| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Feliciano Alonso, O.P. † | Soto de Valdeón, Spain | Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viet Nam |
| Born | Benedetto Cervone † | Campanien | Bishop of L’Aquila, Italy |
| Born | Franciscus Aloysius Junosza Gzowski † | Vilnius | Titular Bishop of Thespiae |
| 58.3 | Died | Franciszek Kaznowski † | Auxiliary Bishop of Poznań, Poland |
| Born | Ángel Mariano Moscoso Pérez y Oblitas † | Arequipa | Bishop of Córdoba (Tucumán), Argentina |
| 65.0 | Died | Josaphat Parysowicz, O.F.M. Conv. † | Bishop of Bacău, Romania |
| 66.2 | Died | Miguel Esteban Pérez Estremera, O.S. † | Titular Bishop of Danaba |
| Born | Antonin Kornel Przedwojewski, O.F.M. Cap. † | Chelmen | Auxiliary Bishop of Gniezno, Poland |
| Born | Hugues-François de Regnault-Bellescize † | Belcize | Bishop of Saint-Brieuc, France |
| 39.3 | Died | Franciscus Aloysius von Lamberg † | Auxiliary Bishop of Passau, Germany |
| Jan | | Born | Franciszek Kandyd Ossolinski, O.F.M. Conv. † | Posnanien | Bishop of Kyiv and Chernihiv (Kijów and Czernihow), Ukraine |
| 1 Jan | 25.1 | Ordained Priest | Pietro Saverio Antonini † | Priest | Bishop Emeritus of Veroli, Italy |
| 3 Jan | | Born | Joaquín Company Soler, O.F.M. † | Penáguila | Archbishop of Valencia, Spain |
| 51.3 | Succeeded | St. Pedro Sanz, O.P. † | Vicar Apostolic of Fo-Kien, China |
| 84.8 | Died | Magino Ventallol, O.P. † | Vicar Apostolic of Fo-Kien, China |
| 6 Jan | | Born | Raimundo Melchor Magi Gómez, O. de M. † | Vinaroz | Bishop of Guadix, Spain |
| 8 Jan | 59.3 | Died | Hieronim Maciej Jełowicki † | Auxiliary Bishop of Lviv, Ukraine |
| 10 Jan | | Born | Battista Rivelli † | Vitolano | Archbishop of Brindisi, Italy |
| 13 Jan | | Born | Louis-François-Marc Hilaire de Conzié † | S. Martin du Mont | Bishop of Arras, France |
| 45.0 | Ordained Bishop | Charles-François Le Févre de Laubriéres † | Bishop of Soissons, France |
| 15 Jan | | Died | Francesco Barabara † | Prelate of Santa Lucia del Mela, Italy |
| Born | Francesco Paolo Perremuto, O.S.B. † | Caltagirone | Archbishop of Messina, Italy |
| 20 Jan | 23.9 | Ordained Priest | Giovanni Hieronymo Gradenigo, C.R. † | Priest of Congregation of Clerics Regular | Archbishop of Udine, Italy |
| 29 Jan | 41.5 | Appointed | Henri-Constance de Lort de Sérignan de Valras † | Bishop of Mâcon, France |
| Feb | | Born | János Bradács, O.S.B.M. † | Torisky | Bishop of Mukachevo (Munkács) (Ruthenian), Ukraine |
| 3 Feb | 47.1 | Succeeded | Jérôme-Louis de Foudras de Courcenay † | Bishop of Poitiers, France |
| 77.1 | Died | Jean-Claude de La Poype de Vertrieu † | Bishop of Poitiers, France |
| 5 Feb | | Born | Alessandro Maria Odoardi † | Ascoli della Marca | Bishop of Perugia, Italy |
| 10 Feb | 43.1 | Ordained Bishop | Stjepan Blasković, C.O. † | Bishop of Makarska, Croatia |
| 73.1 | Died | Rodrigo Marín Rubio † | Bishop of Jaén, Spain |
| 12 Feb | | Born | Joseph de Montfalcon du Cénole † | Saint-Offenge-Dessous | Archbishop of Tarentaise (Moûtiers-en-Tarentaise), France |
| 13 Feb | | Appointed | Juan Francisco Antonio de Escandón, C.R. † | Archbishop of Lima, Peru |
| 17 Feb | | Born | Wenzel Kobaltz † | Wittichenau | Prefect of Meißen (Meissen) {Lusazia o Lausitz; Sassonia}, Germany |
| 46.1 | Ordained Bishop | François-André Roussel de Tilly † | Bishop of Orange, France | Bishop Emeritus |
| 23 Feb | | Born | Antonio José Salinas y Moreno, O.F.M. † | Hellín | Bishop of Tortosa, Spain |
| 24 Feb | 78.4 | Died | Prospero Marefoschi † | Cardinal, Cardinal-Priest of San Silvestro in Capite |
| 26 Feb | | Born | Giuseppe Rossi † | Napoli | Titular Archbishop of Nicosia |
| 27 Feb | | Born | Jean-de-Dieu-Raymond de Boisgelin de Cucè † | Rennes | Cardinal, Archbishop of Tours, France |
| Mar | 52.0 | Died | Lelio Valentino Contessini-Ettorio † | Bishop of Pula (Pola), Croatia |
| Born | Alejandro José de Ochoa y Morillo † | La Plata | Bishop of La Paz, Bolivia |
| 1 Mar | 62.2 | Resigned | Honoré-François Grimaldi de Monaco † | Archbishop of Besançon, France | Archbishop Emeritus |
| 2 Mar | 64.0 | Ordained Bishop | Francisco Antonio Cepeda Guerrero † | Bishop of Segorbe, Spain |
| Born | Giulio Pignatelli, O.S.B. † | Napoli | Archbishop of Salerno, Italy |
| 3 Mar | 43.5 | Appointed | Joannes Antonius Foscarini † | Archbishop of Corfù, Greece |
| 29.3 | Confirmed | Moritz Adolf Karl von Sachsen-Zeitz (Saský) † | Bishop of Hradec Králové, Czech Republic | Bishop of Litoměřice, Czech Republic |
| 34.2 | Confirmed | François-Ernest de Salm-Reifferscheid † | Bishop of Tournai {Doornik}, Belgium |
| 8 Mar | 17.1 | Professed | Scipione Ardoino Alcontres, C.R. † | Member of Congregation of Clerics Regular | Archbishop of Messina, Italy |
| Born | François Bécherel † | Saint-Hilaire-du-Harcôuët | Bishop of Valence, France |
| 23.0 | Ordained Priest | Joseph-Nicolas de Montenach † | Priest of Lausanne, Switzerland | Bishop |
| 24.4 | Ordained Priest | Giuseppe Antonio Piperni † | Priest | Bishop of Caiazzo, Italy |
| 9 Mar | 43.5 | Ordained Bishop | Joannes Antonius Foscarini † | Archbishop of Corfù, Greece |
| 11 Mar | | Born | Giuseppe Gregorio Scotti † | Castelvecchio | Archbishop of Zadar (Zara), Croatia |
| 18 Mar | | Born | Jean-Antoine de Castellane Saint-Mauris † | Saint-Paul-Trois-Chateaux | Bishop Emeritus of Lavaur, France |
| 19 Mar | | Born | Giovanni Domenico Straticò, O.P. † | Iadren | Bishop of Hvar (Lesina), Croatia |
| 23 Mar | 24.0 | Ordained Priest | Alberto Maria Capobianco, O.P. † | Priest of Order of Friars Preachers | Archbishop Emeritus of Reggio Calabria, Italy |
| 25 Mar | 24.3 | Ordained Priest | Giovanni Donato Durante † | Priest | Bishop of Ugento, Italy |
| 29 Mar | | Born | Filippo de Aprile † | Gallipoli | Bishop of Melfi e Rapolla, Italy |
| 23.2 | Ordained Priest | Hieronymus Blasius Bonaccich † | Priest | Bishop of Šibenik (Knin), Croatia |
| 31 Mar | 47.2 | Appointed | Francesco Maria Alberici † | Bishop of Città della Pieve, Italy | Bishop of Foligno, Italy |
| 57.1 | Appointed | Antonio Maria Bacigalupi † | Bishop of Ventimiglia, Italy |
| 64.2 | Installed | Vincenzo Bichi † | Cardinal-Priest of San Pietro in Montorio | Cardinal, Cardinal-Bishop of Frascati |
| Appointed | Antoine-François de Bliterswyck de Montcley † | Archbishop of Besançon, France |
| 34.9 | Appointed | Francesco Scipione Maria Borghese † | Cardinal-Priest of San Silvestro in Capite | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 50.7 | Appointed | Wilhlemus Delvaux † | Bishop of Ypres (Ieper), Belgium |
| 50.4 | Appointed | Celestino Galiano, O.S.B. † | Titular Archbishop of Thessalonica | Archbishop Emeritus of Taranto, Italy |
| 50.4 | Resigned | Celestino Galiano, O.S.B. † | Archbishop of Taranto, Italy | Archbishop Emeritus |
| 45.1 | Confirmed | François-Hyacinthe de La Fruglaye de Kervers † | Bishop of Tréguier, France |
| 41.8 | Appointed | Jan Aleksander Lipski † | Bishop of Lutsk (Łuck), Ukraine | Cardinal, Bishop of Kraków, Poland |
| 34.9 | Appointed | Jean-Chrétien de Macheco de Prémeaux † | Bishop of Périgueux (Vesuna), France |
| 54.2 | Appointed | Giovanni Battista Rondoni † | Bishop of Assisi, Italy |
| Apr | | Born | Georgius Powslowski † | Lithuania | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 6 Apr | 46.3 | Ordained Bishop | Antonio Maturi, O.F.M. † | Bishop of Syros (e Milos), Greece |
| 54.2 | Ordained Bishop | Giovanni Battista Rondoni † | Bishop of Assisi, Italy |
| 11 Apr | 72.1 | Died | Colombino Bassi, O.S.B. † | Bishop of Pistoia e Prato, Italy |
| 12 Apr | 56.7 | Died | Giulio Cesare Compagnoni † | Bishop of San Severino (Marche), Italy |
| 59.3 | Selected | Gaspard de La Valette de Thomas † | Bishop of Autun, France | Bishop Emeritus |
| 14 Apr | 47.2 | Ordained Bishop | Francesco Maria Alberici † | Bishop of Città della Pieve, Italy | Bishop of Foligno, Italy |
| 15 Apr | 47.5 | Ordained Priest | Severino Antonio Missini † | Priest | Bishop of Borgo San Donnino, Italy |
| 78.3 | Died | Jacques-Antoine Phélypeaux † | Bishop of Lodève, France |
| 18 Apr | 67.7 | Died | Franz Ludwig am Rhein zu Neuburg † | Archbishop-Elect of Mainz, Germany |
| 20 Apr | 43.8 | Ordained Bishop | Francesco Maria Garetto, O.F.M. † | Titular Bishop of Ephesus | Coadjutor Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| Born | Domenico Maria Gentile † | Genova | Bishop Emeritus of Savona, Italy |
| 56.6 | Ordained Bishop | José Laso de la Vega y Cansino, O.F.M. † | Bishop of Santiago de Cuba | Bishop of Santiago de Cuba |
| 22 Apr | | Selected | Peter Mulligan, O.S.A. † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 24 Apr | | Born | Alfonso Marcos Llanes † | Noreña | Archbishop of Sevilla {Seville}, Spain |
| 45.3 | Died | Charles-Louis-Auguste Le Tonnelier de Breteuil † | Bishop of Rennes, France |
| Born | Bernardinus Muti † | Roma | Titular Archbishop of Petra in Palaestina |
| 30 Apr | 64.3 | Died | Nicola Guerriero † | Bishop of Ravello e Scala, Italy |
| May | | Born | Ladislaus Luzenszky † | Savoly | Auxiliary Bishop of Esztergom, Hungary |
| 4 May | 57.2 | Ordained Bishop | Antonio Maria Bacigalupi † | Bishop of Ventimiglia, Italy |
| 45.2 | Ordained Bishop | François-Hyacinthe de La Fruglaye de Kervers † | Bishop of Tréguier, France |
| 6 May | | Born | Giovanni Luca Solari † | Genova | Bishop of Brugnato, Italy |
| 7 May | 38.9 | Appointed | Luigi d’Alessandro † | Archbishop of Santa Severina, Italy | Archbishop of Bari (-Canosa), Italy |
| 76.3 | Confirmed | Daniel Joseph Mayer † | Archbishop of Praha {Prague}, Czech Republic |
| 56.2 | Appointed | Dionigi Pieragostini † | Bishop of San Severino (Marche), Italy |
| 36.6 | Confirmed | Claude de Rouvroy de Saint-Simon † | Bishop of Noyon, France | Bishop of Metz, France |
| 53.1 | Appointed | Matteo Trigona † | Bishop of Siracusa, Italy | Bishop Emeritus |
| 31.4 | Appointed | Marcin Załuski † | Auxiliary Bishop of Płock, Poland | Auxiliary Bishop Emeritus |
| 31.4 | Appointed | Marcin Załuski † | Titular Bishop of Draso | Auxiliary Bishop Emeritus of Płock, Poland |
| 8 May | 44.4 | Selected | Louis-Guy de Guérapin de Vauréal † | Bishop of Rennes, France | Bishop Emeritus |
| 24.0 | Ordained Priest | Jan Dominik Łopaciński † | Priest | Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 24.2 | Ordained Priest | Józef Julian Sapieha † | Priest | Coadjutor Bishop of Vilnius, Lithuania |
| 9 May | | Confirmed | Peter Mulligan, O.S.A. † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 11 May | 38.9 | Ordained Bishop | Luigi d’Alessandro † | Archbishop of Santa Severina, Italy | Archbishop of Bari (-Canosa), Italy |
| 53.1 | Ordained Bishop | Matteo Trigona † | Bishop of Siracusa, Italy | Bishop Emeritus |
| 14 May | 75.6 | Died | Vittorio Mazzocca, O.P. † | Bishop of Novigrad (Cittanova), Croatia |
| 18 May | 25.5 | Ordained Priest | Ignacy Augustyn Kozierowski † | Priest | Auxiliary Bishop of Gniezno, Poland |
| 21 May | 74.6 | Died | Raymond Recrosio, B. † | Bishop of Nice, France |
| 23 May | 53.0 | Died | Winimar Knippschild, O.S.B. † | Auxiliary Bishop of Paderborn, Germany |
| 25 May | 42.0 | Ordained Bishop | Jan Aleksander Lipski † | Bishop of Lutsk (Łuck), Ukraine | Cardinal, Bishop of Kraków, Poland |
| 35.0 | Ordained Bishop | Jean-Chrétien de Macheco de Prémeaux † | Bishop of Périgueux (Vesuna), France |
| 29 May | | Born | Vitale Giuseppe de’ Buoi † | Bologna | Bishop of Faenza, Italy |
| 31 May | | Born | Hieronymus Joseph Franz de Paula Colloredo von Wallsee und Mels † | Wien | Archbishop of Salzburg, Austria |
| 7 Jun | 24.3 | Ordained Priest | Gioacchino Martínez † | Priest | Bishop of Avellino e Frigento, Italy |
| 24.1 | Ordained Priest | Claude Humbert de Rolland † | Priest | Archbishop of Tarentaise (Moûtiers-en-Tarentaise), France |
| 9 Jun | 40.7 | Appointed | Miguel Vicente Cebrián Agustín † | Bishop of Coria, Spain | Bishop of Córdoba, Spain |
| 66.6 | Selected | Philipp Karl von Eltz zu Kempenich † | Archbishop of Mainz, Germany |
| 47.6 | Appointed | Severino Antonio Missini † | Bishop of Borgo San Donnino, Italy |
| 52.6 | Appointed | Giacomo Oddi † | Titular Archbishop of Laodicea in Phrygia | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 50.7 | Appointed | Antonio Maria Santoro, O.M. † | Bishop of Ravello e Scala, Italy |
| 14 Jun | | Appointed | Jean-Georges de Souillac † | Bishop of Lodève, France |
| 15 Jun | | Born | Roberto Costaguti † | Livorno | Bishop of Sansepolcro (Borgo San Sepolcro), Italy |
| 36.7 | Ordained Bishop | Claude de Rouvroy de Saint-Simon † | Bishop of Noyon, France | Bishop of Metz, France |
| 17 Jun | 50.0 | Selected | Franz Georg von Schönborn † | Bishop of Worms, Germany | Archbishop of Trier, Germany |
| 18 Jun | 58.5 | Installed | Jan-Baptist de Smet † | Bishop of Gent {Ghent, Gand}, Belgium |
| 22 Jun | 47.7 | Ordained Bishop | Severino Antonio Missini † | Bishop of Borgo San Donnino, Italy |
| 24 Jun | 52.6 | Ordained Bishop | Giacomo Oddi † | Titular Archbishop of Laodicea in Phrygia | Cardinal, Bishop of Viterbo e Tuscania, Italy |