| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 42.4 | Ordained Bishop | Zenobio Maria Benucci, O.F.M. Cap. † | Vicar Apostolic of Tibet-Hindustan, India |
| Appointed | Ignace Flavianos Dahan, B.C. † | Archbishop of Beirut {Bairut} (Melkite Greek), Lebanon |
| Born | Joaquín Guillermo González † | Medellin | Bishop Emeritus of Antioquía, Colombia |
| Appointed | Basilios Elias Khalil, B.S. † | Bishop of Saïda (Melkite Greek), Lebanon |
| 24.2 | Ordained Priest | Florencio Llorente y Montón † | Priest | Bishop of Gerona, Spain |
| 24.3 | Ordained Priest | José López y Crespo † | Priest | Bishop of Santander, Spain |
| 16.9 | Professed | Giuseppe Novella, O.F.M. † | Member of Order of Friars Minor | Coadjutor Vicar Apostolic Emeritus of Houkouang, China |
| Died | Mathieu Righet † | Vicar Apostolic of Alexandria {Alessandria} (Coptic), Egypt |
| 71.9 | Appointed | Jozef Schedy † | Bishop of the Titular See |
| 1 Jan | 86.4 | Died | Lorenzo de Dominicis † | Bishop of Civita Castellana, Orte e Gallese, Italy |
| 78.8 | Installed | Johann Nepomuk von Wolf † | Bishop of Regensburg, Germany |
| 6 Jan | 67.4 | Died | Jean-Baptiste Dubois † | Bishop of Dijon, France |
| 65.6 | Ordained Bishop | Antonio Leonardis da Lucinico † | Bishop of Trieste, Italy | Bishop of Trieste e Capodistria (Koper), Italy |
| 7 Jan | 17.3 | Professed | Louis-Désiré Maigret, SS.CC. † | Member of Congregation of the Sacred Hearts of Jesus and Mary | Vicar Apostolic of Sandwich Islands, Hawaii, USA |
| 10 Jan | 74.5 | Selected | Giovanni Battista Bolognese † | Bishop of Andria, Italy |
| 60.5 | Selected | Giuseppe Maria Botticelli, O.F.M. † | Bishop of Gallipoli, Italy | Bishop of Lacedonia, Italy |
| 71.9 | Selected | Claude-Jean-Joseph Brulley de La Brunière † | Bishop of Mende, France |
| 65.0 | Selected | Carlo-Maria Cernelli † | Archbishop of Chieti, Italy |
| 60.2 | Selected | Giovanni De Simone, C.M. † | Bishop of Trivento, Italy | Bishop of Conversano, Italy |
| 58.9 | Selected | Gaetano Maria de Franci † | Archbishop of Trani e Bisceglie, Italy | Archbishop of Trani e Nazareth e Bisceglie, Italy |
| 51.7 | Selected | Pietro Ignazio Marolda, C.SS.R. † | Bishop of Potenza e Marsico Nuovo, Italy | Bishop of Pozzuoli, Italy |
| 60.4 | Selected | Charles-Louis Salmon du Châtelier † | Bishop of Evreux, France |
| 12 Jan | 47.4 | Selected | Charles Thomas Arnosio † | Archbishop of Sassari, Italy |
| 69.0 | Resigned | Giovanni Francesco Guerrieri † | Bishop of Rimini, Italy | Bishop Emeritus |
| 13 Jan | | Born | Francesco Alessandrini † | Gubbio | Bishop of Ripatransone, Italy |
| 53.4 | Ordained Bishop | Edward Dominic Fenwick, O.P. † | Bishop of Cincinnati, Ohio, USA |
| 14 Jan | | Born | Bernardinus Dal Vago, O.F.M. † | Portogruaro | Titular Archbishop of Serdica |
| 17 Jan | | Born | Louis-Joseph D’Herbomez, O.M.I. † | Brillon, France | Vicar Apostolic of British Columbia, Canada |
| 20 Jan | | Born | Sebastián Herrero y Espinosa de los Monteros, C.O. † | Jerez de la Frontera | Cardinal, Archbishop of Valencia, Spain |
| 23.5 | Ordained Priest | Nicola Rossi † | Priest | Bishop of Todi, Italy |
| 23 Jan | | Born | Johann Nepomucenus Zobl † | Schattwald | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 25 Jan | 55.3 | Selected | Leopold Maximilian von Firmian (Frimian) † | Archbishop of Wien {Vienna}, Austria |
| 26 Jan | | Born | Antoine Racine † | St-Ambroise, Jeune-Lorette | Bishop of Sherbrooke, Québec, Canada |
| 30 Jan | 67.0 | Selected | Jean-François Martin de Boisville † | Bishop of Dijon, France |
| 54.5 | Selected | Filippo Cattani † | Bishop of Carpi, Italy | Bishop of Reggio Emilia, Italy |
| Born | Pedro Nolasco Colomer y Mestres † | Girona | Bishop of Vic, Spain |
| 31 Jan | 70.4 | Died | Marie-Jean-Philippe Dubourg † | Bishop of Limoges, France |
| 2 Feb | 65.7 | Died | Louis-Jules-François-Joseph d’Andigné de Mayneuf † | Bishop of Nantes, France |
| Ordained Bishop | Basilios Elias Khalil, B.S. † | Bishop of Saïda (Melkite Greek), Lebanon |
| Born | Biagio Sibilia † | Anagni | Bishop of Segni, Italy |
| 58.6 | Selected | Luigi Tosi † | Bishop of Pavia, Italy |
| 3 Feb | 54.0 | Ordained Bishop | Antonio Posada Rubín de Celis † | Bishop of Cartagena (en España) | Patriarch of West Indies, Spain |
| 4 Feb | 61.3 | Died | Ignazio Greco † | Bishop of Oppido Mamertina, Italy |
| 5 Feb | 51.9 | Selected | Grzegorz Tomasz Ziegler, O.S.B. † | Bishop of Tarnów, Poland | Bishop of Linz, Austria |
| 8 Feb | | Born | Sebastiano Galeati † | Imola | Cardinal, Archbishop of Ravenna, Italy |
| 10 Feb | 25.7 | Ordained Priest | João d’Aguiar † | Priest | Bishop Emeritus of Bragança e Miranda, Portugal |
| 24.9 | Ordained Deacon | Manoel de Monte Rodrigues de Araújo † | Deacon | Bishop of São Sebastião do Rio de Janeiro, Brazil |
| 13 Feb | 33.1 | Appointed | Joseph Rosati, C.M. † | Titular Bishop of Tanagra | Bishop of Saint Louis, Missouri, USA |
| 16 Feb | | Born | Pietro Garga † | Cesara | Auxiliary Bishop of Novara, Italy |
| 17 Feb | 24.9 | Ordained Priest | Manoel de Monte Rodrigues de Araújo † | Priest | Bishop of São Sebastião do Rio de Janeiro, Brazil |
| 20 Feb | 73.3 | Died | Lipót Perlaki Somogy † | Bishop of Szombathely, Hungary |
| 21 Feb | | Born | Luigi Barbato Pasca di Magliano † | Napoli | Bishop of Alife, Italy |
| 22 Feb | 42.8 | Appointed | Patrick Kelly † | Bishop of Waterford and Lismore, Ireland |
| 53.2 | Appointed | Ambrose Maréchal, P.S.S. † | Apostolic Administrator of Richmond, Virginia, USA | Archbishop of Baltimore, Maryland, USA |
| 61.5 | Selected | Joseph-Michel-Jean-Baptiste-Paul-Augustin Micolon de Guérines † | Bishop of Nantes, France |
| 45.7 | Selected | Giacomo Monico † | Bishop of Ceneda, Italy | Cardinal, Patriarch of Venezia {Venice}, Italy |
| 56.0 | Selected | Jean-Paul-Gaston de Pins † | Bishop of Limoges, France | Apostolic Administrator Emeritus of Lyon (-Vienne), France |
| 24 Feb | 88.9 | Died | Emilio Gentile † | Bishop of Alife, Italy |
| 25 Feb | 67.2 | Selected | Narciso Coll y Prat † | Archbishop (Personal Title) of Palencia, Spain | Bishop |
| 1 Mar | | Born | Isidoro Valls y Pascual † | Sallent | Bishop of Gerona, Spain |
| 2 Mar | 22.7 | Ordained Priest | Luigi Natoli † | Priest | Archbishop of Messina, Italy |
| 3 Mar | 68.8 | Died | Michele Belli † | Titular Archbishop of Nazianzus |
| 5 Mar | 77.4 | Died | Marc-Marie de Bombelles † | Bishop of Amiens, France |
| 6 Mar | | Born | Thomas Patrick Roger Foley † | Baltimore | Coadjutor Bishop of Chicago, Illinois, USA |
| 8 Mar | 56.9 | Selected | Ignacy Wincenty Stanislaw Mathy (Matthy) † | Bishop of Chelmno (Culma, Kulm), Poland |
| 72.9 | Resigned | Francesco Antonio Nanni, C.M. † | Bishop of Teramo, Italy | Bishop Emeritus |
| 9 Mar | | Born | Francisco Melitón Vargas y Gutiérrez † | Ahualulco | Bishop of Tlaxcala, México |
| 71.3 | Died | Andreas Wołłowicz † | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 13 Mar | 85.7 | Died | Carlo Pellegrini † | Bishop Emeritus of Nicastro, Italy |
| 14 Mar | 48.9 | Selected | Francesco-Maria Coppola † | Bishop of Oppido Mamertina, Italy |
| 19 Mar | 71.6 | Died | Francesco Luigi Fontana, B. † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 23 Mar | 22.9 | Ordained Priest | Giacomo Bernardi † | Priest | Bishop of Massa Carrara, Italy |
| 64.8 | Appointed | Ercole Consalvi † | Pro-Prefect of the Congregation for Propagation of the Faith | Cardinal, Prefect |
| 24.0 | Ordained Priest | Nicola Sterlini † | Priest | Bishop of Calvi e Teano, Italy |
| 24.1 | Ordained Priest | Carmelo Valenti, C.SS.R. † | Priest of Congregation of the Most Holy Redeemer | Bishop of Mazara del Vallo, Italy |
| 26 Mar | | Born | Charles-Bonaventure-François Theuret † | Vars, France | Bishop of Monaco |
| 2 Apr | | Born | Francesco Gašparić † | Zagabria | Titular Bishop of Castoria |
| 5 Apr | | Born | Giuseppe Salandri, O.F.M. Conv. † | Loreto | Titular Bishop of Marcopolis |
| 6 Apr | 60.0 | Died | Isidoro Domínguez, C.R.M. † | Archbishop of Santafé en Nueva Granada, Colombia |
| 44.2 | Ordained Priest | Alessandro Giustiniani † | Priest | Cardinal, Official of the Roman Curia - Other |
| 26.9 | Ordained Priest | Peter-Josef de Preux † | Priest of Sion {Sitten}, Switzerland | Bishop |
| 9 Apr | 47.7 | Died | Francesco Leonini † | Bishop of Urbania-Sant’Angelo in Vado, Italy |
| 10 Apr | 65.9 | Selected | Jean-Pierre de Gallien de Chabons † | Bishop of Amiens, France | Bishop Emeritus |
| 12 Apr | 76.9 | Died | Carlo Benigni † | Bishop of Terni, Italy |
| 13 Apr | | Born | Salvatore Luigi Zola, C.R.L. † | Pozzuoli | Bishop of Lecce, Italy |
| 14 Apr | 57.8 | Died | Antoni Luboradzki † | Auxiliary Bishop of Płock, Poland |
| 16 Apr | 87.0 | Died | Francisco de Lemos de Faria Pereira Coutinho † | Bishop of Coimbra, Portugal |
| 18 Apr | 39.4 | Selected | Giuseppe Grasser † | Bishop of Treviso, Italy | Bishop of Verona, Italy |
| 19 Apr | 67.3 | Confirmed | Jean-François Martin de Boisville † | Bishop of Dijon, France |
| 74.8 | Confirmed | Giovanni Battista Bolognese † | Bishop of Andria, Italy |
| 60.7 | Confirmed | Giuseppe Maria Botticelli, O.F.M. † | Bishop of Gallipoli, Italy | Bishop of Lacedonia, Italy |
| 72.2 | Confirmed | Claude-Jean-Joseph Brulley de La Brunière † | Bishop of Mende, France |
| 50.8 | Appointed | Antonio Maria Cadolini, B. † | Bishop of Cesena, Italy | Cardinal, Bishop of Ancona e Numana, Italy |
| 54.7 | Confirmed | Filippo Cattani † | Bishop of Carpi, Italy | Bishop of Reggio Emilia, Italy |
| 65.3 | Confirmed | Carlo-Maria Cernelli † | Archbishop of Chieti, Italy |
| 49.0 | Confirmed | Francesco-Maria Coppola † | Bishop of Oppido Mamertina, Italy |
| 67.4 | Confirmed | Narciso Coll y Prat † | Bishop of Palencia, Spain |
| 60.5 | Confirmed | Giovanni De Simone, C.M. † | Bishop of Trivento, Italy | Bishop of Conversano, Italy |
| Appointed | Fortunato Maria Ercolani, C.P. † | Bishop of Civita Castellana, Orte e Gallese, Italy |
| 41.4 | Appointed | Angelo Maria Ficcarelli (Ficarelli) † | Bishop of Reggio Emilia, Italy |
| 59.2 | Confirmed | Gaetano Maria de Franci † | Archbishop of Trani e Bisceglie, Italy | Archbishop of Trani e Nazareth e Bisceglie, Italy |
| 56.9 | Appointed | Denis-Antoine-Luc de Frayssinous † | Titular Bishop of Hermopolis Maior |
| 55.5 | Confirmed | Leopold Maximilian von Firmian (Frimian) † | Archbishop of Wien {Vienna}, Austria |
| 62.5 | Appointed | Gaétan Giunta † | Titular Bishop of Chrysopolis in Arabia | Titular Archbishop of Amida |
| 44.2 | Appointed | Alessandro Giustiniani † | Titular Archbishop of Petra in Palaestina | Cardinal, Official of the Roman Curia - Other |
| 85.3 | Appointed | Kasimir Johann Baptist von Häffelin † | Cardinal, Cardinal-Priest of Sant’Anastasia |
| 67.8 | Confirmed | Péter Klobusiczky † | Archbishop of Kalocsa, Hungary |
| 46.9 | Confirmed | József Kopácsy † | Bishop of Székesfehérvár (Albareale), Hungary | Archbishop of Esztergom, Hungary |
| 67.9 | Confirmed | Flórián Kovács † | Bishop of Satu Mare {Szatmár}, Romania |
| 67.2 | Appointed | Raffaele Longobardi † | Bishop of Alife, Italy | Bishop of Telese o Cerreto Sannita, Italy |
| 52.0 | Confirmed | Pietro Ignazio Marolda, C.SS.R. † | Bishop of Potenza e Marsico Nuovo, Italy | Bishop of Pozzuoli, Italy |
| 75.9 | Died | José António Pinto de Mendonça Arrais † | Bishop of Guarda, Portugal |
| 48.4 | Appointed | Gregorio Muccioli † | Titular Bishop of Agathopolis |
| 48.6 | Appointed | Giuseppe della Porta Rodiani † | Titular Archbishop of Damascus | Cardinal, Auxiliary Bishop of Roma {Rome}, Italy |
| 60.7 | Confirmed | Charles-Louis Salmon du Châtelier † | Bishop of Evreux, France |
| 56.2 | Confirmed | Francisco de São Luiz (Manoel Justiniano) Saraiva, O.S.B. † | Bishop of Coimbra, Portugal | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 73.2 | Died | Franz Xaver von Salm-Reifferscheidt-Krautheim † | Cardinal, Bishop of Gurk, Austria |
| 58.4 | Confirmed | József Vurum † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania | Bishop of Nitra, Slovakia |
| 52.1 | Confirmed | Grzegorz Tomasz Ziegler, O.S.B. † | Bishop of Tarnów, Poland | Bishop of Linz, Austria |
| 51.0 | Appointed | Faustino Zucchini † | Titular Archbishop of Laodicea in Phrygia |
| 21 Apr | 50.8 | Ordained Bishop | Antonio Maria Cadolini, B. † | Bishop of Cesena, Italy | Cardinal, Bishop of Ancona e Numana, Italy |
| 65.3 | Ordained Bishop | Carlo-Maria Cernelli † | Archbishop of Chieti, Italy |
| 49.0 | Ordained Bishop | Francesco-Maria Coppola † | Bishop of Oppido Mamertina, Italy |
| 60.5 | Ordained Bishop | Giovanni De Simone, C.M. † | Bishop of Trivento, Italy | Bishop of Conversano, Italy |
| 41.4 | Ordained Bishop | Angelo Maria Ficcarelli (Ficarelli) † | Bishop of Reggio Emilia, Italy |
| 59.2 | Ordained Bishop | Gaetano Maria de Franci † | Archbishop of Trani e Bisceglie, Italy | Archbishop of Trani e Nazareth e Bisceglie, Italy |
| 44.2 | Ordained Bishop | Alessandro Giustiniani † | Titular Archbishop of Petra in Palaestina | Cardinal, Official of the Roman Curia - Other |
| Born | Jean-Joseph Marchal † | Raon l'Étape | Archbishop of Bourges, France |
| 52.0 | Ordained Bishop | Pietro Ignazio Marolda, C.SS.R. † | Bishop of Potenza e Marsico Nuovo, Italy | Bishop of Pozzuoli, Italy |
| 48.4 | Ordained Bishop | Gregorio Muccioli † | Titular Bishop of Agathopolis |
| 48.6 | Ordained Bishop | Giuseppe della Porta Rodiani † | Titular Archbishop of Damascus | Cardinal, Auxiliary Bishop of Roma {Rome}, Italy |
| 70.0 | Selected | Claude-François de Thiollaz † | Bishop of Annecy, France |
| 51.0 | Ordained Bishop | Faustino Zucchini † | Titular Archbishop of Laodicea in Phrygia |
| 26 Apr | 44.2 | Appointed | Alessandro Giustiniani † | Apostolic Nuncio to Other | Cardinal, Official of the Roman Curia - Other |
| 27 Apr | | Born | John Joseph Williams † | Boston | Archbishop of Boston, Massachusetts, USA |
| 4 May | | Born | Cassien-Léonard de Peretti † | Levie | Auxiliary Bishop of Ajaccio, France |
| 6 May | | Born | Désiré-Joseph Dennel † | Mons-en-Pévèle | Bishop of Arras (-Boulogne-Saint-Omer), France |
| 12 May | 35.3 | Ordained Bishop | Joseph Norbert Provencher † | Titular Bishop of Iuliopolis | Bishop of Saint-Boniface, Manitoba, Canada |
| 15 May | 62.6 | Ordained Bishop | Gaétan Giunta † | Titular Bishop of Chrysopolis in Arabia | Titular Archbishop of Amida |
| 22 May | 52.5 | Selected | Vincentius Ramos y García † | Bishop of Segorbe, Spain | Former Bishop-Elect |
| 24 May | 23.5 | Ordained Priest | Lodewijk-Jozef Delebecque † | Priest | Bishop of Gent {Ghent, Gand}, Belgium |
| 1 Jun | 24.1 | Ordained Priest | Charles-François Baillargeon † | Priest of Québec, Canada | Archbishop |
| 23.2 | Ordained Priest | Antonio Boscarini † | Priest | Bishop of Urbania-Sant’Angelo in Vado, Italy |
| 23.4 | Ordained Priest | Juan Hilario Bosset (Boset) † | Priest | Bishop of Mérida, Venezuela |
| 23.1 | Ordained Priest | Niccola Clarelli Parracciani † | Priest | Cardinal, Secretary of the Roman Curia - Other |
| 22.7 | Ordained Priest | Ferdinando Matteo Maurizio Bruno di Tournafort † | Priest | Bishop of Fossano, Italy |
| 24.3 | Ordained Priest | Philippe-Olympe Gerbet † | Priest | Bishop of Perpignan-Elne, France |
| 26.2 | Ordained Priest | Jean-Joseph-Marie-Eugène de Jerphanion † | Priest | Archbishop of Albi, France |
| 65.0 | Died | Vasco José a Domina Nostra de Bona Morte Lobo, C.R.S.A. † | Prelate Emeritus of Mozambico, Mozambique |
| 26.4 | Ordained Priest | Jacques-Marie-Adrien-Césaire Mathieu † | Priest | Cardinal, Archbishop of Besançon, France |
| 34.3 | Ordained Priest | Louis-François-Auguste de Rohan-Chabot † | Priest | Cardinal, Archbishop of Besançon, France |
| 23.8 | Ordained Priest | Louis-Antoine de Salinis † | Priest of Paris, France | Archbishop of Auch, France |
| 26.1 | Ordained Priest | Jean Sarrabeyrouse (Sarebayrouze) † | Priest | Auxiliary Bishop of Ajaccio, France |
| 2 Jun | 72.3 | Ordained Bishop | Claude-Jean-Joseph Brulley de La Brunière † | Bishop of Mende, France |
| 60.8 | Ordained Bishop | Charles-Louis Salmon du Châtelier † | Bishop of Evreux, France |
| 5 Jun | | Born | Giovanni Battista Mantovano, O.M. † | Fuscaldo | Coadjutor Bishop Emeritus of Bova, Italy |
| 6 Jun | 55.7 | Installed | Leopold Maximilian von Firmian (Frimian) † | Archbishop of Wien {Vienna}, Austria |
| 11 Jun | 57.1 | Ordained Bishop | Denis-Antoine-Luc de Frayssinous † | Titular Bishop of Hermopolis Maior |
| 16 Jun | 47.0 | Ordained Bishop | József Kopácsy † | Bishop of Székesfehérvár (Albareale), Hungary | Archbishop of Esztergom, Hungary |
| 20 Jun | | Born | Leone Korkoruni † | Perkinik | Bishop of Melitene (Malatia) (Armenian), Syria |
| 21 Jun | | Born | Antonio Luis Jordá y Soler † | Gerona | Bishop of Vic, Spain |
| 24 Jun | 21.0 | Professed | Ruggero Blundo, O.S.B. † | Member of Order of Saint Benedict | Bishop of Cefalù, Italy |
| 26 Jun | 71.1 | Died | Andrea Mastai-Ferretti † | Bishop of Pesaro, Italy |
| 27 Jun | | Born | Efrem Estateos Tocmagi † | Edesse | Bishop Emeritus of Karput (Armenian), Turkey |
| 29 Jun | 52.3 | Ordained Bishop | Grzegorz Tomasz Ziegler, O.S.B. † | Bishop of Tarnów, Poland | Bishop of Linz, Austria |
| 30 Jun | | Born | Ernest Maria Müller † | Irritz, Czech Republic | Bishop of Linz, Austria |