| Date | Age | Event | Bishop | Title | Current Title |
| Sep | 68.3 | Resigned | Ludovico Valenti † | Bishop of Rimini, Italy | Cardinal, Bishop Emeritus |
| 1 Sep | 54.9 | Selected | Leopold Ernst von Firmian † | Cardinal, Bishop of Passau, Germany |
| 3 Sep | | Born | Luis García Guillén, O. de M. † | | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 4 Sep | 28.0 | Ordained Priest | Ferenc Károly Palma † | Priest | Auxiliary Bishop of Kalocsa, Hungary |
| 7 Sep | 72.4 | Died | Massenzio (dei Conti) Filo † | Bishop of Castellaneta, Italy |
| 8 Sep | 83.2 | Died | Nicolò Antonio Carafa, O.S.B. † | Bishop Emeritus of Tricarico, Italy |
| 9 Sep | | Born | Jan Jerzy Wilkxycki † | | Auxiliary Bishop of Chelmno (Culma, Kulm), Poland |
| 12 Sep | 72.2 | Died | Simon-Pierre de Lacoré (La Corée) † | Bishop of Saintes, France |
| 13 Sep | 68.6 | Selected | Patrick Fitzsimons † | Archbishop of Dublin, Ireland |
| 15 Sep | 51.7 | Ordained Bishop | Giovanni Pietro Galletti, O.S.B. † | Titular Bishop of Arcadiopolis in Asia |
| 17 Sep | 81.6 | Died | Antoni Sebastian Dembowski † | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 50.4 | Succeeded | Antoni Kazimierz Ostrowski † | Bishop of Włocławek (Kujawy, Kalisze), Poland | Archbishop of Gniezno, Poland |
| 18 Sep | 50.3 | Ordained Bishop | Francisco Garrido de la Vega † | Bishop of Mallorca, Spain | Bishop of Córdoba, Spain |
| 20 Sep | 68.7 | Confirmed | Patrick Fitzsimons † | Archbishop of Dublin, Ireland |
| 21 Sep | | Born | Serafino Matteo Ignazio Marie Carchero, O.F.M. Cap. † | | Bishop of Bisarchio o Bisarcio (Ozieri), Italy |
| 23 Sep | | Born | Giovanni Corcione † | | Bishop of Bova, Italy |
| 24 Sep | 22.9 | Ordained Priest | Alfonso Maria Freda † | Priest | Bishop of Lucera, Italy |
| 26.7 | Ordained Priest | Kasimir Johann Baptist von Häffelin † | Priest of Speyer, Germany | Cardinal, Cardinal-Priest of Sant’Anastasia |
| 24.3 | Ordained Priest | Miguel Antonio da Cruz, O.F.M. Disc. † | Priest of Order of Discalced Friars Minor | Archbishop of Braga, Portugal |
| 23.0 | Ordained Priest | Fortunado Pinto † | Priest | Archbishop of Salerno (-Acerno), Italy |
| 22.9 | Ordained Priest | Bernardo Maria Serio † | Priest of Palermo, Italy | Auxiliary Bishop |
| 25 Sep | 27.8 | Ordained Deacon | Giovanni Andrea Avogadro, S.J. † | Deacon of Society of Jesus | Bishop Emeritus of Verona, Italy |
| 58.9 | Ordained Bishop | Felipe Beltrán Serrano † | Bishop of Salamanca, Spain |
| 41.7 | Ordained Bishop | José Tormo Juliá † | Titular Bishop of Tricomia | Bishop of Orihuela, Spain |
| 25.3 | Ordained Deacon | Marco Zaguri † | Deacon | Bishop of Vicenza, Italy |
| 26 Sep | 88.2 | Appointed | Juan Manuel Jerónimo de Romaní y Carrillo † | Bishop of Cuzco, Peru |
| 55.0 | Confirmed | Leopold Ernst von Firmian † | Cardinal, Bishop of Passau, Germany |
| 55.1 | Confirmed | Luigi Satta † | Bishop of Iglesias, Italy |
| 62.3 | Confirmed | Johann Philipp von Walderdorff † | Bishop of Worms, Germany | Archbishop of Trier, Germany |
| 27 Sep | 59.7 | Ordained Bishop | Iraklij (Herakliusz) Lisanski (Lisanskyj), O.S.B.M. † | Bishop of Smoleńsk (Ukrainian), Russian Federation |
| 29 Sep | 27.9 | Ordained Priest | Giovanni Andrea Avogadro, S.J. † | Priest of Society of Jesus | Bishop Emeritus of Verona, Italy |
| 23.4 | Ordained Deacon | José Nicolau de Azevedo Coutinho Gentil † | Deacon | Prelate Emeritus of Goiás, Brazil |
| 29.8 | Ordained Deacon | Domenico Mancinforte † | Deacon | Bishop of Faenza, Italy |
| 25.3 | Ordained Priest | Marco Zaguri † | Priest | Bishop of Vicenza, Italy |
| Oct | | Born | Angelo Pietro (Andelo Petar) Galli † | | Bishop of Hvar (Lesina), Croatia |
| 2 Oct | 65.9 | Died | Claude-Antoine de Choiseul-Beaupré † | Bishop of Chalons-sur-Marne, France |
| 4 Oct | | Born | Francisco Alexandre Lobo, O.S.B. † | | Bishop of Viseu, Portugal |
| 6 Oct | 45.0 | Appointed | Joseph Philipp Franz von Spaur † | Bishop of Seckau, Austria | Bishop of Brixen {Bressanone}, Italy |
| 10 Oct | 74.7 | Died | Pierre Louis Jacquet † | Auxiliary Bishop of Liège, Belgium |
| 16 Oct | 78.0 | Died | Michele Vittorio Villa † | Bishop of Ivrea, Italy |
| 18 Oct | 69.0 | Died | Giovanni Francesco Banchieri † | Cardinal, Cardinal-Priest of Sant’Adriano al Foro |
| 68.4 | Died | Ludovico Valenti † | Cardinal, Bishop Emeritus of Rimini, Italy |
| 19 Oct | | Born | Francesco Felice Tiberi, C.O. † | | Bishop of Valva e Sulmona, Italy |
| 20 Oct | 23.5 | Ordained Priest | José Nicolau de Azevedo Coutinho Gentil † | Priest | Prelate Emeritus of Goiás, Brazil |
| 23 Oct | 36.5 | Ordained Bishop | Friedrich Wilhelm von Westphalen † | Bishop of Hildesheim, Germany |
| 25 Oct | 70.3 | Installed | Pedro Miguel Argandoña Pastene Salazar † | Archbishop of La Plata o Charcas, Bolivia |
| 61.5 | Died | Domenico Rovegno † | Archbishop of Brindisi, Italy |
| 26 Oct | 87.3 | Died | Johann Moritz Gustav von Manderscheid-Blankenheim † | Archbishop of Praha {Prague}, Czechia |
| 56.1 | Resigned | Antonín Petr Příchovský z Příchovic † | Bishop of Hradec Králové, Czechia | Archbishop of Praha {Prague}, Czechia |
| 56.1 | Succeeded | Antonín Petr Příchovský z Příchovic † | Archbishop of Praha {Prague}, Czechia |
| 28 Oct | 29.9 | Ordained Priest | Domenico Mancinforte † | Priest | Bishop of Faenza, Italy |
| 17.7 | Professed | József Mártonfi † | Member of Society of Jesus | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 29 Oct | 81.1 | Died | Nicolas François Bonhomme † | Titular Bishop of Carpasia |
| Born | Alexandre-Charles-Louis-Rose de Lostanges-Saint-Alvère † | | Bishop of Périgueux, France |
| 30 Oct | 41.8 | Selected | Charles-Antoine-Gabriel d’Osmond de Médavy † | Bishop of (Saint-Bertrand de) Comminges, France | Bishop Emeritus |
| 23.2 | Ordained Priest | Giovanni Pietro Galzigna † | Priest | Bishop of Arbe (Rab), Croatia |
| 51.5 | Selected | Germain Chasteigner de la Chasteigneraye † | Bishop of Saintes, France |
| 41.8 | Selected | François de Narbonne-Lara † | Bishop of Gap, France | Bishop of Évreux, France |
| 31 Oct | | Born | Wilhelm Arnold Günther, O. Praem. † | | Auxiliary Bishop of Trier, Germany |
| 1 Nov | | Born | Santos Gómez Marañón, O.S.A. † | | Bishop of Cebu, Philippines |
| 23.0 | Ordained Priest | Martin Görgey † | Priest | Auxiliary Bishop of Esztergom, Hungary |
| 2 Nov | 62.3 | Died | Joseph-Nicolas Deschamps de Chaumont † | Bishop of Genève {Geneva}, Switzerland |
| 5 Nov | 47.4 | Selected | Hermann Hannibal von Blümegen † | Bishop of Hradec Králové, Czechia |
| Born | Giuseppe Maria Pezzella, O.E.S.A. † | | Bishop of Calvi e Teano, Italy |
| 7 Nov | | Born | Benedict Joseph Flaget, P.S.S. † | | Bishop of Louisville, Kentucky, USA |
| 76.8 | Died | Ferdinando Romualdo Guiccioli, O.S.B. † | Archbishop of Ravenna, Italy |
| 8 Nov | 73.2 | Died | Henri-Constance de Lort de Sérignan de Valras † | Bishop of Mâcon, France |
| 9 Nov | | Born | Martin Miskólczy † | | Bishop of Knin (Tinin), Croatia |
| 12 Nov | 62.9 | Resigned | Marcin Załuski † | Auxiliary Bishop of Płock, Poland | Auxiliary Bishop Emeritus |
| 62.9 | Resigned | Marcin Załuski † | Titular Bishop of Draso | Auxiliary Bishop Emeritus of Płock, Poland |
| 13 Nov | 56.0 | Ordained Bishop | Emmerich Joseph von Breidbach zu Bürresheim † | Archbishop of Mainz, Germany |
| 16 Nov | 54.8 | Selected | Antoine de Lastic † | Bishop of Chalons-sur-Marne, France | Bishop Emeritus of (Saint-Bertrand de) Comminges, France |
| 20 Nov | 43.4 | Died | Philipp Wirich Lorenz von Daun zu Sassenheim und Callenborn † | Auxiliary Bishop of Passau, Germany |
| 21 Nov | | Born | Michele Arcangelo Del Forno † | | Bishop Emeritus of Trivento, Italy |
| Born | Johann Heinrich Milz † | | Auxiliary Bishop of Trier, Germany |
| 26.3 | Professed | Victorius (Franciscus Xaverius) Schweizer, O.C.D. † | Member of Order of Discalced Carmelites | Vicar Apostolic of Great Mogul (Mughals), India |
| 24 Nov | 23.0 | Ordained Priest | Carlo Francesco Maria Caselli, O.S.M. † | Priest of Order of Friar Servants of Mary | Cardinal, Bishop of Parma, Italy |
| 25 Nov | 50.8 | Died | Giuseppe Locatelli † | Apostolic Nuncio to Naples, Italy |
| 52.3 | Resigned | João de São José de Queiroz da Silveira, O.S.B. † | Bishop of Belém do Pará, Brazil | Bishop Emeritus |
| 27 Nov | 42.1 | Selected | Gabriel-François Moreau † | Bishop of Mâcon, France | Bishop of Autun, France |
| Born | József Vurum † | | Bishop of Nitra, Slovakia |
| 28 Nov | 80.3 | Died | Domingo Pantaleón Álvarez de Abreu † | Bishop of Tlaxcala (Puebla de los Angeles), México |
| 29 Nov | 53.2 | Selected | Giovanni Battista Coppola † | Bishop of Cassano all’Jonio, Italy |
| 74.9 | Died | Imrich I. Esterházy de Galántha † | Bishop of Nitra, Slovakia |
| 51.0 | Succeeded | Ján Gustíni-Zubrohlavský (Gusztinyi) † | Bishop of Nitra, Slovakia |
| 8 Dec | | Born | Eusebio Luciano Carvalho Gomes da Silva, C.M. † | | Bishop-Elect of Nanking [Nanjing], China |
| 9 Dec | 73.0 | Died | Antonio Fonseca † | Bishop of Jesi, Italy |
| 11 Dec | 79.4 | Died | Ramón Francisco Agustín Eura, O.S.A. † | Bishop of Orense, Spain |
| 15 Dec | 54.9 | Resigned | Antoine de Lastic † | Bishop of (Saint-Bertrand de) Comminges, France | Bishop Emeritus |
| 17 Dec | 55.0 | Ordained Priest | Simone Buonacorsi † | Priest | Cardinal, Cardinal-Priest of San Giovanni a Porta Latina |
| 23.0 | Ordained Priest | Carlo Rovelli, O.P. † | Priest of Order of Friars Preachers | Bishop Emeritus of Como, Italy |
| 23.3 | Ordained Priest | Charles-Eugène de Valperga de Maglione † | Priest | Bishop Emeritus of Nice, France |
| 19 Dec | 56.7 | Appointed | Francesco Castellini † | Bishop of Rimini, Italy |
| 60.6 | Appointed | Gianbattista Colombini, O.F.M. Conv. † | Archbishop of Benevento, Italy |
| 53.3 | Confirmed | Giovanni Battista Coppola † | Bishop of Cassano all’Jonio, Italy |
| 49.9 | Appointed | Miguel Moreno y Ollo † | Bishop of Panamá | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 66.9 | Appointed | Bernardo de Ustáriz, O.P. † | Bishop of Nueva Segovia, Philippines | Bishop-Elect |
| 21 Dec | 36.3 | Ordained Bishop | Pedro Ángel de Espiñeira, O.F.M. Obs. † | Bishop of Concepción, Chile |
| Born | Tomás La Iglesia España † | | Bishop of Zamora, Spain |
| 76.7 | Died | Costantino Serra, C.R.S. † | Bishop of Albenga, Italy |
| 57.3 | Ordained Bishop | Cristoforo Sizzo de Noris † | Bishop of Trento, Italy |
| 45.2 | Ordained Bishop | Joseph Philipp Franz von Spaur † | Bishop of Seckau, Austria | Bishop of Brixen {Bressanone}, Italy |
| 23 Dec | 54.9 | Died | Antoine de Lastic † | Bishop Emeritus of (Saint-Bertrand de) Comminges, France |
| Ordained Bishop | Maximos Fakhouri † | Bishop of Akka (Melkite Greek), Israel |
| Ordained Bishop | Jérémie Arsène Karamé † | Bishop of Damas (Melkite Greek), Syria |
| Ordained Bishop | Cyril VII (François) Siaj (Siage) † | Bishop of Bosra (Melkite Greek), Syria | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 25 Dec | 36.9 | Selected | Michel-François de Couët du Vivier de Lorry † | Bishop of Vence, France | Bishop Emeritus of La Rochelle, France |
| 27 Dec | 53.3 | Ordained Bishop | Giovanni Battista Coppola † | Bishop of Cassano all’Jonio, Italy |
| 28 Dec | 26.5 | Ordained Priest | Alexandre da Sagrada Familia Ferreira da Silva, O.F.M. Ref. † | Priest of Order of Reformed Friars Minor | Bishop of Angra, Portugal |
| 29 Dec | 54.9 | Confirmed | Antoine de Lastic † | Bishop of Chalons-sur-Marne, France | Bishop Emeritus of (Saint-Bertrand de) Comminges, France |
| 31 Dec | | Born | Louis-Charles-Auguste Hébert, M.E.P. † | | Vicar Apostolic of Madurai and Coromandel Coast, India |