| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 46.9 | Appointed | Jean de la Croix de Castries-Mairargues † | Bishop of Vabres, France |
| Appointed | Gianbattista Colombini † | Archbishop of Benevento, Italy |
| 38.9 | Appointed | Joseph-François d'Andigné de la Chasse † | Bishop of Saint-Pol-de-Léon, France | Bishop Emeritus of Chalons-sur-Saône, France |
| 71.7 | Died | Massenzio dei Conti Filo † | Bishop of Castellaneta, Italy |
| 40.0 | Appointed | Charles de La Cropte de Chanterac † | Bishop of Alet, France |
| 41.0 | Appointed | Charles-Antoine-Gabriel d'Osmond de Médavy † | Bishop of (Saint-Bernard de) Comminges, France | Bishop Emeritus |
| Appointed | Innocenzo Gorgoni, O.S.B. † | President of the Pontifical Ecclesiastical Academy |
| Appointed | Innocenzo Gorgoni, O.S.B. † | Titular Archbishop of Hemesa | President of the Pontifical Ecclesiastical Academy |
| 61.0 | Resigned | Jean-Louis de Gouyon de Vaudurand † | Bishop of Saint-Pol-de-Léon, France | Bishop Emeritus |
| Died | Romualdu Massei † | Bishop of Nebbio, France |
| Died | Giovan Battista Miceli † | Bishop of Cassano all’Jonio, Italy |
| Born | Augustin Milletich (Miletic), O.F.M. † | Fogniezae | Coadjutor Vicar Apostolic of Foreign Vicariate |
| 43.0 | Appointed | François de Narbonne-Lara † | Bishop of Gap, France | Bishop of Evreux, France |
| Resigned | Tommaso Ignazio Natta, O.P. † | Archbishop of Cagliari, Italy | Archbishop Emeritus |
| Died | Francesco Pacca † | Archbishop of Benevento, Italy |
| Died | Domenico Rovegno † | Archbishop of Brindisi, Italy |
| 36.4 | Appointed | Giulio Cesare Viancini † | Archbishop of Sassari, Italy | Bishop of Biella, Italy |
| Died | Richard Walsh † | Bishop of Cork, Ireland |
| 1 Jan | 38.8 | Appointed | Marc-Antoine de Noé † | Bishop of Lescar, France | Bishop of Troyes, France |
| 3 Jan | | Born | Joseph Fesch † | Ajaccio | Cardinal, Archbishop of Lyon (-Vienne), France |
| 11 Jan | | Born | Matthaeus Crasnich † | Prizren | Archbishop of Skopje, Macedonia |
| 14 Jan | 37.9 | Appointed | Henry Benedict Mary Clement Stuart of York † | Cardinal-Priest of S. Lorenzo in Damaso | Cardinal, Bishop of Frascati, Italy |
| 18 Jan | 54.7 | Died | Girolamo Colonna di Sciarra † | Cardinal, Cardinal-Deacon of S. Agata de’ Goti |
| 19 Jan | | Died | Antoine-Jérôme Boyvin de Vaurouy † | Former Bishop-Elect of Perpignan-Elne, France |
| 76.6 | Died | Antoni Józef Zolkowski † | Auxiliary Bishop of Vilnius, Lithuania |
| 24 Jan | 62.9 | Appointed | Filippo Acciaioli (Acciajuoli) † | Archbishop (Personal Title) of Ancona e Numana, Italy | Cardinal, Bishop |
| 56.0 | Appointed | Prospero Colonna di Sciarra † | Cardinal, Cardinal-Deacon of S. Agata de’ Goti |
| 58.3 | Appointed | Antonio De Cumis † | Bishop of Catanzaro, Italy |
| 43.6 | Appointed | Domenico Orsini d'Aragona † | Cardinal-Deacon of S. Maria ad Martyres | Cardinal, Cardinal-Deacon of S. Maria in Via Lata |
| Appointed | Giovanni Pignatelli † | Bishop of Anglona-Tursi, Italy | Bishop Emeritus |
| 38.7 | Appointed | Carlo Rezzonico (Jr.) † | Cardinal-Priest of S. Clemente | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 65.9 | Confirmed | Charles-Antoine de la Roche-Aymon † | Cardinal, Archbishop of Reims, France |
| 25 Jan | 55.9 | Appointed | Wilhelm Anton Freiherr von der Asseburg zu Hinnenburg † | Bishop of Paderborn, Germany |
| 40.1 | Appointed | Francesco Magni, O.F.M. † | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China | Vicar Apostolic Emeritus |
| 40.1 | Appointed | Francesco Magni, O.F.M. † | Titular Bishop of Miletopolis | Vicar Apostolic Emeritus of Shansi {Scian-Si} (Chan-Si), China |
| 27 Jan | 59.4 | Died | Johann Theodor von Bayern † | Cardinal, Bishop of Regensburg, Germany |
| 28 Jan | | Born | Joseph Walland † | | Archbishop of Gorizia e Gradisca, Italy |
| 29 Jan | 67.0 | Died | Juan José de Eguiara y Eguren † | Former Bishop-Elect of Yucatán (Mérida), Yucatán, México |
| Succeeded | Gabriel Wodzyński † | Bishop of Smoleńsk, Poland |
| 30 Jan | 58.3 | Ordained Bishop | Antonio De Cumis † | Bishop of Catanzaro, Italy |
| 35.3 | Appointed | Etienne-Charles de Loménie de Brienne † | Archbishop of Toulouse, France | Cardinal, Archbishop of Sens, France |
| 31 Jan | 29.0 | Appointed | Joseph Franz Anton von Auersperg † | Bishop of Lavant, Slovenia | Cardinal, Bishop of Passau, Germany |
| 2 Feb | | Born | Bernardo Martínez Carnero † | Villar | Bishop of Islas Canarias {Canary Islands}, Spain |
| 4 Feb | | Born | Pietro Antonio Cirio † | Acqui | Bishop of Susa, Italy |
| 7 Feb | 35.8 | Appointed | Friedrich Wilhelm Freiherr von Westphalen † | Bishop of Hildesheim, Germany |
| 8 Feb | 87.1 | Died | Charles-Alexandre Le Filleul de La Chapelle † | Bishop of Vabres, France |
| 16 Feb | | Born | Gaetano Maria de Franci † | Napoli | Archbishop of Trani e Nazareth e Bisceglie, Italy |
| 24 Feb | 39.1 | Ordained Bishop | Anne-François-Victor Le Tonnelier de Breteuil † | Bishop of Montauban, France |
| 26 Feb | | Born | Luigi Grati † | Falconara | Titular Bishop of Callinicum |
| 2 Mar | 53.2 | Died | Baldassare Cenci (Jr.) † | Cardinal, Cardinal-Priest of S. Maria in Ara Coeli |
| 3 Mar | | Born | Joseph-Octave Plessis † | Montréal | Archbishop of Québec, Québec, Canada |
| 10 Mar | | Born | Luc-Jean-Baptiste Bailly † | Paris | Bishop of Poitiers, France |
| 15 Mar | | Born | James Yorke Bramston † | Oundle | Vicar Apostolic of London District, England, Great Britain |
| 18 Mar | | Born | Francesco Maria Gazzoli † | Terni | Bishop of Todi, Italy |
| 19 Mar | 23.7 | Ordained Priest | Anton Ferdinand von Rothkirch und Panthen † | Priest of Wrocław, Poland | Auxiliary Bishop |
| 24.0 | Ordained Priest | Domenico Spinucci † | Priest | Cardinal, Archbishop of Benevento, Italy |
| 21 Mar | 74.1 | Appointed | Pietro Paolo de Conti † | Cardinal, Cardinal-Priest of S. Stefano al Monte Celio |
| 41.5 | Confirmed | Arthur-Richard Dillon † | Archbishop of Narbonne, France |
| 58.6 | Appointed | Francisco Fernández Játiva † | Bishop of Urgell, Spain |
| 50.6 | Appointed | Carlo Vittorio Amedeo delle Lanze † | Cardinal-Priest of S. Prassede | Cardinal, Prefect of the Congregation of the Council |
| 35.4 | Confirmed | Etienne-Charles de Loménie de Brienne † | Archbishop of Toulouse, France | Cardinal, Archbishop of Sens, France |
| 69.5 | Confirmed | Simon Nikolaus Euseb Reichsgraf von Montjoye-Hirsingen † | Bishop of Basel, Switzerland |
| 83.4 | Appointed | Giacomo Oddi † | Cardinal-Priest of S. Lorenzo in Lucina | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 67.4 | Appointed | Fabrizio Serbelloni † | Cardinal-Priest of S. Maria in Trastevere | Cardinal, Cardinal-Bishop of Ostia (-Velletri) |
| Born | Thomas Smith † | Brooms | Vicar Apostolic of Northern District, England, Great Britain |
| 41.2 | Appointed | José Tormo Juliá † | Auxiliary Bishop of Valencia, Spain | Bishop of Orihuela, Spain |
| 27 Mar | 36.0 | Ordained Priest | Friedrich Wilhelm Freiherr von Westphalen † | Priest of Hildesheim, Germany | Bishop |
| 28 Mar | | Born | Emanuel Maria Graf Thun † | Trento | Bishop of Trento, Italy |
| 1 Apr | | Born | Jean-Baptiste-Marie Caffarelli † | Falga | Bishop of Saint-Brieuc, France |
| Born | Vicente da Soledade e Castro, O.S.B. † | Porto | Archbishop of São Salvador da Bahia, Brazil |
| 3 Apr | | Born | Giuseppe Prin † | Sauze di Cesena | Bishop of Susa, Italy |
| 4 Apr | 59.6 | Died | Nicolás Gil Martínez y Malo † | Bishop of Santa Marta, Colombia |
| 10 Apr | | Born | Benito María de Moxó y Francolí, O.S.B. † | Cervera, Spain | Archbishop of La Plata o Charcas, Bolivia |
| 11 Apr | 56.2 | Ordained Priest | Wilhelm Anton Freiherr von der Asseburg zu Hinnenburg † | Priest of Paderborn, Germany | Bishop |
| 12 Apr | 69.2 | Died | Giuseppe Spinelli † | Cardinal, Cardinal-Bishop of Ostia |
| 15 Apr | | Born | Manuel Fraile García † | Lantadilla | Bishop of Sigüenza, Spain |
| 16 Apr | | Appointed | John Butler † | Bishop of Cork, Ireland | Bishop Emeritus |
| 18 Apr | 23.6 | Appointed | Klemens Wenzeslaus Herzog von Sachsen † | Bishop of Freising, Germany | Bishop of Augsburg, Germany |
| 20 Apr | 46.8 | Appointed | Charles Nicolas Alexandre d'Oultremont † | Bishop of Liège, Belgium |
| 26 Apr | 57.6 | Appointed | Giuseppe Maria Castelli † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 27 Apr | 23.6 | Appointed | Klemens Wenzeslaus Herzog von Sachsen † | Bishop of Regensburg, Germany | Bishop of Augsburg, Germany |
| May | 50.4 | Ordained Bishop | Ján Gustíni-Zubrohlavský † | Coadjutor Bishop of Nitra, Slovakia | Bishop |
| 4 May | 23.6 | Confirmed | Klemens Wenzeslaus Herzog von Sachsen † | Bishop of Regensburg, Germany | Bishop of Augsburg, Germany |
| 8 May | 62.1 | Ordained Bishop | Antonio Alcalde y Barriga, O.P. † | Bishop of Yucatán (Mérida), Yucatán, México | Bishop of Guadalajara, Jalisco, México |
| 13 May | | Born | José Antonio Joaquín Pérez Martínez y Robles † | Puebla | Bishop of Tlaxcala, Tlaxcala, México |
| 16 May | 56.3 | Confirmed | Wilhelm Anton Freiherr von der Asseburg zu Hinnenburg † | Bishop of Paderborn, Germany |
| 37.4 | Appointed | Nicola Filomarini (Filomarino), O.S.B. † | Archbishop of Acerenza e Matera, Italy | Bishop of Caserta, Italy |
| 79.8 | Appointed | Carlo Alberto Guidobono Cavalchini † | Cardinal-Bishop of Ostia (-Velletri) | Cardinal, Datary of the Apostolic Datary |
| 39.1 | Confirmed | Marc-Antoine de Noé † | Bishop of Lescar, France | Bishop of Troyes, France |
| 67.5 | Appointed | Fabrizio Serbelloni † | Cardinal-Bishop of Albano | Cardinal, Cardinal-Bishop of Ostia (-Velletri) |
| 36.1 | Confirmed | Friedrich Wilhelm Freiherr von Westphalen † | Bishop of Hildesheim, Germany |
| 17 May | | Born | Gervais-Marie-Joseph Ortric † | Baziège | Bishop of Pamiers, France |
| 22 May | 29.3 | Ordained Bishop | Joseph Franz Anton von Auersperg † | Bishop of Lavant, Slovenia | Cardinal, Bishop of Passau, Germany |
| 28 May | 25.6 | Ordained Priest | Raimondo A. Vecchietti † | Priest | Bishop of Colle di Val d’Elsa, Italy |
| 29 May | 26.8 | Ordained Priest | Carlo Bellisomi † | Priest | Cardinal, Bishop of Cesena, Italy |
| Jun | | Ordained Bishop | John Butler † | Bishop of Cork, Ireland | Bishop Emeritus |
| 4 Jun | 73.9 | Died | Johann Friedrich Karl Reichgraf von Ostein † | Archbishop of Mainz, Germany |
| 5 Jun | 42.4 | Ordained Bishop | Alexandre-César d'Anterroches † | Bishop of Condom, France |
| 11 Jun | 70.5 | Died | Camillo Paolucci † | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 12 Jun | 58.8 | Ordained Bishop | Francisco Fernández Játiva † | Bishop of Urgell, Spain |
| 39.2 | Ordained Bishop | Marc-Antoine de Noé † | Bishop of Lescar, France | Bishop of Troyes, France |
| Born | Carlo Puoti † | Napoli | Bishop of Alife, Italy |
| 15 Jun | 50.1 | Died | Josef Maria Reichsgraf von Thun und Hohenstein † | Bishop of Passau, Germany |
| 16 Jun | 22.8 | Ordained Priest | Anton Mandic † | Priest | Bishop of Sirmio, Croatia |
| 19 Jun | 40.5 | Ordained Bishop | Charles de La Cropte de Chanterac † | Bishop of Alet, France |
| 21 Jun | | Died | Richard Lincoln † | Archbishop of Dublin, Ireland |
| 23 Jun | | Born | Augustin Johann Joseph Gruber † | Wien | Archbishop of Salzburg, Austria |
| 26 Jun | 56.4 | Ordained Bishop | Wilhelm Anton Freiherr von der Asseburg zu Hinnenburg † | Bishop of Paderborn, Germany |