| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 79.0 | Died | Martial-Louis de Beaupoil de Saint-Aulaire † | Bishop of Poitiers, France |
| Appointed | Bernardo Maria Cenicela, O.F.M. † | Archbishop of Reggio Calabria, Italy |
| 69.0 | Succeeded | Jan Dembowski † | Bishop of Kamyanets-Podilskyi, Ukraine |
| 52.3 | Installed | Remigio de La Santa y Ortega † | Bishop of La Paz, Bolivia | Bishop of Lérida, Spain |
| Died | Lourenço Correia de Sá e Benevides † | Bishop of Porto, Portugal |
| 64.0 | Died | Boetius Egan † | Archbishop of Tuam, Ireland |
| 52.8 | Ordained Bishop | Pedro Agustín Estévez y Ugarte † | Bishop of Yucatán (Mérida), Yucatán, México |
| Appointed | Gaetano Maria Garrasi, O.S.A. † | Archbishop of Messina, Italy |
| 86.0 | Died | Henri Hachette des Portes, O. Carm. † | Bishop of Glandèves, France | Auxiliary Bishop of Reims, France |
| Ordained Priest | Julius-Antoine † | Priest | Bishop Emeritus of Foreign Diocese |
| 83.7 | Resigned | Adam Stanisław Krasiński † | Bishop of Kamyanets-Podilskyi, Ukraine | Bishop Emeritus |
| 23.9 | Ordained Priest | Mihail (Mychajlo) Lewicki (Levyckyj) † | Priest | Cardinal, Archbishop of Lviv (Ukrainian), Ukraine |
| 66.0 | Ordained Bishop | Raimundo Melchor Magi Gómez, O. de M. † | Bishop of Guadix, Spain |
| 51.5 | Resigned | Jean-Siffrein Maury † | Bishop of Montefiascone, Italy | Cardinal, Bishop Emeritus |
| 48.3 | Appointed | Cyprian Odyniec † | Auxiliary Bishop of Mohilev, Belarus |
| Appointed | James O'Shaughnessy † | Coadjutor Bishop of Killaloe, Ireland | Bishop |
| 40.3 | Appointed | Michele Palmieri † | Bishop of Mottola (Motula), Italy | Bishop of Monopoli, Italy |
| Appointed | Vincenzo M. Parruco Tries † | Bishop of Bovino, Italy |
| Died | Vincenzo M. Parruco Tries † | Bishop of Bovino, Italy |
| 71.1 | Died | Luigi Trasmondi † | Archbishop of Trani, Italy |
| 30.8 | Ordained Priest | Giuseppe Maria Velzi, O.P. † | Priest of Order of Friars Preachers | Cardinal, Bishop of Montefiascone, Italy |
| Appointed | Serafino Vitale † | Bishop of Minori, Italy |
| 4 Jan | | Born | Wilhelm Arnoldi † | Badem | Bishop of Trier, Germany |
| 6 Jan | | Born | Melchior Ferdinand Joseph von Diepenbrock † | Bocholt | Cardinal, Bishop of Wrocław, Poland |
| 12 Jan | | Born | Giuseppe Maria Galligari † | Foligno | Bishop of Narni, Italy |
| 14 Jan | 85.4 | Died | Anselmo Rodríguez, O.S.B. † | Bishop of Almería, Spain |
| 29 Jan | 62.9 | Appointed | Diego Gregorio Cadello † | Cardinal, Archbishop of Cagliari, Italy |
| 64.8 | Appointed | Fabrizio Cimino, C.Ss.R. † | Bishop of Oria, Italy |
| Appointed | Alfonso Maria Freda † | Bishop of Lucera, Italy |
| 64.2 | Appointed | Giovanni Vincenzo Monforte † | Bishop of Nola, Italy | Archbishop of Napoli {Naples}, Italy |
| 2 Feb | 64.8 | Ordained Bishop | Fabrizio Cimino, C.Ss.R. † | Bishop of Oria, Italy |
| Ordained Bishop | Annibale Di Leo † | Archbishop of Brindisi, Italy |
| 40.3 | Ordained Bishop | Michele Palmieri † | Bishop of Mottola (Motula), Italy | Bishop of Monopoli, Italy |
| Ordained Bishop | Filippo Speranza † | Bishop of Guardialfiera (Guardia), Italy |
| 4 Feb | 48.5 | Ordained Bishop | Dominique Lacombe † | Bishop of Foreign Diocese | Bishop of Angoulême, France |
| 5 Feb | | Born | Philippe-Olympe Gerbet † | Poligny | Bishop of Perpignan-Elne, France |
| 6 Feb | | Born | Jean-Antoine-Marie Foulquier † | Valady | Bishop Emeritus of Mende, France |
| 9 Feb | | Appointed | Charles Sughrue † | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| 10 Feb | 50.5 | Appointed | Claude-François-Marie Primat † | Bishop of Foreign Diocese | Archbishop of Toulouse, France |
| 11 Feb | 45.6 | Ordained Bishop | Emanuel von Schimonski-Schimoni † | Titular Bishop of Lerus | Bishop of Wrocław, Poland |
| 12 Feb | | Born | Telmo Maceira † | Tuy | Bishop of Tui, Spain |
| 13 Feb | | Born | Pablo Benigno (Vicente) Carrion de Málaga, O.F.M. Cap. † | Málaga, Spain | Bishop of Puerto Rico (Porto Rico) |
| 14 Feb | 89.9 | Died | Alberto Maria Capobianco, O.P. † | Archbishop of Reggio Calabria, Italy |
| 16 Feb | | Born | Filippo Artico † | Ceneda | Bishop of Asti, Italy |
| 17 Feb | | Born | Giovanni Battista Montixi † | Cagliari | Bishop of Iglesias, Italy |
| 18 Feb | | Born | Giuseppe Maria Castellani, O.S.A. † | Roma | Titular Bishop of Porphyreon |
| 27 Feb | | Born | Fernando Argüelles Miranda † | Cabaños de Arriba | Bishop of Astorga, Spain |
| Mar | | Born | Bernardino Panzacchi † | Loiano | Bishop of Terracina, Priverno e Sezze, Italy |
| 2 Mar | | Born | Carmelo Valenti, C.SS.R. † | Marineo | Bishop of Mazara del Vallo, Italy |
| 4 Mar | | Ordained Bishop | Ramón José Arce † | Archbishop of Burgos, Spain | Patriarch Emeritus of West Indies, Antilles |
| 66.2 | Ordained Bishop | Joaquín Company Soler, O.F.M. † | Archbishop of Zaragoza, Spain | Archbishop of Valencia, Spain |
| 6 Mar | 77.1 | Ordained Bishop | Gabriel Álvarez de Faria y Sánchez Zarzosa † | Bishop of Badajoz, Spain |
| 10 Mar | | Installed | Manuel Joaquín González de Acuña y Saenz † | Bishop of Panamá |
| 11 Mar | 50.5 | Ordained Bishop | Antonio Vila Campos † | Bishop of Menorca, Spain | Bishop of Albarracin, Spain |
| 14 Mar | 52.7 | Ordained Bishop | Joaquín Sánchez Cutanda † | Bishop of Huesca, Spain |
| 16 Mar | | Born | Józef Alojzy Pukalski † | Cieszyn | Bishop of Tarnów, Poland |
| 17 Mar | | Born | Nicola Sterlini † | Girgenti | Bishop of Calvi e Teano, Italy |
| 20 Mar | 72.8 | Died | Ange-François de Talaru de Chalmazel † | Bishop of Coutances, France |
| 25 Mar | 32.8 | Ordained Bishop | José Casquete Prado, O.S. † | Titular Bishop of Cisamus |
| 53.9 | Ordained Bishop | Juan Antonio Tamayo, O.S. † | Titular Bishop of Botrys |
| 26 Mar | | Born | Pierre-Dominique-Marcellin Bonamie, SS.CC. † | Albas, France | Superior General Emeritus of Congregation of the Sacred Hearts of Jesus and Mary |
| 29 Mar | | Born | Vincenzo Rozzolino † | Naples | Bishop of Caserta, Italy |
| 31 Mar | | Born | Jacques-Marie-Joseph Baillès † | Toulouse | Bishop Emeritus of Luçon, France |
| 3 Apr | | Born | Modesto Contratto, O.F.M. Cap. † | Terra di Bagnasco | Bishop of Acqui, Italy |
| 7 Apr | 74.2 | Died | Manuel Tavares Coutinho da Silva † | Bishop of Portalegre, Portugal |
| 17 Apr | 44.2 | Appointed | Blas Joaquín Alvarez Palma † | Auxiliary Bishop of Sigüenza, Spain | Archbishop of Granada, Spain |
| 44.2 | Appointed | Blas Joaquín Alvarez Palma † | Titular Bishop of Assuras | Archbishop of Granada, Spain |
| 57.8 | Appointed | Diego Santamaría Cevallos, O.F.M. † | Bishop of Santa Marta, Colombia |
| Born | Alessandro Domenico Veresino † | Casal-Cormelli | Archbishop of Sassari, Italy |
| 20 Apr | | Appointed | Hryhorij (Grzegorz) Koxanovyc (Kochanowicz) † | Auxiliary Bishop of Foreign Diocese | Archbishop of Kyiv-Vyshhorod (Ukrainian), Ukraine |
| 26 Apr | | Born | Charles-François Baillargeon † | Ile-aux-Grues | Archbishop of Québec, Québec, Canada |
| 28 Apr | | Born | Nicolas-Théodore Olivier † | Paris | Bishop of Evreux, France |
| 29 Apr | 69.5 | Died | Cristoforo a São Boaventura, O.F.M. † | Bishop of Santiago de Cabo Verde |
| May | 54.3 | Appointed | James Murphy † | Coadjutor Bishop of Clogher, Ireland | Bishop |
| 2 May | | Born | Célestine René Laurent Guynemer de la Hailandière † | Triandin, France | Bishop Emeritus of Vincennes, Indiana, USA |
| 14 May | 25.3 | Ordained Priest | Klemens August Freiherr Droste zu Vischering † | Priest of Münster, Germany | Archbishop of Köln {Cologne}, Germany |
| 25 May | 66.5 | Appointed | Stefano Borgia † | Pro-Prefect of the Congregation for Propagation of the Faith | Cardinal, Prefect |
| 27 May | 51.4 | Ordained Bishop | José Antonio de la Huerta Caso † | Bishop of León en Nicaragua |
| 4 Jun | | Born | Jean-Honoré Bara † | Sainte-Vaubourg | Bishop of Châlons, France |
| 8 Jun | 50.4 | Died | Charles Berington † | Vicar Apostolic of Midland District, England, Great Britain |
| 10 Jun | | Born | Cosimo Corsi † | Florence | Cardinal, Archbishop of Pisa, Italy |
| Born | José Antônio dos Reis † | São Paulo | Bishop of Cuiabá, Brazil |
| 42.2 | Appointed | Giuseppe Maria Spina † | Titular Archbishop of Corinthus | Cardinal, Archbishop Emeritus of Genova, Italy |
| 11 Jun | | Ordained Bishop | Charles Sughrue † | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| 13 Jun | 48.6 | Appointed | José Valério da Cruz † | Bishop of Portalegre, Portugal |
| 17 Jun | 44.4 | Ordained Bishop | Blas Joaquín Alvarez Palma † | Titular Bishop of Assuras | Archbishop of Granada, Spain |
| 47.9 | Ordained Bishop | Pedro Inocencio Bejarano † | Bishop of Buenos Aires, Argentina | Bishop of Sigüenza, Spain |
| 19 Jun | | Born | Johann Valerian Jirsík † | Katzow | Bishop of Ceské Budĕjovice {Budweis}, Czech Republic |
| 29 Jun | 39.3 | Ordained Priest | Giuseppe Stanislao Gentili † | Priest | Bishop of Colle di Val d’Elsa, Italy |
| 3 Jul | 51.2 | Appointed | José Carrión y Marfil † | Bishop of Trujillo, Peru | Bishop Emeritus |
| 44.3 | Appointed | José González de Cándamo y Cauniego † | Auxiliary Bishop of San Cristobal de la Habana, Cuba | Auxiliary Bishop of San Cristobal de la Habana, Cuba |
| 44.3 | Appointed | José González de Cándamo y Cauniego † | Titular Bishop of Mylasa | Auxiliary Bishop of San Cristobal de la Habana, Cuba |
| Born | Pier Giuseppe Vaggi, O.F.M. Cap. † | Genova | Bishop of Bobbio, Italy |
| 5 Jul | | Born | Dominic O’Brien † | Waterford | Bishop of Waterford and Lismore, Ireland |
| 6 Jul | 51.5 | Installed | José Antonio de la Huerta Caso † | Bishop of León en Nicaragua |
| 7 Jul | | Born | Felice Romano † | Torre del Greco | Bishop of Ischia, Italy |
| 8 Jul | 58.0 | Ordained Bishop | Diego Santamaría Cevallos, O.F.M. † | Bishop of Santa Marta, Colombia |
| 9 Jul | 58.0 | Died | Wilhelm Joseph Leopold Willibald Reichsfreiherr von Baden † | Auxiliary Bishop of Konstanz {Constance}, Germany |
| 12 Jul | 80.6 | Died | Francesco Antonio Marcucci † | Bishop of Montalto, Italy |
| Born | John Francis (William) Whelan, O.C.D. † | Dublin | Vicar Apostolic Emeritus of Bombay, India |
| 23 Jul | 42.3 | Appointed | Jean-André Doussain, M.E.P. † | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viêt Nam |
| 42.3 | Appointed | Jean-André Doussain, M.E.P. † | Titular Bishop of Adraa | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viêt Nam |
| 24 Jul | 47.6 | Appointed | St. Taurin Gabriel Dufresse, M.E.P. † | Coadjutor Vicar Apostolic of Se-Ciuen, China | Vicar Apostolic |
| 47.6 | Appointed | St. Taurin Gabriel Dufresse, M.E.P. † | Titular Bishop of Thabraca | Vicar Apostolic of Se-Ciuen, China |
| 29 Jul | 64.4 | Ordained Bishop | Andrés Aguiar Caamaño † | Bishop of Mondoñedo, Spain |
| 5 Aug | 49.5 | Ordained Bishop | Francisco Rousset de Jesús y Rosas, O.F.M. † | Bishop of Sonora, Sonora, México |
| 8 Aug | 32.3 | Appointed | Pierre Trenchant, M.E.P. † | Coadjutor Vicar Apostolic of Se-Ciuen, China |
| 9 Aug | 23.6 | Appointed | Jan Nepomucen Kossakowski † | Bishop of Vilnius, Lithuania |
| 11 Aug | | Born | Louis-Antoine de Salinis † | Morlaas | Archbishop of Auch, France |
| 14 Aug | 60.9 | Appointed | Antonio Tavira Almazán † | Bishop of Salamanca, Spain |
| 52.7 | Appointed | Juan Antonio de la Virgen María (Viana), O.C.D. † | Bishop of Almería, Spain |
| 18 Aug | | Born | Jacobus Gerardus Schepers † | | Vicar Apostolic of Dutch Guyana-Suriname, Suriname, Antilles |
| 22 Aug | | Born | Ignatius Aloysius Reynolds † | Bardstown, KY | Bishop of Charleston, South Carolina, USA |
| 23 Aug | | Born | Antonio Novasconi † | Castiglione | Bishop of Cremona, Italy |
| 28 Aug | 60.0 | Appointed | Juan Agapito Ramírez Arellano † | Bishop of Gerona, Spain |
| Sep | 45.1 | Ordained Bishop | Jakub Ignacy Dederko † | Bishop of Minsk, Belarus |
| 49.0 | Ordained Bishop | Cyprian Odyniec † | Titular Bishop of Hippos | Auxiliary Bishop of Mohilev, Belarus |
| 4 Sep | | Born | Costantino Patrizi Naro † | Siena | Cardinal, Secretary of the Congregation for Universal Inquisition |
| 7 Sep | 73.8 | Resigned | Vincenzo Maria Altieri † | Cardinal-Deacon of S. Maria in Via Lata | Cardinal, |
| 67.3 | Resigned | Tommaso Antici † | Cardinal-Priest of S. Maria in Trastevere | Cardinal, |
| 8 Sep | | Born | Camillo Letizia † | Napoli | Bishop of Tricarico, Italy |
| 14 Sep | 58.0 | Appointed | Pedro Díaz Valdés † | Bishop of Barcelona, Spain |
| 17 Sep | | Born | Antonio Benedetto Antonucci † | Subiaco | Cardinal, Bishop of Ancona e Numana, Italy |
| 18 Sep | | Born | Joseph-Antoine-Henri Jordany † | Puimoisson | Bishop Emeritus of Fréjus, France |
| 19 Sep | 23.1 | Ordained Priest | Johann Leonard Pfaff † | Priest of Fulda, Germany | Bishop |
| 22 Sep | 24.2 | Ordained Priest | Giuseppe Palma, O. Carm. † | Priest of Order of Our Lady of Mt. Carmel | Bishop of Avellino, Italy |
| 25 Sep | 62.4 | Appointed | Francisco Ignacio Iñigo Angulo † | Bishop of Osma, Spain |
| 29 Sep | | Born | Tommaso Jederlinich † | Castelmuschio | Bishop of Dubrovnik (Ragusa), Croatia |
| 30 Sep | 42.6 | Ordained Bishop | Giuseppe Maria Spina † | Titular Archbishop of Corinthus | Cardinal, Archbishop Emeritus of Genova, Italy |
| 6 Oct | | Born | Louis-Anne Nogret † | Josselin | Bishop Emeritus of Saint-Claude, France |
| 14 Oct | | Born | Luca Beraniecki † | Zurovia | Archbishop of Lviv, Ukraine |
| 15 Oct | | Born | Patrick Raymond Griffith, O.P. † | Limerick, Ireland | Vicar Apostolic of Cape of Good Hope, Western District {Capo di Buona Speranza, Distretto Occidentale}, South Africa |
| Born | Johann Georg Müller † | Koblenz | Bishop of Münster, Germany |
| 28 Oct | 51.3 | Ordained Bishop | Alexander Cameron † | Titular Bishop of Maximianopolis in Palaestina | Vicar Apostolic Emeritus of Lowland District, Scotland, Great Britain |
| 29 Oct | 54.5 | Appointed | Józef Miaskowski † | Bishop of Warszawa, Poland |
| 70.2 | Appointed | Fernando del Portillo y Torres, O.P. † | Archbishop of Santafé en Nueva Granada, Colombia |
| 8 Nov | 85.4 | Died | Pietro Maria Franzesi † | Bishop of Montepulciano, Italy |
| 9 Nov | | Born | Niccola Crispigni (Grispigni) † | Viterbo | Bishop of Foligno, Italy |
| 11 Nov | 60.2 | Ordained Bishop | Juan Agapito Ramírez Arellano † | Bishop of Gerona, Spain |
| 70.9 | Ordained Bishop | Lorenzo Suarez de Cantillana † | Bishop of Paraguay |
| 13 Nov | | Born | Mario Melini † | Montalcino | Bishop of Modigliana, Italy |
| 15 Nov | | Born | Joaquín Fernández Cortina † | Pendueles | Bishop of Sigüenza, Spain |
| 17 Nov | | Appointed | Kasper Kazimierz Cieciszowski † | Bishop of Luceoria o Łuck e Zytomir o Zytomierz, Ukraine | Archbishop of Mohilev, Belarus |
| 18 Nov | | Born | Giuseppe Montieri † | Treviso | Bishop of Aquino, Sora, e Pontecorvo, Italy |
| 19 Nov | | Appointed | Edward Dillon † | Archbishop of Tuam, Ireland |
| 30 Nov | | Born | Jean-Baptiste-Pierre-Léonard Berteaud † | Limoges | Bishop Emeritus of Tulle, France |
| Dec | 23.1 | Ordained Priest | Ludovico Micara, O.F.M. Cap. † | Priest | Cardinal, Bishop of Ostia (-Velletri), Italy |
| 7 Dec | | Born | Louis-Joseph Delebecque † | Wasteno | Bishop of Gent {Ghent, Gand}, Belgium |
| 8 Dec | | Born | Jean-Jacques-David Bardou † | Lautrec | Bishop of Cahors, France |
| 13 Dec | 78.7 | Died | Karl Friedrich Freiherr von Zehmen † | Auxiliary Bishop of Warmia, Poland |
| 14 Dec | 72.2 | Appointed | Francisco de Ibarra y Herrera † | Bishop of Caracas, Santiago de Venezuela | Archbishop of Caracas, Santiago de Venezuela |
| 16 Dec | | Born | Gil Estévez y Tomás † | Torá, Spain | Bishop of Tortosa, Spain |
| 22 Dec | 24.0 | Ordained Priest | Geronimo do Barco, O.F.M. † | Priest of Order of Friars Minor | Bishop Emeritus of Santiago de Cabo Verde |
| 30 Dec | | Born | Godehard Braun † | Vallendar | Auxiliary Bishop of Trier, Germany |
| 62.6 | Ordained Bishop | Francisco Ignacio Iñigo Angulo † | Bishop of Osma, Spain |