| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Appointed | Jean Accari † | Archbishop of Diarbekir (Amida) (Chaldean), Turkey |
| Ordained Bishop | Jean Accari † | Archbishop of Diarbekir (Amida) (Chaldean), Turkey |
| 25.3 | Ordained Priest | Jérôme-Marie Champion de Cicé † | Priest | Archbishop of Aix, France |
| 18.3 | Ordained Priest | Mateus de Abreu Pereira † | Priest | Bishop of Săo Paulo, Brazil |
| Appointed | Henri Ghuez, S.J. † | Prefect of French Guiana-Cayenne, Antilles | Prefect Emeritus |
| 27.9 | Ordained Priest | Adam Kłokocki † | Priest | Auxiliary Bishop of Lutsk and Zhytomyr (Łuck and Zytomierz), Ukraine |
| Born | Józef Krzysztofowicz † | | Titular Bishop of Arca in Phoenicia |
| 23.9 | Ordained Priest | Baltazar Jaime Martínez de Compańón † | Priest | Archbishop of Santafé en Nueva Granada, Colombia |
| 51.5 | Died | Filippo Mazzetti † | Bishop of Fossano, Italy |
| 61.0 | Ordained Bishop | Theophilus MacCartan † | Bishop of Down and Connor, Ireland |
| Born | Ramón Ignacio Méndez † | | Archbishop of Caracas, Santiago de Venezuela |
| 36.3 | Appointed | Antoni Adam Młodowski-Struś, O.S.B.M. † | Coadjutor Bishop of Pińsk-Turaŭ (Ukrainian), Belarus | Bishop of Volodymyr (Włodzimierz) et Brėst (Ukrainian) |
| 45.0 | Ordained Bishop | Philip Phillips † | Bishop of Killala, Ireland | Archbishop of Tuam, Ireland |
| Born | Antonio Angelo Radovani † | | Bishop of Shkodrë (Scutari), Albania |
| 24.2 | Ordained Priest | Alexandre-Angélique Talleyrand de Périgord † | Priest | Cardinal, Archbishop of Paris, France |
| 1 Jan | 57.1 | Selected | Jacques-Marie de Caritat de Condorcet † | Bishop of Lisieux, France |
| 4 Jan | 64.3 | Died | Bonaventura (Francis Antonio) Fabozzi, O.F.M. Obs. † | Bishop of Potenza, Italy |
| 48.0 | Ordained Bishop | Pierre Chapelle de Jumilhac de Cubjac † | Bishop of Lectoure, France |
| 8 Jan | 46.3 | Selected | Claude-Mathias-Joseph de Barral † | Bishop of Troyes, France | Bishop Emeritus |
| 35.9 | Selected | Jean-Baptiste-Marie Champion de Cicé † | Bishop of Auxerre, France |
| Born | Jean-Jacques Guérard, M.E.P. † | | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 11 Jan | 33.2 | Ordained Bishop | Etienne-Charles de Loménie de Brienne † | Bishop of Condom, France | Cardinal, Archbishop of Sens, France |
| 13 Jan | | Born | Gioacchino Tosi † | | Bishop Emeritus of Anagni, Italy |
| 14 Jan | 73.5 | Died | Onésimo Salamanca Zaldívar † | Archbishop of Burgos, Spain |
| 16 Jan | 84.4 | Died | Giovanni Andrea Tria † | Bishop Emeritus of Larino, Italy |
| 19 Jan | | Born | Vincenzo Ferrari, O.P. † | | Bishop of Melfi e Rapolla, Italy |
| 20 Jan | | Born | Lothar Anselm von Gebsattel † | | Archbishop of München und Freising {Munich}, Germany |
| 57.1 | Died | Filippo Niccolň Spinelli † | Bishop of Aversa, Italy |
| 21 Jan | | Born | Antonio Pérez de Hirias † | | Bishop of Mallorca, Spain |
| 22 Jan | 35.3 | Ordained Bishop | Ignaz Koller † | Titular Bishop of Targa | Bishop of Veszprém, Hungary |
| 23 Jan | | Born | Polikarp Antoni Augustyn Marciejewski, O.P. † | | Auxiliary Bishop of Sejny o Sejna o Augustów, Poland |
| 89.1 | Died | Álvaro Eugenio de Mendoza Caamańo y Sotomayor † | Cardinal, Patriarch of West Indies, Spain |
| 25 Jan | 57.5 | Installed | Leopold Josef Hannibal Petazzi de Castel Nuovo † | Bishop of Ljubljana (Laybach; Laibach), Slovenia |
| 28 Jan | 54.3 | Died | Diego del Corro † | Archbishop of Lima, Peru |
| Feb | 51.5 | Died | Bartolomeo Coccoli † | Bishop of Montepeloso, Italy |
| 1 Feb | 36.4 | Ordained Priest | Marcantonio Colonna (Jr.) † | Priest | Cardinal, Cardinal-Bishop of Palestrina |
| 5 Feb | 55.6 | Died | José Antonio Basurco y Herrera † | Bishop of Buenos Aires, Argentina |
| Born | José Maria de Santa Anna Noronha, O.S.P.P.E. † | | Bishop of Bragança e Miranda, Portugal |
| 6 Feb | 60.4 | Died | Clemens August Maria von Bayern † | Archbishop of Köln {Cologne}, Germany |
| 28.6 | Ordained Priest | Jérôme Joseph Franz de Paula Colloredo von Wallsee und Mels † | Priest of Wien {Vienna}, Austria | Archbishop of Salzburg, Austria |
| 8 Feb | | Born | Carlo Maria Lenzi, Sch. P. † | | Bishop of Lipari, Italy |
| 11 Feb | | Born | Joăo Inácio da Fonseca Manso † | | Bishop of Leiria, Portugal |
| 43.8 | Selected | Giuseppe Maria Pilo, O. Carm. † | Bishop of Ales e Terralba, Italy |
| 14 Feb | 57.2 | Resigned | Jacques-Marie de Caritat de Condorcet † | Bishop of Auxerre, France | Bishop of Lisieux, France |
| 26.0 | Ordained Priest | John Carroll † | Priest of Society of Jesus | Archbishop of Baltimore, Maryland, USA |
| 36.0 | Resigned | Jean-Baptiste-Marie Champion de Cicé † | Bishop of Troyes, France | Bishop of Auxerre, France |
| 22.9 | Ordained Deacon | Erasmus Dionys Krieger † | Deacon of Praha {Prague}, Czechia | Auxiliary Bishop |
| 23.0 | Ordained Priest | Andrej (André) Szabó † | Priest of Eger, Hungary | Bishop of Košice, Slovakia |
| 15 Feb | 30.6 | Ordained Priest | François Maria Collet, S.J. † | Priest of Society of Jesus | Titular Bishop of Adrasus |
| 16 Feb | 66.6 | Appointed | Octavius Antonius Baiardi † | Titular Archbishop of Tyrus |
| 46.4 | Confirmed | Claude-Mathias-Joseph de Barral † | Bishop of Troyes, France | Bishop Emeritus |
| 65.1 | Appointed | Giovanbattista Caracciolo, C.R. † | Bishop of Aversa, Italy |
| 57.2 | Confirmed | Jacques-Marie de Caritat de Condorcet † | Bishop of Lisieux, France |
| 36.0 | Confirmed | Jean-Baptiste-Marie Champion de Cicé † | Bishop of Auxerre, France |
| 39.4 | Appointed | Joseph-Crispin des Achards de La Baume † | Bishop of Cavaillon, France |
| 22 Feb | 59.0 | Ordained Bishop | Pedro Albornoz Tapia † | Bishop of Orihuela, Spain |
| 65.1 | Ordained Bishop | Giovanbattista Caracciolo, C.R. † | Bishop of Aversa, Italy |
| 80.0 | Died | Casimiro Rossi Reyna, O.F.M. Obs. † | Titular Bishop of Capsus |
| 24 Feb | 61.2 | Died | Gaetano de Carli † | Bishop of Rieti, Italy |
| 39.4 | Ordained Bishop | Joseph-Crispin des Achards de La Baume † | Bishop of Cavaillon, France |
| 25 Feb | 34.1 | Appointed | John MacDonald † | Coadjutor Vicar Apostolic of Highland District, Scotland, Great Britain | Vicar Apostolic |
| 34.1 | Appointed | John MacDonald † | Titular Bishop of Tiberiopolis | Vicar Apostolic of Highland District, Scotland, Great Britain |
| 1 Mar | 25.5 | Professed | José do Menino Jesus (Deus), O.C.D. † | Member of Order of Discalced Carmelites | Bishop of Viseu, Portugal |
| 63.3 | Died | Carlos Antonio Riomol y Quiroga † | Bishop of Mondońedo, Spain |
| 23.6 | Ordained Priest | August Franz von Strauß (Strauss) † | Priest of Mainz, Germany | Auxiliary Bishop |
| 2 Mar | 18.8 | Professed | António da Assunçăo, O.E.S.A. † | Member of Order of Hermits of St. Augustine | Bishop-Elect of Săo Tomé of Meliapore, India |
| 4 Mar | 46.9 | Selected | Maxmilián von Hamilton † | Bishop of Olomouc (Olmütz), Czechia |
| Born | Francesco Toli † | | Bishop of Pistoia e Prato, Italy |
| 6 Mar | | Born | Jean-Baptist-Marie-Anne-Antoine de Latil † | | Cardinal, Archbishop of Reims, France |
| 7 Mar | 22.9 | Ordained Priest | Antonio Maria Gardini, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Crema, Italy |
| 23.0 | Ordained Priest | Erasmus Dionys Krieger † | Priest of Praha {Prague}, Czechia | Auxiliary Bishop |
| 22.3 | Ordained Deacon | Johann Joseph Schüller von Ehrenthal † | Deacon of Lausitz (Lusatia), Germany | Prefect |
| 8 Mar | 23.0 | Ordained Priest | Serafino (Michelangelo) Vitale, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Minori, Italy |
| 9 Mar | 52.4 | Selected | Matteo Gennaro Testa Piccolomini † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus |
| 11 Mar | 76.1 | Died | Girolamo de Bardi † | Cardinal, Cardinal-Deacon of Santa Maria degli Angeli |
| Born | Charles Sughrue † | | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| 14 Mar | 66.9 | Selected | Ciro de Alteriis † | Bishop of Acerra, Italy |
| 53.6 | Selected | Carlo Parlati, C.P.O. † | Bishop of Potenza, Italy | Archbishop of Acerenza e Matera, Italy |
| 19 Mar | 22.8 | Ordained Priest | Miklós Milassin, O.F.M. Obs. † | Priest of Order of Observant Friars Minor | Bishop of Székesfehérvár (Albareale), Hungary |
| 21 Mar | 23.2 | Ordained Priest | Isidoro Leggio, C.Ss.R. † | Priest of Congregation of the Most Holy Redeemer | Bishop of Umbriatico (Umbriaticum), Italy |
| 24 Mar | 30.5 | Ordained Deacon | Franz Ludwig von Erthal † | Deacon | Bishop of Würzburg, Germany |
| 25 Mar | 61.2 | Died | Antonio Falangola † | Bishop of Caserta, Italy |
| 29 Mar | 46.5 | Ordained Bishop | Claude-Mathias-Joseph de Barral † | Bishop of Troyes, France | Bishop Emeritus |
| 5 Apr | 66.8 | Ordained Bishop | Octavius Antonius Baiardi † | Titular Archbishop of Tyrus |
| 6 Apr | 61.0 | Installed | Filippo Acciaioli † | Cardinal-Priest of Santa Maria degli Angeli | Cardinal, Bishop of Ancona e Numana, Italy |
| 48.3 | Appointed | Juan Manuel Argüelles † | Auxiliary Bishop of Toledo, Spain | Bishop of Palencia, Spain |
| 48.3 | Appointed | Juan Manuel Argüelles † | Titular Bishop of Botrys | Bishop of Palencia, Spain |
| 43.3 | Appointed | Josephus Antonius Bajtay, Sch. P. † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania | Bishop Emeritus |
| 62.0 | Appointed | Francesco Paolo Carelli † | Bishop of Montepeloso, Italy |
| 55.3 | Appointed | Girolamo Clarelli † | Bishop of Rieti, Italy |
| 37.0 | Appointed | Buenaventura Córdoba Espinosa de la Cerda † | Cardinal, Patriarch of West Indies, Spain |
| 37.0 | Appointed | Buenaventura Córdoba Espinosa de la Cerda † | Titular Archbishop of Neocaesarea in Ponto | Cardinal, Patriarch of West Indies, Spain |
| 67.0 | Confirmed | Ciro de Alteriis † | Bishop of Acerra, Italy |
| 33.5 | Appointed | Alvise Maria Gabrieli † | Bishop of Concordia (Sagittaria), Italy | Bishop of Vicenza, Italy |
| 35.2 | Confirmed | Antonius von Herberstein, C.R. † | Bishop of Trieste, Italy |
| 51.2 | Appointed | Francisco Ramón Herboso y Figueroa, O.P. † | Bishop of Santa Cruz de la Sierra, Bolivia | Archbishop of La Plata o Charcas, Bolivia |
| 52.8 | Selected | Max Friedrich von Königsegg und Rothenfels † | Archbishop of Köln {Cologne}, Germany |
| 36.3 | Confirmed | Louis-Joseph de Montmorency-Laval † | Cardinal, Bishop of Metz, France |
| 67.2 | Appointed | Alessandro Pappafava † | Titular Bishop of Famagusta |
| 53.6 | Confirmed | Carlo Parlati, C.P.O. † | Bishop of Potenza, Italy | Archbishop of Acerenza e Matera, Italy |
| 45.4 | Appointed | Lucas Ramírez Galán, O.F.M. Obs. † | Auxiliary Bishop of Cartagena (en Espańa) | Bishop of Tuy, Spain |
| 45.4 | Appointed | Lucas Ramírez Galán, O.F.M. Obs. † | Titular Bishop of Tanis | Bishop of Tuy, Spain |
| Born | Manuel da Encarnaçăo Sobrinho, O.S.P.P.E. † | | Titular Bishop of Nemesi |
| 40.1 | Appointed | Jan Maurycy von Strachwitz † | Auxiliary Bishop of Wrocław (Breslau), Poland | Apostolic Administrator |
| 40.1 | Appointed | Jan Maurycy von Strachwitz † | Titular Bishop of Tiberias | Apostolic Administrator of Wrocław (Breslau), Poland |
| 52.5 | Confirmed | Matteo Gennaro Testa Piccolomini † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus |
| 7 Apr | 80.9 | Died | José (de Bolańos) Calzado, O.F.M. Disc. † | Titular Archbishop of Nisibis |
| 12 Apr | 53.6 | Ordained Bishop | Carlo Parlati, C.P.O. † | Bishop of Potenza, Italy | Archbishop of Acerenza e Matera, Italy |
| 52.5 | Ordained Bishop | Matteo Gennaro Testa Piccolomini † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus |
| 73.5 | Ordained Bishop | Michael Wodzicki † | Bishop of Przemyśl, Poland |
| 14 Apr | 46.3 | Selected | Francisco Javier Delgado y Venegas † | Bishop of Islas Canarias {Canary Islands}, Spain | Cardinal, Patriarch of West Indies, Spain |
| 15 Apr | 60.2 | Appointed | Raphael Tuki † | Titular Bishop of Achantus | Titular Bishop of Arsinoë in Cypro |
| 16 Apr | 74.3 | Died | Domenico Antonio Berretti † | Bishop of Acerra, Italy |
| 19 Apr | 62.0 | Ordained Bishop | Francesco Paolo Carelli † | Bishop of Montepeloso, Italy |
| 26 Apr | 55.4 | Ordained Bishop | Girolamo Clarelli † | Bishop of Rieti, Italy |
| 27 Apr | | Born | Ignace Michel Zahir (Daher) † | | Patriarch Emeritus of Antiochia {Antioch} (Syrian), Lebanon |
| 28 Apr | | Born | Jean Jacoupy † | | Bishop Emeritus of Agen, France |
| 30 Apr | 35.3 | Ordained Bishop | Antonius von Herberstein, C.R. † | Bishop of Trieste, Italy |
| 18.5 | Professed | Vincenzo Rogadei, O.S.B. † | Member of Order of Saint Benedict | Bishop of Caserta, Italy |
| 1 May | 43.3 | Ordained Bishop | Josephus Antonius Bajtay, Sch. P. † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania | Bishop Emeritus |
| 9 May | 45.6 | Selected | Gennaro Maria Albertini, C.R. † | Bishop of Caserta, Italy |
| 13 May | 50.5 | Selected | Ferenc Barkóczy de Szala † | Archbishop of Esztergom, Hungary |
| 16 May | 24.6 | Ordained Priest | Alessandro Garimberti † | Priest | Bishop of Borgo San Donnino, Italy |
| 22.1 | Ordained Deacon | Franc Joef Mikolič (Mikolitsch) † | Deacon of Ljubljana (Laybach; Laibach), Slovenia | Auxiliary Bishop of Ljubljana, Slovenia |
| 22.9 | Ordained Priest | Felice Paoli † | Priest | Bishop of Recanati e Loreto, Italy |
| 22.6 | Ordained Deacon | Karl Godefried von Rosenthal † | Deacon of Olomouc, Czechia | Auxiliary Bishop |
| 24.3 | Ordained Priest | Filippo Scarola † | Priest | Titular Bishop of Helenopolis in Bithynia |
| 17 May | 40.2 | Ordained Bishop | Jan Maurycy von Strachwitz † | Titular Bishop of Tiberias | Apostolic Administrator of Wrocław (Breslau), Poland |
| 19 May | | Born | José Antonio Azpeitia y Sáenz de Santamaria † | | Bishop of Cartagena (en Espańa) |
| 20 May | 67.2 | Resigned | Valentín Moran Menéndez, O. de M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop Emeritus |
| 48.3 | Resigned | Jean-Antoine de Touchebuf de Beaumont des Junies † | Bishop of Rennes, France | Bishop Emeritus |
| 22 May | 48.0 | Died | Edmond Bennetat, M.E.P. † | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 25 May | 57.2 | Confirmed | Franz Joseph Friedrich Ambuel † | Bishop of Sion {Sitten}, Switzerland |
| 46.1 | Appointed | Giuseppe Cacace † | Bishop of Monopoli, Italy |
| 46.4 | Confirmed | Francisco Javier Delgado y Venegas † | Bishop of Islas Canarias {Canary Islands}, Spain | Cardinal, Patriarch of West Indies, Spain |
| 40.4 | Appointed | Mariano Martí † | Bishop of Puerto Rico (Porto Rico) | Bishop of Caracas, Santiago de Venezuela |
| 44.1 | Confirmed | Giuseppe Maria Pilo, O. Carm. † | Bishop of Ales e Terralba, Italy |
| 51.6 | Appointed | Giuseppe Simonetti † | Titular Archbishop of Petra in Palaestina | Cardinal, Cardinal-Priest of San Marcello |
| 27 May | 54.5 | Resigned | Pietro Saverio Antonini † | Bishop of Veroli, Italy | Bishop Emeritus |
| 55.4 | Died | Gennaro Perrelli † | Bishop of Penne e Atri, Italy |
| 28 May | | Born | Maria-Thaddäus von Trauttmansdorf Wiensberg † | | Cardinal, Archbishop of Olomouc, Czechia |
| 29 May | 54.8 | Resigned | Giovanni Antonio Castelli † | Bishop of Kotor (Cattaro), Montenegro | Bishop Emeritus |
| 30 May | | Born | Antal Török † | | Bishop of Csanád, Hungary |
| 31 May | 46.1 | Ordained Bishop | Giuseppe Cacace † | Bishop of Monopoli, Italy |
| 34.1 | Ordained Priest | Vicente Ferreira da Rocha, O.P. † | Priest of Order of Friars Preachers | Bishop of Castelo Branco, Portugal |
| 67.4 | Ordained Bishop | Alessandro Pappafava † | Titular Bishop of Famagusta |
| 45.6 | Ordained Bishop | Lucas Ramírez Galán, O.F.M. Obs. † | Titular Bishop of Tanis | Bishop of Tuy, Spain |
| 3 Jun | | Born | Pierre Dupont de Poursat † | | Bishop of Coutances, France |
| 4 Jun | | Born | John Baptist Mary David, P.S.S. † | | Bishop Emeritus of Bardstown, Kentucky, USA |
| 7 Jun | 17.1 | Professed | Bonaventura (Domenico Giuseppe) Gazzola, O.F.M. Ref. † | Member of Order of Reformed Friars Minor | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 51.7 | Ordained Bishop | Giuseppe Simonetti † | Titular Archbishop of Petra in Palaestina | Cardinal, Cardinal-Priest of San Marcello |
| 49.8 | Died | Giovanni Filippo Antonio San Martino † | Bishop of Asti, Italy |
| 11 Jun | 25.7 | Ordained Priest | Francis Moylan † | Priest of Cork and Cloyne, Ireland | Bishop of Cork, Ireland |
| 13 Jun | 69.0 | Died | Giuseppe Agostino Orsi, O.P. † | Cardinal, Cardinal-Priest of San Sisto |
| 43.0 | Appointed | Felipe Pérez Santa María † | Auxiliary Bishop of Toledo, Spain |
| 43.0 | Appointed | Felipe Pérez Santa María † | Titular Bishop of Constantia in Arabia | Auxiliary Bishop of Toledo, Spain |
| 14 Jun | | Born | Francesco di Paola Berretta † | | Auxiliary Bishop of Catania, Italy |
| 21 Jun | | Born | Patrick Maguire, O.F.M. Rec. † | | Coadjutor Bishop of Kilmore, Ireland |
| 22 Jun | 91.2 | Died | Raniero d’Elci † | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 28 Jun | 37.2 | Ordained Bishop | Buenaventura Córdoba Espinosa de la Cerda † | Titular Archbishop of Neocaesarea in Ponto | Cardinal, Patriarch of West Indies, Spain |
| 25.5 | Ordained Deacon | David Pilchowski † | Deacon | Auxiliary Bishop of Vilnius, Lithuania |
| 57.8 | Ordained Bishop | Hieronim Wieloglowski † | Titular Bishop of Benda | Auxiliary Bishop of Przemyśl, Poland |
| 29 Jun | | Born | Jacques de la Brue de Saint-Bauzile † | | Titular Bishop of Tempe |
| 25.5 | Ordained Priest | David Pilchowski † | Priest | Auxiliary Bishop of Vilnius, Lithuania |