| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 69.3 | Died | Nicola Michele Abati (Abbate) † | Bishop of Squillace, Italy |
| Born | Charles Berington † | Stock Hall | Vicar Apostolic of Midland District, England, Great Britain |
| 16.0 | Professed | Joaquín Company Soler, O.F.M. † | Member of Order of Friars Minor | Archbishop of Valencia, Spain |
| Born | Henry Conwell † | Ballyriff, Ireland | Bishop of Philadelphia, Pennsylvania, USA |
| Died | Patrick French, O.F.M. † | Bishop of Elphin, Ireland |
| 22.8 | Ordained Priest | Gaspard-Augustin Laurent de Sainte-Agnčs, O.F.M. Conv. † | Priest of Order of Friars Minor Conventual | Archbishop of Tarentaise (Moűtiers-en-Tarentaise), France |
| Died | Basilio Matranga, O.S.B.M. † | Archbishop of Achrida (Ochrida), Bulgaria |
| Born | Gabriel-Melchior de Messey † | Langres | Bishop of Valence, France |
| 59.0 | Died | Simon Negri † | Bishop of Lezhë {Lesh, Alessio}, Albania |
| Born | Nicolaos Timoni † | Chios | Bishop of Chios (Scio), Greece |
| 1 Jan | 72.6 | Died | Giovanni Costantino Falletti † | Archbishop of Cagliari, Italy |
| 7 Jan | 52.2 | Died | Francesco Antonio Cavalcanti, C.R. † | Archbishop of Cosenza, Italy |
| 10 Jan | 47.0 | Confirmed | John O’Brien † | Bishop of Cloyne, Ireland | Bishop of Ross, Ireland |
| 47.0 | Confirmed | John O’Brien † | Bishop of Ross, Ireland |
| Confirmed | Richard Walsh † | Bishop of Cork, Ireland |
| 14 Jan | 52.0 | Ordained Bishop | Pál Štefan Forgách † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania | Bishop of Vác, Hungary |
| 20 Jan | 54.6 | Installed | Pedro Felipe de Azúa e Iturgoyen † | Archbishop of Santafé en Nueva Granada, Colombia | Archbishop Emeritus |
| 50.3 | Appointed | Francisco Cuartero Lumbreras † | Bishop of Segorbe, Spain |
| 21 Jan | 54.6 | Installed | Pedro Miguel Argandońa Pastene Salazar † | Bishop of Córdoba (Tucumán), Argentina | Archbishop of La Plata o Charcas, Bolivia |
| 22 Jan | 70.1 | Died | Raimondo Pecchioli, O.P. † | Bishop of Sansepolcro (Borgo San Sepolcro), Italy |
| 24 Jan | 78.0 | Died | Joseph-Louis de Cahorne de La Palun † | Bishop of Vaison, France |
| 29 Jan | 56.4 | Appointed | Giovanni Battista Baratta, C.O. † | Bishop of Novara, Italy |
| 36.8 | Appointed | Pasquale Teodoro Basta † | Bishop of Melfi e Rapolla, Italy |
| 52.1 | Confirmed | Jean-Marie de Catelan † | Bishop of Rieux, France |
| 51.7 | Appointed | Ferdinando Mandarani † | Bishop of Oppido Mamertina, Italy |
| 49.0 | Appointed | Benito Marín, O.S.B. † | Bishop of Barbastro, Spain | Bishop of Jaén, Spain |
| 33.8 | Appointed | Domenico Morelli † | Bishop of Strongoli, Italy | Bishop Emeritus |
| 44.6 | Appointed | Manuel José Rubio y Salinas † | Archbishop of México, Federal District |
| 31 Jan | 43.6 | Died | Josephus Łaszcz † | Coadjutor Bishop of Kyiv and Chernihiv (Kijów and Czernihow), Ukraine |
| Feb | 75.1 | Retired | Gaspard de La Valette de Thomas † | Bishop of Autun, France | Bishop Emeritus |
| 4 Feb | 36.8 | Ordained Bishop | Pasquale Teodoro Basta † | Bishop of Melfi e Rapolla, Italy |
| 33.8 | Ordained Bishop | Domenico Morelli † | Bishop of Strongoli, Italy | Bishop Emeritus |
| 5 Feb | | Born | Joăo António Binet Pincio † | Lisbon | Bishop Emeritus of Lamego, Portugal |
| 8 Feb | 73.3 | Resigned | Sergius Pola † | Titular Bishop of Famagusta |
| 10 Feb | | Born | Jean-Joseph-Victor de Castellane-Adhémar † | Marseille | Bishop of Senez, France |
| 14 Feb | 58.3 | Died | Georges-Lazare Berger de Charancy † | Bishop of Montpellier, France |
| 17 Feb | 71.6 | Resigned | Pietro Agostino Scorza (Scortia) † | Archbishop of Amalfi, Italy | Archbishop Emeritus |
| 18 Feb | 56.5 | Ordained Bishop | Giovanni Battista Baratta, C.O. † | Bishop of Novara, Italy |
| Born | Francisco Javier Mier y Campillo † | Alles de Peńamellera | Bishop Emeritus of Almería, Spain |
| 19 Feb | 50.3 | Appointed | Nicola Cioffi † | Archbishop of Amalfi, Italy |
| 57.2 | Appointed | José Alfonso Meléndez, O.F.M. † | Archbishop of Palermo, Italy |
| 41.5 | Appointed | Giovanni Francesco Mora, C.O. † | Titular Bishop of Famagusta | Bishop of Adria, Italy |
| 38.4 | Appointed | Gerardus a S. Joseph, O.P. † | Bishop of Malacca, Singapore |
| 51.8 | Confirmed | Leopold Maria Joseph von Spaur † | Bishop of Brixen {Bressanone}, Italy |
| 20 Feb | 78.9 | Died | Filippo Tipaldi † | Bishop of Ariano, Italy |
| 21 Feb | | Born | Antonio Bergosa y Jordán † | Jaca, Huesca, Spain | Archbishop of Tarragona, Spain |
| 77.4 | Died | Raffaele Cosimo de’ Girolami † | Cardinal, Prefect of the Congregation for Indulgences and Relics |
| 24 Feb | | Born | Fortunato Maria Pinchetti † | Rome | Bishop Emeritus of Amelia, Italy |
| 1 Mar | 45.3 | Appointed | Cosimo Pierbenedetto Maculani, C.O. † | Bishop of Terni, Italy |
| 2 Mar | | Born | Bernardo Maria Carenzoni, O.S.B. † | Brescia | Bishop of Feltre, Italy |
| 4 Mar | 57.7 | Appointed | Matías Escalzo Acedo † | Bishop of Astorga, Spain |
| 49.7 | Died | Juan Antonio Oruńa † | Bishop of Osma, Spain |
| 5 Mar | 31.7 | Appointed | Philipp Gotthard von Schaffgotsch † | Bishop of Wrocław (Breslau), Poland |
| 7 Mar | | Born | Francesco Chiarchiaro † | Palazzo Adriano | Titular Bishop of Lampsacus |
| 9 Mar | 23.0 | Ordained Priest | Giuseppe Maria Luvini, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Bishop of Pesaro, Italy |
| 11 Mar | | Born | Nicola Carelli † | Conversano | Bishop of Conversano, Italy |
| 14 Mar | 74.2 | Died | Nicolas de Malezieu † | Bishop of Lavaur, France |
| 17 Mar | 41.6 | Ordained Bishop | Giovanni Francesco Mora, C.O. † | Titular Bishop of Famagusta | Bishop of Adria, Italy |
| 18 Mar | 34.6 | Selected | Antoine de Malvin de Montazet † | Bishop of Autun, France | Archbishop of Lyon, France |
| 24 Mar | 49.2 | Ordained Bishop | Benito Marín, O.S.B. † | Bishop of Barbastro, Spain | Bishop of Jaén, Spain |
| 26 Mar | 26.2 | Ordained Priest | Krysztof Hilary Szembek † | Priest of Poznań, Poland | Bishop of Płock, Poland |
| 27 Mar | | Born | Joseph Anton Gall † | Weil der Stadt | Bishop of Linz, Austria |
| 28 Mar | 90.8 | Died | Domenico Ballati-Nerli, O.S.B. † | Bishop of Colle di Val d’Elsa, Italy |
| 30 Mar | 32.8 | Ordained Priest | Antoni Wacław Betański † | Priest | Bishop of Przemyśl, Poland |
| 22.9 | Ordained Priest | Károly Eszterházy de Galantha † | Priest | Bishop of Eger, Hungary |
| Born | Jozef Kluch † | Znióváralja | Bishop of Nitra, Slovakia |
| 31 Mar | 28.1 | Ordained Deacon | Giovanni Francesco Albani † | Deacon of San Cesareo in Palatio | Cardinal, Bishop of Ostia (-Velletri), Italy |
| Apr | | Born | Carlo Maria Rosini † | Napoli | Bishop of Pozzuoli, Italy |
| 1 Apr | 60.3 | Appointed | Francisco Díaz Santos y Bullón † | Bishop of Barcelona, Spain | Archbishop of Burgos, Spain |
| 36.5 | Appointed | Giulio Cesare Gandolfi † | Archbishop of Cagliari, Italy |
| 71.1 | Appointed | Mario Millini (Mellini) † | Cardinal, Cardinal-Priest of San Marcello |
| 61.4 | Appointed | Tommaso Sersale, C.R. † | Bishop of Potenza, Italy |
| 69.0 | Appointed | Matteo Trigona † | Titular Archbishop of Iconium | Bishop Emeritus of Siracusa, Italy |
| 2 Apr | | Born | Michel Bradács † | Kamionka | Auxiliary Bishop of Mukachevo (Munkács) (Ruthenian), Ukraine |
| 50.5 | Died | Gaetano Fraccagnani † | Bishop of Cittŕ della Pieve, Italy |
| 7 Apr | 30.3 | Selected | Jean-Baptiste-Joseph de Fontanges † | Bishop of Lavaur, France |
| 61.4 | Ordained Bishop | Tommaso Sersale, C.R. † | Bishop of Potenza, Italy |
| 11 Apr | 56.6 | Died | Giovanni Battista Baratta, C.O. † | Bishop of Novara, Italy |
| 12 Apr | 53.5 | Died | Juan Bautista Ferrer y Castro † | Bishop of Lugo, Spain |
| 17 Apr | | Born | Custodio de Santa Ana d’Almeida, O.A.D. † | Porto, Portugal | Bishop of Săo Tomé e Príncipe |
| Born | Leopold Leonhard von Thun † | Tetschen | Bishop of Passau, Germany |
| 19 Apr | 76.3 | Died | Eugénio Boto da Silva † | Auxiliary Bishop of Braga, Portugal |
| 26 Apr | | Born | Alessandro Malvasia † | Bologna, Italy | Cardinal, Cardinal-Priest of Santa Croce in Gerusalemme |
| 28 Apr | 66.3 | Died | Juraj Branjug † | Bishop of Zagreb (Agram), Croatia |
| 52.3 | Ordained Bishop | Jean-Marie de Catelan † | Bishop of Rieux, France |
| 25.4 | Ordained Priest | Benoit-Antoine Doria † | Priest | Bishop of Ajaccio, France |
| 36.6 | Ordained Bishop | Giulio Cesare Gandolfi † | Archbishop of Cagliari, Italy |
| 52.0 | Ordained Bishop | Leopold Maria Joseph von Spaur † | Bishop of Brixen {Bressanone}, Italy |
| 30 Apr | 66.7 | Died | Alessandro degli Abbati † | Bishop of Viterbo e Tuscania, Italy | Titular Bishop of Philadelphia in Arabia |
| 72.9 | Died | Otto Honorius von Egkh und Hungersbach † | Auxiliary Bishop of Olomouc (Olmütz), Czech Republic |
| 1 May | 35.0 | Ordained Bishop | Edmond Bennetat, M.E.P. † | Titular Bishop of Eucarpia | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 24.9 | Ordained Priest | Tomaz da Encarnaçăo da Costa e Lima, C.R.S.A. † | Priest of Confederation of Canons Regular of St. Augustine | Bishop of Olinda, Brazil |
| 31.8 | Ordained Bishop | Philipp Gotthard von Schaffgotsch † | Bishop of Wrocław (Breslau), Poland |
| 2 May | 64.8 | Appointed | Carlo Alberto Guidobono Cavalchini † | Prefect of the Congregation of Bishops and Regulars | Cardinal, Datary of the Apostolic Datary |
| 3 May | 79.0 | Resigned | Teodoro Pongelli (Pungelli) † | Bishop of Terni, Italy | Bishop Emeritus |
| 4 May | | Born | Gennaro Maria Guevara Suardo, O.S.B. † | Napoli | Bishop of Aversa, Italy |
| 6 May | 58.0 | Appointed | Francisco Julián de Antolino † | Bishop of Puerto Rico (Porto Rico) | Bishop of Caracas, Santiago de Venezuela |
| 48.6 | Appointed | Michele Maria Capece Galeota, C.R. † | Archbishop of Cosenza, Italy | Archbishop Emeritus of Capua, Italy |
| 31.8 | Appointed | Giuseppe Du Mesnil † | Bishop of Volterra, Italy |
| 29.6 | Appointed | Daniel Johann Anton von Gebsattel † | Auxiliary Bishop of Würzburg, Germany |
| 29.6 | Appointed | Daniel Johann Anton von Gebsattel † | Titular Bishop of Sigus | Auxiliary Bishop of Würzburg, Germany |
| 44.0 | Appointed | Franz Xaver Anton Marxer † | Auxiliary Bishop of Wien, Austria |
| 44.0 | Appointed | Franz Xaver Anton Marxer † | Titular Bishop of Chrysopolis in Arabia | Auxiliary Bishop of Wien, Austria |
| 43.9 | Appointed | Francesco Saverio Maria Queraldi y Aragona † | Bishop of Squillace, Italy |
| 47.8 | Appointed | Diego Rojas Contreras † | Bishop of Calahorra y La Calzada, Spain | Bishop of Cartagena (en Espańa) |
| 42.5 | Appointed | Isidoro Sanchez de Luna, O.S.B. † | Bishop of Ariano, Italy | Archbishop Emeritus of Salerno, Italy |
| 72.4 | Appointed | Raniero Felice Simonetti † | Archbishop (Personal Title) of Viterbo e Tuscania, Italy | Cardinal, Bishop |
| 44.0 | Appointed | Francesco Maria Testa † | Bishop of Siracusa, Italy | Archbishop of Monreale, Italy |
| 7 May | 52.4 | Resigned | Ildefonso del Tufo, O.S.B. † | Bishop of Gerace, Italy | Bishop Emeritus |
| 11 May | 57.0 | Died | Lothar Friedrich von Nalbach † | Auxiliary Bishop of Trier, Germany |
| 12 May | 48.6 | Ordained Bishop | Michele Maria Capece Galeota, C.R. † | Archbishop of Cosenza, Italy | Archbishop Emeritus of Capua, Italy |
| 45.5 | Ordained Bishop | Cosimo Pierbenedetto Maculani, C.O. † | Bishop of Terni, Italy |
| 43.9 | Ordained Bishop | Francesco Saverio Maria Queraldi y Aragona † | Bishop of Squillace, Italy |
| 42.5 | Ordained Bishop | Isidoro Sanchez de Luna, O.S.B. † | Bishop of Ariano, Italy | Archbishop Emeritus of Salerno, Italy |
| 44.0 | Ordained Bishop | Francesco Maria Testa † | Bishop of Siracusa, Italy | Archbishop of Monreale, Italy |
| 15 May | | Died | Manuel Lopes Simőes † | Bishop of Portalegre, Portugal |
| 16 May | | Born | Antonius van Alphen † | Boxtel | Vicar Apostolic of ’s Hertogenbosch (Bois-le-Duc), Netherlands |
| 78.4 | Died | Honoré-François Grimaldi de Monaco † | Archbishop Emeritus of Besançon, France |
| 18 May | 61.4 | Resigned | Guilherme de Săo José Antonio de Aranha † | Bishop of Belém do Pará, Brazil | Bishop Emeritus |
| 42.4 | Succeeded | Miguel de Bulhőes e Souza, O.P. † | Bishop of Belém do Pará, Brazil | Bishop of Leiria, Portugal |
| 19 May | 31.8 | Ordained Bishop | Giuseppe Du Mesnil † | Bishop of Volterra, Italy |
| 57.9 | Ordained Bishop | Matías Escalzo Acedo † | Bishop of Astorga, Spain |
| 22 May | | Born | Johann Prokop von Schaffgotsch † | Praha | Bishop of Ceské Budĕjovice {Budweis}, Czech Republic |
| 28 May | | Born | Lorenzo Girolamo Mattei † | Rome, Italy | Cardinal, Titular Patriarch of Antiochia {Antioch} |
| 29 May | 39.7 | Selected | Leopold Ernst von Firmian † | Coadjutor Bishop of Trento, Italy | Cardinal, Bishop of Passau, Germany |
| 31 May | 45.4 | Ordained Bishop | André-Jean-Baptiste-Dominique de Castellane † | Bishop of Glandčves, France |
| 6 Jun | 29.7 | Ordained Bishop | Daniel Johann Anton von Gebsattel † | Titular Bishop of Sigus | Auxiliary Bishop of Würzburg, Germany |
| 8 Jun | 23.4 | Ordained Priest | Francesco Brancia † | Priest | Archbishop of Chieti, Italy |
| 22.5 | Ordained Priest | Giovanni Benedetto Maria Ciuran (Civran) † | Priest | Bishop of Chioggia, Italy |
| 16 Jun | | Born | Paolo Maggiolo † | Porto Venere | Bishop of Albenga, Italy |
| 18 Jun | | Born | Antonio Dugnani † | Milan | Cardinal, Prefect of the Apostolic Signatura |
| 23 Jun | 79.5 | Died | Jean-Louis du Bouschet de Sourches † | Bishop of Dol, France |
| 25 Jun | | Born | Francesco Buonomo † | Gaeta | Bishop of Gaeta, Italy |
| 27 Jun | | Born | László Köszeghy von Romete † | Szeged | Bishop of Csanád, Hungary |
| 30 Jun | 60.6 | Ordained Bishop | Francisco Díaz Santos y Bullón † | Bishop of Barcelona, Spain | Archbishop of Burgos, Spain |
| 23.4 | Ordained Priest | Stefano (Ildefonso) Ortiz Cortes, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Mottola (Motula), Italy |