| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 49.7 | Ordained Bishop | Antonio Macarulla Minguilla de Aguilain † | Bishop of Comayagua, Honduras | Bishop of Durango, México |
| 24.0 | Ordained Priest | James Murphy † | Priest | Bishop of Clogher, Ireland |
| Born | Adam Michal Prażmowski † | Kosnin | Bishop of Płock, Poland |
| Born | Karol Skórkowski † | Jankowice | Bishop of Kraków, Poland |
| 17.9 | Professed | Johann Nepomuk von Dankesreither † | Member of Order of Saint Benedict | Bishop of Sankt Pölten, Austria |
| Jan | 72.0 | Died | Gian Pietro Solaro † | Bishop of Vercelli, Italy |
| 5 Jan | | Born | Ignazio Giuseppe Nicola Epifanio Montemagno, O.F.M. Conv. † | Caltagirone | Bishop of Agrigento (Girgenti), Italy |
| 12 Jan | 66.6 | Died | Johann Philipp von Walderdorff † | Archbishop of Trier, Germany |
| 13 Jan | 80.5 | Died | Josephus Simon Assemani † | Titular Archbishop of Tyrus |
| 18 Jan | | Born | Luiz de Castro Pereira, C.S.J. † | Porto | Prelate of Cuiabá, Brazil |
| 25 Jan | 54.0 | Appointed | Giuseppe Maria Contesini † | Titular Archbishop of Athenae |
| 45.4 | Appointed | Agostino Felice de’ Rossi † | Bishop of Terni, Italy |
| 56.7 | Appointed | Alessandro Galletti † | Coadjutor Bishop of Volterra, Italy | Bishop |
| 56.7 | Appointed | Alessandro Galletti † | Titular Bishop of Soli | Bishop of Volterra, Italy |
| 65.2 | Appointed | Tommaso Mazza † | Bishop of Castellammare di Stabia, Italy |
| 47.0 | Appointed | Giovanni Giacomo Onorati † | Bishop of Teano, Italy | Bishop of Troia, Italy |
| 58.3 | Appointed | Eugenio Benedetto Scaramuccia † | Bishop of San Severo, Italy |
| 65.3 | Appointed | Michal Witosławski † | Auxiliary Bishop of Przemyśl, Poland |
| 65.3 | Appointed | Michal Witosławski † | Titular Bishop of Coronea | Auxiliary Bishop of Przemyśl, Poland |
| 27 Jan | 36.0 | Appointed | János Bradács, O.S.B.M. † | Vicar Apostolic of Mukachevo (Munkács) (Ruthenian), Ukraine | Bishop |
| 36.0 | Appointed | János Bradács, O.S.B.M. † | Titular Bishop of Rhosus | Bishop of Mukachevo (Munkács) (Ruthenian), Ukraine |
| 28 Jan | | Born | Jean-Louis Anne Madelain Lefebvre de Cheverus † | Mayenne, France | Cardinal, Archbishop of Bordeaux, France |
| 75.6 | Died | Gherardo Antonio Volpe † | Bishop of Nocera de’ Pagani, Italy |
| 29 Jan | | Born | Francisco de Sales Arrieta Ortiz, O.F.M. † | Lima | Archbishop of Lima, Peru |
| 31 Jan | 54.0 | Ordained Bishop | Giuseppe Maria Contesini † | Titular Archbishop of Athenae |
| 45.4 | Ordained Bishop | Agostino Felice de’ Rossi † | Bishop of Terni, Italy |
| 56.7 | Ordained Bishop | Alessandro Galletti † | Titular Bishop of Soli | Bishop of Volterra, Italy |
| 47.0 | Ordained Bishop | Giovanni Giacomo Onorati † | Bishop of Teano, Italy | Bishop of Troia, Italy |
| Born | Giuseppe Saitta † | Bronte | Bishop of Patti, Italy |
| 2 Feb | 74.5 | Died | Nicola Brescia † | Bishop of San Marco (Argentano), Italy |
| 35.2 | Solemn Professed | Martin Takáts † | Priest of Society of Jesus | Auxiliary Bishop of Kalocsa, Hungary |
| 6 Feb | 85.1 | Died | Jean-Baptiste de Champflour † | Bishop of Mirepoix, France |
| 10 Feb | 28.4 | Selected | Klemens Wenzeslaus von Sachsen † | Archbishop of Trier, Germany | Bishop of Augsburg, Germany |
| 11 Feb | | Born | Antonio Posada Rubín de Celis † | Soto de Agues, Spain | Patriarch of West Indies, Spain |
| 13 Feb | | Born | José Caetano da Silva Coutinho † | Caldas de Rainha, Portugal | Bishop of São Sebastião do Rio de Janeiro, Brazil |
| 14 Feb | 34.2 | Ordained Bishop | Jean-Arnauld de Castellane † | Bishop of Mende, France |
| 34.1 | Ordained Bishop | Jean-Louis d’Usson de Bonac † | Bishop of Agen, France | Bishop Emeritus |
| 19 Feb | 38.1 | Died | Cesare Alberico Lucini † | Titular Archbishop of Nicaea | Apostolic Nuncio to Spain |
| 26 Feb | 67.8 | Resigned | Isidoro Cossío Bustamente † | Bishop of Valladolid, Spain | Bishop Emeritus |
| 27 Feb | 22.2 | Ordained Deacon | Matthäus Georg von Chandelle † | Deacon of Mainz, Germany | Bishop of Speyer, Germany |
| 23.2 | Ordained Priest | Giovanni Filippo Ferrone † | Priest | Bishop of Muro Lucano, Italy |
| 46.3 | Ordained Priest | Marcantonio Marcolini † | Priest | Cardinal, Cardinal-Priest of Sant’Onofrio |
| 24.0 | Ordained Priest | Alessandro Mattei † | Priest | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 22.9 | Ordained Priest | Salvatore Maria Pignattaro, O.P. † | Priest | Bishop of Isernia, Italy |
| 22.9 | Ordained Priest | Lorenzo Villani † | Priest | Bishop of Monopoli, Italy |
| 28 Feb | | Born | Godehard Joseph Osthaus † | Hildesheim | Bishop of Hildesheim, Germany |
| 58.4 | Ordained Bishop | Eugenio Benedetto Scaramuccia † | Bishop of San Severo, Italy |
| 29 Feb | 69.4 | Died | Ignazio Michele Crivelli † | Cardinal, Titular Archbishop of Caesarea in Cappadocia |
| Mar | 76.7 | Died | Giovanni Battista Chiappé, O.S.H. † | Bishop of Nocera Umbra, Italy |
| Born | Józef Marcelin Dzięcielski † | Tehórzów | Bishop of Lublin, Poland |
| 46.1 | Ordained Bishop | Krysztof Hilary Szembek † | Titular Bishop of Verinopolis | Bishop of Płock, Poland |
| 1 Mar | 60.3 | Selected | Emmerich Joseph von Breidbach zu Bürresheim † | Bishop of Worms, Germany | Archbishop of Mainz, Germany |
| 65.7 | Died | Teodor Kazimierz Czartoryski † | Bishop of Poznań, Poland |
| 5 Mar | 77.8 | Died | João da Madre de Deus Seixas da Fonseca Borges, O.S.B. † | Titular Bishop of Areopolis |
| 11 Mar | 55.4 | Appointed | Manuel Rubín Celis † | Bishop of Valladolid, Spain | Bishop of Cartagena (en España) |
| 14 Mar | 35.3 | Appointed | Francesco Luserna Rorengo di Rorà † | Archbishop of Torino {Turin}, Italy |
| 28.5 | Confirmed | Klemens Wenzeslaus von Sachsen † | Archbishop of Trier, Germany | Bishop of Augsburg, Germany |
| 50.0 | Appointed | José Maria Sisto e Brito, C.R. † | Bishop of Sora, Italy |
| 59.2 | Appointed | Antonio Vigliarolo † | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 59.2 | Appointed | Antonio Vigliarolo † | Titular Bishop of Orthosias in Caria | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 15 Mar | | Born | Giuseppe Saverio Poli † | Molfetta | Bishop of Anglona-Tursi, Italy |
| 20 Mar | 51.6 | Ordained Bishop | Rafael Lasala Locela, O.S.A. † | Titular Bishop of Adramyttium | Bishop of Solsona, Spain |
| 48.8 | Ordained Deacon | Domenico Orsini d’Aragona † | Deacon | Cardinal, Cardinal-Deacon of Santa Maria in Via Lata |
| 23.1 | Ordained Priest | Johannes Antonius de Ricci † | Priest of Ljubljana, Slovenia | Auxiliary Bishop |
| 59.2 | Ordained Bishop | Antonio Vigliarolo † | Titular Bishop of Orthosias in Caria | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 21 Mar | | Born | Antônio Rodrigues de Aguiar † | Rio de Janeiro | Prelate of Goiás, Brazil |
| 25 Mar | 50.1 | Ordained Bishop | José Maria Sisto e Brito, C.R. † | Bishop of Sora, Italy |
| 2 Apr | 24.7 | Ordained Priest | Marcello Maria Benci † | Priest | Bishop of Colle di Val d’Elsa, Italy |
| 26.5 | Ordained Priest | Franz Karl Maria Cajetan von Firmian † | Priest of Passau, Germany | Auxiliary Bishop |
| 3 Apr | 59.7 | Resigned | Franz Karl Joseph von Fugger-Glött † | Auxiliary Bishop of Konstanz {Constance}, Germany | Auxiliary Bishop Emeritus |
| 7 Apr | 60.3 | Died | Miguel Cilieza y Velasco † | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 12 Apr | | Born | José Francisco da Soledade Bravo † | Serpa | Bishop of Portalegre, Portugal |
| 15 Apr | 70.2 | Died | Petrus Antonius Raimondi † | Bishop of Capaccio, Italy |
| 17 Apr | 39.4 | Ordained Priest | Gennaro Clemente Francone † | Priest | Bishop of Troia, Italy |
| 18 Apr | | Born | Daniel Murray † | Sheepwalk | Archbishop of Dublin, Ireland |
| 20 Apr | 36.2 | Ordained Bishop | János Bradács, O.S.B.M. † | Titular Bishop of Rhosus | Bishop of Mukachevo (Munkács) (Ruthenian), Ukraine |
| 23 Apr | 42.7 | Died | Nicola Sanchez de Luna † | Bishop of Nola, Italy |
| 24 Apr | 65.6 | Ordained Bishop | Michal Witosławski † | Titular Bishop of Coronea | Auxiliary Bishop of Przemyśl, Poland |
| 1 May | 23.6 | Ordained Priest | Francesco Antonio Grillo, O.F.M. Conv. † | Priest of Order of Friars Minor Conventual | Bishop of Cassano all’Jonio, Italy |
| 8 May | | Born | Pierre-Marie Cottret † | Argenteuil | Bishop of Beauvais, France |
| 16 May | 60.5 | Confirmed | Emmerich Joseph von Breidbach zu Bürresheim † | Bishop of Worms, Germany | Archbishop of Mainz, Germany |
| 36.8 | Appointed | Benedetto Maria dei Monti Sanfelice, O.S.B. † | Bishop of Nocera de’ Pagani, Italy |
| 42.8 | Appointed | Santiago José Echaverría Nieto de Osorio y Elguera † | Auxiliary Bishop of Santiago de Cuba | Bishop of Tlaxcala, México |
| 42.8 | Appointed | Santiago José Echaverría Nieto de Osorio y Elguera † | Titular Bishop of Tricomia | Bishop of Tlaxcala, México |
| 37.9 | Appointed | Johann Nepomuk Augustin von Hornstein zu Hohenstoffen † | Auxiliary Bishop of Konstanz {Constance}, Germany | Auxiliary Bishop Emeritus |
| 37.9 | Appointed | Johann Nepomuk Augustin von Hornstein zu Hohenstoffen † | Titular Bishop of Epiphania in Syria | Auxiliary Bishop Emeritus of Konstanz {Constance}, Germany |
| 62.1 | Appointed | Józef Tadeusz Kierski † | Bishop of Przemyśl, Poland |
| 40.0 | Appointed | Filippo López y Rojo, C.R. † | Bishop of Nola, Italy | Archbishop Emeritus of Palermo, Italy |
| 50.5 | Appointed | Andrzej Mikołaj Stanisław Kostka Młodziejewski † | Bishop of Poznań, Poland |
| 46.7 | Appointed | Giovanni Battista Quasina † | Bishop of Bosa, Italy |
| 50.9 | Appointed | Domenico Russo † | Bishop of Potenza, Italy | Bishop of Monopoli, Italy |
| 42.1 | Appointed | Angelo Maria Zuccari † | Bishop of Capaccio, Italy |
| 22 May | 36.8 | Ordained Bishop | Benedetto Maria dei Monti Sanfelice, O.S.B. † | Bishop of Nocera de’ Pagani, Italy |
| 40.0 | Ordained Bishop | Filippo López y Rojo, C.R. † | Bishop of Nola, Italy | Archbishop Emeritus of Palermo, Italy |
| 50.9 | Ordained Bishop | Domenico Russo † | Bishop of Potenza, Italy | Bishop of Monopoli, Italy |
| 42.1 | Ordained Bishop | Angelo Maria Zuccari † | Bishop of Capaccio, Italy |
| 26 May | | Born | Antal Juranitz † | Kaposvár | Bishop of Győr (Raab), Hungary |
| 28 May | 23.4 | Ordained Priest | Enrico Capece Minutolo, C.O. † | Priest of Confederation of Oratorians of St. Philip Neri | Bishop of Mileto, Italy |
| 23.8 | Ordained Priest | Ferenc Fuchs † | Priest | Archbishop of Eger, Hungary |
| 29 May | 64.4 | Ordained Bishop | William Maire † | Titular Bishop of Cinna | Coadjutor Vicar Apostolic of Northern District, England, Great Britain |
| 1 Jun | 46.4 | Appointed | José Tormo Juliá † | Bishop of Orihuela, Spain |
| 2 Jun | | Born | François-Antoine Arbaud † | Manosque | Bishop of Gap, France |
| 7 Jun | 55.2 | Died | José Patricio de la Cuesta Velarde † | Bishop of Sigüenza, Spain |
| 17 Jun | 58.5 | Died | Giacomo Cingari † | Bishop of Gubbio, Italy |
| Born | Leonardo Santander y Villavicencio † | Sevilla | Bishop of Astorga, Spain |
| 18 Jun | | Born | Etienne Blanquet de Rouville † | Marvejols | Auxiliary Bishop of Reims, France |
| 19 Jun | | Born | Peter de Ürményi † | Nagysztricze | Auxiliary Bishop of Esztergom, Hungary |
| 20 Jun | 33.0 | Appointed | Luigi Amici † | Bishop of Camerino, Italy | Archbishop of Camerino, Italy |
| 33.0 | Appointed | Luigi Amici † | Bishop of Fabriano, Italy | Archbishop of Camerino, Italy |
| 50.0 | Appointed | Francisco Armañá Font, O.S.A. † | Bishop of Lugo, Spain | Archbishop of Tarragona, Spain |
| 52.5 | Appointed | François-Tristan de Cambon † | Bishop of Mirepoix, France |
| 33.0 | Confirmed | François-Joseph-Emmanuel de Crussol d’Uzès d’Amboise † | Bishop of La Rochelle, France |
| 55.8 | Appointed | Juan Lorenzo Irigoyen Dutari † | Bishop of Pamplona, Spain |
| 43.0 | Appointed | Baldassare de Moncada † | Bishop of San Marco (Argentano), Italy |
| 48.6 | Installed | Lazzaro Opiziio Pallavicino † | Cardinal-Priest of Santi Nereo ed Achilleo | Cardinal, Secretary of the Secretariat of State |
| 24 Jun | 33.0 | Ordained Bishop | Luigi Amici † | Bishop of Camerino, Italy | Archbishop of Camerino, Italy |
| 23.0 | Ordained Priest | Sigismund Ernst von Hohenwart, O.S.A. † | Priest of Order of St. Augustine | Bishop of Linz, Austria |
| 23.8 | Ordained Priest | Michael Mdzewski † | Priest | Auxiliary Bishop of Płock, Poland |
| 43.0 | Ordained Bishop | Baldassare de Moncada † | Bishop of San Marco (Argentano), Italy |
| 25 Jun | 61.3 | Appointed | Juan Sáenz de Bururaga † | Archbishop of Zaragoza, Spain |
| 26 Jun | 55.3 | Ordained Bishop | Sebastiano Canepa † | Bishop of Nicopoli, Bulgaria |
| 55.7 | Ordained Bishop | Manuel Rubín Celis † | Bishop of Valladolid, Spain | Bishop of Cartagena (en España) |
| 29 Jun | 67.5 | Died | Enrichetto Virginio (Raffale Francesco) Natta, O.P. † | Cardinal, Bishop of Alba (Pompea), Italy |