| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 42.0 | Appointed | Manuel Abad y Queipo † | Bishop of Michoacán, México | Former Bishop-Elect |
| 42.0 | Resigned | Manuel Abad y Queipo † | Bishop-Elect of Michoacán, México | Former Bishop-Elect |
| Born | Adamo Adami, O.S.B. † | | Minister General of Order of Saint Benedict |
| Born | Tomás Aguirre † | | Bishop of Guayaquil, Ecuador |
| 60.7 | Selected | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Archbishop of Bourges, France | Bishop Emeritus of Vaison, France |
| 23.4 | Ordained Priest | Jean-Jacques Fayet † | Priest | Bishop of Orléans, France |
| 75.0 | Died | Giuseppe Graziosi † | Auxiliary Bishop of Palestrina, Italy |
| 60.7 | Appointed | Adrijan Holovnja (Hołownia), O.S.B.M. † | Auxiliary Bishop of Kyiv-Halyč {Kiev} (Ukrainian), Ukraine | Auxiliary Bishop of Žyrovyci (Ukrainian), Lithuania |
| 41.9 | Confirmed | Guillaume-Auguste Jaubert † | Bishop of Saint-Flour, France | Former Bishop-Elect |
| 34.0 | Confirmed | Jan Krasovskyj (Krassowski) † | Archbishop of Polotsk (Połock)-Vitebsk (Ukrainian), Belarus | Bishop of Lutsk and Ostroh (Ukrainian), Ukraine |
| Died | Pierre Le Labousse † | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 63.6 | Died | Gioacchino Maria Mancusi (Mancuso) † | Archbishop of Conza, Italy |
| 23.3 | Ordained Priest | Myles Murphy † | Priest | Bishop of Ferns, Ireland |
| 71.0 | Died | Louis-Hector-Honoré-Maxime de Sabran † | Bishop of Laon, France |
| Born | Gabriele Chachathian (Sciasciatian) † | | Archbishop of Mardin (Armenian), Turkey |
| Appointed | Macaire IV Tawil, B.S. † | Bishop of Zahleh e Furzol (Melkite Greek), Lebanon | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| Ordained Bishop | Macaire IV Tawil, B.S. † | Bishop of Zahleh e Furzol (Melkite Greek), Lebanon | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 6 Jan | 26.2 | Ordained Priest | Mikołaj Górski † | Priest | Bishop of Kamyanets-Podilskyi (Kamieniec), Ukraine |
| 11 Jan | 57.2 | Died | Giovanni Battista Canaveri, C.O. † | Bishop of Vercelli, Italy |
| 13 Jan | 34.1 | Ordained Bishop | Jan Krasovskyj (Krassowski) † | Archbishop of Polotsk (Połock)-Vitebsk (Ukrainian), Belarus | Bishop of Lutsk and Ostroh (Ukrainian), Ukraine |
| 15 Jan | | Born | Luigi Jona † | | Bishop of Montefiascone, Italy |
| 20 Jan | 60.7 | Ordained Bishop | Adrijan Holovnja (Hołownia), O.S.B.M. † | Titular Bishop of the Titular See | Auxiliary Bishop of Žyrovyci (Ukrainian), Lithuania |
| 21 Jan | | Born | Annibale Capalti † | | Cardinal, Prefect of the Congregation for Studies |
| Born | Vincenzo Materozzi † | | Bishop of Ruvo e Bitonto, Italy |
| 22 Jan | | Born | Johann Chrysostomos Pogacar (Fogacar) † | | Bishop of Ljubljana, Slovenia |
| 23 Jan | 80.2 | Died | Leonardo Antonelli † | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 26 Jan | | Born | Jean-Henri Baldus, C.M. † | | Vicar Apostolic of Kiam-Si {Kiangsi}, China |
| 27 Jan | 24.0 | Ordained Priest | Estevam a Jesu Maria da Costa, O.F.M. Ref. † | Priest of Order of Reformed Friars Minor | Bishop of Angra, Portugal |
| Born | Paolo Hatem † | | Archbishop of Alep [Beroea, Halab] (Melkite Greek), Syria |
| 46.4 | Ordained Bishop | Lev (Leon) Javorskyj (Jaworowski), O.S.B.M. † | Titular Bishop of Volodymyr (Włodzimierz) | Auxiliary Bishop of Žyrovyci (Ukrainian), Lithuania |
| 89.9 | Died | Donato de’ Liguori † | Bishop of Venafro, Italy |
| 30 Jan | | Born | Felice Cantimorri, O.F.M. Cap. † | | Bishop of Parma, Italy |
| 2 Feb | | Born | Enrico Gajo, O.F.M. Cap. † | | Bishop of Bobbio, Italy |
| Born | Manuel María Negueruela Mendi † | | Archbishop of Santiago de Cuba |
| 9 Feb | | Born | Mario De Luca † | | Bishop of Gravina e Irsina (Montepeloso), Italy |
| Born | Pankratius von Dinkel † | | Bishop of Augsburg, Germany |
| Born | Jean-Antoine-Marie Pelamourgues † | | Priest of Dubuque, Iowa, USA |
| 10 Feb | 22.0 | Ordained Priest | Joseph Rosati, C.M. † | Priest of Congregation of the Mission | Bishop of Saint Louis, Missouri, USA |
| 12 Feb | 22.8 | Ordained Deacon | László Bémer de Bezdéd et Kisbáka † | Deacon of Eger, Hungary | Bishop Emeritus of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 13 Feb | 83.9 | Died | Francesco Maria Locatelli † | Cardinal, Bishop of Spoleto, Italy |
| 14 Feb | | Born | André-Pierre (Andreas) Borgniet, S.J. † | | Vicar Apostolic of Kiangnan, China |
| 15 Feb | | Born | István Neszveda † | | Auxiliary Bishop of Vác, Hungary |
| Born | Antonio Maria Valenziani † | | Bishop of Fabriano e Matelica, Italy |
| 18 Feb | 75.0 | Died | Marie-Charles-Isidore de Mercy † | Archbishop of Bourges, France |
| 20 Feb | | Born | Jean-Pierre Bravard † | | Bishop Emeritus of Coutances (-Avranches), France |
| 26 Feb | | Born | Francesco Mazzuoli † | | Bishop Emeritus of San Severino (Marche), Italy |
| Mar | | Born | Antonino Merciai, O.P. † | | Apostolic Delegate to Mesopotamia, Kurdistan, and Lesser Armenia, Iraq |
| 1 Mar | 78.4 | Died | Pedro Nolasco Mora Mora, O. de M. † | Bishop of Solsona, Spain |
| 3 Mar | 47.1 | Ordained Bishop | Louis-Charles-Auguste Hébert, M.E.P. † | Titular Bishop of Halicarnassus | Vicar Apostolic of Madurai and Coromandel Coast, India |
| 4 Mar | 48.7 | Succeeded | Esprit-Marie-Joseph Floren, M.E.P. † | Vicar Apostolic of Siam, Thailand |
| 66.1 | Died | Arnaud-Antoine Garnault, M.E.P. † | Vicar Apostolic of Siam, Thailand |
| 9 Mar | 22.9 | Ordained Priest | Gaetano Baluffi † | Priest | Cardinal, Bishop of Imola, Italy |
| 25.1 | Ordained Priest | Salvatore Fertitta † | Priest | Bishop of Cava e Sarno, Italy |
| 11 Mar | | Born | Joseph (José María Benito) Serra y Juliá, O.S.B. † | | Coadjutor Bishop Emeritus of Perth, Australia |
| 15 Mar | | Born | Félix María Arrieta y Llano, O.F.M. Cap. † | | Bishop Emeritus of Cádiz y Ceuta, Spain |
| 19 Mar | 82.3 | Died | Antoine-Eléonore-Léon Le Clerc de Juigné † | Archbishop Emeritus of Paris, France |
| 20 Mar | 72.1 | Died | Charles Erskine of Kellie † | Cardinal, Deacon of Roma {Rome}, Italy |
| 21 Mar | 73.1 | Died | Ippolito Antonio Vincenti Mareri † | Cardinal, Cardinal-Bishop of Sabina |
| 23 Mar | | Born | Ruggero Luigi Emidio Antici Mattei † | | Cardinal, Cardinal-Priest of San Lorenzo in Panisperna |
| 25 Mar | | Born | Luis Tola y Avilés † | | Bishop Emeritus of Portoviejo (Porto Vecchio), Ecuador |
| 28 Mar | | Born | St. John Nepomucene Neumann, C.Ss.R. † | | Bishop of Philadelphia, Pennsylvania, USA |
| Apr | 79.0 | Died | Filippo d’Aprile † | Bishop of Melfi e Rapolla, Italy |
| 1 Apr | 74.2 | Died | James Louis O’Donel, O.F.M. Obs. † | Vicar Apostolic Emeritus of Newfoundland, Canada |
| 4 Apr | | Born | Franz Bernert † | | Vicar Apostolic of Saxonia (Saxony), Germany |
| 6 Apr | | Born | Franz Joseph Rudigier (Rudiger) † | | Bishop of Linz, Austria |
| 8 Apr | 79.2 | Died | José Antonio Martínez de Aldunate † | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 13 Apr | 23.0 | Ordained Priest | László Bémer de Bezdéd et Kisbáka † | Priest of Eger, Hungary | Bishop Emeritus of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 15 Apr | 67.1 | Died | Francisco José de Souza Lima † | Auxiliary Bishop of Braga, Portugal |
| 16 Apr | | Born | Giuseppe Formisano † | | Bishop of Nola, Italy |
| 17 Apr | | Born | Angelo Pianori, O.F.M. Obs. † | | Bishop of Faenza, Italy |
| 18 Apr | 23.9 | Ordained Priest | Juraj Haulík Váralyai † | Priest | Cardinal, Archbishop of Zagreb, Croatia |
| 19 Apr | | Appointed | Manuel Redondo y Gómez † | Bishop of Santa Marta, Colombia |
| 21 Apr | | Born | Ludovico Ideo, O.P. † | | Bishop of Lipari, Italy |
| 22 Apr | | Born | Antoni Junosza Gałecki † | | Auxiliary Bishop Emeritus of Kraków, Poland |
| 25 Apr | | Born | Gaetano Carli, O.F.M. Cap. † | | Vicar Apostolic of Agra, India |
| May | 73.2 | Died | Antonio Rossi † | Bishop of Veroli, Italy |
| 1 May | 82.9 | Died | Filippo López y Rojo, C.R. † | Archbishop Emeritus of Palermo, Italy |
| 3 May | | Born | Leopold Pelldram † | | Bishop of Trier, Germany |
| 5 May | | Born | Giuseppe Arachial † | | Bishop of Ancira (Angora) (Armenian), Turkey |
| 14 May | | Born | Jean-Baptiste Charles Gazailhan † | | Bishop Emeritus of Vannes, France |
| 16 May | | Born | Luigi Sodo † | | Bishop of Telese o Cerreto Sannita, Italy |
| 17 May | | Born | Giuseppe Maria Maragioglio, O.F.M. Cap. † | | Bishop of Patti, Italy |
| 20 May | | Born | Bernardino Medina y Moreno † | | Bishop of Cartagena, Colombia |
| 2 Jun | | Born | Pierre-Simon-Louis-Marie de Dreux-Brézé † | | Bishop of Moulins, France |
| 8 Jun | 23.8 | Ordained Priest | Leopold Sedlnitzky Odrowąż von Choltitz † | Priest of Wrocław (Breslau), Poland | Bishop Emeritus |
| 11 Jun | 74.9 | Died | [André Constant], O.P. † | Bishop Emeritus of [Lot-et-Garonne (Constitutional), France] |
| 12 Jun | 51.4 | Appointed | Augustyn Karol Lipiński † | Auxiliary Bishop of Kraków, Poland |
| 14 Jun | | Born | Basilio Gil y Bueno † | | Bishop of Huesca, Spain |
| 19 Jun | | Born | John Derry † | | Bishop of Clonfert, Ireland |
| 24.6 | Ordained Priest | François-Marie-Edouard de Gualy † | Priest | Archbishop of Albi, France |
| 22 Jun | 72.1 | Died | Ferenc Miklósy † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 23 Jun | | Born | Jean-Baptiste-Joseph Lequette † | | Bishop of Arras (-Boulogne-Saint-Omer), France |
| 24 Jun | | Born | Carlo Savio † | | Bishop of Asti, Italy |
| 25 Jun | 25.0 | Ordained Priest | Cornelius Ludovicus van Wijkerslooth van Schalkwijk (Wykerslooth) † | Priest | Titular Bishop of Curium |
| 2 Jul | 73.1 | Died | Miklós Milassin, O.F.M. Obs. † | Bishop of Székesfehérvár (Albareale), Hungary |
| 3 Jul | | Born | Bartolomeo d’Avanzo † | | Cardinal, Bishop of Calvi e Teano, Italy |
| Born | Bernardino Maria Frascolla † | | Bishop of Foggia, Italy |
| 5 Jul | | Born | Niccola Maria Guida † | | Bishop of Molfetta, Giovinazzo e Terlizzi, Italy |
| 6 Jul | | Born | Vicente Fermín Márquez y Carrizosa † | | Bishop of Antequera, Oaxaca, México |
| 7 Jul | 24.1 | Ordained Priest | Juan Gregorio Urbieta † | Priest of Paraguay (o Ssma Assunzione) | Bishop |
| 9 Jul | 65.6 | Died | Felipe Peláez Caunedo † | Bishop of Lugo, Spain |
| 14 Jul | 22.2 | Ordained Deacon | Bartol Bozanić † | Deacon of Krk (Veglia), Croatia | Bishop |
| 15 Jul | 62.1 | Died | Florijan Korsak † | Auxiliary Bishop of Lutsk and Ostroh (Ukrainian), Ukraine |
| 75.9 | Died | Seignelay (Charles) Colbert (Cuthbert) de Castle Hill † | Bishop of Rodez, France |
| 23 Jul | 78.8 | Died | Giuseppe Corrado Panzini † | Bishop of Ugento, Italy |
| 24 Jul | 88.5 | Died | Juan Manuel Moscoso y Peralta † | Archbishop of Granada, Spain |
| 25 Jul | 16.8 | Solemn Vows | William Placid Morris, O.S.B. † | Member of Order of Saint Benedict | Apostolic Visitor (Visitator) Emeritus of Mauritius |
| 28 Jul | 61.8 | Died | Cyprian Odyniec, S.J. † | Auxiliary Bishop of Mohilev, Belarus |
| Born | Innocenzo Sannibale † | | Bishop of Gubbio, Italy |
| 29 Jul | | Born | Colin Francis MacKinnon † | | Bishop Emeritus of Arichat, Nova Scotia, Canada |
| 30 Jul | | Born | Félix-Pierre Fruchaud † | | Archbishop of Tours, France |
| 4 Aug | | Born | Lorenzo Donato Antonio Moffa, O.F.M. Obs. † | | Bishop of Boiano, Italy |
| 8 Aug | | Born | Francesco Benassi † | | Bishop Emeritus of Guastalla, Italy |
| 16 Aug | | Born | Giacomo Antonio Colli † | | Bishop of Alessandria (della Paglia), Italy |
| Born | Domingo Martí, O.P. † | | Vicar Apostolic of Central Tonking {Tonkino Centrale}, Viet Nam |
| 18 Aug | | Born | Antonio Belli † | | Bishop Emeritus of Terni, Italy |
| 20 Aug | 63.4 | Died | Bernardo Maria (Hercules Antonio Vincent) Carenzoni, O.S.B. † | Bishop of Feltre, Italy |
| 25 Aug | 23.0 | Ordained Deacon | Michael Johann Wagner † | Deacon of Linz, Austria | Bishop of Sankt Pölten, Austria |
| 27 Aug | 44.6 | Died | Antoine Casimir Libčre de Stockem † | Auxiliary Bishop of Ličge, Belgium |
| 31 Aug | | Born | Mateo Jaume y Garau † | | Bishop of Mallorca y Ibiza, Spain |
| 1 Sep | 89.6 | Died | Lorenzo Potenza † | Bishop of Sarno, Italy |
| 23.0 | Ordained Priest | Michael Johann Wagner † | Priest of Linz, Austria | Bishop of Sankt Pölten, Austria |
| 2 Sep | | Born | Antolín Monescillo y Viso † | | Cardinal, Archbishop of Toledo, Spain |
| 12 Sep | 82.2 | Died | Antonín Theodor Colloredo von Wallsee und Mels † | Cardinal, Archbishop of Olomouc, Czechia |
| 13 Sep | | Born | Jerome-Paul Hindi † | | Bishop of Gazireh (Gezira) (Chaldean), Turkey |
| 15 Sep | 23.6 | Resigned | Rudolf Johannes Joseph Rainier von Habsburg-Lotharingen † | Coadjutor Archbishop of Olomouc, Czechia | Cardinal, Archbishop |
| 17 Sep | | Born | Domenico Guadalupi † | | Archbishop Emeritus of Salerno (-Acerno), Italy |
| 20 Sep | | Born | Nicolas-Joseph Dabert † | | Bishop of Périgueux (-Sarlat), France |
| Born | Matteo Eustachio Gonella † | | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 21 Sep | 23.7 | Ordained Deacon | Guy Ignatius Chabrat, P.S.S. † | Deacon of Bardstown, Kentucky, USA | Coadjutor Bishop Emeritus |
| 24.0 | Ordained Priest | Michele de Gattis † | Priest | Bishop of Venosa, Italy |
| 23.0 | Ordained Deacon | Josip Godeassi † | Deacon | Archbishop of Zadar (Zara), Croatia |
| 24.7 | Ordained Priest | Daniel Latussek † | Priest of Wrocław (Breslau), Poland | Auxiliary Bishop |
| 35.9 | Ordained Priest | Marie-Joseph-François-Victor Monyer de Prilly † | Priest | Bishop of Châlons, France |
| 24.0 | Ordained Priest | Andrea Maria Rispoli, C.Ss.R. † | Priest of Congregation of the Most Holy Redeemer | Bishop of Squillace, Italy |
| 4 Oct | | Born | Buenaventura Rizo Patrón, O.F.M. Obs. † | | Bishop of Salta, Argentina |
| 9 Oct | 78.5 | Died | Filippo Casoni † | Cardinal, Secretary Emeritus of the Secretariat of State |
| 13 Oct | 24.2 | Ordained Priest | Rémi Gaulin † | Priest of Québec, Canada | Bishop of Kingston, Ontario, Canada |
| 15 Oct | 82.1 | Died | George Hay † | Vicar Apostolic Emeritus of Lowland District, Scotland, Great Britain |
| 22 Oct | | Born | Raffaele Antonio Morisciano † | | Bishop of Squillace, Italy |
| 30 Oct | 47.8 | Succeeded | Louis-Charles-Auguste Hébert, M.E.P. † | Superior of Karnatic Mission / Pondicherry, India | Vicar Apostolic of Madurai and Coromandel Coast, India |
| 15 Nov | | Born | Jacques-Maurice des Landes d’Aussac de Saint Palais † | | Bishop of Vincennes, Indiana, USA |
| 16 Nov | 67.3 | Appointed | François Antoine Lejéas † | Bishop of Ličge, Belgium | Former Bishop-Elect |
| 17 Nov | | Died | Kapriel Garulian (Ghadroul-Avkadian) † | Bishop of Alep (Armenian), Syria |
| 22 Nov | 62.2 | Died | Pedro Luis Blanco † | Bishop of León, Spain |
| 26 Nov | 50.4 | Selected | Maria-Thaddäus von Trauttmansdorf Wiensberg † | Cardinal, Archbishop of Olomouc, Czechia |
| Dec | 78.2 | Died | Bartolomé Antonio Fernández Sobrado, O.F.M. Cap. † | Bishop of Ceuta, Spain |
| 15 Dec | 23.4 | Ordained Priest | José Elías Puyana † | Priest | Bishop of Pasto, Colombia |
| 17 Dec | 35.5 | Appointed | Joaquim de Nossa Senhora de Nazareth Oliveira e Abreu, O.F.M. Ref. † | Prelate of Mozambico | Bishop of Coimbra, Portugal |
| 54.5 | Resigned | Vasco José a Domina Nostra de Bona Morte Lobo, C.R.S.A. † | Prelate of Mozambico | Prelate Emeritus |
| 19 Dec | 26.2 | Ordained Priest | Charles-Auguste-Marie-Joseph Forbin-Janson † | Priest of Chambéry, France | Bishop of Nancy (-Toul), France |
| 20 Dec | | Born | Inácio do Nascimento Morais Cardoso † | | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| Born | Miguel Payá y Rico † | | Cardinal, Archbishop of Toledo, Spain |
| 21 Dec | 23.9 | Ordained Priest | Guy Ignatius Chabrat, P.S.S. † | Priest of Bardstown, Kentucky, USA | Coadjutor Bishop Emeritus |
| 69.7 | Died | Orazio della Torre † | Bishop of Mazara del Vallo, Italy |
| 22.2 | Ordained Deacon | József Krautmann † | Deacon | Auxiliary Bishop of Esztergom, Hungary |
| 29.3 | Ordained Priest | St. Eugčne-Charles-Joseph de Mazenod, O.M.I. † | Priest | Bishop of Marseille, France |
| 24.8 | Ordained Priest | Joseph Norbert Provencher † | Priest | Bishop of Saint-Boniface, Manitoba, Canada |
| 24.1 | Ordained Priest | Claude-Marie-Paul Tharin † | Priest | Bishop Emeritus of Strasbourg, France |
| 24.1 | Ordained Priest | Clément Villecourt † | Priest of Lyon, France | Cardinal, Bishop Emeritus of La Rochelle (-Saintes), France |
| 25 Dec | | Born | Wilhelm Emmanuel von Ketteler † | | Bishop of Mainz, Germany |
| 29 Dec | | Born | Tomás Belestá y Cambeses † | | Bishop of Zamora, Spain |
| 30 Dec | | Born | Honorio María de Onaindía y López † | | Bishop of Huesca, Spain |