| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 56.8 | Died | Isidro de Arevalo † | Bishop of Nueva Caceres, Philippines |
| Appointed | Niccolò Borgia † | Bishop of Cava, Italy |
| Born | John Connolly, O.P. † | Monknewtown, Ireland | Bishop of New York, New York, USA |
| 65.0 | Died | Pietro Antonio Corsignani † | Bishop of Sulmona, Italy |
| 61.0 | Ordained Bishop | Gian Alberto De' Grandi † | Bishop of Chioggia, Italy |
| Died | Giovanni Maria de Laurentiis † | Bishop of Capri, Italy |
| Died | Domenico de Liguori † | Bishop of Cava, Italy |
| 25.2 | Appointed | Giuseppe Garampi † | Prefect of the Vatican Secret Archives | Cardinal, Bishop of Montefiascone, Italy |
| Appointed | Peter Kilkelly, O.P. † | Bishop of Kilmacduagh, Ireland |
| Born | Feliks Łukasz Lewiński † | | Bishop of Podlachia o Janów, Poland |
| 51.7 | Died | Andrés Licht Barrera † | Bishop Emeritus of Guadix, Spain |
| Appointed | Marcantonio Lombardi † | Bishop of Crema, Italy |
| Born | Charles La Mothe, M.E.P. † | Sens, France | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 70.0 | Died | James O'Gallagher † | Bishop of Kildare and Leighlin, Ireland |
| Appointed | Francesco Antonio Rocco † | Bishop of Capri, Italy |
| 44.0 | Ordained Bishop | Diego Rodríguez de Rivas y Velasco † | Bishop of Comayagua, Honduras | Bishop of Guadalajara, Jalisco, México |
| 16.6 | Professed | Philipp Anton Schmidt † | Member of Society of Jesus | Auxiliary Bishop of Speyer, Germany |
| Appointed | Juan B. Tabarga † | Bishop of Panamá |
| Died | Juan B. Tabarga † | Bishop of Panamá |
| Died | Lorenzo Tartagni † | Bishop of Veroli, Italy |
| Born | Peter Waldron † | Tuam | Bishop of Killala, Ireland |
| Jan | | Died | Pierre de Beaupoil de Saint-Aulaire † | Bishop of Tarbes, France |
| 3 Jan | 49.2 | Ordained Bishop | Pedro Antonio de Barroeta Angel † | Archbishop of Lima, Peru | Archbishop of Granada, Spain |
| 14 Jan | 72.8 | Died | Juan Leandro Gómez de Parada Valdez y Mendoza † | Bishop of Guadalajara, Jalisco, México |
| 15 Jan | | Born | Pál Rosos † | Sümeg | Bishop of Veszprém, Hungary |
| 27 Jan | 55.0 | Resigned | Lodovico Calini † | Cardinal, Bishop of Crema, Italy |
| 29 Jan | | Appointed | Patrick Bradley, O.P. † | Bishop of Derry, Ireland | Bishop Emeritus |
| Feb | | Died | Thomas MacDermot † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 1 Feb | 55.0 | Appointed | Lodovico Calini † | Titular Patriarch of the unknown of Titular See | Cardinal, Bishop of Crema, Italy |
| 60.5 | Died | Mondilio (Mundillus) Orsini, C.O. † | Archbishop Emeritus of Capua, Italy |
| 2 Feb | | Died | Pedro Pardo de Figueroa † | Archbishop of Guatemala |
| 10 Feb | | Died | Jean d'Yse (d'Ize) de Saléon † | Archbishop of Vienne, France |
| 24 Feb | | Born | François Joseph Hirn † | Strasbourg | Bishop of Tournai {Doornik}, Belgium |
| 3 Mar | | Ordained Bishop | Patrick Bradley, O.P. † | Bishop of Derry, Ireland | Bishop Emeritus |
| 6 Mar | 64.8 | Died | Johann Christoph von Crass † | Auxiliary Bishop of Paderborn, Germany |
| 8 Mar | | Born | Giovanni Caccia-Piatti (Cacciapiatti) † | Novara | Cardinal, Prefect of the Roman Curia - Other |
| 15 Mar | 65.2 | Appointed | Juan Francisco Guillén † | Archbishop of Burgos, Spain |
| 57.1 | Appointed | Valentín Moran Menéndez, O. de M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop Emeritus |
| 45.0 | Confirmed | Franz Konrad Kasimir Ignaz Reichsfreiherr von Rodt † | Cardinal, Bishop of Konstanz {Constance}, Germany |
| 19 Mar | 46.4 | Appointed | Franz Heinrich Wendelin Freiherr von Kageneck † | Auxiliary Bishop of Eichstätt, Germany | Auxiliary Bishop Emeritus |
| 46.4 | Appointed | Franz Heinrich Wendelin Freiherr von Kageneck † | Titular Bishop of Comana Armeniae | Auxiliary Bishop Emeritus of Eichstätt, Germany |
| 26 Mar | | Born | Francesco Ridolfi † | Spoleto, Italy | Titular Bishop of Carystus |
| 4 Apr | 37.3 | Appointed | Gabriel Cortois de Quincey † | Bishop of Belley, France |
| 63.7 | Appointed | Guillaume d'Hugues de la Motte † | Archbishop of Vienne, France |
| 54.0 | Appointed | Jean-Antoine de Tinseau † | Bishop of Nevers, France |
| 12 Apr | 74.9 | Died | Sigismund Graf Kollonitsch † | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 46.7 | Succeeded | Johann Joseph Reichsgraf von Trautson zu Falkenstein (Trauston) † | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 15 Apr | 46.5 | Ordained Bishop | Franz Heinrich Wendelin Freiherr von Kageneck † | Titular Bishop of Comana Armeniae | Auxiliary Bishop Emeritus of Eichstätt, Germany |
| Died | Inácio de Santa Teresa, O.S.A. † | Bishop of Faro {Algarve}, Portugal |
| 18 Apr | 22.9 | Ordained Priest | Gaetano Maria Bonanno † | Priest | Bishop of Siracusa, Italy |
| 24 Apr | | Born | Marcos Cabello Lopez, O.S.A. † | Córdoba | Bishop of Guadix, Spain |
| 25 Apr | 57.2 | Ordained Bishop | Valentín Moran Menéndez, O. de M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop Emeritus |
| 2 May | | Born | Atanasio Puyal Poveda † | Alpera | Bishop of Calahorra y La Calzada, Spain |
| 12 May | 62.8 | Died | Cayetano Gil Taboada † | Archbishop of Santiago de Compostela, Spain |
| 17 May | 55.5 | Appointed | Francisco Javier de Luna Victoria y Castro † | Bishop of Panamá | Bishop of Trujillo, Peru |
| 42.7 | Appointed | Esteban Villanova Colomer † | Bishop of Jaca, Spain | Bishop of Tarazona, Spain |
| 20 May | | Born | Andrea Mastai-Ferretti † | Senigallia | Bishop of Pesaro, Italy |
| 6 Jun | | Born | Andrés Quintian Ponte de Andrade † | La Coruña, Spain | Bishop of Cuenca, Ecuador |
| 20 Jun | 40.5 | Ordained Bishop | Miguel Anselmo Álvarez de Abreu y Valdéz † | Auxiliary Bishop of Tlaxcala, Tlaxcala, México | Bishop of Antequera, Oaxaca, México |
| 32.8 | Appointed | Henri-Marie-Bernardin de Rosset de Ceilhes de Fleury † | Archbishop of Tours, France | Archbishop of Cambrai, France |
| 22 Jun | 25.5 | Ordained Priest | Francisco de São Simão, O.F.M. † | Priest of Order of Friars Minor | Bishop of Santiago de Cabo Verde |
| 28 Jun | 54.1 | Installed | Antônio da Madre de Deus Galvão, O.F.M. † | Bishop of São Paulo, Brazil |
| 29 Jun | 24.4 | Ordained Priest | Jozef Batthyány † | Priest of Esztergom, Hungary | Cardinal, Archbishop |
| 46.9 | Installed | Johann Joseph Reichsgraf von Trautson zu Falkenstein (Trauston) † | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 42.9 | Ordained Bishop | Esteban Villanova Colomer † | Bishop of Jaca, Spain | Bishop of Tarazona, Spain |
| 5 Jul | 61.2 | Appointed | Pedro Fernández Velarde † | Bishop of Segorbe, Spain |
| 17 Jul | | Appointed | Augustine Cheevers, O.S.A. † | Bishop of Ardagh (and Clonmacnois), Ireland | Bishop of Meath, Ireland |
| 19 Jul | | Born | Henri-Marie-Clauce de Bruc-Montplaisir † | Vallet | Bishop of Vannes, France |
| 37.5 | Confirmed | Gabriel Cortois de Quincey † | Bishop of Belley, France |
| Born | Pierre-Vincent Dombideau de Crouseilhes † | Pau | Bishop of Quimper, France |
| 60.9 | Appointed | Bartolomé Rajoy Losada † | Archbishop of Santiago de Compostela, Spain |
| 27 Jul | 58.8 | Ordained Bishop | Francis Petre † | Titular Bishop of Amorium | Vicar Apostolic of Northern District, England, Great Britain |
| 15 Aug | 55.7 | Installed | Francisco Javier de Luna Victoria y Castro † | Bishop of Panamá | Bishop of Trujillo, Peru |
| 22 Aug | 37.6 | Ordained Bishop | Gabriel Cortois de Quincey † | Bishop of Belley, France |
| 23 Aug | | Born | Marie-Jean-Philippe Dubourg † | Toulouse | Bishop of Limoges, France |
| Born | Viviano Orfini † | Foligno | Cardinal, Priest of the Roman Curia - Other |
| 26 Aug | 33.0 | Ordained Bishop | Henri-Marie-Bernardin de Rosset de Ceilhes de Fleury † | Archbishop of Tours, France | Archbishop of Cambrai, France |
| 29 Aug | | Appointed | Pierre de La Romagère † | Bishop of Tarbes, France |
| 31 Aug | | Died | Louis-Baltasar Phelypeaux d'Herbault † | Bishop of Riez, France |
| 1 Sep | 56.3 | Died | José Larumbe Mallí † | Bishop of Tui, Spain |
| 6 Sep | | Born | Luigi Pandolfi † | Cartoceto | Cardinal, Cardinal-Priest of S. Sabina |
| 8 Sep | | Born | Antonio Frosini † | Modena | Cardinal, Prefect Emeritus of the Congregation for Indulgences and Relics |
| 10 Sep | 44.8 | Appointed | Pietro Saverio Antonini † | Bishop of Veroli, Italy |
| 12 Sep | 61.0 | Ordained Bishop | Bartolomé Rajoy Losada † | Archbishop of Santiago de Compostela, Spain |
| 76.5 | Died | Felipe de los Tueros Huerta † | Archbishop of Granada, Spain |
| 61.4 | Ordained Bishop | Pedro Fernández Velarde † | Bishop of Segorbe, Spain |
| 19 Sep | 26.3 | Ordained Priest | Johann Heinrich von Kerens, S.J. † | Priest of Society of Jesus | Bishop of Sankt Pölten, Austria |
| 20 Sep | 36.9 | Appointed | Christoph Bartholomäus Anton Graf Migazzi † | Coadjutor Archbishop of Mechelen, Belgium | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 36.9 | Appointed | Christoph Bartholomäus Anton Graf Migazzi † | Titular Archbishop of Cartagine | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 24 Sep | | Born | François-Marie Bigex † | La Balme-de-Thuy, France | Archbishop of Chambéry, France |
| 3 Oct | 42.0 | Appointed | Jean-Baptiste de Belloy-Morangle † | Bishop of Glandèves, France | Cardinal, Archbishop of Paris, France |
| Born | Georg Franz Lock † | Wittichenau | Prefect of Meissen (Meißen) {Lusazia o Lausitz; Sassonia}, Germany |
| 10 Oct | 37.0 | Ordained Bishop | Christoph Bartholomäus Anton Graf Migazzi † | Titular Archbishop of Cartagine | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 17 Oct | | Born | Paolo Lamberto D'Allègre † | Torino | Bishop of Pavia, Italy |
| 18 Oct | 68.5 | Died | Antonio Alejandro Sarmiento Sotomayor, O.S.B. † | Bishop of Mondoñedo, Spain |
| 21 Oct | 69.2 | Died | Annibale Albani † | Bishop of Porto e Santa Rufina, Italy | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 9 Nov | 53.1 | Died | Michal Ignacy Kunicki † | Auxiliary Bishop of Kraków, Poland |
| 11 Nov | | Born | Giuseppe Maria Doria Pamphilj † | Genova, Italy | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 12 Nov | 70.9 | Died | Juan de Arechederra, O.P. † | Bishop-Elect of Nueva Segovia, Philippines |
| 17 Nov | | Born | Johann Michael von Sailer † | Aresing | Bishop of Regensburg, Germany |
| 7 Dec | | Died | Jean Baptiste de Vaccon † | Bishop of Apt, France |
| 15 Dec | 65.0 | Died | Guilherme de São José Antonio de Aranha † | Bishop Emeritus of Belém do Pará, Brazil |
| 18 Dec | 24.4 | Ordained Priest | Jean-Marie Cuchot d'Herbain † | Priest of Strasbourg, France | Auxiliary Bishop Emeritus of Trier, Germany |
| 20 Dec | 42.2 | Confirmed | Jean-Baptiste de Belloy-Morangle † | Bishop of Glandèves, France | Cardinal, Archbishop of Paris, France |
| Resigned | Patrick Bradley, O.P. † | Bishop of Derry, Ireland | Bishop Emeritus |
| 45.8 | Appointed | John Joseph Hornyold † | Coadjutor Vicar Apostolic of Midland District, England, Great Britain | Vicar Apostolic |
| 45.8 | Appointed | John Joseph Hornyold † | Titular Bishop of Philomelium | Vicar Apostolic of Midland District, England, Great Britain |
| 47.0 | Appointed | Lucretius-Henri-François de La Tour du Pin † | Bishop of Riez, France |
| 65.6 | Appointed | José Francisco de San Buenaventura Martínez de Tejada y Díez de Velasco, O.F.M. † | Bishop of Guadalajara, Jalisco, México |
| 30 Dec | 64.5 | Installed | Guillaume d'Hugues de la Motte † | Archbishop of Vienne, France |