| Date | Age | Event | Bishop | Title | Current Title |
| 1 Sep | | Born | Andrea Sarti † | | Bishop of Pistoia e Prato, Italy |
| 2 Sep | 51.5 | Ordained Bishop | Jean-Antoine-Marie Foulquier † | Bishop of Mende, France | Bishop Emeritus |
| 22.7 | Ordained Priest | Carlo Nocella † | Priest of Roma {Rome}, Italy | Cardinal, Titular Patriarch of Constantinople |
| 6 Sep | 78.6 | Died | Nicolás Joaquín de Arteta y Calisto † | Archbishop of Quito, Ecuador |
| 7 Sep | 66.6 | Died | James Keating † | Bishop of Ferns, Ireland |
| 8 Sep | 23.6 | Ordained Priest | Isidore-Joseph du Rousseaux † | Priest of Tournai {Doornik}, Belgium | Bishop |
| 9 Sep | 31.4 | Ordained Bishop | Luigi Celestino Spelta, O.F.M. Ref. † | Titular Bishop of Thespiae | Vicar Apostolic of Hupeh {Hu-Pè}, China |
| 16 Sep | 59.7 | Ordained Bishop | Timothy Murphy † | Bishop of Cloyne and Ross, Ireland | Bishop of Cloyne, Ireland |
| 47.9 | Ordained Bishop | Giuseppe Singlau † | Bishop of Sansepolcro (Borgo San Sepolcro), Italy |
| 17 Sep | 86.5 | Died | Pietro Angelo Luigi Pacifico Grati, O.S.M. † | Titular Bishop of Callinicum |
| 18 Sep | | Born | Giovanni Battista Boracchia † | | Bishop of Massa Marittima, Italy |
| 20 Sep | 69.5 | Selected | Antonio Lao y Cuevas † | Bishop of Guadix, Spain |
| 22 Sep | 22.7 | Ordained Priest | Antonio Maria Grasselli, O.F.M. Conv. † | Priest of Order of Friars Minor Conventual | Bishop Emeritus of Viterbo e Tuscania, Italy |
| 22.5 | Ordained Priest | Giuseppe Guarino † | Priest of Caltanissetta, Italy | Cardinal, Archbishop of Messina, Italy |
| 29.4 | Ordained Priest | Frédéric-François-Xavier Ghislain de Mérode † | Priest | Titular Archbishop of Melitene |
| 23.9 | Ordained Priest | Antonio Polin † | Priest of Treviso, Italy | Bishop of Adria, Italy |
| 25.3 | Ordained Priest | Giuseppe Spinelli † | Priest | Bishop of Caiazzo, Italy |
| 23 Sep | 90.4 | Died | Antoine de Pons de La Grange † | Bishop of Moulins, France |
| 28 Sep | 49.1 | Confirmed | Giuseppe Autelitano † | Bishop of Nusco, Italy |
| 45.6 | Appointed | Johann Anton Friedrich Baudri † | Auxiliary Bishop of Köln {Cologne}, Germany |
| 45.6 | Appointed | Johann Anton Friedrich Baudri † | Titular Bishop of Arethusa | Auxiliary Bishop of Köln {Cologne}, Germany |
| 50.9 | Confirmed | Łukasz Baraniecki † | Archbishop of Lviv, Ukraine |
| 57.9 | Appointed | Ignazio de’ Bisogno † | Auxiliary Bishop of Napoli {Naples}, Italy |
| 57.9 | Appointed | Ignazio de’ Bisogno † | Titular Bishop of Ascalon | Auxiliary Bishop of Napoli {Naples}, Italy |
| 39.8 | Appointed | Filippo Cammarota † | Auxiliary Bishop of Gaeta, Italy | Archbishop |
| 39.8 | Appointed | Filippo Cammarota † | Titular Bishop of Capharnaum | Archbishop of Gaeta, Italy |
| 44.6 | Appointed | Gaetano Carletti † | Bishop of Rieti, Italy |
| 51.8 | Confirmed | José Xavier de Cerveira e Sousa † | Bishop of Beja, Portugal | Bishop of Viseu, Portugal |
| 60.1 | Appointed | Antonio de Simone † | Titular Bishop of Dora | Titular Archbishop of Heraclea in Europa |
| 47.7 | Confirmed | Félix-Antoine-Philibert Dupanloup † | Bishop of Orléans, France |
| 45.8 | Confirmed | Carlo Giacinto Luigi Maria Fantini † | Bishop of Fossano, Italy |
| 37.4 | Confirmed | Joaquim Moreira Reis, O.S.B. † | Bishop of Angola e Congo | Bishop Emeritus |
| 40.2 | Confirmed | Livio Parladore (Parladore; Parlatore) † | Bishop of San Marco e Bisignano, Italy |
| 62.0 | Confirmed | Joaquim Pereira Ferraz, O.S.B. † | Bishop of Bragança e Miranda, Portugal | Bishop of Leiria, Portugal |
| 34.0 | Confirmed | Louis-Édouard-François-Désiré Pie † | Cardinal, Bishop of Poitiers, France |
| 61.1 | Appointed | José Elías Puyana † | Auxiliary Bishop of Popayán, Colombia | Bishop of Pasto, Colombia |
| 61.1 | Appointed | José Elías Puyana † | Titular Bishop of Corada | Bishop of Pasto, Colombia |
| 51.4 | Confirmed | Vincenzo Rozzolino † | Bishop of Caserta, Italy |
| 63.9 | Confirmed | János Keresztély Scitovszky † | Cardinal, Archbishop of Esztergom, Hungary |
| 42.8 | Confirmed | Pasquale Taccone † | Bishop of Bova, Italy | Bishop of Teramo, Italy |
| 51.2 | Confirmed | Pier Giuseppe Vaggi, O.F.M. Cap. † | Bishop of Bobbio, Italy |
| 49.7 | Appointed | Motiejus Wołonczewscki † | Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 29 Sep | | Born | Francisco do Rêgo Maia † | | Bishop Emeritus of Belém do Pará, Brazil |
| 30 Sep | 23.0 | Ordained Priest | Andreas Thiel † | Priest of Warmia (Ermland), Poland | Bishop |
| 2 Oct | | Born | Francisco Simón y Ródenas, O.F.M. Cap. † | | Bishop Emeritus of Santa Marta, Colombia |
| 7 Oct | 50.5 | Ordained Bishop | Guerr’Antonio Boscarini † | Bishop of Urbania e Sant’Angelo in Vado, Italy |
| 50.7 | Ordained Bishop | Godehard Braun † | Titular Bishop of Callinicum | Auxiliary Bishop of Trier, Germany |
| 9 Oct | | Born | Emile-Joseph Legal, O.M.I. † | | Archbishop of Edmonton, Alberta, Canada |
| 14 Oct | | Born | Ferdinand Brossart † | | Bishop Emeritus of Covington, Kentucky, USA |
| 27.7 | Ordained Priest | Louis-Joseph D’Herbomez, O.M.I. † | Priest of Oblates of Mary Immaculate | Vicar Apostolic of British Columbia, Canada |
| 42.8 | Ordained Bishop | Pasquale Taccone † | Bishop of Bova, Italy | Bishop of Teramo, Italy |
| 16 Oct | 69.1 | Died | Jakob Joseph Wandt † | Bishop of Hildesheim, Germany |
| 18 Oct | 41.8 | Selected | St. Antonio María Claret y Clará, C.M.F. † | Archbishop of Santiago de Cuba | Archbishop Emeritus |
| Born | Epifan Šanov (Scianow) † | | Vicar Apostolic Emeritus of Macedonia (Thessalonika) (Bulgarian) |
| 50.0 | Selected | Jaime José Soler y Roquer † | Bishop of Teruel, Spain |
| 20 Oct | | Born | Karl Reth † | | Auxiliary Bishop of Augsburg, Germany |
| 21 Oct | 45.9 | Ordained Bishop | Carlo Giacinto Luigi Maria Fantini † | Bishop of Fossano, Italy |
| 37.2 | Ordained Bishop | Francis Kelly † | Titular Bishop of Titiopolis | Bishop of Derry, Ireland |
| 25 Oct | | Born | Antonino Sardi † | | Bishop Emeritus of Anagni, Italy |
| 27 Oct | 55.7 | Selected | Anton Karner † | Bishop of Győr (Raab), Hungary |
| 43.4 | Selected | János Ranolder † | Bishop of Veszprém, Hungary |
| 41.2 | Resigned | Domonkos Zichy-Vásonkeö † | Bishop of Veszprém, Hungary | Bishop Emeritus |
| 29 Oct | 84.2 | Died | Alessandro Berrettini † | Bishop of Teramo, Italy |
| Born | Thomas Augustine Hendrick † | | Bishop of Cebu, Philippines |
| 1 Nov | 18.9 | Professed | Pierre-Paul Durieu, O.M.I. † | Member of Oblates of Mary Immaculate | Bishop of New Westminster, British Columbia, Canada |
| 2 Nov | 20.8 | Professed | Edward Gilpin Bagshawe, C.O. † | Member of Confederation of Oratorians of St. Philip Neri | Bishop Emeritus of Nottingham, England, Great Britain |
| 4 Nov | 49.2 | Ordained Bishop | Giuseppe Autelitano † | Bishop of Nusco, Italy |
| 5 Nov | 52.0 | Appointed | Crispino Agostinucci † | Bishop of Montefeltro, Italy |
| 43.1 | Appointed | Giulio Arrigoni, O.F.M. Ref. † | Archbishop of Lucca, Italy |
| 46.7 | Appointed | Giuseppe Antonio Giacomo Borghi, O.F.M. Cap. † | Bishop of Cortona, Italy |
| 38.5 | Succeeded | Gaetano Carli, O.F.M. Cap. † | Vicar Apostolic of Agra, India |
| 47.5 | Appointed | José de Viteri y Ungo † | Bishop of Nicaragua |
| 67.1 | Appointed | Leone Niccolai, O. Cart. † | Bishop of Pistoia e Prato, Italy |
| 42.2 | Confirmed | Ignazio Maria Selitti † | Bishop of Melfi e Rapolla, Italy | Bishop Emeritus |
| 6 Nov | 38.4 | Selected | Pierre-Simon-Louis-Marie de Dreux-Brézé † | Bishop of Moulins, France |
| 9 Nov | 21.3 | Professed | William Benedict Scarisbrick, O.S.B. † | Member of Order of Saint Benedict | Bishop Emeritus of Port-Louis, Mauritius |
| 11 Nov | 16.8 | Professed | Antonio Colomer, O.P. † | Member of Order of Friars Preachers | Vicar Apostolic of Northern Tonking {Tonkino Settentrionale}, Viet Nam |
| 47.5 | Selected | Angelo Fusinato † | Bishop of Concordia (Sagittaria), Italy |
| 51.2 | Selected | Antonio Novasconi † | Bishop of Cremona, Italy |
| 49.2 | Selected | Angelo Francesco Ramazzotti † | Bishop of Pavia, Italy | Patriarch of Venezia {Venice}, Italy |
| 13 Nov | 55.3 | Resigned | Giuseppe Menditto † | Bishop of Noto, Italy | Bishop Emeritus |
| 14 Nov | | Born | Denis Hallinan † | | Bishop of Limerick, Ireland |
| 15 Nov | | Born | Letterio D’Arrigo Ramondini † | | Archbishop of Messina, Italy |
| 18 Nov | 40.4 | Ordained Bishop | Livio Parladore (Parladore; Parlatore) † | Bishop of San Marco e Bisignano, Italy |
| 34.7 | Selected | Josip Juraj Strossmayer † | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 20 Nov | 43.2 | Appointed | Charles Pius Montgomery, O.P. † | Bishop of Monterey, California, USA | Priest of Order of Friars Preachers |
| 23 Nov | 22.4 | Ordained Priest | Charles-Émile Freppel † | Priest of Strasbourg, France | Bishop of Angers, France |
| 64.0 | Appointed | János Keresztély Scitovszky † | Apostolic Administrator of Pécs, Hungary | Cardinal, Archbishop of Esztergom, Hungary |
| 25 Nov | 34.1 | Ordained Bishop | Louis-Édouard-François-Désiré Pie † | Cardinal, Bishop of Poitiers, France |
| 27 Nov | 62.2 | Appointed | Myles Murphy † | Bishop of Ferns, Ireland |
| 52.9 | Selected | Eduard Jakob Wedekin † | Bishop of Hildesheim, Germany |
| 28 Nov | | Born | Georges-Jean-Damascène Lachavanne, O.F.M. Cap. † | | Bishop of Port Victoria o Seychelles |
| Born | José de Jesús Ortíz y Rodríguez † | | Archbishop of Guadalajara, Jalisco, México |
| 29 Nov | | Born | Gregorio Nacianceno Hoyos Yarza † | | Bishop of Manizales, Colombia |
| 30 Nov | 40.9 | Ordained Bishop | Antonio Di Stefano, O.F.M. Conv. † | Titular Bishop of Benda | Vicar Apostolic Emeritus of Moldavia |
| 77.9 | Died | Giovanni Alessandro Muzi † | Bishop of Città di Castello, Italy |
| 1 Dec | 37.9 | Died | Alexandre-Hippolyte-Xavier Monnet, C.S.Sp. † | Vicar Apostolic of Madagascar, Madagascar |
| 2 Dec | 67.0 | Resigned | Josip Kuković † | Bishop of Bosna (Djakovo) et Srijem, Croatia | Bishop Emeritus |
| 4 Dec | 56.0 | Selected | Manuel Martins Manso † | Bishop of Funchal, Portugal | Bishop of Guarda, Portugal |
| 5 Dec | | Born | Jeremiah Joseph Doyle † | | Bishop of Lismore, Australia |
| 7 Dec | | Born | Paulin-Pierre Andrieu † | | Cardinal, Archbishop of Bordeaux, France |
| 8 Dec | 85.3 | Died | Paul Louis Joseph D’Hautpoul † | Bishop Emeritus of Cahors, France |
| 22.8 | Ordained Priest | Paolo Giuseppe Maria Serci Serra † | Priest | Archbishop of Cagliari, Italy |
| 51.4 | Ordained Bishop | Pier Giuseppe Vaggi, O.F.M. Cap. † | Bishop of Bobbio, Italy |
| 9 Dec | 47.9 | Ordained Bishop | Félix-Antoine-Philibert Dupanloup † | Bishop of Orléans, France |
| 67.1 | Ordained Bishop | Leone Niccolai, O. Cart. † | Bishop of Pistoia e Prato, Italy |
| 10 Dec | 69.4 | Died | Sebastiano Soldati † | Bishop of Treviso, Italy |
| 11 Dec | 47.9 | Installed | Félix-Antoine-Philibert Dupanloup † | Bishop of Orléans, France |
| Born | Henry K. Moeller † | | Archbishop of Cincinnati, Ohio, USA |
| 13 Dec | 46.8 | Appointed | Anastasius (Alois) Hartmann, O.F.M. Cap. † | Vicar Apostolic of Bombay, India | Vicar Apostolic Emeritus |
| 40.6 | Selected | Friedrich Johann Joseph Cölestin zu von Schwarzenberg † | Cardinal, Archbishop of Praha {Prague}, Czechia |
| 14 Dec | 16.0 | Professed | St. Grégoire Grassi, O.F.M. Obs. † | Member of Order of Observant Friars Minor | Vicar Apostolic of Northern Shansi {Scian-Si Settentrionale}, China |
| 15 Dec | 63.7 | Died | José María Arriaga † | Bishop of Chachapoyas, Peru |
| 16 Dec | 58.1 | Ordained Bishop | Ignazio de’ Bisogno † | Titular Bishop of Ascalon | Auxiliary Bishop of Napoli {Naples}, Italy |
| 42.3 | Ordained Bishop | Ignazio Maria Selitti † | Bishop of Melfi e Rapolla, Italy | Bishop Emeritus |
| 19 Dec | | Born | Célestin-Félix-Joseph Chouvellon, M.E.P. † | | Vicar Apostolic of Eastern Szechwan {Se-Ciuen Orientale}, China |
| 36.1 | Died | Pierre Nicolaus Lavaissière, C.M. † | Vicar Apostolic of Chekiang {Ce-Kiam}, China |
| 49.0 | Resigned | Giuseppe Pappalardo † | Archbishop of Conza e Campagna, Italy | Archbishop Emeritus |
| 22 Dec | 25.4 | Ordained Priest | Victor-Jean-François-Paulin Delannoy † | Priest | Bishop of Aire et Dax, France |
| 25.5 | Ordained Priest | Jean-Baptiste-Théodore Duval † | Priest | Bishop of Soissons (-Laon), France |
| 22.8 | Ordained Priest | Tommaso Maria Martinelli, O.E.S.A. † | Priest of Order of Hermits of St. Augustine | Cardinal, Prefect of the Congregation of the Index |
| 23.7 | Ordained Priest | José Francisco Ezequiel Moreyra † | Priest of Lima, Peru | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 24.0 | Ordained Priest | Mariano Palermo † | Priest | Bishop of Piazza Armerina, Italy |
| 55.9 | Resigned | Diego Planeta † | Archbishop of Brindisi, Italy | Archbishop Emeritus |
| 22.6 | Ordained Priest | Denis (Alphonse) Steyaert, O.C.D. † | Priest of Order of Discalced Carmelites | Titular Archbishop of Damascus |
| 26.2 | Ordained Priest | Odon Thibaudier † | Priest of Lyon (-Vienne), France | Archbishop of Cambrai, France |
| 23 Dec | 60.4 | Ordained Bishop | Antonio de Simone † | Titular Bishop of Dora | Titular Archbishop of Heraclea in Europa |
| 33.6 | Ordained Priest | Johann Baptist Franzelin, S.J. † | Priest of Society of Jesus | Cardinal, Prefect of the Congregation for Indulgences and Relics |
| 24 Dec | | Born | Charles-Henri-Célestin Gibier † | | Bishop of Versailles, France |
| 30 Dec | 43.2 | Ordained Bishop | Giulio Arrigoni, O.F.M. Ref. † | Archbishop of Lucca, Italy |
| 46.0 | Succeeded | Miguel Calderón, O.P. † | Vicar Apostolic of Fo-Kien, China |
| Born | Michel-Thomas Labrecque † | | Bishop Emeritus of Chicoutimi, Québec, Canada |
| 31 Dec | 40.1 | Ordained Bishop | Filippo Cammarota † | Titular Bishop of Capharnaum | Archbishop of Gaeta, Italy |