| Date | Age | Event | Bishop | Title | Current Title |
| May | 48.4 | Succeeded | Francis Joseph Nicholson, O.C.D. † | Archbishop of Corfù, Greece |
| 83.6 | Died | Pietro Antonio Nostrano † | Archbishop of Corfù, Greece |
| 1 May | | Born | Friedrich Philipp von Abert † | | Archbishop of Bamberg, Germany |
| 2 May | 46.3 | Ordained Bishop | Giovanni Battista Arnaldi † | Titular Bishop of Auzia | Archbishop of Spoleto, Italy |
| 3 May | 49.0 | Appointed | Paul Cullen † | Cardinal, Archbishop of Dublin, Ireland |
| Born | Sebastião Leite de Vasconcellos † | | Bishop Emeritus of Beja, Portugal |
| 4 May | 38.3 | Appointed | Thomas Louis Connolly, O.F.M. Cap. † | Bishop of Fredericton, New Brunswick, Canada | Archbishop of Halifax, Nova Scotia, Canada |
| 47.4 | Appointed | William Walsh † | Archbishop of Halifax, Nova Scotia, Canada |
| 5 May | | Born | Pietro Gasparri † | | Cardinal, Chamberlain (Camerlengo) of the Apostolic Chamber |
| 69.1 | Died | Franz Großmann (Grossmann) † | Auxiliary Bishop of Warmia (Ermland), Poland |
| 6 May | 50.1 | Died | Richard Patrick Smith † | Archbishop of Port of Spain, Trinidad and Tobago, Antilles |
| 8 May | | Born | Domenico Bianconi † | | Bishop of Ferentino, Italy |
| Born | Filippo Giustini † | | Cardinal, Prefect of the Congregation of the Discipline of the Sacraments |
| Born | Michel Houdé † | | Prefect Emeritus of Isole di Mayotta, Nossi-Bé e Comore, Madagascar |
| 12 May | 74.7 | Died | José Luis Serrano † | Bishop of Santa Marta, Colombia |
| 15 May | 72.7 | Died | Antolín García Lozano † | Bishop of Salamanca, Spain |
| 16 May | 55.5 | Ordained Bishop | Georg Anton Brinkmann † | Titular Bishop of Oropus | Auxiliary Bishop of Münster, Germany |
| 17.1 | Professed | Alfonso Maria Giordano, C.Ss.R. † | Member of Congregation of the Most Holy Redeemer | Bishop Emeritus of Calvi e Teano, Italy |
| 52.2 | Ordained Bishop | Louis-Eugène Regnault † | Titular Bishop of Eumenia | Bishop of Chartres, France |
| 22 May | 88.3 | Died | Ignatius Papasian, C.A.M. † | Titular Archbishop of Tharona |
| 23 May | 58.3 | Ordained Bishop | Jean-Jacques-Marie-Antoine Guerrin † | Bishop of Langres, France |
| Born | Joseph-Marie Lavest, M.E.P. † | | Prefect of Kuamsi (Kwangsi, Guangxi), China |
| 54.1 | Ordained Bishop | Józef Alojzy Pukalski † | Bishop of Tarnów, Poland |
| 24 May | | Born | Felipe Arguinzonis y Astorbiza, O.C.D. † | | Archbishop Emeritus of Verapoly, India |
| 82.2 | Died | Andrew Carruthers † | Vicar Apostolic of Eastern District, Scotland, Great Britain |
| 50.1 | Succeeded | James Gillis † | Vicar Apostolic of Eastern District, Scotland, Great Britain |
| 26 May | 46.7 | Selected | Luigi Guglielmi † | Bishop of Verona, Italy |
| 51.2 | Selected | Giuseppe Luigi Trevisanato † | Archbishop of Udine, Italy | Cardinal, Patriarch of Venezia {Venice}, Italy |
| Born | Wladyslaw Michal Zaleski † | | Titular Patriarch of Antiochia {Antioch} |
| 30 May | 62.7 | Ordained Bishop | József Krautmann † | Titular Bishop of Knin (Tinin), Croatia | Auxiliary Bishop of Esztergom, Hungary |
| 2 Jun | 58.4 | Selected | André Charvaz † | Archbishop of Genova, Italy | Archbishop Emeritus |
| 5 Jun | 22.8 | Ordained Priest | Eugenio Cano † | Priest | Bishop Emeritus of Bosa, Italy |
| 30.4 | Ordained Priest | Francisco Cardoso Ayres † | Priest | Bishop of Olinda, Brazil |
| 23.9 | Ordained Priest | Francesco d’Albore † | Priest | Bishop Emeritus of Monopoli, Italy |
| 22.3 | Ordained Deacon | Pedro Maria de Lacerda † | Deacon of São Sebastião do Rio de Janeiro, Brazil | Bishop |
| 23.3 | Ordained Priest | Giacinto Magliulo † | Priest of Aversa, Italy | Bishop of Acerra, Italy |
| 23.1 | Ordained Priest | Jorge Montes Solar † | Priest of Santiago de Chile | Auxiliary Bishop |
| 23.1 | Ordained Priest | Giovanni Pietro Natoli † | Priest | Bishop of Lipari, Italy |
| 22.7 | Ordained Priest | Luigi Nicora † | Priest | Bishop of Como, Italy |
| 23.7 | Ordained Priest | Adrien-François Rouger, C.M. † | Priest of Congregation of the Mission | Vicar Apostolic of Southern Kiangsi {Kiam-Si Meridionale}, China |
| 22.6 | Ordained Priest | Joseph-Simon Theurel, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 6 Jun | 60.6 | Ordained Bishop | Antônio Joaquim de Mello † | Bishop of São Paulo, Brazil |
| Born | Adolphe Le Chaptois, M. Afr. † | | Vicar Apostolic of Tanganyika, Tanzania |
| 7 Jun | | Born | George Crompton Ambrose Burton † | | Bishop of Clifton, England, Great Britain |
| 8 Jun | 60.3 | Appointed | Thomas Cooke † | Bishop of Trois-Rivières, Québec, Canada |
| 48.3 | Appointed | John Charles Prince † | Bishop of Saint-Hyacinthe, Québec, Canada |
| 12 Jun | 44.4 | Selected | Michele Maria Caputo, O.P. † | Bishop of Oppido Mamertina, Italy | Bishop of Ariano, Italy |
| 35.1 | Selected | Antonio La Scala † | Bishop of Gallipoli, Italy | Bishop of San Severo, Italy |
| 13 Jun | 64.8 | Died | Domenico Castelli, O.P. † | Archbishop of Naxos, Greece |
| 50.4 | Ordained Bishop | Benito Forcelledo Tuero † | Bishop of Astorga, Spain |
| 14 Jun | 60.7 | Installed | Antônio Joaquim de Mello † | Bishop of São Paulo, Brazil |
| 15 Jun | 58.3 | Selected | Agustín Guillermo Charún Espinoza † | Bishop of Trujillo, Peru |
| 39.3 | Selected | Pedro Ruiz Zumaeta † | Bishop of Chachapoyas, Peru |
| 17 Jun | | Born | Ramón Ríu y Cabanas † | | Bishop of Urgell, Spain |
| 18 Jun | | Born | János Csernoch † | | Cardinal, Archbishop of Esztergom, Hungary |
| 28.2 | Ordained Priest | Casimiro Herrero Pérez, O.S.A. † | Priest of Order of St. Augustine | Bishop of Nueva Caceres, Philippines |
| 19 Jun | 68.4 | Appointed | Gennaro Saladino † | Bishop of Isernia e Venafro, Italy |
| Died | Francisco Villardel, O.F.M. Obs. † | Vicar Apostolic of Alep [Beroea, Halab], Syria |
| 20 Jun | 48.5 | Ordained Bishop | Luis de la Lastra y Cuesta † | Bishop of Orense, Spain | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| 27 Jun | 67.7 | Died | Frédéric Cao Sanna, Sch. P. † | Vicar Apostolic of Ava e Pegù, Myanmar | Vicar Apostolic Emeritus |
| 28 Jun | 16.7 | Professed | Luigi (Domenico Daniele) Sepiacci, O.E.S.A. † | Member of Order of Hermits of St. Augustine | Cardinal, Prefect of the Congregation for Indulgences and Relics |
| 29 Jun | 54.2 | Installed | Józef Alojzy Pukalski † | Bishop of Tarnów, Poland |
| 30 Jun | 77.4 | Died | Jerónimo do Barco, O.F.M. Ref. † | Bishop Emeritus of Santiago de Cabo Verde |
| Jul | 55.7 | Resigned | Gennaro di Giacomo † | Bishop of Telese o Cerreto Sannita, Italy | Bishop of Alife, Italy |
| 4 Jul | 46.1 | Ordained Bishop | Gaetano Bedini † | Titular Archbishop of Thebae | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 6 Jul | 43.8 | Appointed | Joseph La Rocque † | Coadjutor Bishop of Montréal, Québec, Canada | Bishop Emeritus of Saint-Hyacinthe, Québec, Canada |
| 43.8 | Appointed | Joseph La Rocque † | Titular Bishop of Cydonia (Agia, Canea) | Bishop Emeritus of Saint-Hyacinthe, Québec, Canada |
| 77.2 | Died | Franciszek di Paolo Pawłowski † | Bishop of Płock, Poland |
| 10 Jul | 22.9 | Ordained Deacon | Pedro José Cayetano de la Llosa, C.O. † | Deacon of Confederation of Oratorians of St. Philip Neri | Archbishop of La Plata o Charcas, Bolivia |
| Born | Jean-Maria Michon, S.M.A. † | | Prefect of Costa d’Oro {Gold Coast}, Ghana |
| 11 Jul | 22.9 | Ordained Priest | Pedro José Cayetano de la Llosa, C.O. † | Priest of Confederation of Oratorians of St. Philip Neri | Archbishop of La Plata o Charcas, Bolivia |
| 43.8 | Selected | Fernando de la Puente y Primo de Rivera † | Bishop of Salamanca, Spain | Cardinal, Archbishop of Burgos, Spain |
| 54.4 | Selected | Telmo Maceira † | Bishop of Mondoñedo, Spain | Bishop of Tuy, Spain |
| 23.1 | Ordained Priest | Pierre-Marie Osouf, M.E.P. † | Priest of La Société des Missions Etrangères | Archbishop of Tōkyō, Japan |
| 70.8 | Selected | Gregorio Sánchez y Jiménez (Rubio), O.S.H. † | Bishop of Ávila, Spain |
| 14 Jul | 77.5 | Died | Edmund Martin French, O.P. † | Bishop of Kilmacduagh, Ireland |
| 49.6 | Selected | Pasquale de Lucia † | Bishop of Gerace, Italy |
| 22 Jul | 56.7 | Died | John Joseph Mary Benedict Chanche, P.S.S. † | Bishop of Natchez, Mississippi, USA |
| 23.8 | Ordained Deacon | József Samassa † | Deacon | Cardinal, Archbishop of Eger, Hungary |
| 23 Jul | 70.2 | Died | Vicente Ortiz y Labastida, O.P. † | Bishop of Tarazona, Spain |
| 23.8 | Ordained Priest | József Samassa † | Priest | Cardinal, Archbishop of Eger, Hungary |
| 24 Jul | | Born | Károly Emmánuel de Csáky † | | Bishop of Vác, Hungary |
| 25 Jul | 48.4 | Succeeded | Georges-Claude-Louis-Pie Chalandon † | Bishop of Belley, France | Archbishop of Aix (-Arles-Embrun), France |
| 32.5 | Ordained Bishop | Louis-Gabriel Delaplace, C.M. † | Titular Bishop of Hadrianopolis in Honoriade | Vicar Apostolic of Northern Chi-Li {Ce-Li Settentrionale} o Pe-Kin, China |
| 85.5 | Died | Alexandre-Raymond Devie † | Bishop of Belley, France |
| 26 Jul | 23.8 | Ordained Deacon | Karl Schwarz † | Deacon of Praha {Prague}, Czechia | Auxiliary Bishop |
| 27 Jul | 75.1 | Died | Ângelo de Nossa Senhora da Boa-Morte, O.F.M. Disc. † | Bishop of Elvas, Portugal |
| 29 Jul | 23.8 | Ordained Priest | Karl Schwarz † | Priest of Praha {Prague}, Czechia | Auxiliary Bishop |
| 1 Aug | | Born | Ramón Ángel Jara Ruz † | | Bishop of La Serena, Chile |
| 3 Aug | | Born | Domenico Serafini, O.S.B. † | | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 4 Aug | 32.1 | Ordained Deacon | Pedro Juan Aponte † | Deacon | Bishop of Paraguay (o Ssma Assunzione) |
| 5 Aug | 45.3 | Selected | Vicente Horcos y San Martín, O.S.B. † | Bishop of Osma, Spain |
| 63.5 | Selected | Antonio María Sánchez Cid y Carrascal, C.O. † | Bishop of Coria, Spain |
| 6 Aug | 38.7 | Incardinated | Manuel Teodoro del Valle Seoane † | Priest of Lima, Peru | Archbishop Emeritus |
| 8 Aug | | Born | Yousef VI Emmanuel II Thomas † | | Patriarch of Babylon {Babilonia} (Chaldean), Iraq |
| 10 Aug | 23.5 | Ordained Priest | Paul Leopold Haffner † | Priest of Rottenburg, Germany | Bishop of Mainz, Germany |
| 22.5 | Ordained Priest | Pedro Maria de Lacerda † | Priest of São Sebastião do Rio de Janeiro, Brazil | Bishop |
| 12 Aug | 24.3 | Ordained Deacon | Giovanni Nepomuceno Glavina † | Deacon | Bishop Emeritus of Trieste e Capodistria (Trst i Koper), Italy |
| 15 Aug | 38.6 | Ordained Bishop | Thomas Louis Connolly, O.F.M. Cap. † | Bishop of Fredericton, New Brunswick, Canada | Archbishop of Halifax, Nova Scotia, Canada |
| 35.8 | Ordained Bishop | Lajos Haynald † | Titular Bishop of Hebron | Cardinal, Archbishop of Kalocsa, Hungary |
| 51.5 | Final Vows | John Larkin, S.J. † | Priest of Society of Jesus |
| 23.2 | Ordained Priest | Germán de Ascensión Villalvazo y Rodríguez † | Priest | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 17 Aug | 24.3 | Ordained Priest | Giovanni Nepomuceno Glavina † | Priest | Bishop Emeritus of Trieste e Capodistria (Trst i Koper), Italy |
| 18 Aug | 67.0 | Selected | Michele Manzo † | Archbishop of Chieti, Italy |
| 22 Aug | 40.5 | Ordained Bishop | Pedro José de Jesús Loza y Pardavé † | Bishop of Sonora, México | Archbishop of Guadalajara, Jalisco, México |
| 18.7 | Professed | Antonio Maria Saeli, C.Ss.R. † | Member of Congregation of the Most Holy Redeemer | Bishop of Mazara del Vallo, Italy |
| 26 Aug | 33.8 | Succeeded | St. José María Díaz Sanjurjo, O.P. † | Vicar Apostolic of Central Tonking {Tonkino Centrale}, Viet Nam |
| 41.0 | Died | Domingo Martí, O.P. † | Vicar Apostolic of Central Tonking {Tonkino Centrale}, Viet Nam |
| 27 Aug | 39.5 | Appointed | François-Marie-Henri-Agathon Pellerin, M.E.P. † | Titular Bishop of Hierapolis in Isauria | Vicar Apostolic of Northern Cochin {Cocincina Settentrionale}, Viet Nam |
| 28 Aug | 48.8 | Died | Carlo Giacinto Luigi Maria Fantini † | Bishop of Fossano, Italy |
| Born | Agostino Migliore † | | Bishop of Monopoli, Italy |
| 30 Aug | 27.9 | Ordained Priest | Richard Gilmour † | Priest of Cincinnati, Ohio, USA | Bishop of Cleveland, Ohio, USA |
| 25.8 | Ordained Priest | John Quinlan † | Priest of Cincinnati, Ohio, USA | Bishop of Mobile, Alabama, USA |
| 31 Aug | 49.0 | Resigned | Tomás Iglesias y Bárcones † | Bishop of Mondoñedo, Spain | Patriarch of West Indies, Spain |