| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 79.0 | Died | Charles-Prudent de Becdelièvre † | Bishop of Nîmes, France |
| 74.0 | Died | Joseph-Amédée de Broglie † | Bishop of Angoulême, France |
| 27.3 | Ordained Priest | Jerónimo Castellón y Salas † | Priest | Bishop of Tarazona, Spain |
| Died | Marcus Dobrebich, O.F.M. † | Titular Bishop of Erythrae |
| Died | Gedeon Horbacki † | Coadjutor Bishop of Kyiv-Halyč {Kiev} (Ruthenian), Ukraine |
| 22.8 | Ordained Priest | Jean-Baptist-Marie-Anne-Antoine de Latil † | Priest | Cardinal, Archbishop of Reims, France |
| Born | Robert Logan † | | Bishop of Meath, Ireland |
| 29.2 | Ordained Priest | Jean-François-Marie Le Pappe de Trévern † | Priest | Bishop of Strasbourg, France |
| 58.0 | Ordained Bishop | Laurence Nihill, S.J. † | Bishop of Kilfenora, Ireland |
| 24.4 | Ordained Priest | Jean-Marie-Dominique de Poulpiquet de Brescanvel † | Priest | Bishop of Quimper, France |
| 34.9 | Confirmed | Franz Xaver von Salm-Reifferscheidt-Krautheim † | Cardinal, Bishop of Gurk, Austria |
| Born | Michael Slattery † | Tipperary | Archbishop of Cashel (-Emly), Ireland |
| 23.8 | Ordained Priest | Youssef Tian (Tyen) † | Priest | Patriarch Emeritus of Antiochia {Antioch} (Maronite), Lebanon |
| 23.3 | Ordained Priest | Samuel Vulcan † | Priest | Bishop of Oradea Mare {Gran Varadino} (Romanian), Romania |
| Jan | 82.4 | Died | Juan José García Alvaro † | Bishop of Coria, Spain |
| 5 Jan | | Born | Antonio Mantecón y Ibáñez † | Oaxaca | Bishop of Antequera, Oaxaca, México |
| 7 Jan | | Born | Louis-Jean-Julien Robiou de la Tréhonnais † | Combourg | Bishop Emeritus of Coutances, France |
| Born | Gennaro Saladino † | Napoli | Bishop of Isernia e Venafro, Italy |
| 11 Jan | 43.7 | Ordained Bishop | Charles-Eutrope de La Laurancie † | Bishop of Nantes, France |
| 44.0 | Ordained Bishop | Etienne-Joseph de Pavée de Villevieille † | Bishop of Bayonne, France |
| 22.9 | Ordained Priest | José Maria de Santana e Noronha, O.S.P.P.E. † | Priest of Order of Saint Paul the First Hermit | Bishop of Bragança e Miranda, Portugal |
| 14 Jan | 60.6 | Died | Tomaz da Encarnação da Costa e Lima, C.R.S.A. † | Bishop of Olinda, Brazil |
| 15 Jan | | Born | George Hilary Brown † | Clifton | Bishop of Liverpool, England, Great Britain |
| 17 Jan | | Born | Giovanni Antonio Gianotti (Giannotti) † | Torino | Bishop of Saluzzo, Italy |
| 19 Jan | | Born | José Sebastian Goyeneche y Barreda † | Arequipa | Archbishop of Lima, Peru |
| 23 Jan | 53.0 | Died | Guillaume-Joseph d’Abzac de Mayac † | Bishop of Saint-Papoul, France |
| 71.4 | Died | Carlo Vittorio Amedeo delle Lanze † | Cardinal, Prefect of the Congregation of the Council |
| 25 Jan | 23.6 | Ordained Priest | Antonio Begni † | Priest | Bishop of Montefeltro, Italy |
| 26 Jan | | Born | Pawel Straszyński † | Krasnystaw | Bishop of Sejny o Sejna o Augustów, Poland |
| 28 Jan | 80.2 | Died | Gaspar Afonso da Costa Brandão † | Bishop of Funchal, Portugal |
| 88.1 | Died | Francesco Maria Piccolomini † | Bishop Emeritus of Pienza, Italy |
| 30 Jan | 57.4 | Died | Jacques-Thomas-Joseph Wellens † | Bishop of Antwerpen {Antwerp, Anvers}, Belgium |
| 1 Feb | 44.8 | Ordained Bishop | Francisco Casto Royo † | Titular Archbishop of Amida |
| 26.3 | Ordained Bishop | Lorenzo Gómez Haedo † | Bishop of Segorbe, Spain |
| 62.6 | Ordained Bishop | Antonio Andrés López Arroyo, O.F.M. † | Bishop of Astorga, Spain |
| 40.2 | Selected | Jean-Baptiste-Marie de Maillé de la Tour-Landry † | Bishop of Saint-Papoul, France | Bishop of Rennes, France |
| 8 Feb | 48.6 | Ordained Bishop | Jan Benisławski † | Titular Archbishop of Gadara | Coadjutor Archbishop of Mohilev, Belarus |
| 23.0 | Ordained Priest | Polycarp Marciejewski, O.P. † | Priest of Order of Friars Preachers | Auxiliary Bishop of Sejny o Sejna o Augustów, Poland |
| 41.1 | Ordained Bishop | Charles-François-Joseph Pisani de La Gaude † | Bishop of Vence, France | Bishop of Namur {Namen}, Belgium |
| 53.3 | Ordained Bishop | Jerónimo María Torres † | Bishop of Lérida, Spain |
| 14 Feb | 44.1 | Appointed | Vincenzo Manni † | Bishop of Tivoli, Italy |
| 18 Feb | 79.0 | Died | Fabian Franziszek Pląskowski † | Auxiliary Bishop of Chelmno (Culma, Kulm), Poland |
| 20 Feb | 44.1 | Ordained Bishop | Vincenzo Manni † | Bishop of Tivoli, Italy |
| 22 Feb | | Born | Rodolfo Brignole Sale † | Genova | Titular Bishop of Assuras |
| 23 Feb | 35.2 | Selected | Louis-François de Bausset-Roquefort † | Bishop of Alès (Alais), France | Cardinal, Bishop Emeritus |
| 52.3 | Selected | François Mouchet de Villedieu † | Bishop of Digne, France | Bishop Emeritus |
| 29 Feb | 64.5 | Died | Andrea Spana † | Bishop of Segni, Italy |
| Mar | 66.4 | Died | Giovanni Antonio Arras Minutili † | Bishop of Ampurias e Civita, Italy |
| 4 Mar | 77.4 | Died | Francesco Antonio Attaffi † | Bishop of Nicotera, Italy |
| 6 Mar | 29.3 | Ordained Priest | Narciso Coll y Prat † | Priest | Bishop of Palencia, Spain |
| 24.3 | Ordained Priest | Francesco Saverio Durini, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Aversa, Italy |
| 24.0 | Ordained Priest | Lodovico de Gallo, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Archbishop of Santa Severina, Italy |
| 24.1 | Ordained Priest | Angelico Méstria, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Bishop of Ugento, Italy |
| 7 Mar | 23.0 | Ordained Priest | Francesco Toli † | Priest | Bishop of Pistoia e Prato, Italy |
| 14 Mar | 67.0 | Ordained Bishop | Joaquim Xavier Botelho de Lima † | Archbishop of Évora, Portugal |
| 49.9 | Ordained Bishop | Francisco Veyán y Mola † | Bishop of Vic, Spain |
| 21 Mar | 83.5 | Died | Jean-Gilles du Coêtlosquet † | Bishop Emeritus of Limoges, France |
| 23 Mar | 74.7 | Died | Giovanni Carlo Bandi † | Cardinal, Bishop of Imola, Italy |
| 25 Mar | | Born | Luigi Laterza † | Cassano | Bishop of Crotone (Cotrone), Italy |
| 27 Mar | 24.2 | Ordained Priest | Domenico Benedetto Balsamo, O.S.B. † | Priest of Order of Saint Benedict | Archbishop of Monreale, Italy |
| 34.2 | Ordained Priest | Claude-Jean-Joseph Brulley de La Brunière † | Priest | Bishop of Mende, France |
| 29 Mar | | Born | Francesco Maria Icheri di Malabaila † | Braida | Bishop of Casale Monferrato, Italy |
| 30 Mar | 37.7 | Appointed | Jean Labartette, M.E.P. † | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viet Nam | Vicar Apostolic |
| 37.7 | Appointed | Jean Labartette, M.E.P. † | Titular Bishop of Vera | Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 40.3 | Appointed | Luigi Maria di Gesu Pianazzi, O.C.D. † | Vicar Apostolic of Malabar, India |
| 40.3 | Appointed | Luigi Maria di Gesu Pianazzi, O.C.D. † | Titular Bishop of Usula | Vicar Apostolic of Malabar, India |
| 36.5 | Appointed | Michal Mateusz Stadnicki, O.S.B.M. † | Coadjutor Bishop of Foreign Diocese | Bishop |
| 1 Apr | 79.1 | Died | Salvatore Andreani, B. † | Bishop of Lodi, Italy |
| 15 Apr | 75.9 | Died | Max Friedrich von Königsegg und Rothenfels † | Archbishop of Köln {Cologne}, Germany |
| 27.4 | Succeeded | Max Franz (Maximilian Franciscus) von Habsburg-Lothringen (Österreich) † | Archbishop of Köln {Cologne}, Germany |
| 27.4 | Succeeded | Max Franz (Maximilian Franciscus) von Habsburg-Lothringen (Österreich) † | Bishop of Münster, Germany | Archbishop of Köln {Cologne}, Germany |
| 17 Apr | 78.3 | Died | Juan Luengo Pinto † | Bishop of Calahorra y La Calzada, Spain |
| 18 Apr | 50.3 | Ordained Bishop | Iraklij Listovskyj † | Bishop of Foreign Diocese |
| 21 Apr | | Born | Manuel Anselmo Nafría † | Torre de Blacos | Bishop of Coria, Spain |
| 23 Apr | | Born | Jorge Benavente Macoaga † | Ayata | Archbishop of Lima, Peru |
| 30 Apr | 64.8 | Died | Franz Karl von Velbrück † | Bishop of Liège, Belgium |
| 2 May | 23.1 | Ordained Priest | Emmanuel ab Incarnatione Sobrinho, O.S.P.P.E. † | Priest of Order of Saint Paul the First Hermit | Titular Bishop of Nemesi |
| 7 May | | Appointed | Augustin Occhich, O.F.M. † | Vicar Apostolic of Bosniae Othomanae, Croatia |
| Appointed | Augustin Occhich, O.F.M. † | Titular Bishop of Trapezopolis | Vicar Apostolic of Bosniae Othomanae, Croatia |
| 17 May | 47.4 | Appointed | James Louis O’Donel, O.F.M. † | Prefect of Newfoundland, Canada | Vicar Apostolic Emeritus of Newfoundland, Canada |
| 18 May | | Born | Ivan (Jan) Snihurskyj (Snigurski) † | Brzesciany | Bishop of Przemyśl, Sambor, et Sanok (Ruthenian), Poland |
| 20 May | 30.9 | Ordained Deacon | Jan Pavel Woronicz † | Deacon of Society of Jesus | Archbishop of Warszawa {Warsaw}, Poland |
| 23 May | | Born | Giovanni Battista de Albertis † | Genova | Bishop Emeritus of Ventimiglia, Italy |
| 26 May | 39.5 | Ordained Priest | Ferdinando Maria Saluzzo † | Priest | Cardinal, Official of the Roman Curia - Other |
| 4 Jun | 25.2 | Ordained Priest | Carlos da Cunha e Menezes † | Priest | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 5 Jun | 30.9 | Ordained Priest | Jan Pavel Woronicz † | Priest of Society of Jesus | Archbishop of Warszawa {Warsaw}, Poland |
| 6 Jun | 44.6 | Ordained Bishop | Ioan (Janos) Bob (Babb) † | Bishop of Făgăraş (Romanian), Romania |
| 26.1 | Ordained Priest | Andrés García Palomares † | Priest | Bishop of Albarracin, Spain |
| 7 Jun | | Born | Ludovico Rizzuti † | Bocchigliero | Archbishop of Lanciano (e Ortona), Italy |
| 9 Jun | 49.4 | Appointed | John Carroll † | Prefect of United States of America | Archbishop of Baltimore, Maryland, USA |
| 13 Jun | 41.4 | Ordained Bishop | Jean-Didier de Saint Martin, M.E.P. † | Bishop of Corada | Vicar Apostolic of Se-Ciuen (Setchoan), China |
| 20 Jun | 52.5 | Resigned | Jean-Baptiste-Charles-Marie de Beauvais † | Bishop of Senez, France | Bishop Emeritus |
| 68.0 | Resigned | Pierre-Paul du Quaylar (Caylar) † | Bishop of Digne, France | Bishop Emeritus |
| 21 Jun | | Born | Rosario Vincenzo Benza † | Santa Caterina | Bishop of Nicosia, Italy |
| 22 Jun | 50.2 | Resigned | Antonio Sentmanat y Castellá † | Bishop of Avila, Spain | Cardinal, Patriarch of West Indies, Spain |
| 25 Jun | 53.6 | Resigned | Leonardo Antonelli † | Prefect of the Congregation for Propagation of the Faith | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 50.4 | Confirmed | Joseph Franz Anton von Auersperg † | Cardinal, Bishop of Passau, Germany |
| 35.5 | Confirmed | Louis-François de Bausset-Roquefort † | Bishop of Alès (Alais), France | Cardinal, Bishop Emeritus |
| 37.2 | Appointed | José Carrión y Marfil † | Auxiliary Bishop of Santafé en Nueva Granada, Colombia | Bishop Emeritus of Trujillo, Peru |
| 37.2 | Appointed | José Carrión y Marfil † | Titular Bishop of Carystus | Bishop Emeritus of Trujillo, Peru |
| 36.4 | Confirmed | Jean-Joseph-Victor de Castellane-Adhémar † | Bishop of Senez, France |
| 50.5 | Appointed | Pierre-Marie-Madeleine Cortois de Balore † | Bishop of Nîmes, France | Bishop Emeritus |
| 59.9 | Appointed | Marcantonio Colonna (Jr.) † | Cardinal-Priest of San Lorenzo in Lucina | Cardinal, Cardinal-Bishop of Palestrina |
| 42.5 | Appointed | Philippe-François d’Albignac de Castelnau † | Bishop of Angoulême, France |
| 46.2 | Appointed | Francisco Ramón Larumbre † | Bishop of Tudela, Spain |
| 40.6 | Confirmed | Jean-Baptiste-Marie de Maillé de la Tour-Landry † | Bishop of Saint-Papoul, France | Bishop of Rennes, France |
| 40.6 | Appointed | Rafael Tomás Menéndez Luarca y Queipo de Llano † | Bishop of Santander, Spain |
| 52.6 | Confirmed | François Mouchet de Villedieu † | Bishop of Digne, France | Bishop Emeritus |
| 52.3 | Appointed | Giulio Pignatelli, O.S.B. † | Archbishop of Salerno, Italy |
| 68.7 | Appointed | Mercuriale Prati, O.S.B. † | Bishop of Forli, Italy |
| Appointed | Juan Ruiz de San Agustín, O.A.R. † | Bishop of Nueva Segovia, Philippines |
| 39.6 | Appointed | Ferdinando Maria Saluzzo † | Titular Archbishop of Teodosia | Cardinal, Official of the Roman Curia - Other |
| 59.8 | Installed | Francisco Antonio de San Miguel Iglesia Cajiga, O.S.H. † | Bishop of Michoacán, México |
| 50.2 | Appointed | Antonio Sentmanat y Castellá † | Cardinal, Patriarch of West Indies, Spain |
| 53.0 | Appointed | Francisco Antonio Pablo Sieni Flannings, O.F.M. Cap. † | Auxiliary Bishop of Santiago de Cuba | Auxiliary Bishop Emeritus of San Cristobal de la Habana, Cuba |
| 53.0 | Appointed | Francisco Antonio Pablo Sieni Flannings, O.F.M. Cap. † | Titular Bishop of Tricale | Auxiliary Bishop Emeritus of San Cristobal de la Habana, Cuba |
| 72.2 | Appointed | Giorgio Stassi † | Titular Bishop of Lampsacus |
| 62.1 | Appointed | Felipe José de Tres-Palacios y Verdeja † | Bishop of Puerto Rico (Porto Rico) | Bishop of San Cristobal de la Habana, Cuba |
| 50.5 | Appointed | Henri-François de La Broue de Vareilles † | Bishop of Gap, France | Bishop Emeritus |
| 62.8 | Appointed | Filippo Maria Visconti † | Archbishop of Milano {Milan}, Italy |
| 35.7 | Appointed | Karl Friedrich von Wendt † | Auxiliary Bishop of Hildesheim, Germany |
| 35.7 | Appointed | Karl Friedrich von Wendt † | Titular Bishop of Basilinopolis | Auxiliary Bishop of Hildesheim, Germany |
| 26 Jun | 64.1 | Appointed | Juan García Ruiz, O.S.A. † | Bishop of Nueva Caceres, Philippines |
| 27 Jun | 68.7 | Ordained Bishop | Mercuriale Prati, O.S.B. † | Bishop of Forli, Italy |
| 62.9 | Ordained Bishop | Filippo Maria Visconti † | Archbishop of Milano {Milan}, Italy |