of Iringa, Tanzania |
| 30.5 | Ordained Priest | Patrice-Alexandre Chiasson, C.I.M. † | Priest of Congregation of Jesus and Mary | Bishop of Bathurst in Canada, New Brunswick |
| 23.8 | Ordained Deacon | Jean Marie Patrice Flynn † | Deacon of Paris, France | Bishop Emeritus of Nevers, France |
| 25.5 | Ordained Priest | Abdallah Khoury † | Priest | Titular Bishop of Arca in Phoenicia dei Maroniti |
| 25.6 | Ordained Priest | Andrew Killian † | Priest of Wilcannia, Australia | Archbishop of Adelaide, Australia |
| 23.3 | Ordained Priest | John Francis Noll † | Priest of Fort Wayne, Indiana, USA | Bishop |
| 25.2 | Ordained Priest | Thomas Charles O’Reilly † | Priest of Cleveland, Ohio, USA | Bishop of Scranton, Pennsylvania, USA |
| 26.2 | Ordained Priest | Juan Villar y Sanz † | Priest | Bishop of Lérida, Spain |
| 5 Jun | 23.7 | Ordained Priest | Pierre Rossillon, M.S.F.S. † | Priest of Missionaries of St. Francis de Sales d’Annecy | Bishop of Vizagapatnam, India |
| 9 Jun | 74.9 | Died | Cyril Lubowidzki † | Bishop of Lutsk, Zhytomyr, and Kamyanets-Podilskyi (Łuck, Zytomierz, and Kamienec), Ukraine |
| 10 Jun | | Born | Aleksander Moscicki † | | Auxiliary Bishop of Łomża, Poland |
| 12 Jun | 55.6 | Ordained Bishop | Étienne-Joseph-Frédéric Tanoux † | Bishop of Martinique (Fort-de-France e Saint Pierre), Antilles |
| 15 Jun | 54.1 | Selected | Dominikus (Martin Karl) Willi, O. Cist. † | Bishop of Limburg, Germany |
| 17 Jun | | Born | Allen James Babcock † | | Bishop of Grand Rapids, Michigan, USA |
| 19 Jun | 45.8 | Ordained Bishop | Ramón Ángel Jara Ruz † | Bishop of San Carlos de Ancud, Chile | Bishop of La Serena, Chile |
| 23.0 | Ordained Priest | Patrick Lyons † | Priest of Armagh, Ireland | Bishop of Kilmore, Ireland |
| 25.3 | Ordained Priest | Joseph Shiel † | Priest of Melbourne, Australia | Bishop of Rockhampton, Australia |
| Born | James Joseph Sweeney † | | Bishop Emeritus of Honolulu, Hawaii, USA |
| 47.8 | Ordained Bishop | Juan Nepomuceno Terrero y Escalada † | Titular Bishop of Dercos (Dercus) | Bishop of La Plata, Argentina |
| Born | Charles Joseph van Melckebeke, C.I.C.M. † | | Bishop of Yinchuan [Ningsia], China |
| 24 Jun | 26.4 | Ordained Priest | William Barry † | Priest of Sydney, Australia | Archbishop of Hobart, Australia |
| 57.2 | Ordained Bishop | Augustin-Victor Deramecourt † | Bishop of Soissons (-Laon), France |
| 26 Jun | 23.1 | Ordained Priest | Florian-Jean-Baptiste Demange, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Taiku, Korea (South) |
| 23.5 | Ordained Priest | François-Arsène-Jean-Marie-Eugène Lemasle, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Huê, Viet Nam |
| 44.4 | Ordained Bishop | Joseph-Marie Leray, M.S.C. † | Titular Bishop of Remesiana | Vicar Apostolic Emeritus of Gilbert Islands {Isole Gilbert}, Kiribati, Pacific (Oceania) |
| 27 Jun | 60.1 | Died | Vicente Calvo y Valero † | Bishop of Cádiz y Ceuta, Spain |
| 38.9 | Appointed | Paul-Léon Ferrant, C.M. † | Coadjutor Vicar Apostolic of Northern Kiangsi {Kiam-Si Settentrionale}, China | Vicar Apostolic |
| 38.9 | Appointed | Paul-Léon Ferrant, C.M. † | Titular Bishop of Barbalissus | Vicar Apostolic of Northern Kiangsi {Kiam-Si Settentrionale}, China |
| 28 Jun | 29.6 | Ordained Priest | Simon Zhu Kai-min (Chu or Tsu Kai-min), S.J. † | Priest of Society of Jesus | Bishop of Haimen [Haimen], China |
| 37.2 | Appointed | Antoine Coudert, O.M.I. † | Coadjutor Archbishop of Colombo, Sri Lanka | Archbishop |
| 37.2 | Appointed | Antoine Coudert, O.M.I. † | Titular Archbishop of Balanea | Archbishop of Colombo, Sri Lanka |
| 70.2 | Died | Ambroise Emonet, C.S.Sp. † | Superior General of Congregation of the Holy Spirit |
| 58.7 | Appointed | St. Francesco Antonio Domenico Fogolla, O.F.M. † | Coadjutor Vicar Apostolic of Northern Shansi {Scian-Si Settentrionale}, China |
| 58.7 | Appointed | St. Francesco Antonio Domenico Fogolla, O.F.M. † | Titular Bishop of Bagis | Coadjutor Vicar Apostolic of Northern Shansi {Scian-Si Settentrionale}, China |
| 29 Jun | 22.8 | Ordained Priest | Bernardo Bertoglio † | Priest of Vercelli, Italy | Bishop of Bobbio (-Abbey of San Colombano), Italy |
| 57.2 | Ordained Bishop | Marie-Prosper-Adolphe de Bonfils † | Bishop of Le Mans, France |
| 50.0 | Ordained Bishop | Alexander Christie † | Bishop of Vancouver Island, USA | Archbishop of Oregon City, Oregon, USA |
| 22.6 | Ordained Priest | Jean-Marie Jan † | Priest | Bishop Emeritus of Cap-Haïtien, Haïti |
| 59.9 | Ordained Bishop | Amédée-Jean-Baptiste Latieule † | Bishop of Vannes, France |
| 27.7 | Ordained Priest | Edouard Alfred LeBlanc † | Priest | Bishop of Saint John, New Brunswick, Canada |
| 44.4 | Ordained Bishop | François-Alexandre Maillet † | Bishop of Saint-Claude, France |
| 54.4 | Ordained Bishop | Philippe Meunier † | Bishop of Évreux, France |
| Born | Hugh John O’Neill † | | Coadjutor Bishop Emeritus of Dunedin, New Zealand |
| 58.0 | Ordained Bishop | Gustave-Adolphe de Pélacot † | Bishop of Troyes, France | Archbishop of Chambéry, France |