| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Cornelio Caprara † | Bologna, Italy | Cardinal, Cardinal-Deacon of Santi Cosma e Damiano |
| Born | André-Jean-Baptiste-Dominique de Castellane † | Poitiers | Bishop of Glandèves, France |
| Born | Isidro Alfonso Cavanillas † | Talarrubias | Bishop of Zamora, Spain |
| Born | Lorenzo Despuig Cotoner † | Palma de Mallorca | Archbishop of Tarragona, Spain |
| Born | Bertrand-Jean-Baptiste-René du Guesclin † | Rennes | Bishop of Cahors, France |
| Born | Juan de La Fuente Yepes † | Manila | Bishop of Nueva Segovia, Philippines |
| 47.0 | Died | Kazimierz Benedykt Lezeński, O. Cist. † | Auxiliary Bishop of Warmia (Ermland), Poland |
| 61.0 | Ordained Bishop | Diego Morcillo Rubio de Suñón de Robledo, O.SS.T. † | Bishop of Nicaragua | Archbishop of Lima, Peru |
| Born | Joannes Nieto Polo del Aguila † | Popayanen | Bishop of Quito, Ecuador |
| 50.9 | Resigned | Francesco Pignatelli (Sr.), C.R. † | Apostolic Nuncio to Poland | Cardinal, Archbishop of Napoli {Naples}, Italy |
| Born | Charles-Marie de Quélen † | Commana | Titular Bishop of Bethleem |
| Born | Raimondo Quesada † | Sassari | Bishop of Bosa, Italy |
| 74.1 | Resigned | Matthias Starck † | Auxiliary Bishop of Mainz, Germany | Auxiliary Bishop Emeritus |
| Born | Hervé-Nicolas Thépault de Brignou † | Morlaix | Bishop of Saint-Brieuc, France |
| 5 Jan | | Born | Paul d’Albert de Luynes † | Versailles | Cardinal, Archbishop of Sens, France |
| 34.9 | Appointed | Vincenzo Bichi † | Apostolic Nuncio to Switzerland | Cardinal, Cardinal-Bishop of Frascati |
| 13 Jan | 72.0 | Died | Luís da Silva Teles † | Archbishop of Évora, Portugal |
| 14 Jan | 51.6 | Installed | André-Daniel de Beaupoil de Saint-Aulaire † | Bishop of Tulle, France | Bishop Emeritus |
| 15 Jan | 51.0 | Appointed | Antonius Babbi † | Bishop of Shkodrë (Scutari), Albania |
| 57.0 | Appointed | Giovanbattista Caracciolo, C.R. † | Bishop of Calvi Risorta, Italy |
| 35.9 | Appointed | Alphonsus del Balzo † | Bishop of Carinola (Calina), Italy |
| 46.6 | Appointed | Giacomo Falconetti, O.P. † | Bishop of Grosseto, Italy |
| 47.3 | Appointed | Matteo Gagliani † | Bishop of Sora, Italy |
| 64.0 | Appointed | Fernando Manuel de Mejía † | Archbishop of Burgos, Spain |
| 60.0 | Appointed | Stephanus Sciran, O.P. † | Archbishop of Nachitschewan (Naxivan, Nakhtchevan, Nakhchivan), Armenia |
| 54.2 | Appointed | Michele Carlo Visdomini Cortigiani † | Bishop of Pistoia e Prato, Italy |
| 21 Jan | 54.1 | Ordained Bishop | Manuel de Escalante Colombres y Mendoza † | Bishop of Durango, México | Bishop of Michoacán, México |
| Feb | | Born | Samuel Głowiński † | Bratoponicen | Auxiliary Bishop of Lviv, Ukraine |
| 44.8 | Died | Giorgio Parchich † | Bishop of Nona (Nin), Croatia |
| 4 Feb | 40.7 | Ordained Priest | Pompilio Berlingieri † | Priest | Bishop Emeritus of Bisignano, Italy |
| 12 Feb | 61.1 | Appointed | Michele Caro † | Bishop of Syros (e Milos), Greece |
| Appointed | Vittore Felice Conci † | Bishop of Fondi (Fundi), Italy |
| 50.4 | Appointed | Johann Edmund Gedult von Jungenfeld † | Auxiliary Bishop of Mainz, Germany |
| 50.4 | Appointed | Johann Edmund Gedult von Jungenfeld † | Titular Bishop of Mallus | Auxiliary Bishop of Mainz, Germany |
| 48.6 | Appointed | Tommaso della Gherardesca † | Bishop of Fiesole, Italy | Archbishop of Firenze {Florence}, Italy |
| 18 Feb | | Born | Miguel da Anunciação (da Cunha), O.S.A. † | Ulixbonen | Bishop of Coimbra, Portugal |
| 19 Feb | 43.3 | Appointed | Joseph-François Gualtieri † | Bishop of Vaison, France |
| 51.0 | Appointed | Francesco Pignatelli (Sr.), C.R. † | Cardinal, Archbishop of Napoli {Naples}, Italy |
| 55.7 | Appointed | Giovanni Francesco Maria Poggi, O.S.M. † | Bishop of San Miniato, Italy |
| 56.2 | Appointed | Nicolaus Righetti † | Bishop of Martirano (Martoranum), Italy |
| 24 Feb | 55.7 | Ordained Bishop | Giovanni Francesco Maria Poggi, O.S.M. † | Bishop of San Miniato, Italy |
| 4 Mar | 43.3 | Ordained Bishop | Joseph-François Gualtieri † | Bishop of Vaison, France |
| 60.1 | Installed | García Felipe de Legazpi y Velasco Altamirano y Albornoz † | Bishop of Michoacán, México | Bishop of Tlaxcala, México |
| 5 Mar | 51.4 | Appointed | Gerolamo Archinto † | Bishop of Vigevano, Italy |
| 36.2 | Appointed | Giacinto Dragonetti, C.O. † | Bishop of Nusco, Italy | Bishop of Marsi, Italy |
| 38.7 | Appointed | Pietro Valerio Martorelli † | Bishop of Montefeltro, Italy | Bishop Emeritus |
| 52.6 | Appointed | Nicolaus Ventriglia † | Bishop of Acerno, Italy |
| 7 Mar | | Born | José Francisco Losada Quiroga † | Parroquia de Santa Eulalia de Trabazos | Bishop of Mondoñedo, Spain |
| 8 Mar | | Born | Honuphrius del Tufo † | Napoli | Bishop of Guardialfiera (Guardia), Italy |
| 14 Mar | 61.2 | Appointed | Bonaventure Giffard † | Vicar Apostolic of London District, England, Great Britain |
| Born | Dionigi Latomo † | Brindisi | Bishop of Alessano, Italy |
| 15 Mar | 55.2 | Appointed | Angelo Maria Porfiri (Porfirius) † | Bishop of Alife, Italy |
| 18 Mar | 51.4 | Ordained Bishop | Gerolamo Archinto † | Bishop of Vigevano, Italy |
| 37.5 | Ordained Bishop | François-Elie de Voyer de Paulmy d’Argenson † | Bishop of Dol, France | Archbishop of Bordeaux, France |
| 22 Mar | 43.2 | Died | Giuseppe Maria Pignatelli, C.R. † | Bishop of Cava (de’ Tirreni), Italy |
| 25 Mar | 49.2 | Ordained Bishop | Alexandre de Chevriers de Saint-Mauris † | Bishop of Saintes, France |
| 26 Mar | 39.2 | Appointed | Franz Engelbert Barbo von Waxenstein † | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 33.7 | Ordained Priest | Johann Matthias von Eyss † | Priest of Trier, Germany | Auxiliary Bishop |
| 28 Mar | 57.2 | Died | Johann Brunetti † | Auxiliary Bishop of Wrocław (Breslau), Poland |
| Apr | | Died | Mátyás Ignác Radanay † | Bishop of Pécs, Hungary |
| 1 Apr | 65.7 | Died | Stjepan Seliščević † | Bishop of Zagreb (Agram), Croatia |
| 3 Apr | | Born | Juan Tomás de Boxadors y Sureda de San Martín, O.P. † | Barcelona, Spain | Cardinal, Cardinal-Priest of San Sisto |
| 4 Apr | | Born | Carlo Mineo † | Palermo | Bishop of Patti, Italy |
| 7 Apr | 25.3 | Ordained Priest | Carlo Filippo Incontri † | Priest | Bishop of Arezzo, Italy |
| 40.3 | Ordained Priest | Bartolomeo Massei † | Priest | Cardinal, Bishop of Ancona e Numana, Italy |
| 9 Apr | | Died | Ignacio de Urbina † | Bishop of Tlaxcala, México |
| 15 Apr | 47.9 | Ordained Bishop | George Witham † | Titular Bishop of Marcopolis | Vicar Apostolic of Northern District, England, Great Britain |
| 18 Apr | 88.3 | Died | Franciscus Liberati † | Titular Archbishop of Ephesus |
| 19 Apr | 50.9 | Selected | Wilhelm Franz Johann Bertrand von Nesselrode † | Bishop of Pécs, Hungary |
| 23 Apr | 39.3 | Appointed | Vincenzo Capece † | Archbishop of Chieti, Italy |
| 44.5 | Appointed | Niccolò Caracciolo † | Cardinal, Archbishop of Capua, Italy |
| Born | Gianbattista Colombini, O.F.M. Conv. † | Brixien | Archbishop of Benevento, Italy |
| 48.3 | Appointed | Andrea Sarnelli † | Bishop of Muro Lucano, Italy |
| 55.3 | Appointed | Francisco Zapata Vera y Morales † | Bishop of Zamora, Spain |
| 27 Apr | 34.5 | Selected | Márton Brajkovićs † | Bishop of Zagreb (Agram), Croatia |
| 28 Apr | | Born | Louis-Jacques d’Audibert de Lussan † | Baix, Ardèche | Archbishop of Bordeaux, France |
| 30 Apr | | Born | Giovan Filippo Leonardo Vitetti (Vitetta) † | Ciro | Bishop of Castellaneta, Italy |
| May | 67.6 | Died | Godefroid-Udalric de la Margelle † | Auxiliary Bishop of Köln {Cologne}, Germany |
| 1 May | 60.7 | Died | Giuseppe Catalani † | Bishop of Larino, Italy |
| 4 May | 32.2 | Confirmed | Kaspas Ignaz von Künigl zu Ehrenburg † | Bishop of Brixen {Bressanone}, Italy |
| 5 May | | Born | Martin du Bellay † | Clereau | Bishop Emeritus of Fréjus, France |
| 6 May | | Born | José de Bragança † | Lisboa | Archbishop of Braga, Portugal |
| 12 May | | Born | Juan Portugal de la Puebla † | Antequera, Spain | Titular Patriarch of Constantinople |
| 13 May | | Born | Isidoro Marín Bullón y Figueroa † | Arroyo de la Luz, Spain | Bishop of Nicaragua |
| 84.3 | Died | Daniele Scoppa, O. Carm. † | Bishop of Nola, Italy |
| 14 May | 57.0 | Confirmed | Étienne de Champflour † | Bishop of La Rochelle, France |
| 48.1 | Appointed | Gian Andrea Moscarelli † | Bishop of Guardialfiera (Guardia), Italy |
| 42.2 | Appointed | Giovanni Antonio Ruggeri † | Bishop of Vieste, Italy |
| 21 May | | Born | Felix de Paù † | Terlitien | Bishop of Tropea, Italy |
| 25 May | | Died | François Amédée Milliet de Challes † | Archbishop of Tarentaise (Moûtiers-en-Tarentaise), France |
| 28 May | | Born | Antonio Francesco de Plato † | Calabritto | Bishop of Tricarico, Italy |
| 2 Jun | 24.9 | Ordained Priest | Silvio Domenico Nicola † | Priest | Bishop of Ivrea, Italy |
| 4 Jun | 39.4 | Appointed | Franz Engelbert Barbo von Waxenstein † | Titular Bishop of Dara | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 49.2 | Appointed | Franz Julian von Braida † | Auxiliary Bishop of Olomouc (Olmütz), Czech Republic |
| 49.2 | Appointed | Franz Julian von Braida † | Titular Bishop of Hippo Diarrhytus | Auxiliary Bishop of Olomouc (Olmütz), Czech Republic |
| 44.4 | Appointed | Antonio Maria Brancaccio, C.R. † | Archbishop of Acerenza e Matera, Italy |
| 41.3 | Appointed | Pedro Francisco Levanto Vivaldo † | Auxiliary Bishop of Sevilla {Seville}, Spain | Bishop of Badajoz, Spain |
| 41.3 | Appointed | Pedro Francisco Levanto Vivaldo † | Titular Bishop of Lacedaemonia | Bishop of Badajoz, Spain |
| 62.1 | Appointed | Vincenzo Lupi, O.F.M. † | Bishop of Stagno (Ston), Croatia |
| 10 Jun | 57.1 | Ordained Bishop | Étienne de Champflour † | Bishop of La Rochelle, France |
| 13 Jun | 78.9 | Died | Stephan Weinberger † | Auxiliary Bishop of Würzburg, Germany |
| 15 Jun | | Born | José Dantas Barbosa † | Lisboa, Portugal | Auxiliary Bishop of Lisboa {Lisbon}, Portugal |
| 17 Jun | 44.5 | Ordained Bishop | Antonio Maria Brancaccio, C.R. † | Archbishop of Acerenza e Matera, Italy |
| 24 Jun | 32.3 | Ordained Bishop | Kaspas Ignaz von Künigl zu Ehrenburg † | Bishop of Brixen {Bressanone}, Italy |
| 25 Jun | 62.8 | Appointed | Gregorio Compagni, O.P. † | Bishop of Larino, Italy |
| 30.7 | Appointed | Imre Csáky † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania | Cardinal, Archbishop of Kalocsa, Hungary |
| 60.5 | Appointed | István Dolny † | Bishop of Csanád, Hungary |
| 29 Jun | | Born | Manuel José Rubio y Salinas † | Colmenar Viejo, Spain | Archbishop of México, Federal District |