| Date | Age | Event | Bishop | Title | Current Title |
| Sep | 54.7 | Resigned | Charles-Joseph Compans de Brichanteau † | Bishop of Saint-Jean-de-Maurienne, France | Bishop Emeritus |
| 2 Sep | 53.8 | Died | Bl. Jean-Marie du Lau d’Allemans † | Archbishop of Arles, France |
| 56.3 | Died | Bl. François-Joseph de La Rochefoucauld-Bayers † | Bishop of Beauvais, France |
| 47.9 | Died | Bl. Pierre-Louis de La Rochefoucauld-Bayers † | Bishop of Saintes, France |
| 6 Sep | | Born | Mario Mattei † | Pergola, Italy | Cardinal, Bishop of Ostia (-Velletri), Italy |
| 9 Sep | 58.7 | Died | Jean-Arnauld de Castellane † | Bishop of Mende, France |
| 74.9 | Died | Bernardo Pinto Ribeiro Seixas † | Bishop of Bragança e Miranda, Portugal |
| 15 Sep | | Born | Dominco Savelli † | Speloncato, Italy | Cardinal, Priest of the Roman Curia - Other |
| 22 Sep | 28.7 | Ordained Priest | Luca Amici † | Priest | Bishop of Ferentino, Italy |
| 23.5 | Ordained Priest | Salvatore de Luca † | Priest | Archbishop of Rossano, Italy |
| 25.9 | Ordained Priest | Leopold Maximilian von Firmian (Frimian) † | Priest of Salzburg, Austria | Archbishop of Wien {Vienna}, Austria |
| 24 Sep | 53.5 | Appointed | Gregorio José de Omaña y Sotomayor † | Bishop of Antequera, Oaxaca, México |
| 53.9 | Appointed | Giambenedetto Falier, O.S.B. † | Bishop of Ceneda, Italy |
| 45.6 | Appointed | Giovanni Filippo Gallarati Scotti † | Titular Archbishop of Side | Cardinal, Prefect Emeritus of the Prefecture of the Papal Household |
| 56.8 | Appointed | Giuseppe Graziosi † | Auxiliary Bishop of Palestrina, Italy |
| 56.8 | Appointed | Giuseppe Graziosi † | Titular Bishop of Anastasiopolis | Auxiliary Bishop of Palestrina, Italy |
| 60.2 | Confirmed | Nikolaus Kondé de Póka-Telek † | Bishop of Beograd (-Smederevo), Serbia | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 36.2 | Confirmed | François Antoine Marie Constantin de Méan et de Beaurieux † | Bishop of Liège, Belgium | Archbishop of Mechelen, Belgium |
| 54.8 | Appointed | Ignacio de Salamanca † | Bishop of Cebu, Philippines |
| 46.8 | Appointed | Juan Antonio de la Virgen María (Viana), O.C.D. † | Bishop of Caracas, Santiago de Venezuela | Bishop of Almería, Spain |
| 46.9 | Appointed | Pietro Antonio Zorzi, C.R.S. † | Cardinal, Archbishop of Udine, Italy |
| 28 Sep | 66.6 | Died | François Pottier, M.E.P. † | Vicar Apostolic of Se-Ciuen (Setchoan), China |
| 49.7 | Succeeded | Jean-Didier de Saint Martin, M.E.P. † | Vicar Apostolic of Se-Ciuen (Setchoan), China |
| 30 Sep | 53.9 | Ordained Bishop | Giambenedetto Falier, O.S.B. † | Bishop of Ceneda, Italy |
| 56.8 | Ordained Bishop | Giuseppe Graziosi † | Titular Bishop of Anastasiopolis | Auxiliary Bishop of Palestrina, Italy |
| 40.3 | Ordained Bishop | Jacques-Benjamin Longer, M.E.P. † | Titular Bishop of Gortyna | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| Oct | 53.9 | Died | Giacinto Ignazio Pellegrini, O.P. † | Bishop of Krk (Veglia), Croatia |
| 2 Oct | 78.5 | Resigned | Domenico Morelli † | Bishop of Strongoli, Italy | Bishop Emeritus |
| 11 Oct | | Born | Anthony Blanc † | Sury-le-Comtal, France | Archbishop of New Orleans, Louisiana, USA |
| 14 Oct | | Ordained Bishop | Thomas Bray † | Archbishop of Cashel (-Emly), Ireland |
| 15 Oct | 48.9 | Died | Cayetano Peña Granada † | Bishop of Huesca, Spain |
| 17 Oct | | Born | Giuseppe Luca Barranco, O. de M. † | Arequipa | Auxiliary Bishop-Elect of Arequipa, Peru |
| 19 Oct | | Born | Pietro Vargiù † | Isili | Bishop of Ales e Terralba, Italy |
| 28 Oct | 53.8 | Ordained Bishop | José Calvo, O.P. † | Titular Bishop of Meloë in Lycia | Vicar Apostolic of Fo-Kien, China |
| 31 Oct | 60.3 | Died | Francesco Vincenzo Layezza (Laiezza) † | Bishop of Marsi, Italy |
| Nov | 55.0 | Appointed | Henri Reymond † | Bishop | Bishop of Dijon, France |
| 1 Nov | | Born | Luigi Ferrari † | Modena | Bishop of Modena (e Nonantola), Italy |
| 2 Nov | 76.5 | Died | Antonio Puoti † | Archbishop of Amalfi, Italy |
| Born | Engelbert Sterckx † | Ophem | Cardinal, Archbishop of Mechelen, Belgium |
| 4 Nov | | Born | Charles-Hubert Jeantet, M.E.P. † | Saint-Claude, France | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 11 Nov | 23.0 | Ordained Priest | János Horváth † | Priest | Bishop of Székesfehérvár (Albareale), Hungary |
| 12 Nov | 72.9 | Died | François de Narbonne-Lara † | Bishop of Evreux, France |
| 13 Nov | 72.3 | Died | Tiberio Borghesi † | Archbishop of Siena, Italy |
| 23 Nov | | Born | Gioacchino Antonelli † | Faella | Bishop of Fiesole, Italy |
| 26 Nov | 67.5 | Died | Johann Heinrich von Kerens, S.J. † | Bishop of Sankt Pölten, Austria |
| 2 Dec | 52.0 | Resigned | José Pérez Calama † | Bishop of Quito, Ecuador | Bishop Emeritus |
| 3 Dec | 58.1 | Appointed | Miguel Álvarez Cortés † | Bishop of Cartagena, Colombia | Bishop of Quito, Ecuador |
| Born | Emmanuele Francesco Barrutia y Croquer † | Guatemala | Auxiliary Bishop of Guatemala |
| 50.7 | Appointed | Orazio della Torre † | Bishop of Mazara del Vallo, Italy |
| 37.2 | Appointed | Joaquín de Osés y Alzúa y Caparacio † | Bishop of Santiago de Cuba | Archbishop of Santiago de Cuba |
| 63.4 | Appointed | José Fernández Díaz de la Madrid, O.F.M. † | Bishop of Quito, Ecuador |
| 52.1 | Appointed | Alfonso Marsili † | Archbishop of Siena, Italy |
| 38.2 | Appointed | Ivan Antun Sintić † | Bishop of Krk (Veglia), Croatia |
| 25.9 | Appointed | Antoine Casimir Libère de Stockem † | Auxiliary Bishop of Liège, Belgium |
| 25.9 | Appointed | Antoine Casimir Libère de Stockem † | Titular Bishop of Canopus | Auxiliary Bishop of Liège, Belgium |
| 64.9 | Appointed | Manel María Trujillo Jurado, O.F.M. † | Bishop of Albarracin, Spain | Bishop Emeritus |
| 55.6 | Appointed | Franciscus Xaverius de Vita † | Titular Bishop of Philomelium |
| 5 Dec | | Born | Francesco Spalletti † | Monte Bufo | Bishop of Nepi e Sutri, Italy |
| 9 Dec | 50.7 | Ordained Bishop | Orazio della Torre † | Bishop of Mazara del Vallo, Italy |
| 60.4 | Ordained Bishop | Nikolaus Kondé de Póka-Telek † | Bishop of Beograd (-Smederevo), Serbia | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 52.2 | Ordained Bishop | Alfonso Marsili † | Archbishop of Siena, Italy |
| 38.2 | Ordained Bishop | Ivan Antun Sintić † | Bishop of Krk (Veglia), Croatia |
| 11 Dec | 73.3 | Died | Antonino Cavaleri † | Bishop of Agrigento (Girgenti), Italy |
| 21 Dec | | Born | Giuseppe Maria Severa † | Anticoli | Bishop of Terni, Italy |
| 23 Dec | 47.2 | Ordained Bishop | Remigio de La Santa y Ortega † | Bishop of Panamá | Bishop of Lérida, Spain |
| 27 Dec | 54.8 | Died | Erasmus Dionys Krieger † | Auxiliary Bishop of Praha {Prague}, Czech Republic |