| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Thomas Costello † | | Bishop of Clonfert, Ireland |
| 40.3 | Died | Tomas Luiz da Conceição, O.A.D. † | Bishop of São Tomé e Príncipe |
| 81.7 | Died | Oronzio Filomarini, C.R. † | Bishop Emeritus of Gallipoli, Italy |
| Appointed | Jean-Simon Kemo † | Archbishop of Seert (Chaldean), Turkey |
| Ordained Bishop | Jean-Simon Kemo † | Archbishop of Seert (Chaldean), Turkey |
| 15.3 | Professed | Antonio Lanza, C.R. † | Member of Congregation of Clerics Regular | Bishop of Agrigento (Girgenti), Italy |
| 15.5 | Professed | Filippo López y Rojo, C.R. † | Member of Congregation of Clerics Regular | Archbishop Emeritus of Palermo, Italy |
| 55.8 | Resigned | José Mezquía Díaz de Arrízola, O. de M. † | Master General of Order of Our Lady of Mercy | Bishop of Solsona, Spain |
| 70.2 | Died | Antonio Monroy y Meneses, O. de M. † | Bishop Emeritus of Santa Marta, Colombia |
| 39.0 | Ordained Bishop | Thomas Stritch † | Titular Bishop of Teos | Coadjutor Bishop of Waterford and Lismore, Ireland |
| Appointed | Onufrij Šumljanškyj † | Coadjutor Bishop of Przemyśl, Sambor, et Sanok (Ukrainian), Poland | Bishop |
| 57.8 | Died | Andrés Vergara Uribe † | Bishop of Santa Cruz de la Sierra, Bolivia |
| 1 Jan | | Died | Martin Burke † | Bishop of Kilmacduagh, Ireland |
| 50.0 | Ordained Deacon | Xaverius Giustiniani † | Deacon | Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 37.8 | Ordained Priest | Franz Christoph von Hutten zu Stolzenfels † | Priest | Cardinal, Bishop of Speyer, Germany |
| 45.0 | Selected | Peter Kilkelly (Killikelly), O.P. † | Bishop of Kilmacduagh, Ireland |
| 4 Jan | 50.9 | Appointed | Carlo Francesco Durini † | Apostolic Nuncio to France | Cardinal, Bishop of Pavia, Italy |
| 6 Jan | | Born | [Nicolas Diot] † | | Bishop of [Marne (Constitutional), France] |
| Born | François de Gain de Montaignac † | | Bishop Emeritus of Tarbes, France |
| 11 Jan | 81.0 | Died | Ennemond-Flodoard Moret de Bourchenu † | Bishop Emeritus of Vence, France |
| 13 Jan | 61.3 | Resigned | Ludovico Savageri, C.R.S. † | Bishop of Alatri, Italy | Bishop Emeritus |
| 16 Jan | 65.0 | Died | Ramón Marimón Corbera † | Bishop of Vic, Spain |
| 18 Jan | | Born | Pedro Antonio Juano † | | Bishop of Menorca, Spain |
| 19 Jan | 37.2 | Ordained Bishop | Luigi Gualterio † | Titular Archbishop of Myra | Cardinal, Cardinal-Priest of San Giovanni a Porta Latina |
| 55.9 | Appointed | Luca Melchiore Tempi † | Apostolic Nuncio to Portugal | Cardinal, Cardinal-Priest of Santa Croce in Gerusalemme |
| 20 Jan | | Born | Francesco Saverio Passari † | | Titular Archbishop of Larissa in Thessalia |
| 22 Jan | 43.8 | Appointed | Filippo Acciaioli † | Apostolic Nuncio to Switzerland | Cardinal, Bishop of Ancona e Numana, Italy |
| 45.0 | Confirmed | Peter Kilkelly (Killikelly), O.P. † | Bishop of Kilmacduagh, Ireland |
| 39.9 | Selected | Georg Joseph Wilhelm Aloys Rinck von Baldenstein † | Bishop of Basel, Switzerland |
| 23 Jan | 40.3 | Selected | Johann Theodor von Bayern † | Bishop of Liège, Belgium | Cardinal, Bishop of Regensburg, Germany |
| 42.3 | Appointed | Enrico Enríquez † | Apostolic Nuncio to Spain | Cardinal, Cardinal-Priest of Sant’Eusebio |
| 26 Jan | 60.7 | Ordained Bishop | Claude Bouhier † | Bishop of Dijon, France |
| Born | Jan Chryzostom Kaczkowski † | | Auxiliary Bishop of Lutsk and Zhytomyr (Łuck and Zytomierz), Ukraine |
| Feb | 55.9 | Resigned | Luca Melchiore Tempi † | Apostolic Nuncio to Flanders, Belgium | Cardinal, Cardinal-Priest of Santa Croce in Gerusalemme |
| 2 Feb | 45.3 | Ordained Bishop | Pietro Gioeni † | Titular Bishop of Assuras | Auxiliary Bishop of Agrigento (Girgenti), Italy |
| 22.9 | Ordained Priest | Jan Maurycy von Strachwitz † | Priest of Wrocław (Breslau), Poland | Apostolic Administrator |
| 3 Feb | 35.3 | Confirmed | Nicola Maurizio Fontana † | Archbishop of Oristano, Italy |
| 61.3 | Appointed | Michael Ignatius Frivaisz † | Auxiliary Bishop of Esztergom, Hungary |
| 61.3 | Appointed | Michael Ignatius Frivaisz † | Titular Bishop of Germanicopolis | Auxiliary Bishop of Esztergom, Hungary |
| 37.9 | Confirmed | Franz Christoph von Hutten zu Stolzenfels † | Cardinal, Bishop of Speyer, Germany |
| 53.5 | Confirmed | Pedro José Manuel Martínez de Arizala, O.F.M. Obs. † | Archbishop of Manila, Philippines |
| 59.1 | Appointed | Giovanni Battista Rovero (Rotario da Pralormo) † | Cardinal, Archbishop of Torino {Turin}, Italy |
| 48.0 | Appointed | Giuseppe Maria Ruffo † | Archbishop of Capua, Italy |
| 53.0 | Appointed | Scipione Sersale † | Bishop of Lecce, Italy |
| 59.6 | Confirmed | Kasimir Anton von Sickingen † | Bishop of Konstanz {Constance}, Germany |
| 7 Feb | 67.5 | Died | Diego Fermín de Vergara, O.S.A. † | Archbishop of Santafé en Nueva Granada, Colombia |
| 8 Feb | | Born | Karl Theodor von Dalberg † | | Bishop of Konstanz {Constance}, Germany |
| 9 Feb | 44.8 | Ordained Bishop | Charles-François-Alexandre Cardevac de Gouy d’Havrincourt † | Bishop of Perpignan-Elne, France |
| 12 Feb | 40.4 | Confirmed | Johann Theodor von Bayern † | Bishop of Liège, Belgium | Cardinal, Bishop of Regensburg, Germany |
| 16 Feb | 40.0 | Ordained Bishop | Pierre-François-Xavier de Reboul de Lambert † | Bishop of Saint-Paul-Trois-Châteaux, France |
| 19 Feb | | Born | Francesco Maria Pignatelli (Jr.) † | | Cardinal, Cardinal-Priest of Santa Maria in Trastevere |
| 20 Feb | | Born | Alessandro Mattei † | | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 21 Feb | | Born | Joseph-Jacques Loison † | | Bishop of Bayonne, France |
| 23 Feb | | Born | Miguel Joaquín Matías Suárez, O.F.M. Cap. † | | Auxiliary Bishop of Zaragoza, Spain |
| 25 Feb | 60.8 | Died | Diego Felipe de Perea Magdaleno † | Archbishop of Burgos, Spain |
| 29 Feb | 24.1 | Ordained Priest | Gaetano Maria Capece, C.R. † | Priest of Congregation of Clerics Regular | Bishop of Pozzuoli, Italy |
| 1 Mar | 33.8 | Ordained Bishop | Tommaso de Moncada, O.P. † | Archbishop of Messina, Italy |
| 3 Mar | 83.4 | Died | Francesco Bentini † | Bishop of Comacchio, Italy |
| 76.3 | Succeeded | Giovanni Antonio Cavedi (Chevedo), O.F.M. † | Bishop of Comacchio, Italy |
| 65.1 | Died | Manuel Samaniego Jaca † | Archbishop Emeritus of Burgos, Spain |
| 4 Mar | 20.2 | Ordained Deacon | Atanazy Andrzej Szeptycki (Sheptyskyi), O.S.B.M. † | Deacon of Basilian Order of Saint Josaphat (Order of St. Basil the Great) | Bishop of Przemyśl, Sambor, et Sanok (Ukrainian), Poland |
| 6 Mar | | Born | Francisco José de Souza Lima † | | Auxiliary Bishop of Braga, Portugal |
| 7 Mar | 45.4 | Appointed | Ignazio Michele Crivelli † | Apostolic Nuncio to Flanders, Belgium | Cardinal, Titular Archbishop of Caesarea in Cappadocia |
| 8 Mar | | Born | François de Fontanges † | | Bishop of Autun, France |
| 41.8 | Ordained Bishop | Antonio Sánchez Sardinero † | Bishop of Huesca, Spain |
| 59.7 | Ordained Priest | Kasimir Anton von Sickingen † | Priest of Konstanz {Constance}, Germany | Bishop |
| 9 Mar | | Born | Karl Josef Jerome von Kolborn † | | Auxiliary Bishop of Regensburg, Germany |
| 15 Mar | 35.4 | Ordained Bishop | Nicola Maurizio Fontana † | Archbishop of Oristano, Italy |
| 75.2 | Died | José Pinheiro, S.J. † | Bishop of São Tomé of Meliapore, India |
| 16 Mar | 63.7 | Appointed | Nicolò Antonio Carafa, O.S.B. † | Titular Archbishop of Philippi | Bishop Emeritus of Tricarico, Italy |
| 44.5 | Appointed | Giovanni Francesco Cavallini † | Bishop of Alatri, Italy |
| 40.8 | Confirmed | Louis-Jacques d’Audibert de Lussan † | Archbishop of Bordeaux, France |
| 35.2 | Installed | Giorgio Doria † | Cardinal-Priest of San Lorenzo in Panisperna | Cardinal, Cardinal-Priest of Sant’Agostino |
| 51.8 | Appointed | Giuseppe Alfonso Miroglio † | Bishop of Alessandria (della Paglia), Italy |
| 43.4 | Confirmed | Ferenc Zichy † | Bishop of Győr (Raab), Hungary |
| 20 Mar | 37.4 | Appointed | Luigi Gualterio † | Apostolic Nuncio to Naples, Italy | Cardinal, Cardinal-Priest of San Giovanni a Porta Latina |
| 21 Mar | | Born | Francesco Milesi † | | Patriarch of Venezia {Venice}, Italy |
| 23.4 | Ordained Deacon | Martin Nugk von Lichtenhoff † | Deacon of Lausitz (Lusatia), Germany | Prefect |
| 22 Mar | 44.5 | Ordained Bishop | Giovanni Francesco Cavallini † | Bishop of Alatri, Italy |
| 51.8 | Ordained Bishop | Giuseppe Alfonso Miroglio † | Bishop of Alessandria (della Paglia), Italy |
| 30.4 | Ordained Deacon | Girolamo Spínola † | Deacon | Cardinal, Cardinal-Bishop of Palestrina |
| 24 Mar | 50.8 | Resigned | Vincenzo Acqua † | Apostolic Internuncio to France | Bishop of Spoleto, Italy |
| Born | Nicola Riganti † | | Cardinal, Bishop of Ancona e Numana, Italy |
| 25 Mar | 30.4 | Ordained Priest | Girolamo Spínola † | Priest | Cardinal, Cardinal-Bishop of Palestrina |
| 29 Mar | 51.1 | Resigned | Carlo Francesco Durini † | Apostolic Nuncio to Switzerland | Cardinal, Bishop of Pavia, Italy |
| Apr | 65.9 | Died | Francisco Salgado Quirago † | Bishop of Guadix, Spain |
| 1 Apr | | Born | Vicente Alexandre de Tovar † | | Prelate of Goiás, Brazil |
| 4 Apr | 37.0 | Ordained Priest | Francesco Castellini † | Priest | Bishop of Rimini, Italy |
| 23.9 | Ordained Deacon | György Richvaldszky † | Deacon | Auxiliary Bishop of Esztergom, Hungary |
| 24.0 | Ordained Priest | Tommaso Vespoli † | Priest of Napoli {Naples}, Italy | Auxiliary Bishop |
| 22.8 | Ordained Priest | Anton Zlatarić † | Priest | Bishop of Beograd (-Smederevo), Serbia |
| 6 Apr | 50.2 | Ordained Priest | Xaverius Giustiniani † | Priest | Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 9 Apr | 45.5 | Resigned | Ignazio Michele Crivelli † | Apostolic Nuncio to Germany | Cardinal, Titular Archbishop of Caesarea in Cappadocia |
| 10 Apr | 71.2 | Died | Giovanni Macario Valenti † | Bishop of Conversano, Italy |
| 11 Apr | | Born | Simón López García, C.O. † | | Archbishop of Valencia, Spain |
| 12 Apr | 40.9 | Ordained Bishop | Louis-Jacques d’Audibert de Lussan † | Archbishop of Bordeaux, France |
| 39.2 | Died | Johann Kaspar von Wolkenstein-Rodeneck † | Auxiliary Bishop of Trento, Italy |
| 13 Apr | 46.4 | Appointed | Nicola Cioffi † | Bishop of Sora, Italy | Archbishop of Amalfi, Italy |
| 41.8 | Appointed | Franciszek Kazimierz Dowgiałło Zawisza † | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 41.8 | Appointed | Franciszek Kazimierz Dowgiałło Zawisza † | Titular Bishop of Evaria | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 56.2 | Appointed | Filippo Felice del Prete † | Bishop of Conversano, Italy |
| 48.7 | Appointed | Alessio Ignazio Marucchi † | Bishop of Acqui, Italy |
| 40.1 | Confirmed | Georg Joseph Wilhelm Aloys Rinck von Baldenstein † | Bishop of Basel, Switzerland |
| 30.4 | Appointed | Girolamo Spínola † | Titular Archbishop of Laodicea in Phrygia | Cardinal, Cardinal-Bishop of Palestrina |
| 19 Apr | 48.7 | Ordained Bishop | Alessio Ignazio Marucchi † | Bishop of Acqui, Italy |
| 30.5 | Ordained Bishop | Girolamo Spínola † | Titular Archbishop of Laodicea in Phrygia | Cardinal, Cardinal-Bishop of Palestrina |
| 20 Apr | | Born | Michelangelo Luchi, O.S.B. † | | Cardinal, Priest of the Roman Curia - Other |
| 21 Apr | | Born | Bonaventura (Domenico Giuseppe) Gazzola, O.F.M. Ref. † | | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 23 Apr | 49.4 | Died | Melchiorre Delfico † | Bishop of Muro Lucano, Italy |
| 26 Apr | 56.2 | Ordained Bishop | Filippo Felice del Prete † | Bishop of Conversano, Italy |
| 46.7 | Died | Francisco Pablo Matos y Coronado † | Bishop of Michoacán, México |
| 1 May | 46.5 | Ordained Bishop | Nicola Cioffi † | Bishop of Sora, Italy | Archbishop of Amalfi, Italy |
| 2 May | 30.5 | Appointed | Girolamo Spínola † | Apostolic Nuncio to Germany | Cardinal, Cardinal-Bishop of Palestrina |
| 3 May | 65.2 | Ordained Deacon | Francesco Ricci † | Deacon | Cardinal, Cardinal-Priest of Santa Maria del Popolo |
| 4 May | 65.3 | Died | Joseph Oswald von Attems † | Bishop of Lavant, Slovenia |
| 5 May | | Born | Józef Miaskowski † | | Bishop of Warszawa, Poland |
| 16 May | 53.0 | Appointed | Manuel del Rio Flores, O.P. † | Bishop of Nueva Segovia, Philippines | Bishop-Elect |
| 17 May | 38.1 | Ordained Bishop | Franz Christoph von Hutten zu Stolzenfels † | Cardinal, Bishop of Speyer, Germany |
| Born | Juan Antonio Tamayo, O.S. † | | Titular Bishop of Botrys |
| 19 May | | Born | Irénée-Yves Desolle (Dessole) † | | Archbishop Emeritus of Chambéry, France |
| 23 May | 56.3 | Died | Charles de Bannes d’Avéjan † | Bishop of Alès (Alais), France |
| 26 May | 30.2 | Selected | Vigilius Augustin Maria von Firmian † | Bishop of Lavant, Slovenia | Bishop Emeritus |
| 30 May | 28.1 | Ordained Priest | Gaspare Barletta † | Priest | Bishop of Venosa, Italy |
| 24.0 | Ordained Priest | Martino Bianchi † | Priest | Archbishop of Lucca, Italy |
| 27.8 | Ordained Priest | Giuseppe Du Mesnil † | Priest | Bishop of Volterra, Italy |
| 24.1 | Ordained Priest | György Richvaldszky † | Priest | Auxiliary Bishop of Esztergom, Hungary |
| 31 May | 23.6 | Ordained Priest | Martin Nugk von Lichtenhoff † | Priest of Lausitz (Lusatia), Germany | Prefect |
| Jun | 64.5 | Resigned | Giacomo Oddi † | Apostolic Nuncio to Portugal | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 3 Jun | 16.0 | Professed | Raffaele Pasca, O.S.B. † | Member of Order of Saint Benedict | Bishop of Teano, Italy |
| 7 Jun | 22.6 | Ordained Deacon | Luis da Anunciação Azevedo, O.P. † | Deacon of Order of Friars Preachers | Bishop Emeritus of Angola e Congo |
| 11 Jun | 80.4 | Died | Jacques Pescherard, O.F.M. Cap. † | Coadjutor Bishop Emeritus of Baghdad, Iraq |
| 12 Jun | 74.2 | Resigned | Giovanni Maria Benzoni † | Bishop of Chioggia, Italy | Bishop Emeritus |
| 13 Jun | 52.6 | Died | Renato Massa † | Bishop of Rimini, Italy |
| 15 Jun | 29.1 | Appointed | Paolo Francesco Giustiniani, O.F.M. Cap. † | Bishop of Chioggia, Italy | Bishop Emeritus of Treviso, Italy |
| 61.9 | Installed | Francesco Landi Pietra † | Cardinal-Priest of Sant’Onofrio | Cardinal, Archbishop Emeritus of Benevento, Italy |
| 50.9 | Appointed | Vito Moio (Mojo) † | Bishop of Muro Lucano, Italy |
| 61.8 | Appointed | Ludovico Savageri, C.R.S. † | Titular Bishop of Tempe | Bishop Emeritus of Alatri, Italy |
| 18 Jun | | Born | Vincenz Joseph Franz Sales von Schrattenbach † | | Bishop of Brno, Czechia |
| 21 Jun | 29.1 | Ordained Bishop | Paolo Francesco Giustiniani, O.F.M. Cap. † | Bishop of Chioggia, Italy | Bishop Emeritus of Treviso, Italy |
| 51.0 | Ordained Bishop | Vito Moio (Mojo) † | Bishop of Muro Lucano, Italy |
| 24 Jun | 74.6 | Died | Bogusław Korwin Gosiewski † | Bishop of Smoleńsk, Poland |
| 25 Jun | 61.1 | Died | Angelo Maria (Jean Luc) Volanti, O.P. † | Bishop of Stagno (Ston), Croatia |
| 28 Jun | 60.0 | Died | Lazzaro Pallavicini † | Titular Archbishop of Thebae |