| Date | Age | Event | Bishop | Title | Current Title |
| 1 May | | Born | Thomas O’Gorman † | | Bishop of Sioux Falls, South Dakota, USA |
| 3 May | | Born | Edmond Francis Prendergast † | | Archbishop of Philadelphia, Pennsylvania, USA |
| 65.0 | Died | Manuel Vicuńa Larraín † | Archbishop of Santiago de Chile |
| 4 May | 22.5 | Ordained Priest | Anton Josef Gruscha † | Priest of Wien {Vienna}, Austria | Cardinal, Archbishop |
| Born | Cornelius O’Brien † | | Archbishop of Halifax, Nova Scotia, Canada |
| 75.2 | Died | Francisco de Sales Arrieta Ortiz, O.F.M. Obs. † | Archbishop of Lima, Peru |
| 5 May | | Born | Nicola Averardi † | | Titular Archbishop of Tarsus |
| 70.3 | Died | Ferenc (František) Lajcsák (Lajčák) † | Bishop Emeritus of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 7 May | | Died | Nicolaus Bianchi † | Archbishop of Durrës (Durazzo), Albania |
| 32.0 | Ordained Bishop | Gaetano Carli, O.F.M. Cap. † | Titular Bishop of Halmiros | Vicar Apostolic of Agra, India |
| 33.6 | Ordained Bishop | Giacomo Filippo Gentile † | Bishop of Novara, Italy |
| 53.3 | Ordained Bishop | Raffaele Purpo † | Bishop of Pozzuoli, Italy |
| 10 May | 70.1 | Died | Arcangelo Polidori † | Bishop of Foligno, Italy |
| 14 May | 52.6 | Ordained Bishop | Manfredo Giovanni Battista Bellati † | Bishop of Ceneda, Italy |
| 55.0 | Ordained Bishop | László Bémer de Bezdéd et Kisbáka † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania | Bishop Emeritus |
| 21 May | 50.0 | Ordained Bishop | Jan Teraszkiewicz † | Bishop of Bełz (Ukrainian), Poland | Administrator of Chełm and Bełz (Ukrainian), Poland |
| 24 May | | Appointed | Gaetano Antonio Mulsuce, C.O. † | Vicar Apostolic of Ceylon, Sri Lanka | Vicar Apostolic of Colombo, Sri Lanka |
| Appointed | Gaetano Antonio Mulsuce, C.O. † | Titular Bishop of Usula | Vicar Apostolic of Colombo, Sri Lanka |
| 26 May | 87.6 | Died | Pietro Luigi Scarabelli, C.M. † | Bishop Emeritus of Luni, Sarzana e Brugnato, Italy |
| 27 May | 85.1 | Died | Jean-Louis-Simon Lemercier † | Bishop Emeritus of Beauvais, France |
| 30 May | 43.4 | Appointed | Patrick Joseph Carew † | Titular Archbishop of Edessa in Osrhoëne | Vicar Apostolic of Western Bengal, India |
| Born | Beniamino Geremia, O.F.M. Obs. † | | Vicar Apostolic of Northern Shantung {Scian-Ton Settentrionale}, China |
| 3 Jun | 22.9 | Ordained Deacon | Johann Baptist Nogáll † | Deacon | Auxiliary Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 4 Jun | 80.7 | Died | András Bőle † | Bishop of Szombathely, Hungary |
| 8 Jun | 24.0 | Ordained Priest | Friedrich Josef von Schreiber † | Priest of Augsburg, Germany | Archbishop of Bamberg, Germany |
| 10 Jun | 24.6 | Ordained Priest | Gaetano Alimonda † | Priest of Genova, Italy | Cardinal, Archbishop of Torino {Turin}, Italy |
| 24.1 | Ordained Priest | Giuseppe Buscarini † | Priest of Piacenza, Italy | Bishop of Borgo San Donnino, Italy |
| 23.3 | Ordained Priest | Louis-Gabriel Delaplace, C.M. † | Priest of Congregation of the Mission | Vicar Apostolic of Northern Chi-Li {Ce-Li Settentrionale} o Pe-Kin, China |
| 25.4 | Ordained Priest | Stephen Fennelly † | Priest | Vicar Apostolic of Madras, India |
| 22.6 | Ordained Priest | Anastasio Laterza, O. Carm. † | Priest of Order of Our Lady of Mt. Carmel | Bishop of Boiano, Italy |
| 27.3 | Ordained Priest | John Joseph Lynch, C.M. † | Priest of Congregation of the Mission | Archbishop of Toronto, Ontario, Canada |
| 23.7 | Ordained Priest | Diego Marongiu Delrio † | Priest | Archbishop of Sassari, Italy |
| 22.9 | Ordained Priest | Antonio Vincenzo Testa, O.F.M. Obs. † | Priest of Order of Observant Friars Minor | Bishop of Segni, Italy |
| 23.3 | Ordained Priest | Peregrini Tofoni † | Priest | Bishop of Assisi, Italy |
| 11 Jun | 53.5 | Ordained Bishop | William Dollard (Dullard) † | Bishop of Fredericton, New Brunswick, Canada |
| 48.8 | Ordained Bishop | Vasile Erdély † | Bishop of Oradea Mare {Gran Varadino} (Romanian), Romania |
| 40.1 | Ordained Bishop | Joseph Ponsot, M.E.P. † | Titular Bishop of Philomelium | Vicar Apostolic of Yünnan, China |
| 13 Jun | 39.8 | Selected | Clemente (a S. Theresia) Manzini, O. Carm. † | Bishop of Cuneo, Italy |
| 14 Jun | 55.6 | Died | Claude-Marie-Paul Tharin † | Bishop Emeritus of Strasbourg, France |
| 18 Jun | | Born | Joseph Patrick Byrne † | | Bishop of Bathurst, Australia |
| 19 Jun | 61.3 | Appointed | Niccola Belletti † | Bishop of Foligno, Italy |
| 71.9 | Elevated to Cardinal | Antonio Maria Cadolini, B. † | Cardinal, Bishop of Ancona e Numana, Italy |
| 51.7 | Appointed | Jan Kanty Dąbrowski † | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 51.7 | Appointed | Jan Kanty Dąbrowski † | Titular Bishop of Helenopolis in Bithynia | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 44.2 | Confirmed | Giuseppe Maria d’Alessandro † | Bishop of Capaccio, Italy | Bishop of Sessa Aurunca, Italy |
| 42.6 | Confirmed | José Maria da Silva Torres, O.S.B. † | Archbishop of Goa, India | Coadjutor Bishop Emeritus of Braga, Portugal |
| 59.6 | Confirmed | Jerónimo José da Costa Rebelo † | Bishop of Porto, Portugal |
| 55.6 | Confirmed | Luigi Giamporcaro † | Bishop of Lacedonia, Italy | Bishop of Monopoli, Italy |
| 39.5 | Confirmed | Rocco de Gregorio † | Bishop of San Severo, Italy |
| 42.4 | Confirmed | Giuseppe Iannuzzi † | Bishop of Lucera, Italy |
| Born | Ivan Baptista Krapŕc † | | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 57.3 | Appointed | Mathias Pollitzer † | Auxiliary Bishop of Wien {Vienna}, Austria |
| 57.3 | Appointed | Mathias Pollitzer † | Titular Bishop of Telmissus | Auxiliary Bishop of Wien {Vienna}, Austria |
| 66.4 | Confirmed | Nicolaus Rodrigues Pereira de Borja, C.M. † | Bishop of Macau, China | Bishop-Elect |
| 39.9 | Appointed | Felicissimo Salvini † | Bishop of Acquapendente, Italy | Archbishop of Camerino, Italy |
| 77.3 | Elevated to Cardinal | Francisco de Săo Luiz (Manoel Justiniano) Saraiva, O.S.B. † | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 58.1 | Confirmed | Michel’ Angelo Sorrentino † | Bishop of Marsi, Italy |
| 22 Jun | 52.5 | Appointed | Pier Grisologo Basetti (Bassetti) † | Bishop of Borgo San Donnino, Italy |
| 71.9 | Appointed | Antonio Maria Cadolini, B. † | Cardinal-Priest of San Clemente | Cardinal, Bishop of Ancona e Numana, Italy |
| 65.2 | Appointed | Francesco Saverio Gargiulo † | Titular Bishop of Thyatira |
| 47.9 | Confirmed | Antonio Gava † | Bishop of Belluno e Feltre, Italy | Bishop Emeritus |
| 54.8 | Confirmed | Josip Godeassi † | Archbishop of Zadar (Zara), Croatia |
| 64.9 | Appointed | Anton Ferdinand Holtgreven † | Auxiliary Bishop of Paderborn, Germany |
| 64.9 | Appointed | Anton Ferdinand Holtgreven † | Titular Bishop of Lycopolis | Auxiliary Bishop of Paderborn, Germany |
| 55.4 | Appointed | José Manuel Gregorio Indaburu (Yndaburu) † | Bishop of La Paz, Bolivia |
| 75.7 | Appointed | Giuseppe Novak † | Titular Archbishop of Larissa in Thessalia | Archbishop Emeritus of Zadar (Zara), Croatia |
| 63.3 | Appointed | Francesco di Paola Villadecani † | Cardinal-Priest of Santi Bonifacio ed Alessio | Cardinal, Archbishop of Messina, Italy |
| 24 Jun | 44.2 | Ordained Bishop | Giuseppe Maria d’Alessandro † | Bishop of Capaccio, Italy | Bishop of Sessa Aurunca, Italy |
| 39.5 | Ordained Bishop | Rocco de Gregorio † | Bishop of San Severo, Italy |
| 25 Jun | 50.2 | Ordained Bishop | Jozef Gaganecz † | Bishop of Prešov (Prjašev, Eperjes) (Slovak), Slovakia | Bishop of Prešov (Prjašev) (Slovak), Slovakia |
| 47.9 | Ordained Bishop | Antonio Gava † | Bishop of Belluno e Feltre, Italy | Bishop Emeritus |
| 55.6 | Ordained Bishop | Luigi Giamporcaro † | Bishop of Lacedonia, Italy | Bishop of Monopoli, Italy |
| 42.4 | Ordained Bishop | Giuseppe Iannuzzi † | Bishop of Lucera, Italy |
| 39.9 | Ordained Bishop | Felicissimo Salvini † | Bishop of Acquapendente, Italy | Archbishop of Camerino, Italy |
| 58.1 | Ordained Bishop | Michel’ Angelo Sorrentino † | Bishop of Marsi, Italy |
| 27 Jun | 90.0 | Died | François-Melchior-Charles-Bienvenu de Miollis † | Bishop Emeritus of Digne, France |
| 2 Jul | 28.5 | Ordained Priest | Joseph Gonnet, S.J. † | Priest of Society of Jesus | Pro-Vicar Apostolic Emeritus of Kiangnan, China |
| 50.4 | Ordained Bishop | Guilherme Henriques de Carvalho † | Bishop of Leiria, Portugal | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 89.0 | Died | Péter Klobusiczky † | Archbishop of Kalocsa, Hungary |
| 5 Jul | | Born | Pedro Armengol Valenzuela Poblete, O. de M. † | | Bishop Emeritus of San Carlos de Ancud, Chile |
| 6 Jul | 57.0 | Died | Peter Augustine Baines, O.S.B. † | Vicar Apostolic of Western District, England, Great Britain |
| 7 Jul | | Resigned | Giorgio Gabinelli † | Bishop of Tinos and Mykonos, Greece | Bishop Emeritus |
| 51.6 | Succeeded | Francesco Zaloni † | Bishop of Tinos and Mykonos, Greece |
| 9 Jul | 65.2 | Ordained Bishop | Francesco Saverio Gargiulo † | Titular Bishop of Thyatira |
| 66.1 | Ordained Bishop | José Agustín de la Sierra Mercado † | Bishop of La Serena, Chile |
| 10 Jul | | Born | Domenico Cocchia, O.F.M. Cap. † | | Bishop of Ascoli Satriano e Cerignola, Italy |
| 14 Jul | 38.4 | Selected | José Affonso de Moraes Torres, C.M. † | Bishop of Belém do Pará, Brazil | Bishop Emeritus |
| 15 Jul | 37.5 | Appointed | Andrea Canova, O.F.M. Cap. † | Vicar Apostolic of Sofia e Plovdiv, Bulgaria |
| 56.1 | Selected | Antônio Ferreira Viçoso, C.M. † | Bishop of Mariana, Brazil |
| 25.9 | Ordained Deacon | Cölestin (Josef) Ganglbauer, O.S.B. † | Deacon of Order of Saint Benedict | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 23.0 | Ordained Priest | Johann Baptist Nogáll † | Priest | Auxiliary Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 17 Jul | | Elected | Gregory Petros VIII (Michel) Der-Astvadzadourian † | Patriarch of Cilicia (Armenian), Lebanon |
| 19 Jul | 78.1 | Died | Giovanni Battista Accusani † | Bishop of Vigevano, Italy |
| 21 Jul | 66.3 | Selected | Manuel Pires de Azevedo Loureiro † | Bishop of Beja, Portugal |
| 45.6 | Selected | José Xavier de Cerveira e Sousa † | Bishop of Funchal, Portugal | Bishop of Viseu, Portugal |
| 54.3 | Selected | António Bernardo da Fonseca Monís † | Bishop of Faro {Algarve}, Portugal | Bishop of Porto, Portugal |
| 55.5 | Appointed | Charles McNally † | Coadjutor Bishop of Clogher, Ireland | Bishop |
| 55.5 | Appointed | Charles McNally † | Titular Bishop of Tricomia | Bishop of Clogher, Ireland |
| 75.9 | Died | Carlo Giuseppe Peda, B. † | Bishop of Assisi, Italy |
| 22 Jul | 25.9 | Ordained Priest | Cölestin (Josef) Ganglbauer, O.S.B. † | Priest of Order of Saint Benedict | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 23 Jul | 57.4 | Ordained Bishop | Mathias Pollitzer † | Titular Bishop of Telmissus | Auxiliary Bishop of Wien {Vienna}, Austria |
| 26 Jul | 24.5 | Ordained Priest | Krizosztom Károly Kruesz, O.S.B. † | Priest of Order of Saint Benedict | Abbot of Pannonhalma, Hungary |
| 30 Jul | 25.7 | Ordained Priest | Grégoire (Krikor) Balitian † | Priest of Alep (Armenian), Syria | Bishop |
| 1 Aug | 25.5 | Ordained Priest | Albert (Franz de Paula) Eder, O.S.B. † | Priest of Order of Saint Benedict | Archbishop of Salzburg, Austria |
| 3 Aug | 42.9 | Resigned | Giuseppe Agostino Salomoni, C.M. † | Bishop of Cuneo, Italy | Bishop Emeritus |
| 86.3 | Died | Fabrizio Sceberras Testaferrata † | Cardinal, Bishop of Senigallia, Italy |
| 6 Aug | | Born | Joseph van Reeth, S.J. † | | Bishop of Galle, Sri Lanka |
| 11 Aug | 44.6 | Incardinated | Thomas Heyden † | Priest of Pittsburgh, Pennsylvania, USA |
| 32.8 | Appointed | Michael J. O’Connor, S.J. † | Bishop of Pittsburgh, Pennsylvania, USA | Bishop Emeritus |
| 60.3 | Died | Moritz-Fabian Roten † | Bishop of Sion {Sitten}, Switzerland |
| 45.8 | Appointed | James Sharples † | Coadjutor Vicar Apostolic of Lancashire District, England, Great Britain |
| 45.8 | Appointed | James Sharples † | Titular Bishop of Samaria | Coadjutor Vicar Apostolic of Lancashire District, England, Great Britain |
| 13 Aug | 52.6 | Installed | Pier Grisologo Basetti (Bassetti) † | Bishop of Borgo San Donnino, Italy |
| 14 Aug | 34.6 | Appointed | Jean-Joseph-Jean-Baptiste Ferréol, M.E.P. † | Vicar Apostolic of Corea |
| 34.6 | Appointed | Jean-Joseph-Jean-Baptiste Ferréol, M.E.P. † | Titular Bishop of Belline | Vicar Apostolic of Corea |
| 68.6 | Died | Nicola Giuseppe Ugo † | Archbishop of Sorrento, Italy |
| 15 Aug | 32.8 | Ordained Bishop | Michael J. O’Connor, S.J. † | Bishop of Pittsburgh, Pennsylvania, USA | Bishop Emeritus |
| 45.8 | Ordained Bishop | James Sharples † | Titular Bishop of Samaria | Coadjutor Vicar Apostolic of Lancashire District, England, Great Britain |
| 17 Aug | | Born | Mariano Rampolla del Tindaro † | | Cardinal, Secretary of the Congregation of the Holy Office |
| 18 Aug | | Born | José Belisario Santistevan Seoane † | | Bishop of Santa Cruz de la Sierra, Bolivia |
| 19 Aug | | Born | Mark Stanislaus Gross † | | Priest of Baltimore, Maryland, USA |
| 20 Aug | 23.7 | Ordained Deacon | Marko Kalogjera (Calogerŕ) † | Deacon of Dubrovnik (Ragusa), Croatia | Bishop of Split-Makarska (Spalato-Macarska), Croatia |
| 51.9 | Ordained Bishop | Jan Kanty Dąbrowski † | Titular Bishop of Helenopolis in Bithynia | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 59.8 | Ordained Bishop | Jerónimo José da Costa Rebelo † | Bishop of Porto, Portugal |
| Born | Nicolň Marini † | | Cardinal, Secretary Emeritus of the Congregation for the Oriental Churches |
| 48.5 | Ordained Bishop | Patrick Phelan, P.S.S. † | Titular Bishop of Carrhae | Bishop of Kingston, Ontario, Canada |
| 72.1 | Died | José María Irigoyen y Munoz Cano † | Auxiliary Bishop of Antequera, Oaxaca, México |
| 21 Aug | | Died | Grégoire Pierre Chahiat, B.C. † | Archbishop of Alep [Beroea, Halab] (Melkite Greek), Syria |
| 22 Aug | 79.8 | Died | Wilhelm Arnold Günther, O. Praem. † | Auxiliary Bishop of Trier, Germany |
| 24 Aug | 24.2 | Ordained Priest | Eligio Pietro Cosi, O.F.M. Obs. † | Priest of Order of Observant Friars Minor | Vicar Apostolic of Shantung {Scian-Ton} (Chan-tong), China |
| Born | Luigi del Forno † | | Bishop of Nocera de’ Pagani, Italy |
| 65.0 | Ordained Bishop | Anton Ferdinand Holtgreven † | Titular Bishop of Lycopolis | Auxiliary Bishop of Paderborn, Germany |
| 47.2 | Ordained Bishop | Martinus Johannes Niewindt † | Titular Bishop of Chytri | Vicar Apostolic of Curaçao, Netherlands Antilles, Antilles |
| 26 Aug | 30.6 | Appointed | Thomas Olliffe † | Coadjutor Vicar Apostolic of Bengal, India | Coadjutor Vicar Apostolic of Western Bengal, India |
| 30.6 | Appointed | Thomas Olliffe † | Titular Bishop of Milo | Coadjutor Vicar Apostolic of Western Bengal, India |
| 27 Aug | 23.7 | Ordained Priest | Marko Kalogjera (Calogerŕ) † | Priest of Dubrovnik (Ragusa), Croatia | Bishop of Split-Makarska (Spalato-Macarska), Croatia |
| 30 Aug | | Born | Ferdinand Maria Ossi, O.C.D. † | | Bishop of Quilon, India |
| 31 Aug | 82.8 | Died | Jacques-Louis-David de Séguin des Hons † | Bishop of Troyes, France |