| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Appointed | Bernardo Bernardino Beltrão † | Bishop of Pinhel, Portugal |
| 54.3 | Appointed | Giuseppe Bolognese † | Bishop of Marsi, Italy | Bishop Emeritus |
| 41.3 | Appointed | Cesare Brancadoro † | Secretary of the Congregation for Propagation of the Faith | Cardinal, Archbishop of Fermo, Italy |
| 79.7 | Died | Bonaventura Calcagnini † | Bishop of Penne-Atri, Italy |
| Appointed | Vincenzo Castro † | Bishop of Castellaneta, Italy |
| Appointed | Rocco Coiro † | Bishop of Crotone (Cotrone), Italy |
| Appointed | Agostino Colaianni † | Bishop of Sora, Italy |
| 86.3 | Died | Giovan Battista Coppola † | Bishop of Cassano all’Jonio, Italy |
| Born | Giovanni Corti † | Pomerio | Bishop of Mantova, Italy |
| 61.0 | Appointed | Bernardo Maria della Torre † | Bishop of Lettere-Gragnano, Italy | Bishop of Castellammare di Stabia, Italy |
| 29.6 | Ordained Priest | Pierre-Michel-Marie Double † | Priest | Bishop of Tarbes, France |
| 68.1 | Resigned | Gennaro Clemente Francone † | Bishop of Gaeta, Italy | Bishop Emeritus |
| 40.2 | Appointed | Paolo Garzilli † | Bishop of Marsico Nuovo, Italy | Bishop of Sessa Aurunca, Italy |
| Died | Francesco Saverio de Irivo † | Bishop of Nusco, Italy |
| Appointed | Ludovico Ludovici (Ludovico), O.F.M. † | Bishop of Policastro, Italy |
| 16.2 | Professed | Franz Laurenz Mauermann, O.S.B. † | Member of Order of Saint Benedict | Vicar Apostolic of Foreign Diocese |
| 50.6 | Appointed | José António Pinto de Mendonça Arrais † | Bishop of Guarda, Portugal |
| 22.0 | Ordained Priest | Ramón Ignacio Méndez † | Priest | Archbishop of Caracas, Santiago de Venezuela |
| 22.3 | Ordained Priest | Giuseppe Gasparo Mezzofanti † | Priest | Cardinal, Cardinal-Priest of S. Onofrio |
| 27.4 | Ordained Priest | Johann Theodor van der Noot † | Priest of Trier, Germany | Vicar Apostolic Emeritus of Luxembourg |
| Appointed | Carlo Pellegrini † | Bishop of Nicastro, Italy |
| Born | Basilio Popovies † | Komjath | Bishop of Mukacheve (Ruthenian), Ukraine |
| 67.1 | Died | Giuseppe Domenico Porqueddu † | Bishop of Iglesias, Italy |
| Appointed | Mattia Santoro † | Bishop of Polignano (Polinianum), Italy |
| Born | James Sharples † | | Coadjutor Vicar Apostolic of Lancashire District, England, Great Britain |
| 84.3 | Died | Michele Tafuri † | Bishop of Cava, Italy |
| Born | Giuseppe Twarowski † | Brzemich | Auxiliary Bishop of Podlachia o Janów, Poland |
| 47.9 | Appointed | Nicola Vecchi † | Bishop of Teano, Italy |
| 18 Jan | | Born | Juan Alfonso Albuquerque Berión † | Aguilas | Bishop of Córdoba, Spain |
| 21 Jan | | Born | Auguste Allou (Alloux) † | Provins | Bishop of Meaux, France |
| 8 Feb | 80.4 | Died | Alfonso Solís Grajera, O.S. † | Bishop of Badajoz, Spain |
| 11 Feb | | Born | Antonio Herrán y Zaldúa † | Honda | Archbishop of Santafé en Nueva Granada, Colombia |
| 41.0 | Appointed | Lorenzo Litta † | Apostolic Nuncio to Russian Federation | Cardinal, Official of the Roman Curia - Other |
| 12 Feb | | Born | John Timon, C.M. † | Conewago, PA | Bishop of Buffalo, New York, USA |
| 14 Feb | | Appointed | Marcello Cortenovis, B. † | Vicar Apostolic of Ava e Pegù, Myanmar |
| Appointed | Marcello Cortenovis, B. † | Titular Bishop of Sebastopolis in Armenia | Vicar Apostolic of Ava e Pegù, Myanmar |
| Appointed | Luigi Grondona, B. † | Titular Bishop of Calydon |
| 15 Feb | | Born | Etienne Jean François Le Herpeur † | Bayeux, France | Bishop of Martinique (Fort-de-France e Saint Pierre), Martinique, Antilles |
| 19 Feb | 76.2 | Died | Jerónimo Rogado de Carvalhal e Silva † | Bishop of Guarda, Portugal |
| 22 Feb | 80.1 | Died | Joseph-Dominique de Cheylus † | Bishop of Bayeux, France |
| 26 Feb | 75.9 | Died | Damian August Philipp Karl Reichsgraf von Limburg-Styrum † | Bishop of Speyer, Germany |
| 1 Mar | 73.8 | Died | Franz de Paula Xaver Ludwig Jakob Fürst von Breuner † | Bishop of Chiemsee, Germany |
| 10 Mar | 65.4 | Appointed | Carlo Luigi Buronzo del Signore † | Apostolic Administrator of Torino {Turin}, Italy | Archbishop Emeritus |
| 15 Mar | 65.5 | Resigned | Ignazio Busca † | Secretary of the Secretariat of State | Cardinal, Chamberlain (Camerlengo) of the College of Cardinals |
| 19 Mar | | Born | Jean-Baptiste Boucho, M.E.P. † | Athos-Aspis, France | Vicar Apostolic of Malacca-Singapore |
| 23 Mar | 71.1 | Died | Francisco Cuadrillero Mota † | Bishop of Mondoñedo, Spain |
| Born | Manoel de Monte Rodrigues de Araújo † | Recife | Bishop of São Sebastião do Rio de Janeiro, Brazil |
| 28 Mar | | Born | Annibale-Raffaele Montalcini, C.SS.R. † | Crotone | Archbishop of Santa Severina, Italy |
| 1 Apr | 25.1 | Ordained Priest | Thomas Penswick † | Priest | Vicar Apostolic of Northern District, England, Great Britain |
| 42.6 | Appointed | Sigmund Christoph Graf von Waldburg-Zeil-Trauchburg † | Bishop of Chiemsee, Germany | Bishop Emeritus |
| 3 Apr | 68.8 | Died | Juan Francisco Armada Araujo † | Bishop of Huesca, Spain |
| 7 Apr | 42.6 | Ordained Bishop | Sigmund Christoph Graf von Waldburg-Zeil-Trauchburg † | Bishop of Chiemsee, Germany | Bishop Emeritus |
| 8 Apr | 75.7 | Died | Salvatore Ventimiglia, C.O. † | Bishop Emeritus of Catania, Italy |
| 15 Apr | 23.1 | Ordained Priest | Johann Wilhelm Bausch † | Priest of Trier, Germany | Bishop of Limburg, Germany |
| 23.7 | Ordained Priest | Johann Georg Bossi † | Priest of Chur, Switzerland | Bishop of Chur-Sankt Gallen, Switzerland |
| 22 Apr | 58.1 | Appointed | Philipp Franz Wilderich Nepomuk Graf von Walderdorf † | Bishop of Speyer, Germany |
| 8 May | | Born | Giacomo Luigi Brignole † | Genoa | Cardinal, Official of the Roman Curia - Other |
| 14 May | 59.0 | Resigned | Louis Charrier de La Roche † | Bishop of Foreign Diocese | Bishop of Versailles, France |
| 17 May | 68.2 | Died | Juan Antonio Gallego y Orbigo, O.F.M. † | Archbishop of Manila, Philippines |
| Jun | 79.4 | Died | François-d'Etienne de Saint-Jean de Prunières † | Bishop of Grasse, France |
| 10 Jun | 24.1 | Ordained Priest | Ugolino Carlini † | Priest | Bishop of Cortona, Italy |
| 23.1 | Ordained Priest | Johann Baptist Judas Thaddeus von Keller † | Priest of Rottenburg, Germany | Bishop |
| 13 Jun | | Born | Antoni Fijalkowski † | Lepe | Archbishop of Mohilev, Belarus |
| 16 Jun | 29.3 | Ordained Priest | Godehard Joseph Osthaus † | Priest of Hildesheim, Germany | Bishop |
| 24 Jun | 69.8 | Died | Eustaquio Azara, O.S.B. † | Bishop of Barcelona, Spain |
| Born | John Joseph Hughes † | Annaloghan, Ireland | Archbishop of New York, New York, USA |
| 26 Jun | | Born | Charles-Nicolas-Pierre Didiot † | Esnes-en-Argonne | Bishop of Bayeux (-Lisieux), France |
| 49.7 | Died | Michal Mateusz Stadnicki, O.S.B.M. † | Bishop of Foreign Diocese |
| 29 Jun | | Born | Ireneus Frederic Baraga † | Mala Vas, Austria | Bishop of Sault Sainte Marie-Marquette, Michigan, USA |