| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 23.1 | Ordained Priest | Jean-Jacques-David Bardou † | Priest of Albi, France | Bishop of Cahors, France |
| Died | Giovanni Battista Bolognese † | Bishop of Termoli, Italy |
| Born | Luigi Barbato Pasca di Magliano † | Napoli | Bishop of Alife, Italy |
| Appointed | Gaetano Maria de Franci † | Archbishop of Trani e Bisceglie, Italy | Archbishop of Trani e Nazareth e Bisceglie, Italy |
| Appointed | Giuseppe Grasser † | Bishop of Treviso, Italy | Bishop of Verona, Italy |
| 75.6 | Died | José António Pinto de Mendonça Arrais † | Bishop of Guarda, Portugal |
| 23.2 | Ordained Priest | Louis-Anne Nogret † | Priest | Bishop Emeritus of Saint-Claude, France |
| 74.2 | Died | Giuseppe Stanislao Paradiso † | Bishop of Ales e Terralba, Italy |
| Died | Mathieu Righet † | Vicar Apostolic of Alexandria {Alessandria} (Coptic), Egypt |
| 71.9 | Appointed | Jozef Schedy † | Bishop of the unknown of Titular See |
| 1 Jan | 78.8 | Installed | Johann Nepomuk Freiherr von Wolf † | Bishop of Regensburg, Germany |
| 6 Jan | 67.4 | Died | Jean-Baptiste Dubois † | Bishop of Dijon, France |
| 62.8 | Appointed | Antoine de La Grange de Pons † | Bishop of Moulins, France |
| 12 Jan | 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 | 67.0 | Appointed | Jean-François Martin de Boisville † | Bishop of Dijon, France |
| 16 Jan | 57.0 | Appointed | Jean-François de Saunhac-Belcastel † | Bishop of Perpignan-Elne, France |
| 17 Jan | | Born | Louis-Joseph D'Herbomez, O.M.I. † | Brillon, France | Vicar Apostolic of British Columbia, Canada |
| 20 Jan | | Born | Sebastián Herrero Espinosa de los Monteros † | Jerez de la Frontera | Cardinal, Archbishop of Valencia, Spain |
| 23 Jan | | Born | Johann Zobl † | Schattwald | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 25 Jan | 55.3 | Appointed | Leopold Maximilian Graf von Firmian (Frimian) † | Archbishop of Wien {Vienna}, Austria |
| 26 Jan | | Born | Antoine Racine † | St-Ambroise, Jeune-Lorette | Bishop of Sherbrooke, Québec, Canada |
| 30 Jan | | 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 |
| Born | Biagio Sibilia † | Anagni | Bishop of Segni, Italy |
| 3 Feb | 54.0 | Ordained Bishop | Antonio Posada Rubín de Celis † | Bishop of Cartagena (en España) | Patriarch of West Indies, Antilles |
| 5 Feb | 51.9 | Appointed | Gregorius Thomas Ziegler, O.S.B. † | Bishop of Tarnów, Poland | Bishop of Linz, Austria |
| 8 Feb | | Born | Sebastiano Galeati † | Imola | Cardinal, Archbishop of Ravenna, Italy |
| 9 Feb | 42.8 | Appointed | Patrick Kelly † | Bishop of Waterford and Lismore, Ireland |
| 15 Feb | | Born | Pietro Garga † | Cesara | Titular Bishop of Ierichus |
| 61.4 | Appointed | Joseph-Michel-Jean-Baptiste-Paul-Augustin Micolon de Guérines † | Bishop of Nantes, France |
| 56.0 | Appointed | Jean-Paul-Gaston de Pins † | Bishop of Limoges, France | Apostolic Administrator Emeritus of Lyon (-Vienne), France |
| 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 | Leopold Perlaki Somogy † | Bishop of Szombathely, Hungary |
| 22 Feb | 53.2 | Appointed | Ambrose Maréchal, P.S.S. † | Apostolic Administrator of Richmond, Virginia, USA | Archbishop of Baltimore, Maryland, USA |
| 24 Feb | 88.9 | Died | Emilio Gentile † | Bishop of Alife, Italy |
| 25 Feb | 67.3 | Appointed | Narciso Coll y Prat † | Archbishop (Personal Title) of Palencia, Spain | Bishop |
| 1 Mar | | Born | Isidoro Valls y Pascual † | Sallent | Bishop of Gerona, Spain |
| 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 | 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, Tlaxcala, México |
| 19 Mar | 71.6 | Died | Francesco Fontana, B. † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 26 Mar | | Born | Charles-Bonaventure-François Theuret † | Vars, France | Bishop of Monaco |
| 27 Mar | 65.9 | Appointed | Jean-Pierre de Gallien de Chabons † | Bishop of Amiens, France | Bishop Emeritus |
| Apr | 60.0 | Died | Isidoro Domínguez, C.R.M. † | Archbishop of Santafé en Nueva Granada, Colombia |
| 2 Apr | | Born | Francesco Gasparic † | Zagabria | Titular Bishop of Castoria |
| 5 Apr | | Born | Giuseppe Salandri, O.F.M. Conv. † | Loreto | Titular Bishop of Marcopolis |
| 6 Apr | 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 |
| 12 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 |
| 19 Apr | 67.3 | Confirmed | Jean-François Martin de Boisville † | Bishop of Dijon, France |
| 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 | Appointed | Filippo Cattani † | Bishop of Carpi, Italy | Bishop of Reggio Emilia, Italy |
| 67.4 | Confirmed | Narciso Coll y Prat † | Bishop of Palencia, Spain |
| 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 |
| 56.9 | Appointed | Denis-Antoine-Luc de Frayssinous † | Titular Bishop of Hermopolis Maior |
| 55.5 | Confirmed | Leopold Maximilian Graf von Firmian (Frimian) † | Archbishop of Wien {Vienna}, Austria |
| 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-Priest of S. Anastasia | Cardinal, Titular Bishop of Chersonesus in Creta |
| 67.8 | Appointed | Peter Klobusiczky † | Archbishop of Kalocsa, Hungary |
| 67.2 | Appointed | Raffaele Longobardi † | Bishop of Alife, Italy | Bishop of Telese o Cerreto Sannita, Italy |
| 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 | Appointed | Francisco de São Luiz (Manoel Justiniano) Saraiva, O.S.B. † | Bishop of Coimbra, Portugal | Cardinal, Patriarch of Lisboa, Portugal |
| 73.2 | Died | Franz Xaver Altgraf von Salm-Reifferscheidt-Krautheim † | Cardinal, Bishop of Gurk, Austria |
| 58.4 | Appointed | József Vurum † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania | Bishop of Nitra, Slovakia |
| 21 Apr | 50.8 | Ordained Bishop | Antonio Maria Cadolini, B. † | Bishop of Cesena, Italy | Cardinal, Bishop of Ancona e Numana, Italy |
| 41.4 | Ordained Bishop | Angelo Maria Ficcarelli (Ficarelli) † | Bishop of Reggio Emilia, Italy |
| 44.2 | Ordained Bishop | Alessandro Giustiniani † | Titular Archbishop of Petra in Palaestina | Cardinal, Official of the Roman Curia - Other |
| 48.6 | Ordained Bishop | Giuseppe della Porta Rodiani † | Titular Archbishop of Damascus | Cardinal, Auxiliary Bishop of Roma {Rome}, Italy |
| 70.0 | Appointed | Claude-François de Thiollaz † | Bishop of Annecy, France |
| 22 Apr | | Born | Jean-Joseph Marchal † | Raon l'Étape | Archbishop of Bourges, France |
| 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 |
| 7 May | | Born | Désiré-Joseph Dennel † | Mons-en-Pévèle | Bishop of Arras (, Boulogne, e Saint-Omer), France |
| 12 May | 35.3 | Ordained Bishop | Joseph Norbert Provencher † | Titular Bishop of Iuliopolis | Bishop of Saint-Boniface, Manitoba, Canada |
| 1 Jun | 24.1 | Ordained Priest | Charles-François Baillargeon † | Priest of Québec, Québec, Canada | Archbishop |
| 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 |
| 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 |
| 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 † | Fuscaldo | Coadjutor Bishop of Bova, Italy |
| 6 Jun | 55.7 | Installed | Leopold Maximilian Graf von Firmian (Frimian) † | Archbishop of Wien {Vienna}, Austria |
| 11 Jun | 57.1 | Ordained Bishop | Denis-Antoine-Luc de Frayssinous † | Titular Bishop of Hermopolis Maior |
| 20 Jun | | Born | Leone Korkoruni † | Perkinik | Bishop of Melitene degli Armeni |
| 21 Jun | | Born | Antonio Luis Jordá Soler † | Gerona | Bishop of Vic, Spain |
| Born | Jaime José Soler Roquer † | San Juan de las Abadesas | Bishop of Teruel, Spain |
| 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 | Gregorius Thomas 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 |