| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Died | Marianus Bogdanovich, O.F.M. † | Titular Bishop of Echinus |
| Born | Giovanni Stephano Masala † | | Former Bishop-Elect of Iglesias, Italy |
| 29.0 | Professed | Jean-Didier de Saint Martin, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Se-Ciuen (Setchoan), China |
| Born | Dominico Secondi, O.F.M. Conv. † | Barchi | Bishop Emeritus of Assisi, Italy |
| 23.1 | Ordained Priest | Gregory Stapleton † | Priest | Vicar Apostolic of Midland District, England, Great Britain |
| Born | Paulo a Santo Tomas de Aquino, O.P. † | | Archbishop of Cranganore (Angamala), India |
| 1 Jan | | Born | Giovanni Muzi † | Roma | Bishop of Città di Castello, Italy |
| Born | Gabriele Papa † | Vietri | Archbishop of Sorrento, Italy |
| Born | José Manuel Plaza de la Tejera, O.F.M. † | Riobamba | Bishop of Cuenca, Ecuador |
| 6 Jan | | Born | Giuseppe Maria Bozzi † | Rosate | Bishop of Mantova, Italy |
| 16 Jan | 52.5 | Selected | Franz Karl von Velbrück † | Bishop of Liège, Belgium |
| 18 Jan | | Born | Antonio de Franci † | Filacciano | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 37.0 | Ordained Bishop | Emmanuel-Louis de Grossoles de Flamarens † | Bishop of Quimper, France | Bishop of Périgueux (Vesuna), France |
| 22 Jan | 61.7 | Appointed | Louis-Philippe-François Mariauchau d’Esglis † | Coadjutor Bishop of Québec, Canada | Bishop |
| 61.7 | Appointed | Louis-Philippe-François Mariauchau d’Esglis † | Titular Bishop of Dorylaëum | Bishop of Québec, Canada |
| 23 Jan | 60.1 | Installed | Jean de Cairol de Madaillan † | Bishop of Grenoble, France | Bishop Emeritus |
| 75.2 | Resigned | Louis-Marie de Suarès d’Aulan † | Bishop of Acqs (Dax), France | Bishop Emeritus |
| 26 Jan | 61.9 | Died | Joannes Dominicus (Michael Antonius) Chiavassa (a S. Clara), O.C.D. † | Titular Bishop of Assuras |
| 27 Jan | 50.6 | Appointed | Antoine-René Bardonnenche † | Bishop of Vence, France |
| 60.5 | Appointed | Carl Laurenz Cardona † | Prefect of Meißen (Meissen) {Lusazia o Lausitz; Sassonia}, Germany |
| 46.2 | Appointed | Giuseppe Garampi † | Titular Archbishop of Berytus | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 43.5 | Appointed | Charles-Auguste Le Quien de La Neufville † | Bishop of Acqs (Dax), France | Bishop Emeritus |
| 34.1 | Appointed | Louis-Charles de Machaut † | Coadjutor Bishop of Amiens, France | Bishop Emeritus |
| 34.1 | Appointed | Louis-Charles de Machaut † | Titular Bishop of Europus | Bishop Emeritus of Amiens, France |
| 76.1 | Appointed | Francesco Maria Piccolomini † | Titular Archbishop of Perge | Bishop Emeritus of Pienza, Italy |
| 76.1 | Resigned | Francesco Maria Piccolomini † | Bishop of Pienza, Italy | Bishop Emeritus |
| 29 Jan | 70.9 | Installed | Antonio Alcalde y Barriga, O.P. † | Bishop of Guadalajara, Jalisco, México |
| 30 Jan | 46.0 | Appointed | Ferdinand-Marie de Lobkowitz † | Bishop of Namur {Namen}, Belgium | Bishop of Gent {Ghent, Gand}, Belgium |
| 31 Jan | | Born | José María de Jesús Belaunzarán y Ureña, O.F.M. † | México | Bishop Emeritus of Linares o Nueva León, Nuevo León, México |
| Feb | 25.5 | Ordained Priest | Jean Labartette, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 2 Feb | 24.5 | Ordained Priest | Alexander Cameron † | Priest | Vicar Apostolic Emeritus of Lowland District, Scotland, Great Britain |
| 66.3 | Ordained Bishop | Johann Wenzel Xaver Frey von Freyenfels † | Auxiliary Bishop of Olomouc (Olmütz), Czech Republic |
| 66.3 | Ordained Bishop | Joannes Wenceslaus von Freyenfels † | Titular Bishop of Marcopolis | Auxiliary Bishop of Olomouc, Czech Republic |
| 22.9 | Ordained Priest | Michele de Vincenti † | Priest | Titular Bishop of Erythrum |
| 9 Feb | 46.3 | Ordained Bishop | Giuseppe Garampi † | Titular Archbishop of Berytus | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 46.9 | Ordained Bishop | Gaspard-Augustin Laurent de Sainte-Agnès, O.F.M. Conv. † | Archbishop of Tarentaise (Moûtiers-en-Tarentaise), France |
| 39.1 | Ordained Bishop | Joaquín Santiyán Valdivieso † | Bishop of Urgell, Spain | Archbishop of Tarragona, Spain |
| 13 Feb | | Born | Ludovico Tevoli † | Morlupo, Italy | Titular Archbishop of Athenae |
| 15 Feb | | Born | Andrew Scott † | Chapelford, Enzie | Vicar Apostolic Emeritus of Western District, Scotland, Great Britain |
| 16 Feb | 71.0 | Ordained Priest | Cristóvão de Almeida Soares † | Priest | Bishop of Pinhel, Portugal |
| 22 Feb | 48.6 | Installed | Miguel António Barreto de Meneses † | Bishop of Bragança, Portugal | Bishop Emeritus of Miranda (do Douro), Portugal |
| Born | Pier Francesco Brunaccini, O.S.B. † | Messina | Archbishop of Monreale, Italy |
| 24 Feb | 75.3 | Died | Nicola Perrelli † | Cardinal, Cardinal-Deacon of San Giorgio in Velabro |
| 29 Feb | 44.5 | Appointed | Johann Baptist Joseph Gobel † | Auxiliary Bishop of Basel, Switzerland | Auxiliary Bishop Emeritus |
| 44.5 | Appointed | Johann Baptist Joseph Gobel † | Titular Bishop of Lydda | Auxiliary Bishop Emeritus of Basel, Switzerland |
| 1 Mar | 43.6 | Ordained Bishop | Charles-Auguste Le Quien de La Neufville † | Bishop of Acqs (Dax), France | Bishop Emeritus |
| 2 Mar | | Born | José Buenaventura Arias Bergara † | El Arenal | Vicar Apostolic of Mérida, Venezuela |
| 7 Mar | | Born | Thomas Penswick † | Ashton-in-Makerfield | Vicar Apostolic of Northern District, England, Great Britain |
| 13 Mar | | Born | Giovanni Bindi Sergardi † | Siena | Bishop of Montalcino, Italy |
| 14 Mar | 24.0 | Ordained Priest | Nicola Carelli † | Priest of Conversano, Italy | Bishop |
| 24.0 | Ordained Priest | Bernardo Maria Carenzoni, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Feltre, Italy |
| 39.8 | Selected | Hieronymus Joseph Franz de Paula Colloredo von Wallsee und Mels † | Archbishop of Salzburg, Austria |
| 22.1 | Ordained Deacon | Johann Nepomuk von Dankesreither † | Deacon of Order of Saint Benedict | Bishop of Sankt Pölten, Austria |
| 15 Mar | 50.7 | Ordained Bishop | Antoine-René Bardonnenche † | Bishop of Vence, France |
| 34.2 | Ordained Bishop | Louis-Charles de Machaut † | Titular Bishop of Europus | Bishop Emeritus of Amiens, France |
| 20 Mar | 61.4 | Died | Aloysius Emmanuel del Carretto † | Archbishop of Oristano, Italy |
| 46.4 | Appointed | Giuseppe Garampi † | Apostolic Nuncio to Poland | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 22 Mar | | Born | Carlo Emmanuelle Sardagna de Hohenstein † | Trento | Bishop Emeritus of Cremona, Italy |
| 27 Mar | | Born | Ignazio Ranaldi, C.O. † | Macerata | Archbishop of Urbino, Italy |
| 28 Mar | 67.2 | Died | Lucretius-Henri-François de La Tour du Pin † | Bishop of Riez, France |
| 29 Mar | | Born | Domenico Narni Mancinelli † | Nola | Bishop of Caserta, Italy |
| 30 Mar | 65.6 | Appointed | Francesco Maria Banditi, C.R. † | Bishop of Corneto (Tarquinia) e Montefiascone, Italy | Cardinal, Archbishop of Benevento, Italy |
| 60.6 | Appointed | Henricus Celaja † | Bishop of Oria, Italy |
| 48.2 | Appointed | François-Fiacre de Grave † | Bishop of Valence, France |
| 53.6 | Appointed | Giovanni Tommaso Gallarati † | Titular Bishop of Paros |
| 58.8 | Appointed | Francisco Garrido de la Vega † | Bishop of Córdoba, Spain |
| Born | Tommaso Antonio Gigli, O.F.M. Conv. † | Grottole | Bishop of Muro Lucano, Italy |
| 42.4 | Appointed | Iledfonso Núñez de Haro y Peralta † | Archbishop of México, Federal District |
| 43.2 | Appointed | Gabriel-Louis de Rougé † | Bishop of Périgueux (Vesuna), France |
| 58.3 | Appointed | Govaart-Geeraard van Eersel † | Bishop of Gent {Ghent, Gand}, Belgium |
| 52.7 | Confirmed | Franz Karl von Velbrück † | Bishop of Liège, Belgium |
| 31 Mar | 78.9 | Died | Vincenzo Acqua † | Bishop of Spoleto, Italy |
| Apr | 79.6 | Died | Dominico Maria Saporito † | Bishop of Accia and Mariana, France |
| 63.7 | Died | Luigi Satta † | Bishop of Iglesias, Italy |
| 1 Apr | | Born | Franz Ferdinand (Johann Franz) Fritz, O.S.B. † | Hildesheim | Bishop of Hildesheim, Germany |
| 2 Apr | 71.5 | Died | Pietro Budmani † | Bishop of Stagno (Ston), Croatia |
| 4 Apr | 30.4 | Ordained Priest | Niccolò Laparelli † | Priest of Cortona, Italy | Bishop |
| 25.7 | Ordained Priest | Joannes Bapt. Marchese † | Priest | Bishop of Catanzaro, Italy |
| 23.0 | Ordained Priest | Luis Ignatius Peñalver y Cárdenas † | Priest of Santiago de Cuba | Archbishop Emeritus of Guatemala |
| 24.0 | Ordained Priest | Carlo Maria Rosini † | Priest | Bishop of Pozzuoli, Italy |
| 5 Apr | 65.6 | Ordained Bishop | Francesco Maria Banditi, C.R. † | Bishop of Corneto (Tarquinia) e Montefiascone, Italy | Cardinal, Archbishop of Benevento, Italy |
| 60.6 | Ordained Bishop | Henricus Celaja † | Bishop of Oria, Italy |
| 7 Apr | | Born | Michele Amatore Lobetti † | Cuneo | Bishop of Asti, Italy |
| 12 Apr | 44.3 | Selected | François de Clugny † | Bishop of Riez, France | Bishop Emeritus |
| 14 Apr | 39.9 | Confirmed | Hieronymus Joseph Franz de Paula Colloredo von Wallsee und Mels † | Archbishop of Salzburg, Austria |
| 22 Apr | | Born | José Jorge de Torres y Estans † | Cartagena | Bishop of Nueva Pamplona, Colombia |
| 24 Apr | 64.1 | Died | José Vicente Díaz Bravo, O. Carm. † | Bishop of Durango, México |
| 26 Apr | 48.3 | Ordained Bishop | François-Fiacre de Grave † | Bishop of Valence, France |
| 43.3 | Ordained Bishop | Gabriel-Louis de Rougé † | Bishop of Périgueux (Vesuna), France |
| 52.8 | Ordained Priest | Franz Karl von Velbrück † | Priest of Liège, Belgium | Bishop |
| 29 Apr | 39.9 | Installed | Hieronymus Joseph Franz de Paula Colloredo von Wallsee und Mels † | Archbishop of Salzburg, Austria |
| 1 May | 31.0 | Ordained Priest | Lorenzo Caleppi † | Priest | Cardinal, Apostolic Nuncio to Portugal |
| 45.9 | Ordained Priest | Giovanni Lotrecchi † | Priest | Bishop of Todi, Italy |
| 2 May | 50.2 | Died | Atanasie Rednic, O.S.B.M. † | Bishop of Făgăraş (Romanian), Romania |
| 5 May | 52.8 | Ordained Bishop | Franz Karl von Velbrück † | Bishop of Liège, Belgium |
| 7 May | 75.6 | Died | Michele di Tarsia, C.P.O. † | Bishop of Conversano, Italy |
| 10 May | 46.3 | Ordained Bishop | Ferdinand-Marie de Lobkowitz † | Bishop of Namur {Namen}, Belgium | Bishop of Gent {Ghent, Gand}, Belgium |
| 17 May | | Born | Kapriel (Gabriel) Khoudeyd (Hadid) † | Alep | Bishop of Alep (Armenian), Syria |
| 57.8 | Ordained Bishop | Jakub Walerian Tumanowicz † | Titular Archbishop of Camachus | Archbishop of Lviv (Armenian), Ukraine |
| 20 May | 66.7 | Died | Giacomo Gaetano Inghirami † | Bishop of Arezzo, Italy |
| 22 May | 44.7 | Ordained Bishop | Johann Baptist Joseph Gobel † | Titular Bishop of Lydda | Auxiliary Bishop Emeritus of Basel, Switzerland |
| 75.4 | Retired | Étienne-René Potier de Gesvres † | Bishop of Beauvais, France | Cardinal, Bishop Emeritus |
| 23 May | | Born | John Murphy † | Shandon | Bishop of Cork, Ireland |
| 25 May | 57.3 | Installed | Manuel Jiménez Pérez, O.S.B. † | Bishop of Puerto Rico (Porto Rico) |
| 27 May | 75.4 | Died | Pedro Anselmo Sánchez de Tagle † | Bishop of Michoacán, México |
| 1 Jun | 51.8 | Appointed | Tiberio Borghesi † | Archbishop of Siena, Italy |
| 44.4 | Confirmed | François de Clugny † | Bishop of Riez, France | Bishop Emeritus |
| 63.5 | Appointed | Sebastianus Maria Landolina Nava † | Titular Bishop of Medea |
| 45.3 | Appointed | Francesco Maria Locatelli † | Cardinal, Bishop of Spoleto, Italy |
| 39.8 | Appointed | Johann Andreas Seelmann † | Auxiliary Bishop of Speyer, Germany |
| 39.8 | Appointed | Johann Andreas Seelmann † | Titular Bishop of Tremithus | Auxiliary Bishop of Speyer, Germany |
| 4 Jun | | Born | Antonio Podestá † | Albaro | Bishop of Saluzzo, Italy |
| Born | Francesco Tassinari † | Fava | Bishop of Urbania-Sant’Angelo in Vado, Italy |
| 6 Jun | 23.6 | Ordained Priest | Mikolaj Bykowski, O.P. † | Priest of Order of Friars Preachers | Titular Bishop of Troas |
| 69.5 | Died | Francesco Ferrante † | Bishop of Andria, Italy |
| 8 Jun | 45.3 | Ordained Bishop | Francesco Maria Locatelli † | Cardinal, Bishop of Spoleto, Italy |
| 13 Jun | 24.2 | Ordained Priest | Joseph Anton Gall † | Priest of Speyer, Germany | Bishop of Linz, Austria |
| 25.0 | Ordained Priest | Jean-Francis de Mallian † | Priest | Bishop-Elect of Saint-Flour, France |
| 24.0 | Ordained Priest | Lorenzo Girolamo Mattei † | Priest | Cardinal, Titular Patriarch of Antiochia {Antioch} |
| 62.4 | Died | Louis-Henri de Rochefort d’Ally † | Bishop of Chalons-sur-Saône, France |
| 23.7 | Ordained Priest | Felix von Stubenberg † | Priest of Salzburg, Austria | Auxiliary Bishop of Eichstätt, Germany |
| 17 Jun | | Born | Juan Antonio Díez Merino, O.P. † | Iniesta | Bishop of Menorca, Spain |
| 46.3 | Selected | Giovanni Ignazio Gautier † | Bishop of Iglesias, Italy |
| 18 Jun | 261.5 | Beatified | Bl. Paul Burali d’Arezzo, C.R. † | Cardinal, Archbishop of Napoli {Naples}, Italy |
| 21 Jun | 44.5 | Ordained Bishop | François de Clugny † | Bishop of Riez, France | Bishop Emeritus |
| 30.8 | Ordained Deacon | Szczepan Hołowczyc † | Deacon | Archbishop of Warszawa {Warsaw}, Poland |
| 22 Jun | 76.2 | Appointed | Deigo Bernardo de Peredo y Navarrete † | Bishop of Yucatán (Mérida), México |
| 46.0 | Appointed | Juan Díaz de La Guerra † | Bishop of Mallorca, Spain | Bishop of Sigüenza, Spain |
| 36.2 | Ordained Bishop | Bl. François-Joseph de La Rochefoucauld-Bayers † | Bishop of Beauvais, France |
| 42.5 | Appointed | Francesco Polesini † | Bishop of Pula (Pola), Croatia | Bishop of Poreč (Parenzo), Croatia |
| 24 Jun | | Born | Jan Cywiński † | Kobylnik | Auxiliary Bishop of Vilnius, Lithuania |
| 78.0 | Died | Scipione de’ Lorenzi † | Bishop of Larino, Italy |
| 26 Jun | 59.5 | Died | Pierre Chapelle de Jumilhac de Cubjac † | Bishop of Lectoure, France |
| 28 Jun | 46.0 | Ordained Bishop | Juan Díaz de La Guerra † | Bishop of Mallorca, Spain | Bishop of Sigüenza, Spain |
| 39.9 | Ordained Bishop | Johann Andreas Seelmann † | Titular Bishop of Tremithus | Auxiliary Bishop of Speyer, Germany |