| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 70.0 | Resigned | Julien-François Becquet, C.S.Sp. † | Prefect of Iles Saint-Pierre et Miquelon | Prefect Emeritus |
| 27.0 | Ordained Priest | Charles Berington † | Priest of London District, England, Great Britain | Vicar Apostolic of Midland District, England, Great Britain |
| Born | Pacifico Deani, O.F.M. † | | Former Bishop-Elect of Cefalonia e Zante, Greece |
| Born | Jerónimo do Barco, O.F.M. Ref. † | | Bishop Emeritus of Santiago de Cabo Verde |
| 23.3 | Ordained Priest | Marie-Jean-Philippe Dubourg † | Priest | Bishop of Limoges, France |
| Born | Edmund Martin French, O.P. † | | Bishop of Kilmacduagh, Ireland |
| 49.1 | Resigned | Giuseppe Garampi † | Apostolic Nuncio to Poland | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 26.0 | Ordained Priest | Ambrosio Llano † | Priest | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 22.7 | Ordained Priest | Patrick MacMullan † | Priest of Down and Connor, Ireland | Bishop |
| Resigned | Maurice Poussin † | Prefect of French Guiana-Cayenne, Antilles | Prefect Emeritus |
| Born | Myles Prendergast, O.C.D. † | | Vicar Apostolic Emeritus of Verapoly, India |
| Appointed | Agapit Qonaisser † | Bishop |
| Ordained Bishop | Agapit Qonaisser † | Bishop |
| 33.4 | Incardinated | Ignacy Jan Zygmunt von Raczyński † | Priest of Poznań, Poland | Archbishop Emeritus of Gniezno, Poland |
| Appointed | Charles Robillard † | Prefect of French Guiana-Cayenne, Antilles | Prefect Emeritus |
| 40.5 | Incardinated | Valentin Philipp Anton Schmidt † | Priest of Speyer, Germany | Auxiliary Bishop |
| 82.0 | Died | Grégoire Sciukrallah Jaroue † | Archbishop of Jerusalem {Gerusalemme} (Syrian), Lebanon |
| 27.2 | Incardinated | Michal Mateusz Stadnicki, O.S.B.M. † | Priest | Bishop of Lutsk and Ostroh (Ukrainian), Ukraine |
| 47.7 | Appointed | Friedrich Wilhelm von Westphalen † | Vicar Apostolic of Nordic Missions, Germany | Bishop of Hildesheim, Germany |
| Jan | 82.8 | Died | Giustino Girolamo Bagnesi, O.S.B. † | Bishop of Chiusi e Pienza, Italy |
| 1 Jan | 46.3 | Ordained Bishop | Dominik Piotr Karwosiecki, O.F.M. Conv. † | Titular Bishop of Byblus | Bishop of Bacău, Romania |
| 2 Jan | | Born | Nicola Giuseppe Ugo † | | Archbishop of Sorrento, Italy |
| 8 Jan | | Born | Felice Greco † | | Bishop of San Marco e Bisignano, Italy |
| 18 Jan | 84.0 | Died | Francesco Alessandro Odoardi † | Bishop of Terracina, Priverno e Sezze, Italy |
| 19 Jan | 99.6 | Died | Joăo da Silva Ferreira † | Bishop of Tanger, Morocco |
| 65.3 | Died | Eugenio Benedetto Scaramuccia † | Bishop of San Severo, Italy |
| 26 Jan | 74.6 | Died | Henri-Gabriel van Gameren † | Bishop of Antwerpen {Antwerp, Anvers}, Belgium |
| 29 Jan | 64.2 | Died | Nicolas (Angelo Odardo) Stefanini † | Bishop of Accia and Mariana, France |
| 4 Feb | 78.5 | Died | Ferdinando Maria de Rossi † | Cardinal, Prefect of the Congregation of the Council |
| 5 Feb | 93.0 | Died | Domenico Antonio Peronaci † | Bishop of Umbriatico (Umbriaticum), Italy |
| 11 Feb | 72.3 | Died | Alonso Francos Arango † | Bishop of Orense, Spain |
| 12 Feb | 68.1 | Died | Peter Creagh † | Bishop of Waterford and Lismore, Ireland |
| 49.0 | Succeeded | William Egan † | Bishop of Waterford and Lismore, Ireland |
| 15 Feb | 57.1 | Elected | Giovanni Angelico Braschi † | Pope (Roma {Rome}, Italy) |
| Born | José Talayero Royo, O.P. † | | Bishop of Albarracin, Spain |
| 18 Feb | | Born | Giulio Cesare (Giacomo) Scotti, O.F.M. Cap. † | | Vicar Apostolic Emeritus of Sardhana, India |
| 20 Feb | 68.3 | Died | Jean-Joseph Chapelle de Saint-Jean de Jumilhac † | Archbishop of Arles, France |
| 22 Feb | 57.1 | Ordained Bishop | Giovanni Angelico Braschi † | Pope (Roma {Rome}, Italy) |
| 24 Feb | 53.7 | Selected | Anton Zlatarić † | Bishop of Beograd (-Smederevo), Serbia |
| 26 Feb | 34.8 | Selected | François Cittadella † | Bishop of Accia and Mariana, France |
| 36.3 | Selected | Bl. Jean-Marie du Lau d’Allemans † | Archbishop of Arles, France |
| 45.4 | Selected | Dominique Maria de Santini † | Bishop of Nebbio, France | Bishop Emeritus |
| 27 Feb | 43.7 | Selected | Franz Philipp von Inzaghi † | Bishop of Trieste, Italy | Bishop of Gorizia e Gradisca, Italy |
| Mar | 49.4 | Resigned | Guido Calcagnini † | Apostolic Nuncio to Naples, Italy | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 2 Mar | 41.4 | Resigned | Marcantonio Conti † | Bishop of Pesaro, Italy | Bishop Emeritus |
| 38.7 | Resigned | Jules-Basile Ferron de La Ferronnays † | Bishop of Saint-Brieuc, France | Bishop of Lisieux, France |
| 36.9 | Resigned | Joachim-François-Mamert de Conzié † | Bishop of Saint-Omer, France | Archbishop of Tours, France |
| 56.5 | Resigned | Henri-Marie-Bernardin de Rosset de Ceilhes de Fleury † | Archbishop of Tours, France | Archbishop of Cambrai, France |
| 6 Mar | 39.5 | Selected | János Szily † | Auxiliary Bishop of Győr (Raab), Hungary | Bishop of Szombathely, Hungary |
| 9 Mar | | Born | Gabriele Maria de Marchis † | | Titular Bishop of Tiberiopolis |
| 53.1 | Selected | Krysztof Hilary Szembek † | Coadjutor Bishop of Płock, Poland | Bishop |
| 11 Mar | 23.4 | Ordained Priest | Paolo Lamberto D’Allčgre † | Priest | Bishop of Pavia, Italy |
| 13 Mar | 54.7 | Appointed | Agustín de Alvarado y Castillo † | Archbishop of Santafé en Nueva Granada, Colombia | Bishop of Ciudad Rodrigo, Spain |
| 67.5 | Appointed | Rocco Maria Barsanti, C.R.M. † | Bishop of Fossombrone, Italy | Bishop of Pesaro, Italy |
| 30.1 | Selected | Kasper Kazimierz Kolumna Cieciszowski † | Coadjutor Bishop of Kyiv and Chernihiv (Kijów and Czernihow), Ukraine | Archbishop of Mohilev, Belarus |
| 54.7 | Appointed | Domenico Maria Clavarini, O.P. † | Bishop of Ventimiglia, Italy |
| 46.1 | Appointed | Pellegrino Consalvi † | Bishop of Fano, Italy |
| 52.6 | Appointed | Charles-Bernard Collin de Contrisson † | Auxiliary Bishop of Laon, France |
| 52.6 | Appointed | Charles-Bernard Collin de Contrisson † | Titular Bishop of Thermopylae | Auxiliary Bishop of Laon, France |
| 45.2 | Selected | Jan Józef Dembowski † | Coadjutor Bishop of Kamyanets-Podilskyi (Kamieniec), Ukraine | Bishop |
| 62.9 | Confirmed | Francesco Antonio Deplano † | Bishop of Iglesias, Italy |
| 56.1 | Confirmed | Friedrich Karl Joseph von Erthal † | Archbishop of Mainz, Germany | Archbishop Emeritus |
| 56.1 | Confirmed | Friedrich Karl Joseph von Erthal † | Bishop of Worms, Germany | Archbishop Emeritus of Mainz, Germany |
| 38.7 | Confirmed | Jules-Basile Ferron de La Ferronnays † | Bishop of Bayonne, France | Bishop of Lisieux, France |
| 38.8 | Appointed | Domingo Ramón Fernández Angulo † | Bishop of Tuy, Spain |
| 55.1 | Appointed | Giovanni Francesco Guidi di Bagno-Talenti † | Titular Archbishop of Myra | Titular Patriarch of Antiochia {Antioch} |
| 36.9 | Appointed | Józef Kazimierz Kossakowski † | Auxiliary Bishop of Vilnius, Lithuania | Bishop of Inflanty (Livonia)-Pilten, Poland |
| 36.9 | Appointed | Józef Kazimierz Kossakowski † | Titular Bishop of Cinna | Bishop of Inflanty (Livonia)-Pilten, Poland |
| 48.0 | Appointed | Tomás Lorenzana Butrón † | Bishop of Gerona, Spain |
| 41.3 | Appointed | Adam Stanisław Naruszewicz † | Coadjutor Bishop of Smoleńsk, Poland | Bishop of Lutsk (Łuck), Ukraine |
| 41.3 | Appointed | Adam Stanisław Naruszewicz † | Titular Bishop of Emmaüs | Bishop of Lutsk (Łuck), Ukraine |
| 47.9 | Appointed | Francisco Navarro Acevedo † | Bishop of Santa Marta, Colombia |
| 60.4 | Appointed | Gennaro Antonio de Simone † | Bishop of Pesaro, Italy | Cardinal, Bishop Emeritus |
| 50.1 | Appointed | Blas Manuel Sobrino y Minayo † | Bishop of Cartagena, Colombia | Bishop of Trujillo, Peru |
| 58.2 | Appointed | Simon Spalatin † | Bishop of Korčula (Curzola, Cursola), Croatia | Bishop of Ossero (Osor), Croatia |
| 61.4 | Appointed | Girolamo Spínola † | Cardinal-Priest of Santa Cecilia | Cardinal, Cardinal-Bishop of Palestrina |
| 14 Mar | | Born | Manoel Joaquim Gonçalves de Andrade † | | Bishop of Săo Paulo, Brazil |
| 17 Mar | 38.2 | Selected | László Kollonitz † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania | Archbishop of Kalocsa, Hungary |
| 19 Mar | 67.5 | Ordained Bishop | Rocco Maria Barsanti, C.R.M. † | Bishop of Fossombrone, Italy | Bishop of Pesaro, Italy |
| 46.2 | Ordained Bishop | Pellegrino Consalvi † | Bishop of Fano, Italy |
| 34.3 | Ordained Deacon | Joseph Christian Franz de Paula zu Hohenlohe-Waldenburg-Bartenstein † | Deacon | Bishop of Wrocław (Breslau), Poland |
| 58.2 | Ordained Bishop | Simon Spalatin † | Bishop of Korčula (Curzola, Cursola), Croatia | Bishop of Ossero (Osor), Croatia |
| 20 Mar | 73.4 | Died | Pedro Antonio de Barroeta Angel † | Archbishop of Granada, Spain |
| 21 Mar | 47.7 | Selected | Jan Alojzy Aleksandrowicz † | Coadjutor Bishop of Chełm, Poland | Bishop |
| 45.7 | Selected | Antoni Onufry Okęcki † | Coadjutor Bishop of Poznań, Poland | Bishop |
| 22 Mar | 62.5 | Appointed | Carlo Vittorio Amedeo delle Lanze † | Cardinal, Prefect of the Congregation of the Council |
| 24 Mar | | Born | Giuseppe-Maria Lais † | | Bishop of Ferentino, Italy |
| 25 Mar | 55.1 | Ordained Bishop | Giovanni Francesco Guidi di Bagno-Talenti † | Titular Archbishop of Myra | Titular Patriarch of Antiochia {Antioch} |
| 26 Mar | 54.8 | Ordained Bishop | Domenico Maria Clavarini, O.P. † | Bishop of Ventimiglia, Italy |
| 27 Mar | 74.8 | Died | Ottavio Maria de Mari, C.R.S. † | Bishop of Savona, Italy |
| 29 Mar | 52.9 | Appointed | Francesco Carafa della Spina di Traetto † | Cardinal, Prefect of the Congregation of Bishops and Regulars |
| 1 Apr | 75.2 | Died | Pierre Mauclerc de la Musanchčre † | Bishop of Nantes, France |
| 22.6 | Ordained Priest | Christoph Emanuel (Krzysztof Emanuel) von Schimonski-Schimoni † | Priest of Wrocław (Breslau), Poland | Bishop |
| 2 Apr | 52.6 | Ordained Bishop | Charles-Bernard Collin de Contrisson † | Titular Bishop of Thermopylae | Auxiliary Bishop of Laon, France |
| 3 Apr | 56.4 | Installed | Pasquale Acquaviva d’Aragona † | Cardinal-Deacon of Santa Maria in Aquiro | Cardinal, Cardinal-Deacon of Sant’Eustachio |
| 47.6 | Appointed | Antonio Maria Ambiveri † | Auxiliary Bishop of Bergamo, Italy |
| 47.6 | Appointed | Antonio Maria Ambiveri † | Titular Bishop of Aureliopolis in Asia | Auxiliary Bishop of Bergamo, Italy |
| 33.5 | Confirmed | Sébastien-Michel Amelot † | Bishop of Vannes, France | Bishop Emeritus |
| 44.1 | Installed | Innocenzo Conti † | Cardinal-Priest of San Silvestro in Capite | Cardinal, Cardinal-Priest of Santa Maria in Ara Coeli |
| 41.5 | Appointed | Marcantonio Conti † | Titular Archbishop of Damascus | Bishop Emeritus of Pesaro, Italy |
| 44.2 | Confirmed | Guillaume-Joseph d’Abzac de Mayac † | Bishop of Saint-Papoul, France |
| 69.2 | Appointed | Juan Manuel Garcia de Vargas y Ribera, O. de M. † | Bishop of Yucatán (Mérida), México | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 41.2 | Appointed | Francesco Giliberti † | Titular Bishop of Pompeiopolis in Cilicia |
| 49.8 | Confirmed | Johann Heinrich von Kerens, S.J. † | Bishop of Wiener Neustadt, Austria | Bishop of Sankt Pölten, Austria |
| 60.4 | Appointed | Christoph Bartholomäus Anton Migazzi Von Waal Und Sonnenthurn † | Cardinal-Priest of Santi Quattro Coronati | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 38.4 | Appointed | Michał Jerzy Poniatowski † | Coadjutor Bishop of Kraków, Poland | Archbishop of Gniezno, Poland |
| 56.6 | Confirmed | Henri-Marie-Bernardin de Rosset de Ceilhes de Fleury † | Archbishop of Cambrai, France |
| 36.0 | Appointed | Domenico Spinucci † | Titular Bishop of Targa | Cardinal, Archbishop of Benevento, Italy |
| 61.4 | Appointed | Girolamo Spínola † | Cardinal, Cardinal-Bishop of Palestrina |
| 61.8 | Appointed | Antonio Eugenio Visconti † | Cardinal-Priest of Santa Croce in Gerusalemme | Cardinal, Prefect of the Congregation for Indulgences and Relics |
| 5 Apr | 81.5 | Died | Simon Nikolaus Eusebius von Montjoye-Hirsingen (von Froberg) † | Bishop of Basel, Switzerland |
| Born | Franciszek di Paolo Pawłowski † | | Bishop of Płock, Poland |
| 8 Apr | 49.5 | Appointed | Guido Calcagnini † | Prefect of the Prefecture of the Papal Household | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 9 Apr | 49.1 | Selected | Jean-Auguste Frétat de Sarra † | Bishop of Nantes, France |
| 35.2 | Selected | Jean-Baptiste-Joseph de Lubersac † | Bishop of Tréguier, France | Bishop Emeritus of Chartres, France |
| Born | Vitaliano Provenzano † | | Auxiliary Bishop of Catanzaro, Italy |
| 11 Apr | 68.2 | Died | Meletius Kovács † | Auxiliary Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 13 Apr | 63.0 | Ordained Bishop | Francesco Antonio Deplano † | Bishop of Iglesias, Italy |
| 15 Apr | 22.7 | Ordained Priest | Giovanni Coppola † | Priest | Titular Archbishop of Myra |
| 17 Apr | 23.1 | Ordained Priest | John Chisholm † | Priest of Highland District, Scotland, Great Britain | Vicar Apostolic |
| 36.1 | Ordained Bishop | Domenico Spinucci † | Titular Bishop of Targa | Cardinal, Archbishop of Benevento, Italy |
| 19 Apr | 52.5 | Selected | Gerolamo Dandolfi (Landolfi) † | Bishop of Pozzuoli, Italy |
| 65.3 | Selected | Giuseppe Sparano † | Archbishop of Acerenza e Matera, Italy |
| 22 Apr | 35.0 | Resigned | François Cittadella † | Bishop of Nebbio, France | Bishop of Accia and Mariana, France |
| 23 Apr | 33.6 | Ordained Bishop | Sébastien-Michel Amelot † | Bishop of Vannes, France | Bishop Emeritus |
| 24 Apr | 44.4 | Elevated to Cardinal | Leonardo Antonelli † | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 36.4 | Confirmed | Bl. Jean-Marie du Lau d’Allemans † | Archbishop of Arles, France |
| 78.3 | Died | Jerzy Mikołaj Hylzen † | Bishop Emeritus of Smoleńsk, Poland |
| 43.9 | Confirmed | Franz Philipp von Inzaghi † | Bishop of Trieste, Italy | Bishop of Gorizia e Gradisca, Italy |
| 38.3 | Confirmed | László Kollonitz † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania | Archbishop of Kalocsa, Hungary |
| 39.6 | Appointed | János Szily † | Auxiliary Bishop of Győr (Raab), Hungary | Bishop of Szombathely, Hungary |
| 39.6 | Appointed | János Szily † | Bishop of Knin (Tinin), Croatia | Bishop of Szombathely, Hungary |
| 75.8 | Elevated to Cardinal | Bernardino de Vecchi † | Cardinal, Cardinal-Deacon of San Cesareo in Palatio |
| 53.8 | Confirmed | Anton Zlatarić † | Bishop of Beograd (-Smederevo), Serbia |
| 26 Apr | 60.7 | Died | Giovanni Evangelista Stefanini † | Bishop of Cittŕ della Pieve, Italy |
| 27 Apr | | Born | Pietro Ostini † | | Cardinal, Prefect of the Congregation of the Council |
| 30 Apr | 45.3 | Ordained Deacon | Jan Józef Dembowski † | Deacon | Bishop of Kamyanets-Podilskyi (Kamieniec), Ukraine |
| 37.1 | Ordained Bishop | Józef Kazimierz Kossakowski † | Titular Bishop of Cinna | Bishop of Inflanty (Livonia)-Pilten, Poland |
| 60.6 | Ordained Bishop | Gennaro Antonio de Simone † | Bishop of Pesaro, Italy | Cardinal, Bishop Emeritus |