| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 55.4 | Died | Agostino Adriani † | Bishop of Mottola (Motula), Italy |
| 86.7 | Died | Josephus Aluffi † | Bishop Emeritus of Bagnoregio (Bagnorea), Italy |
| Born | Demetrio Antachi † | Aleppo | Bishop of Alep [Beroea, Halab] (Melkite Greek), Syria |
| 24.0 | Ordained Priest | Luigi Maria Blancis da Ciriè, O.F.M. † | Priest of Order of Friars Minor | Bishop of Syros (e Milos), Greece |
| 64.0 | Died | Louis-Henri de Bruyère de Chalabre † | Bishop of Saint-Pons-de-Thomières, France |
| Born | George Joseph Plunkett Browne † | | Bishop of Elphin, Ireland |
| 25.7 | Ordained Priest | Dionisio Castaño y Bermúdez † | Priest | Bishop of Gerona, Spain |
| 48.8 | Ordained Bishop | Rafael de Castello de Vide, O.F.M. † | Bishop of São Tomé e Príncipe |
| 75.4 | Died | Gian Leonardo Maria Di Fusco, O.P. † | Bishop of Acerra, Italy |
| 57.6 | Appointed | Franz Egon von Fürstenberg † | Vicar Apostolic of Nordic Missions, Germany | Bishop of Hildesheim, Germany |
| Born | Juan de la Cruz Gómez y Plata † | San Gil | Bishop of Antioquía, Colombia |
| Born | Antonio Halagi † | Ancira | Bishop Emeritus of Artuin degli Armeni (Armenian), Turkey |
| Died | Jérémie Arsène Karamé † | Bishop of Damas (Melkite Greek), Syria |
| 24.0 | Ordained Priest | Edward Kernan † | Priest | Bishop of Clogher, Ireland |
| 68.0 | Died | Giovanni Logorezzi † | Bishop of Sapë, Albania |
| 80.0 | Died | Nicolas de La Pinte de Livry, O. Praem. † | Titular Bishop of Callinicum |
| 59.0 | Appointed | Agapios III Matar † | Bishop of Saïda (Melkite Greek), Lebanon | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 39.7 | Resigned | Charles Montault des Isles † | Bishop of Foreign Diocese | Bishop of Angers, France |
| 45.8 | Appointed | Franz Xaver von Neveu † | Apostolic Administrator of Besançon, France | Bishop of Basel, Switzerland |
| 66.6 | Died | Raffaele Pasca, O.S.B. † | Bishop of Teano, Italy |
| 23.0 | Ordained Priest | José Manuel Plaza de la Tejera, O.F.M. † | Priest | Bishop of Cuenca, Ecuador |
| 69.2 | Appointed | Luigi Valenti Gonzaga † | Cardinal-Bishop of Albano | Cardinal, Librarian of the Vatican Library |
| 1 Jan | 23.4 | Ordained Priest | Ignacy Giedrojć † | Priest | Coadjutor Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 87.0 | Died | Giacinto Giustiniani, O.P. † | Bishop Emeritus of Syros (e Milos), Greece |
| 5 Jan | 54.2 | Succeeded | Joseph Christian Franz de Paula zu Hohenlohe-Waldenburg-Bartenstein † | Bishop of Wrocław (Breslau), Poland |
| 78.5 | Died | Philipp Gotthard von Schaffgotsch † | Bishop of Wrocław (Breslau), Poland |
| 6 Jan | 22.9 | Ordained Priest | Pier Francesco Brunaccini, O.S.B. † | Priest of Order of Saint Benedict | Archbishop of Monreale, Italy |
| 7 Jan | 62.7 | Died | Alfonso Marcos Llanes † | Archbishop of Sevilla {Seville}, Spain |
| 12 Jan | 78.3 | Died | Giovanni Baptista Santonini † | Titular Bishop of Famagusta |
| 15 Jan | 84.4 | Died | Antonino Ganini † | Archbishop of Santa Severina, Italy |
| 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 Emeritus of Elvas, Portugal |
| 22.8 | Ordained Priest | Michele Amatore Lobetti † | Priest | Bishop of Asti, Italy |
| 29 Jan | 69.0 | Died | Ferdinand-Marie de Lobkowitz † | Bishop of Gent {Ghent, Gand}, Belgium |
| 31 Jan | | Born | Gabriele Ferretti † | Ancona | Cardinal, Secretary Emeritus of the Secretariat of State |
| 1 Feb | 18.6 | Ordained Priest | Antonio Burbano, O.S.A. † | Priest of Order of St. Augustine | Auxiliary Bishop of Popayán, Colombia |
| Born | Patrick Phelan, P.S.S. † | Ballyragget, Ireland | Bishop of Kingston, Ontario, Canada |
| 12 Feb | | Born | Mariano Marsico † | Latronici | Bishop of San Marco e Bisignano, Italy |
| 14 Feb | 64.4 | Died | Franz Ludwig von Erthal † | Bishop of Würzburg, Germany |
| 15 Feb | 62.4 | Ordained Bishop | Pedro Nolasco Mora Mora, O. de M. † | Bishop of Solsona, Spain |
| 16 Feb | 54.2 | Died | Antonio Siciliani † | Bishop of Aquino e Pontecorvo, Italy |
| 18 Feb | 55.8 | Died | Filippo Campanelli † | Cardinal, Cardinal-Deacon of San 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 (e Velletri) |
| 76.7 | Appointed | Hyacinthe-Sigismond Gerdil, B. † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 28 Feb | 22.9 | Ordained Priest | Domenico Narni Mancinelli † | Priest | Bishop of Caserta, Italy |
| 22.7 | Ordained Priest | Antonio Podestá † | Priest | Bishop of Saluzzo, Italy |
| 3 Mar | 52.4 | Died | Dominique de Lastic † | Bishop of (Saint-Lizier de) Couserans, France |
| 12 Mar | 46.1 | Selected | Georg Karl Ignaz 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 |
| 19 Mar | | Born | Niccola Golia † | Cosenza | Bishop of Cariati, Italy |
| 43.4 | Ordained Bishop | Feliks Łukasz Lewiński † | Titular Bishop of Erythrae | Bishop of Janów Podlaski (Podlaska o Janów), Poland |
| 21 Mar | 22.8 | Ordained Priest | Francesco Tassinari † | Priest | Bishop of Urbania-Sant’Angelo in Vado, Italy |
| 24.2 | Ordained Priest | Carolus von Aulock † | Priest | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 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 von Waldenstein-Wartenberg † | Priest of Salzburg, Austria | Bishop of Seckau, Austria |
| 27 Mar | | Died | Franz Kalatay † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 3 Apr | | Born | James Oliver Van de Velde, S.J. † | Lebbeke, Belgium | Bishop of Natchez, Mississippi, USA |
| 4 Apr | 22.3 | Ordained Deacon | Giovanni Giuseppe Cappellari † | Deacon | Bishop of Vicenza, Italy |
| 6 Apr | | Born | Francesco Bronzuoli † | Firenze | Bishop of Fiesole, Italy |
| 7 Apr | | Born | Ignaz Feigerle † | Biskupstwo (Mähren) | Bishop of Sankt Pölten, Austria |
| 22.3 | Ordained Deacon | František Lajčák, O.F.M. Cap. † | Deacon | Bishop Emeritus of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 12 Apr | | Born | Adalbert Lidmansky † | Neuhaus, Czech Republic | Bishop of Gurk, Austria |
| 13 Apr | 60.2 | Selected | Ignacy Błażej Franciszek Krasicki † | Archbishop of Gniezno, Poland |
| 61.6 | Died | Julius Caesar Zollio † | Titular Archbishop of Athenae |
| 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 Nicaragua | Bishop of Guadalajara, Jalisco, México |
| 20 Apr | | Born | Johannes Nepomuk von der Marwitz † | Tuchlin | Bishop of Chelmno (Culma, Kulm), Poland |
| 24 Apr | 47.3 | Succeeded | Charles Berington † | Vicar Apostolic of Midland District, England, Great Britain |
| 67.8 | 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 † | Anchet | Bishop of Sion {Sitten}, Switzerland |
| 8 May | 57.1 | Died | Joachim-François-Mamert de Conzié † | Archbishop of Tours, France |
| 12 May | | Born | Giovanni Niccolò Tanari (Tanara) † | Bologna | Titular Patriarch of Antiochia {Antioch} |
| 15 May | | Born | Sigismondo Deáky † | Himód | Auxiliary Bishop of Győr (Raab), Hungary |
| 63.2 | Appointed | Wenzel Kobaltz † | Prefect of Meißen (Meissen) {Lusazia o Lausitz; Sassonia}, Germany |
| 17 May | 85.4 | Died | Michael Fadel † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 19 May | | Born | Mellon de Jolly † | Sézanne | Archbishop Emeritus of Sens (-Auxerre), France |
| Appointed | Athanasius Saraff † | Titular Bishop of Theodosiopolis in Armenia |
| 20 May | | Born | Francis Murphy † | Navan, Ireland | Bishop of Adelaide, Australia |
| Born | Józef Maksymilian Staniewski, O.P. † | Rosienie | Auxiliary Bishop of Mohilev, Belarus |
| 24 May | 22.9 | Ordained Deacon | Jan Cywiński † | Deacon | Auxiliary Bishop of Vilnius, Lithuania |
| 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 |
| 30 May | 32.2 | Ordained Priest | Antonio Maria Odescalchi † | Priest | Bishop of Jesi, Italy |
| 24.1 | Ordained Priest | Faustino Zucchini † | Priest | Titular Archbishop of Laodicea in Phrygia |
| 31 May | 22.4 | Ordained Deacon | Bonifaz Kaspar von Urban † | Deacon of Order of St. Augustine | Archbishop of Bamberg, Germany |
| 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 |
| 49.6 | Appointed | Theodorus Lauretanus Balbi † | Bishop of Novigrad (Cittanova), Croatia |
| 42.6 | Appointed | Giovanni Martino Bernardoni Baccolo † | Titular Bishop of Famagusta |
| 70.4 | Confirmed | Christoph Franz von Buseck † | Bishop of Bamberg, Germany |
| 66.5 | Appointed | Francisco Javier Cabrera Velasco † | Bishop of Orihuela, Spain | Bishop of Avila, Spain |
| 45.5 | Appointed | Václav (Wenzel) Léopold von Chlumčansky † | Auxiliary Bishop of Praha {Prague}, Czech Republic | Archbishop |
| 45.5 | Appointed | Václav (Wenzel) Léopold von Chlumčansky † | Titular Bishop of Cydonia (Agia, Canea) | 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 Santa 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 Droste zu Vischering † | Auxiliary Bishop of Münster, Germany | Bishop |
| 24.9 | Appointed | Kaspar Max Droste zu Vischering † | Titular Bishop of Ierichus | Bishop of Münster, Germany |
| 46.3 | Confirmed | Georg Karl Ignaz von Fechenbach zu Laudenbach † | Bishop of Würzburg, Germany |
| 44.9 | Appointed | Joaquim Ferreira de Carvalho † | Bishop of São Luís do Maranhão, Brazil |
| 58.3 | Appointed | Nicola Francesco Franchi † | Titular Bishop of Tremithus | Bishop of Penne e Atri, Italy |
| 54.8 | Appointed | Joannes Petrus Galzigna † | Bishop of Arbe (Rab), Croatia |
| 51.1 | Appointed | Bonaventura (Domenico Giuseppe) Gazzola, O.F.M. † | Bishop of Cervia, Italy | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 54.1 | Appointed | Saverio Granata, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 30.5 | Appointed | Karl Klemens von Gruben † | Auxiliary Bishop of Osnabrück, Germany | Bishop of Hildesheim, Germany |
| 30.5 | Appointed | Karl Klemens von Gruben † | Titular Bishop of Paros | Bishop of Hildesheim, Germany |
| 38.4 | Appointed | Adam Korwin Kossakowski † | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 38.4 | Appointed | Adam Korwin Kossakowski † | Titular Bishop of Limyra | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 52.9 | Appointed | Clemens Llocer † | Bishop of Ibiza, Spain |
| 40.3 | Confirmed | Ferdinand Hermann Maria von Lüninck † | Bishop of Corvey, Germany | Bishop of Münster, Germany |
| 47.6 | Appointed | Rafael de Múzquiz y Aldunate † | Titular Archbishop of Seleucia in Isauria | Archbishop of Santiago de Compostela, Spain |
| 53.9 | Appointed | Vicente Navas, O.P. † | Bishop of Comayagua, Honduras |
| 32.2 | Appointed | Antonio Maria Odescalchi † | Titular Archbishop of Iconium | Bishop of Jesi, Italy |
| 59.4 | Appointed | David Pilchowski † | Auxiliary Bishop of Vilnius, Lithuania |
| 59.4 | Appointed | David Pilchowski † | Titular Bishop of Echinus | Auxiliary Bishop of Vilnius, Lithuania |
| 60.1 | Appointed | Joannes Antonius Pinelli † | Bishop of Trogir (Traù), Croatia | Bishop Emeritus |
| 58.7 | Appointed | Franz von Raigesfeld, S.J. † | Auxiliary Bishop of Ljubljana, Slovenia |
| 58.7 | Appointed | Franz 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 (Domenico Giuseppe) Gazzola, O.F.M. † | Bishop of Cervia, Italy | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 54.1 | Ordained Bishop | Saverio Granata, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 32.2 | Ordained Bishop | Antonio Maria Odescalchi † | Titular Archbishop of Iconium | Bishop of Jesi, Italy |
| 8 Jun | 76.4 | Died | Giovanni Coccoli † | Bishop of Vulturara e Montecorvino, Italy |
| 14 Jun | 55.5 | Selected | Philippe Gemayel † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon | Bishop |
| 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 | 65.7 | Appointed | Stefano Domenico Sceriman, O.P. † | Bishop of Chioggia, Italy |
| 21 Jun | 46.3 | Ordained Bishop | Georg Karl Ignaz von Fechenbach zu Laudenbach † | Bishop of Würzburg, Germany |
| 60.2 | Ordained Bishop | Joannes Antonius Pinelli † | Bishop of Trogir (Traù), Croatia | Bishop Emeritus |
| 23 Jun | | Born | Giovanni Brunelli † | Rome | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 24 Jun | | Ordained Bishop | Athanasius Saraff † | Titular Bishop of Theodosiopolis in Armenia |
| 26 Jun | | Born | Antonio Gava † | San Giacomo di Veglia | Bishop Emeritus of Belluno e Feltre, Italy |
| 51.0 | Appointed | Vinzenz Joseph Franz Sales 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, Canada |
| Appointed | Edward Dillon † | Apostolic Administrator of Kilfenora, Ireland | Archbishop of Tuam, Ireland |
| Succeeded | Edward Dillon † | Bishop of Kilmacduagh, Ireland | Archbishop of Tuam, Ireland |
| 22.8 | Ordained Priest | Mariano Baldassare Medici, O.P. † | Priest of Order of Friars Preachers | Bishop of Cervia, Italy |
| 69.5 | Died | Laurence Nihill, S.J. † | Bishop of Kilfenora, Ireland |
| 30 Jun | 50.3 | Installed | Antonio Despuig y Dameto † | Archbishop of Valencia, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |