| Date | Age | Event | Bishop | Title | Current Title |
| 1 May | 76.3 | Died | Patrick McGettigan † | Bishop of Raphoe, Ireland |
| 45.4 | Succeeded | Daniel McGettigan † | Bishop of Raphoe, Ireland | Archbishop of Armagh, Ireland |
| 60.0 | Ordained Bishop | Emmanuel-Jules Ravinet † | Bishop of Troyes, France | Bishop Emeritus |
| 4 May | | Born | Silviano Carrillo y Cárdenas † | | Bishop of Sinaloa, México |
| 66.5 | Died | Taddeo Łubieński † | Auxiliary Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 55.8 | Died | Antonio Mussabini † | Archbishop of Izmir (Smirne), Turkey |
| 65.1 | Died | Charles-Thomas Thibault † | Bishop of Montpellier, France |
| 60.4 | Appointed | Gerardus Petrus Wilmer † | Bishop of Haarlem, Netherlands |
| 5 May | 43.5 | Ordained Bishop | Charles-Théodore Baudry † | Bishop of Périgueux (-Sarlat), France |
| 58.0 | Ordained Bishop | Jean-Joseph Christophe † | Bishop of Soissons (-Laon), France |
| 6 May | 74.3 | Died | Jacques-Léonard Pérocheau, M.E.P. † | Vicar Apostolic of Northwestern Szechwan {Se-Ciuen Settentrionale-Occidentale}, China |
| 47.3 | Succeeded | Annet-Théophile Pinchon, M.E.P. † | Vicar Apostolic of Northwestern Szechwan {Se-Ciuen Settentrionale-Occidentale}, China |
| 11 May | | Born | Pasquale Berardi † | | Archbishop Emeritus of Gaeta, Italy |
| 12 May | 42.1 | Installed | James Quinn † | Bishop of Brisbane, Australia |
| 14 May | 43.5 | Installed | Charles-Théodore Baudry † | Bishop of Périgueux (-Sarlat), France |
| 18 May | | Born | Thomas Patrick Gilmartin † | | Archbishop of Tuam, Ireland |
| 21 May | 61.4 | Resigned | Jacques-Marie-Joseph Jeancard † | Auxiliary Bishop of Marseille, France | Auxiliary Bishop Emeritus |
| 78.8 | Died | St. Eugène-Charles-Joseph de Mazenod, O.M.I. † | Bishop of Marseille, France |
| 22 May | 62.3 | Died | Godehard Braun † | Auxiliary Bishop of Trier, Germany |
| 23 May | 33.8 | Ordained Priest | Jean-Baptiste Cazet, S.J. † | Priest of Society of Jesus | Vicar Apostolic Emeritus of Central Madagascar {Madagascar Centrale}, Madagascar |
| 25 May | 23.2 | Ordained Priest | Giulio Boschi † | Priest of Perugia, Italy | Cardinal, Archbishop Emeritus of Ferrara, Italy |
| 24.1 | Ordained Priest | Benedetto Maria della Camera † | Priest | Titular Bishop of Thermopylae |
| 22.8 | Ordained Priest | Federico Foschi † | Priest | Bishop of Cervia, Italy |
| 24.4 | Ordained Priest | Jules Lepley, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic Emeritus of Southern Szechwan {Se-Ciuen Meridionale}, China |
| 23.6 | Ordained Priest | Franz Konstantin Rampa † | Priest of Como, Italy | Bishop of Chur, Switzerland |
| 26.0 | Ordained Priest | Paschal Tosi, S.J. † | Priest of Rimini, Italy | Prefect Emeritus of Alaska, USA |
| 25.5 | Ordained Priest | Henri-Victor Valleau † | Priest of La Rochelle (-Saintes), France | Bishop of Quimper [Cornouailles](-Léon), France |
| 26 May | 48.7 | Ordained Bishop | Antonio da Trindade de Vasconcellos Pereira de Melo † | Bishop of Beja, Portugal | Bishop of Lamego, Portugal |
| 28 May | 30.8 | Installed | Antônio de Macedo Costa † | Bishop of Belém do Pará, Brazil | Archbishop of São Salvador da Bahia, Brazil |
| 1 Jun | 53.1 | Appointed | Andjelik Juraj Bedenik, O.F.M. Cap. † | Vicar Apostolic of Agra, India |
| 2 Jun | 54.2 | Ordained Bishop | Adrian Włodarski † | Titular Bishop of Ibora | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 5 Jun | | Born | Valentín Comellas y Santamaría † | | Bishop of Solsona, Spain |
| 6 Jun | 81.8 | Died | Nicolas-Augustin de la Croix d’Azolette † | Archbishop Emeritus of Auch, France |
| 7 Jun | | Born | Giuseppe Fabbrucci † | | Bishop of Fidenza, Italy |
| Born | Antoni Laubitz † | | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 8 Jun | 55.1 | Selected | Charles-Théodore Colet † | Bishop of Luçon, France | Archbishop of Tours, France |
| Born | Louis-Auguste Dartois, S.M.A. † | | Vicar Apostolic of Dahomey, Benin |
| 53.3 | Selected | Louis-Anne Dubreil † | Bishop of Vannes, France | Archbishop of Avignon (-Apt, Cavaillon, Carpentras, Orange, e Vaison), France |
| 61.4 | Selected | François-Marie-Joseph Lecourtier † | Bishop of Montpellier, France | Archbishop Emeritus |
| 11 Jun | 58.5 | Ordained Bishop | Claude-Marie Magnin † | Bishop of Annecy, France |
| 13 Jun | | Born | Antonio Aurelio Torres y Sanz, O.C.D. † | | Bishop Emeritus of Cienfuegos, Cuba |
| 81.3 | Died | Francesco di Paola Villadecani † | Cardinal, Archbishop of Messina, Italy |
| 14 Jun | 49.7 | Selected | Antolín Monescillo y Viso † | Bishop of Calahorra y La Calzada, Spain | Cardinal, Archbishop of Toledo, Spain |
| 15 Jun | 48.3 | Died | Alexander Smith † | Coadjutor Vicar Apostolic of Western District, Scotland, Great Britain |
| 16 Jun | | Born | Frediano Giannini, O.F.M. † | | Vice-Chamberlain of the Apostolic Chamber |
| 23.3 | Ordained Priest | José María de Jesús Portugal y Serratos, O.F.M. Obs. † | Priest of Order of Observant Friars Minor | Bishop of Aguascalientes, México |
| 21.7 | Professed | Gulstan Francis Ropert, SS.CC. † | Member of Congregation of the Sacred Hearts of Jesus and Mary | Vicar Apostolic of Hawaiian Islands, USA |
| 18 Jun | 53.2 | Appointed | Andjelik Juraj Bedenik, O.F.M. Cap. † | Titular Bishop of Leuce | Vicar Apostolic of Agra, India |
| 46.3 | Appointed | George Butler † | Coadjutor Bishop of Limerick, Ireland | Bishop |
| 46.3 | Appointed | George Butler † | Titular Bishop of Cydonia (Agia, Canea) | Bishop of Limerick, Ireland |
| 20 Jun | 45.8 | Selected | Patrice-François-Marie Cruice † | Bishop of Marseille, France | Bishop Emeritus |
| 21 Jun | | Born | Alexandre Caillot † | | Bishop of Grenoble, France |
| 23 Jun | 23.3 | Ordained Priest | Prosper-Amable Berthet † | Priest of Gap, France | Bishop |
| 27.4 | Ordained Priest | Alexis Riccaz, M.S.F.S. † | Priest of Missionaries of St. Francis de Sales d’Annecy | Bishop of Nagpur, India |
| 60.5 | Ordained Bishop | Gerardus Petrus Wilmer † | Bishop of Haarlem, Netherlands |
| 24 Jun | | Born | Fulgentius Antonio Torres, O.S.B. † | | Abbot of New Norcia, Australia |
| 26 Jun | 54.2 | Installed | Benedetto Riccabona de Reinchenfels † | Bishop of Trento, Italy |
| 28 Jun | | Born | Władysław Paweł Krynicki † | | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 29 Jun | | Born | Nicolas Cadi † | | Archbishop Emeritus of Bosra e Haūrān (Melkite Greek), Syria |
| 23.1 | Ordained Priest | Edward Ilsley † | Priest of Birmingham, England, Great Britain | Archbishop Emeritus of Birmingham, England, Great Britain |
| 50.9 | Ordained Bishop | Walterus Hermanus Jacobus (Walter) Steins Bisschop, S.J. † | Titular Bishop of Nilopolis | Bishop of Auckland, New Zealand |
| 30 Jun | 26.9 | Ordained Priest | James Gibbons † | Priest of Baltimore, Maryland, USA | Cardinal, Archbishop |
| 50.4 | Died | Manuel María Negueruela Mendi † | Archbishop of Santiago de Cuba |
| 48.7 | Selected | José Raimundo Benito Vilamitjana y Vila † | Bishop of Tortosa, Spain | Archbishop of Tarragona, Spain |
| 7 Jul | 49.7 | Installed | Buenaventura Rizo Patrón, O.F.M. Obs. † | Bishop of Salta, Argentina |
| 9 Jul | | Born | James Morrison † | | Bishop of Antigonish, Nova Scotia, Canada |
| 14 Jul | 34.6 | Ordained Priest | Albert-Marie-Camille de Briey † | Priest | Bishop of Saint-Dié, France |
| 51.8 | Ordained Priest | Félix-Joseph-François-Barthélemy de Las Cases † | Priest | Bishop Emeritus of Constantine (-Hippone), Algeria |
| Born | John Henry Tihen † | | Bishop Emeritus of Denver, Colorado, USA |
| 18 Jul | | Born | František Zapletal † | | Auxiliary Bishop of Praha {Prague}, Czechia |
| 19 Jul | 59.2 | Selected | Sebastião Pinto do Rêgo † | Bishop of São Paulo, Brazil |
| 21 Jul | 53.2 | Ordained Bishop | Andjelik Juraj Bedenik, O.F.M. Cap. † | Titular Bishop of Leuce | Vicar Apostolic of Agra, India |
| 22 Jul | 50.5 | Appointed | Tomás Aguirre † | Bishop of Guayaquil, Ecuador |
| 31.9 | Appointed | José Ignacio Checa y Barba † | Auxiliary Bishop of Cuenca, Ecuador | Archbishop of Quito, Ecuador |
| 31.9 | Appointed | José Ignacio Checa y Barba † | Titular Bishop of Lystra | Archbishop of Quito, Ecuador |
| 55.2 | Confirmed | Charles-Théodore Colet † | Bishop of Luçon, France | Archbishop of Tours, France |
| 36.8 | Confirmed | Luiz da Conceição Saraiva, O.S.B. † | Bishop of São Luís do Maranhão, Brazil |
| 35.5 | Appointed | José María Covarrubias y Mejía † | Bishop of Antequera, Oaxaca, México |
| 45.9 | Confirmed | Patrice-François-Marie Cruice † | Bishop of Marseille, France | Bishop Emeritus |
| 34.6 | Appointed | Charles-Amable de la Tour d’Auvergne Lauraguais † | Titular Archbishop of Colossae | Archbishop of Bourges, France |
| 34.6 | Confirmed | Charles-Amable de la Tour d’Auvergne Lauraguais † | Coadjutor Archbishop of Bourges, France | Archbishop |
| 53.5 | Confirmed | Louis-Anne Dubreil † | Bishop of Vannes, France | Archbishop of Avignon (-Apt, Cavaillon, Carpentras, Orange, e Vaison), France |
| 47.0 | Appointed | Remigio Estéves de Toral † | Bishop of Cuenca, Ecuador |
| 57.1 | Confirmed | Francisco Landeira y Sevilla † | Bishop of Cartagena (en España) |
| 61.6 | Confirmed | François-Marie-Joseph Lecourtier † | Bishop of Montpellier, France | Archbishop Emeritus |
| 56.2 | Appointed | Henri Louis Charles Maret † | Titular Bishop of Sura | Titular Archbishop of Naupactus |
| 49.8 | Confirmed | Antolín Monescillo y Viso † | Bishop of Calahorra y La Calzada, Spain | Cardinal, Archbishop of Toledo, Spain |
| 66.6 | Appointed | José María Riofrío y Valdivieso † | Archbishop of Quito, Ecuador | Archbishop Emeritus |
| 52.6 | Appointed | Juan Félix de Jesús Zepeda, O.F.M. Obs. † | Bishop of Comayagua, Honduras |
| 23 Jul | 35.5 | Appointed | Francisco de la Concepción Ramírez y González, O.F.M. Ref. † | Titular Bishop of Corada | Vicar Apostolic of Tamaulipas, México |
| 56.1 | Appointed | Jean Marcel Pierre Auguste Vérot, P.S.S. † | Bishop of Savannah, Georgia, USA | Bishop of Saint Augustine, Florida, USA |
| 25 Jul | 38.7 | Resigned | Mieczyslaw Halka Ledóchowski † | Apostolic Delegate to Colombia | Cardinal, Archbishop Emeritus of Gniezno e Poznań, Poland |
| 38.7 | Resigned | Mieczyslaw Halka Ledóchowski † | Apostolic Delegate to Venezuela | Cardinal, Archbishop Emeritus of Gniezno e Poznań, Poland |
| 38.7 | Resigned | Mieczyslaw Halka Ledóchowski † | Apostolic Delegate to Ecuador | Cardinal, Archbishop Emeritus of Gniezno e Poznań, Poland |
| 38.7 | Resigned | Mieczyslaw Halka Ledóchowski † | Apostolic Delegate to Peru | Cardinal, Archbishop Emeritus of Gniezno e Poznań, Poland |
| 38.7 | Resigned | Mieczyslaw Halka Ledóchowski † | Apostolic Delegate to Bolivia | Cardinal, Archbishop Emeritus of Gniezno e Poznań, Poland |
| 30.0 | Appointed | Francesco Tavani † | Apostolic Delegate to Venezuela | Auxiliary Bishop of Sabina (-Farfa), Italy |
| 30.0 | Appointed | Francesco Tavani † | Apostolic Delegate to Ecuador | Auxiliary Bishop of Sabina (-Farfa), Italy |
| 30.0 | Appointed | Francesco Tavani † | Apostolic Delegate to Peru | Auxiliary Bishop of Sabina (-Farfa), Italy |
| 30.0 | Appointed | Francesco Tavani † | Apostolic Delegate to Bolivia | Auxiliary Bishop of Sabina (-Farfa), Italy |
| 23.1 | Ordained Priest | Hermann Zschokke † | Priest of Wien {Vienna}, Austria | Auxiliary Bishop |
| 28 Jul | 35.5 | Ordained Bishop | José María Covarrubias y Mejía † | Bishop of Antequera, Oaxaca, México |
| 44.4 | Ordained Priest | Albin Dunajewski † | Priest of Kraków, Poland | Cardinal, Bishop |
| 30 Jul | | Born | Laurentius Josephus Antonius Hubertus Schrijnen (Schrynen) † | | Bishop of Roermond, Netherlands |
| Born | Ignacio Valdespino y Díaz † | | Bishop of Aguascalientes, México |
| 31 Jul | 49.3 | Resigned | Girolamo d’Andrea † | Prefect of the Congregation of the Index | Cardinal, Prefect Emeritus |
| 1 Aug | 34.6 | Ordained Bishop | Charles-Amable de la Tour d’Auvergne Lauraguais † | Titular Archbishop of Colossae | Archbishop of Bourges, France |
| 2 Aug | 23.5 | Ordained Priest | Richard Alphonsus O’Connor † | Priest of Montréal, Québec, Canada | Bishop of Peterborough, Ontario, Canada |
| 4 Aug | 27.8 | Ordained Priest | John Keys O’Doherty † | Priest | Bishop of Derry, Ireland |
| 35.6 | Ordained Bishop | Francisco de la Concepción Ramírez y González, O.F.M. Ref. † | Titular Bishop of Corada | Vicar Apostolic of Tamaulipas, México |
| 5 Aug | 43.7 | Appointed | Yuhanna Boutros El-Hajj † | Bishop of Baalbek (Maronite), Lebanon | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 6 Aug | 58.8 | Died | Giovanni Francesco Magnani † | Bishop of Recanati e Loreto, Italy |
| Born | Dominik Premuš † | | Auxiliary Bishop of Zagreb, Croatia |
| 10 Aug | 59.7 | Entered | Salvatore Vaccari, O.F.M. † | Priest of Order of Friars Minor | Prefect Emeritus of Aborigines of Australia |
| 11 Aug | 22.4 | Ordained Priest | Agostino Gaetano Riboldi † | Priest of Milano {Milan}, Italy | Cardinal, Archbishop of Ravenna, Italy |
| 13 Aug | 35.6 | Appointed | Francisco de la Concepción Ramírez y González, O.F.M. Ref. † | Vicar Apostolic of Tamaulipas, México |
| 15 Aug | 43.7 | Ordained Bishop | Yuhanna Boutros El-Hajj † | Bishop of Baalbek (Maronite), Lebanon | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 79.5 | Died | Francesco Maria Barzellotti † | Bishop of Sovana e Pitigliano, Italy |
| 30.7 | Ordained Priest | Rafail Popov † | Priest | Bishop of Bulgarian United Church (Constantinople) (Bulgarian) |
| 22.9 | Ordained Priest | Daniele Tempesta, O.F.M. Ref. † | Priest of Order of Reformed Friars Minor | Bishop of Troia, Italy |
| 17 Aug | 66.0 | Died | Giacomo Piccolomini † | Cardinal, Priest of the Roman Curia - Other |
| 18 Aug | 23.6 | Ordained Priest | Antonio Scotti † | Priest | Bishop Emeritus of Alife, Italy |
| 19 Aug | 65.5 | Died | Vincenzo Santucci † | Cardinal, Prefect of the Congregation for Studies |
| 24 Aug | 52.3 | Selected | Luigi di Canossa † | Cardinal, Bishop of Verona, Italy |
| 61.6 | Ordained Bishop | François-Marie-Joseph Lecourtier † | Bishop of Montpellier, France | Archbishop Emeritus |
| 56.1 | Selected | Federico Maria Zinelli † | Bishop of Treviso, Italy |
| 25 Aug | 55.3 | Ordained Bishop | Charles-Théodore Colet † | Bishop of Luçon, France | Archbishop of Tours, France |
| 46.0 | Ordained Bishop | Patrice-François-Marie Cruice † | Bishop of Marseille, France | Bishop Emeritus |
| 56.3 | Ordained Bishop | Henri Louis Charles Maret † | Titular Bishop of Sura | Titular Archbishop of Naupactus |
| 31 Aug | 73.9 | Died | Francesco Pichi † | Bishop Emeritus of Tivoli, Italy |