| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Tomás Badía, O.P. † | San Feliu de Saserra, Spain | Coadjutor Vicar Apostolic of Fo-Kien, China |
| 70.4 | Ordained Bishop | Sandor Bodonyi † | Titular Bishop of Belgrado e Semendria o Smederevo | Auxiliary Bishop of Vác, Hungary |
| 68.8 | Died | Antonio Raffaele Dolci, O.P. † | Bishop of Stagnum |
| 49.9 | Ordained Bishop | Nicolás García Jerez, O.P. † | Bishop of León en Nicaragua |
| 22.9 | Ordained Priest | José Sebastian Goyeneche Barreda † | Priest | Archbishop of Lima, Peru |
| Appointed | Hryhorij (Grzegorz) Koxanovyc (Kochanowicz) † | Bishop of Luceoria o Łuck e Zytomir o Zytomierz, Ukraine | Archbishop of Kyiv-Vyshhorod (Ukrainian), Ukraine |
| 63.6 | Died | Pietro Leopardi † | Bishop of Ancona e Numana, Italy |
| 52.1 | Died | Giuseppe Mancusi † | Bishop of Acerno, Italy |
| Born | Théodore Alexis Joseph de Montpellier † | Namur | Bishop of Liège, Belgium |
| 85.3 | Died | Pietro Ruggieri † | Bishop of Ruvo (Ruo), Italy |
| 75.9 | Died | Silvestro Scarani † | Auxiliary Bishop of Ostia (-Velletri), Italy |
| Born | Gabriele Sciasciatian † | Aleppo | Bishop of Mardin (Armenian), Iraq |
| 85.0 | Died | Emanuele de Tomasiis † | Bishop of Ascoli Satriano, Italy |
| Born | Franciscus Jacobus van Vree † | Rhenoy | Bishop of Haarlem, Netherlands |
| 1 Jan | 53.0 | Succeeded | Patrick Lambert, O.F.M. † | Vicar Apostolic of Newfoundland, Canada | Vicar Apostolic Emeritus |
| 8 Jan | 69.3 | Died | Antonio Tavira Almazán † | Bishop of Salamanca, Spain |
| 11 Jan | 62.8 | Ordained Bishop | Joseph Hieronymus Karl von Kolborn † | Titular Bishop of Capharnaum | Auxiliary Bishop of Regensburg, Germany |
| 13 Jan | 49.8 | Appointed | Peter Bernardine Collingridge, O.F.M. † | Coadjutor Vicar Apostolic of Western District, England, Great Britain | Vicar Apostolic |
| 49.8 | Appointed | Peter Bernardine Collingridge, O.F.M. † | Titular Bishop of Thespiae | Vicar Apostolic of Western District, England, Great Britain |
| 16 Jan | | Appointed | Fargal O'Reilly † | Bishop of Kilmore, Ireland |
| 17 Jan | | Born | Karl Pooten † | Achen | Archbishop of Bar (Antivari), Montenegro |
| 19 Jan | | Born | Angel Kraljevic † | Cerigai | Vicar Apostolic of Herzegovina |
| 20 Jan | 71.4 | Died | Johann Maximilian von Haunold † | Auxiliary Bishop of Mainz, Germany |
| 22 Jan | | Born | François Marinelli, O.S.A. † | Tolentino | Titular Archbishop of Porphyreon |
| 23 Jan | | Born | James Lynch, C.M. † | Dublin, Ireland | Bishop of Kildare and Leighlin, Ireland |
| 25 Jan | 23.0 | Ordained Priest | Pawel Straszynski † | Priest | Bishop of Sejny o Sejna o Augustów, Poland |
| 1 Feb | | Born | Giuseppe-Maria Mucedola † | S. Paolo | Bishop of Conversano, Italy |
| 2 Feb | 55.7 | Ordained Bishop | Andrés Quintian Ponte de Andrade † | Bishop of Cuenca, Ecuador |
| 5 Feb | | Born | William Riddell † | Felton Park | Vicar Apostolic of Northern District, England, Great Britain |
| 8 Feb | | Born | Léon-François Sibour † | Istres | Auxiliary Bishop Emeritus of Paris, France |
| 10 Feb | 77.3 | Died | Francisco José Marán † | Bishop of Santiago de Chile |
| 17 Feb | 77.0 | Died | Gregorio Cerati † | Bishop of Piacenza, Italy |
| 20 Feb | 87.1 | Died | Michael Peter MacMahon (McMahon), O.P. † | Bishop of Killaloe, Ireland |
| Succeeded | James O'Shaughnessy † | Bishop of Killaloe, Ireland |
| 1 Mar | | Born | Mattia Hirschler † | Winicky | Bishop of Przemyśl, Poland |
| 2 Mar | | Born | Adrian Wlodarski † | Nieder Heiduck | Auxiliary Bishop of Wrocław, Poland |
| 8 Mar | 38.0 | Ordained Bishop | José Maria de Araújo, O.S.H. † | Bishop of Olinda, Brazil |
| 13 Mar | 50.6 | Died | Antoine-Xavier Maynaud de Pancemont † | Bishop of Vannes, France |
| 14 Mar | 31.3 | Ordained Priest | Giacomo Filippo Fransoni † | Priest | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 28.4 | Ordained Priest | Hyacinthe-Louis de Quélen † | Priest | Archbishop of Paris, France |
| 15 Mar | 39.1 | Ordained Bishop | José Caetano da Silva Coutinho † | Bishop of São Sebastião do Rio de Janeiro, Brazil |
| 22.8 | Ordained Priest | Ivan (Jan) Snihurskyj (Snigurski) † | Priest | Bishop of Przemyśl (Ukrainian), Poland |
| Born | Pietro Paolo Trucchi, C.M. † | Tivoli | Bishop of Forli, Italy |
| 19 Mar | 62.0 | Died | Joseph Anton Blatter † | Bishop of Sion {Sitten}, Switzerland |
| 20 Mar | | Born | Clemente Pagliaro † | Acqualogna | Bishop of Anagni, Italy |
| 22 Mar | 40.5 | Appointed | Maurice-Jean-Madeleine de Broglie † | Bishop of Gent {Ghent, Gand}, Belgium |
| 57.0 | Appointed | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Bishop of Piacenza, Italy | Bishop Emeritus of Vaison, France |
| 71.4 | Appointed | Claude-Louis Rousseau † | Bishop of Orléans, France |
| 23 Mar | 64.8 | Appointed | Francisco Javier Aldazábal y Lodeña † | Bishop of Santa Cruz de la Sierra, Bolivia |
| 66.5 | Appointed | Stefano Bellini † | Bishop of Recanati-Loreto, Italy |
| 63.7 | Appointed | Marcello Maria Benci † | Bishop of Colle di Val d’Elsa, Italy |
| 65.1 | Appointed | Michel Leopold Brigido von Marenfels und Bresoviz † | Bishop of Spiš, Slovakia |
| 42.1 | Appointed | Francisco Ramón Valentín de Casaus y Torres, O.P. † | Auxiliary Bishop of Antequera, Oaxaca, México | Archbishop of Guatemala |
| 42.1 | Appointed | Francisco Ramón Valentín de Casaus y Torres, O.P. † | Titular Bishop of Rhosus | Archbishop of Guatemala |
| 49.2 | Appointed | Pedro García Panés, O.F.M. † | Bishop of Paraguay |
| 65.4 | Appointed | Niccolò Laparelli † | Bishop of Cortona, Italy |
| 38.3 | Appointed | Geraldo Maciioti † | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 38.3 | Appointed | Geraldo Maciioti † | Titular Bishop of Elusa | Auxiliary Bishop of Ostia (-Velletri), Italy |
| Born | Benedetto Riccabona de Reinchenfels † | Cavalese | Bishop of Trento, Italy |
| 65.3 | Appointed | Nicolás Videla del Pino † | Bishop of Salta, Argentina |
| 46.5 | Appointed | Samuel Vulcan † | Bishop of Foreign Diocese |
| 28 Mar | | Born | Giuseppe Rotondo (Rotundo) † | Capua | Archbishop of Taranto, Italy |
| Apr | 57.8 | Resigned | Joaquim Maria Mascarenhas Castello Branco † | Bishop of Angola e Congo, Angola | Bishop Emeritus |
| 6 Apr | | Born | Francesco Saverio Apuzzo † | Naples | Cardinal, Archbishop of Capua, Italy |
| 8 Apr | | Born | Francisco de Paula Jiménez Muñoz † | Bliecos | Bishop of Teruel, Spain |
| 11 Apr | | Born | Manoel Joaquim da Silveira † | Rio de Janeiro | Archbishop of São Salvador da Bahia, Brazil |
| Ordained Bishop | Hryhorij (Grzegorz) Koxanovyc (Kochanowicz) † | Bishop of Luceoria o Łuck e Zytomir o Zytomierz, Ukraine | Archbishop of Kyiv-Vyshhorod (Ukrainian), Ukraine |
| 23.9 | Ordained Priest | Johann Peter von Richarz † | Priest of Würzburg, Germany | Bishop of Augsburg, Germany |
| Born | Tommaso Michele Salzano, O.P. † | Napoli | Titular Archbishop of Edessa in Osrhoëne |
| 12 Apr | 63.8 | Ordained Bishop | Marcello Maria Benci † | Bishop of Colle di Val d’Elsa, Italy |
| 14 Apr | | Born | Florian-Jules-Félix Desprez † | Ostricourt | Cardinal, Archbishop of Toulouse (-Narbonne), France |
| 5 May | 62.8 | Died | Ignacy Houwalt † | Auxiliary Bishop-Elect of Vilnius, Lithuania |
| 7 May | 45.9 | Appointed | Pierre Dupont de Poursat † | Bishop of Coutances, France |
| 12 May | | Born | Rambaldo Magagnini † | Jesi | Bishop of Jesi, Italy |
| 15 May | 44.2 | Appointed | Thomas Smith † | Coadjutor Vicar Apostolic of Northern District, England, Great Britain | Vicar Apostolic |
| 44.2 | Appointed | Thomas Smith † | Titular Bishop of Bolina | Vicar Apostolic of Northern District, England, Great Britain |
| 23 May | 24.2 | Ordained Priest | Alexis Billiet † | Priest | Cardinal, Archbishop of Chambéry, France |
| 24 May | 66.5 | Appointed | Josef-Franz (Joseph François Xavier) de Preux † | Bishop of Sion {Sitten}, Switzerland |
| 25 May | | Born | Karl Johann Greith † | Rapperswil | Bishop of Sankt Gallen, Switzerland |
| 1 Jun | | Born | Paolo Brunoni † | Cipro | Titular Patriarch of Antiochia {Antioch} |
| 7 Jun | 24.0 | Ordained Priest | Giuseppe Maria Maniscalco, O.F.M. † | Priest of Order of Friars Minor | Bishop of Caltagirone, Italy |
| 46.7 | Ordained Bishop | Samuel Vulcan † | Bishop of Foreign Diocese |
| 8 Jun | | Born | Jovan Zaffron (Zoffran) † | Cursola | Bishop of Dubrovnik (Ragusa), Croatia |
| 13 Jun | | Born | Antonio Tommaso Yturalde † | Ambato | Bishop Emeritus of Ibarra, Ecuador |
| 18 Jun | 59.2 | Died | Joseph Anton Gall † | Bishop of Linz, Austria |