| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 55.4 | Died | Agostino Adriani † | Bishop of Mottola (Motula), Italy |
| Born | Demetrio Antachi † | Aleppo | Bishop of Alep (Melkite), Syria |
| Born | Alessandro Asinari di Sanmarzano † | Torino | Titular Archbishop of Ephesus |
| 64.0 | Died | Louis-Henri de Bruyère de Chalabre † | Bishop of Saint-Pons-de-Thomières, France |
| 74.9 | Died | Gaetano Maria Capece, C.R. † | Bishop of Pozzuoli, Italy |
| 48.8 | Ordained Bishop | Rafael de Castello de Vide, O.F.M. † | Bishop of São Tomé e Príncipe |
| Appointed | Edward Dillon † | Bishop of Kilmacduagh, Ireland | Archbishop of Tuam, Ireland |
| 57.6 | Appointed | Franz Egon Freiherr von Fürstenberg † | Vicar Apostolic of Nordic Missions, Germany | Bishop of Hildesheim, Germany |
| Died | Francesco Maria Gentili † | Bishop of Luni e Sarzana, Italy |
| Born | Giuseppe Giagia † | Bisciarre | Archbishop of Cipro (Maronite), Cyprus |
| 24.0 | Ordained Priest | Edward Kernan † | Priest | Bishop of Clogher, Ireland |
| Appointed | Vincenzo Maria Maggioli † | Bishop of Luni e Sarzana, Italy | Bishop Emeritus |
| 75.0 | Retired | Tommaso Mancini † | Bishop of Città della Pieve, Italy |
| 79.2 | Died | Prospero Celestino Meloni † | Bishop of Narni, Italy |
| 39.7 | Resigned | Charles Montault des Isles † | Bishop of Foreign Diocese | Bishop of Angers, France |
| 45.8 | Appointed | Franz Xaver Freiherr von Neveu † | Apostolic Administrator of Besançon, France | Bishop of Basel, Switzerland |
| 66.6 | Died | Raffaele Pasca, O.S.B. † | Bishop of Teano, Italy |
| 55.5 | Died | Carlo Giuseppe Pistone † | Bishop of Alessandria (della Paglia), Italy |
| Appointed | Pietro Ramazzini † | Vicar Apostolic of Bombay, India | Titular Bishop of Antiphellus |
| Appointed | Pietro Ramazzini † | Titular Bishop of Antiphellus |
| 63.0 | Died | Battista Rivelli † | Archbishop of Brindisi, Italy |
| 68.0 | Appointed | Manuel Nicolás Rojas de Argandoña † | Bishop of Santa Cruz de la Sierra, Bolivia |
| Born | Józef Maksymilian Staniewski † | | Auxiliary Bishop of Mohilev, Belarus |
| 69.2 | Appointed | Luigi Valenti Gonzaga † | Cardinal-Bishop of Albano | Cardinal, Librarian of the Vatican Library |
| 1 Jan | 23.4 | Ordained Priest | Ignacy Giedroyc † | Priest | Coadjutor Bishop of Samogizia o Tels (Zmudz), Lithuania |
| 5 Jan | 54.2 | Succeeded | Joseph Christian Franz de Paula Prinz zu Hohenlohe-Waldenburg-Bartenstein † | Bishop of Wrocław, Poland |
| 78.5 | Died | Philipp Gotthard Graf von Schaffgotsch † | Bishop of Wrocław, Poland |
| 7 Jan | 62.7 | Died | Alfonso Marcos Llanes † | Archbishop of Sevilla {Seville}, Spain |
| 18 Jan | 59.6 | Died | Andrea Corsini † | Cardinal, Cardinal-Bishop of Sabina |
| 22 Jan | 55.7 | Resigned | Miguel da Madre de Deus da Cruz, O.F.M. † | Bishop of São Paulo, Brazil | Archbishop of Braga, Portugal |
| 25 Jan | 52.4 | Ordained Bishop | José Joaquim da Cunha Azeredo Coutinho † | Bishop of Olinda, Brazil | Bishop of Elvas, Portugal |
| 31 Jan | | Born | Gabriele Ferretti † | Ancona | Cardinal, Secretary Emeritus of the Secretariat of State |
| 1 Feb | | Born | Patrick Phelan, P.S.S. † | Ballyragget, Ireland | Bishop of Kingston, Ontario, Canada |
| 14 Feb | 64.4 | Died | Franz Ludwig Reichsfreiherr von Erthal † | Bishop of Würzburg, Germany |
| 15 Feb | 62.4 | Ordained Bishop | Pedro Nolasco Mora Mora, O. de M. † | Bishop of Solsona, Spain |
| 18 Feb | 55.8 | Died | Filippo Campanelli † | Cardinal, Cardinal-Deacon of S. Cesareo in Palatio |
| 20 Feb | 65.5 | Died | Esteban Antonio Aguado Rojas † | Bishop of Pamplona, Spain |
| 22 Feb | 67.9 | Appointed | Francisco Gabriel de Olivares y Benito † | Bishop of Durango, México |
| 27 Feb | 64.3 | Appointed | Leonardo Antonelli † | Prefect of the Apostolic Signatura | Cardinal, Cardinal-Bishop of Ostia |
| 76.7 | Appointed | Hyacinthe-Sigismond Gerdil, B. † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 3 Mar | 52.4 | Died | Dominique de Lastic † | Bishop of (Saint-Lizier de) Couserans, France |
| 12 Mar | 46.1 | Appointed | Georg Karl Ignaz Freiherr von Fechenbach zu Laudenbach † | Bishop of Würzburg, Germany |
| 14 Mar | | Born | Bartolomeo Carlo Romilli † | Bergamo | Archbishop of Milano {Milan}, Italy |
| 16 Mar | 65.4 | Installed | Francisco José Marán † | Bishop of Santiago de Chile |
| 17 Mar | | Born | Wincenty Lipski † | Lozowica k. Klimowicz | Auxiliary Bishop of Tiraspol, Moldova |
| 24 Mar | | Born | Josef von Lipp † | Holzhausen | Bishop of Rottenburg, Germany |
| 25 Mar | 25.1 | Ordained Priest | Andrew Carruthers † | Priest | Vicar Apostolic of Eastern District, Scotland, Great Britain |
| 23.1 | Ordained Priest | Andrew Scott † | Priest | Vicar Apostolic Emeritus of Western District, Scotland, Great Britain |
| 38.6 | Ordained Priest | Johann Friedrich Graf von Waldenstein-Wartenberg † | Priest of Salzburg, Austria | Bishop of Seckau, Austria |
| 2 Apr | | Born | Francisco de Paul García Peláez † | Guatemala | Archbishop of Guatemala |
| 3 Apr | | Born | James Oliver Van de Velde, S.J. † | Lebbeke, Belgium | Bishop of Natchez, Mississippi, USA |
| 6 Apr | | Born | Francesco Bronzuoli † | Firenze | Bishop of Fiesole, Italy |
| 7 Apr | | Born | Ignaz Feigerle † | Biskupstwo (Mähren) | Bishop of Sankt Pölten, Austria |
| 12 Apr | | Born | Adalbert Lidmansky † | Neuhaus, Czech Republic | Bishop of Gurk, Austria |
| 13 Apr | 60.2 | Appointed | Ignacy Błażej Franciszek Krasicki † | Archbishop of Gniezno, Poland |
| 17 Apr | 48.5 | Appointed | Leonard Neale, S.J. † | Coadjutor Bishop of Baltimore, Maryland, USA | Archbishop of Baltimore, Maryland, USA |
| 48.5 | Appointed | Leonard Neale, S.J. † | Titular Bishop of Gortyna | Archbishop of Baltimore, Maryland, USA |
| 19 Apr | 43.0 | Ordained Bishop | Juan Cruz Ruiz de Cabañas y Crespo † | Bishop of León en Nicaragua | Bishop of Guadalajara, Jalisco, México |
| 20 Apr | | Born | Johannes Nepomuk von der Marwitz † | Tucheln | Bishop of Chelmno (Culma), Poland |
| 24 Apr | 47.3 | Succeeded | Charles Berington † | Vicar Apostolic of Midland District, England, Great Britain |
| 68.2 | Died | Thomas Joseph Talbot † | Vicar Apostolic of Midland District, England, Great Britain |
| 26 Apr | 46.1 | Ordained Bishop | Luis Ignatius Peñalver y Cárdenas † | Bishop of Louisiana and the Two Floridas (Saint Louis of New Orleans), USA | Archbishop Emeritus of Guatemala |
| 28 Apr | | Born | Peter-Josef de Preux † | Venthen | Bishop of Sion {Sitten}, Switzerland |
| 8 May | 57.1 | Died | Joachim-François-Mamert de Conzié † | Archbishop of Tours, France |
| 12 May | | Born | Giovanni Niccola de' Marchesi Tanara † | Bologna | Patriarch of Antiochia {Antioch}, Syria |
| 15 May | | Born | Sigismondo Deaky † | | Auxiliary Bishop of Győr, Hungary |
| 63.2 | Appointed | Wenzel Kobaltz † | Prefect of Meissen (Meißen) {Lusazia o Lausitz; Sassonia}, Germany |
| 20 May | | Born | Mellon de Jolly † | Sézanne | Archbishop Emeritus of Sens (-Auxerre), France |
| Born | Francis Murphy † | Navan, Ireland | Bishop of Adelaide, Australia |
| 27 May | 69.7 | Died | Pedro Rubio-Benedicto Herrero † | Bishop of Jaén, Spain |
| 28 May | 48.1 | Resigned | Francisco de Cuerda † | Bishop of Puerto Rico (Porto Rico) | Bishop Emeritus |
| 75.8 | Retired | Francisco Fabián y Fuero † | Archbishop of Valencia, Spain | Archbishop Emeritus |
| Jun | 69.4 | Died | Laurence Nihill, S.J. † | Bishop of Kilmacduagh, Ireland |
| 1 Jun | 63.7 | Appointed | Giovanni Andrea Archetti † | Archbishop (Personal Title) of Ascoli Piceno, Italy | Cardinal, Bishop |
| 58.8 | Appointed | Giovanni Archinto † | Cardinal, Cardinal-Bishop of Sabina |
| 51.5 | Appointed | Michele Argelati † | Auxiliary Bishop of Ostia (-Velletri), Italy | Bishop of Terracina, Priverno e Sezze, Italy |
| 51.5 | Appointed | Michele Argelati † | Titular Bishop of Hippos | Bishop of Terracina, Priverno e Sezze, Italy |
| 66.5 | Appointed | Francisco Javier Cabrera Velasco † | Bishop of Orihuela, Spain | Bishop of Avila, Spain |
| 45.5 | Appointed | Václav (Wenzel) Léopold Ritter von Chlumčansky † | Auxiliary Bishop of Praha {Prague}, Czech Republic | Archbishop |
| 45.5 | Appointed | Václav (Wenzel) Léopold Ritter von Chlumčansky † | Titular Bishop of Cydonia | Archbishop of Praha {Prague}, Czech Republic |
| 52.8 | Appointed | Mateus de Abreu Pereira † | Bishop of São Paulo, Brazil |
| 50.8 | Appointed | Giulio Maria della Somaglia † | Cardinal-Priest of S. Sabina | Cardinal, Archivist of the Vatican Secret Archives |
| 50.8 | Elevated to Cardinal | Giulio Maria della Somaglia † | Cardinal, Archivist of the Vatican Secret Archives |
| 50.2 | Confirmed | Antonio Despuig y Dameto † | Archbishop of Valencia, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |
| 24.9 | Appointed | Kaspar Max Freiherr Droste zu Vischering † | Auxiliary Bishop of Münster, Germany | Bishop |
| 24.9 | Appointed | Kaspar Max Freiherr Droste zu Vischering † | Titular Bishop of Ierichus | Bishop of Münster, Germany |
| 46.3 | Confirmed | Georg Karl Ignaz Freiherr von Fechenbach zu Laudenbach † | Bishop of Würzburg, Germany |
| 44.9 | Appointed | Joaquim Ferreira de Carvalho † | Bishop of São Luís do Maranhão, Brazil |
| 51.1 | Appointed | Bonaventura Gazola, O.F.M. † | Bishop of Cervia, Italy | Cardinal, Bishop of Montefiascone, Italy |
| Appointed | Saverio Granata, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 30.5 | Appointed | Karl Klemens Reichsfreiherr von Gruben † | Auxiliary Bishop of Osnabrück, Germany | Bishop of Hildesheim, Germany |
| 30.5 | Appointed | Karl Klemens Reichsfreiherr von Gruben † | Titular Bishop of Paros | Bishop of Hildesheim, Germany |
| 40.3 | Confirmed | Ferdinand Hermann Maria Freiherr von Lüninck † | Bishop of Corvey, Germany | Bishop of Münster, Germany |
| 47.6 | Appointed | Rafael Múzquiz Aldunate † | Archbishop of the Titular See | Archbishop of Santiago de Compostela, Spain |
| 53.9 | Appointed | Vicente Navas, O.P. † | Bishop of Comayagua, Honduras |
| 58.7 | Appointed | Franz Freiherr von Raigesfeld, S.J. † | Auxiliary Bishop of Ljubljana, Slovenia |
| 58.7 | Appointed | Franz Freiherr von Raigesfeld, S.J. † | Titular Bishop of Derbe | Auxiliary Bishop of Ljubljana, Slovenia |
| 58.7 | Appointed | Juan Bautista de Zengotita y Bengoa, O. de M. † | Bishop of Puerto Rico (Porto Rico) |
| 55.4 | Appointed | Antonio Felice Zondadari † | Cardinal, Archbishop of Siena, Italy |
| 5 Jun | | Born | Anton Ocskay † | Boliarov | Bishop of Košice, Slovakia |
| 7 Jun | 51.6 | Ordained Bishop | Michele Argelati † | Titular Bishop of Hippos | Bishop of Terracina, Priverno e Sezze, Italy |
| 51.1 | Ordained Bishop | Bonaventura Gazola, O.F.M. † | Bishop of Cervia, Italy | Cardinal, Bishop of Montefiascone, Italy |
| 16 Jun | 73.5 | Died | Domingos da Encarnação Pontevel, O.P. † | Bishop of Mariana, Brazil |
| 17 Jun | 46.2 | Installed | Luis Ignatius Peñalver y Cárdenas † | Bishop of Louisiana and the Two Floridas (Saint Louis of New Orleans), USA | Archbishop Emeritus of Guatemala |
| 20 Jun | 66.5 | Appointed | Stefano Domenico Sceriman † | Bishop of Chioggia, Italy |
| 21 Jun | 46.3 | Ordained Bishop | Georg Karl Ignaz Freiherr von Fechenbach zu Laudenbach † | Bishop of Würzburg, Germany |
| 25 Jun | | Born | Giovanni Brunelli † | Rome | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 26 Jun | 51.0 | Appointed | Vinzenz Joseph Franz Sales Graf von Schrattenbach † | Bishop of Lavant, Slovenia | Bishop of Brno, Czech Republic |
| 29 Jun | 51.9 | Ordained Bishop | Pierre Denaut † | Titular Bishop of Canatha | Bishop of Québec, Québec, Canada |
| 30 Jun | 50.3 | Installed | Antonio Despuig y Dameto † | Archbishop of Valencia, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |