| Date | Age | Event | Bishop | Title | Current Title |
| 6 Sep | 68.3 | Died | Marcos Cabello y López, O.S.A. † | Bishop of Guadix, Spain |
| 43.3 | Selected | Luigi Emmanuele Nicolo Lambruschini, B. † | Archbishop of Genova, Italy | Cardinal, Prefect of the Congregation of (Sacred) Rites |
| 12 Sep | 48.8 | Ordained Bishop | Pietro Francesco Galleffi † | Titular Archbishop of Damascus | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 71.3 | Died | Alessandro Malvasia † | Priest of the Roman Curia - Other | Cardinal, Cardinal-Priest of Santa Croce in Gerusalemme |
| 63.6 | Ordained Bishop | Domenico Pes, Sch. P. † | Bishop of Bisarchio o Bisarcio (Ozieri), Italy |
| 49.1 | Ordained Bishop | Francesco Stracchini † | Bishop of Segni, Italy |
| 13 Sep | | Born | Diego Marongiu Delrio † | | Archbishop of Sassari, Italy |
| Born | Giuseppe Maria Papardo del Parco, C.R. † | | Archbishop of Monreale, Italy |
| 15 Sep | | Born | Teofilo Massucci, O.F.M. Ref. † | | Bishop Emeritus of Syros (e Milos), Greece |
| 57.8 | Selected | Pasquale Mazzei † | Bishop of San Marco e Bisignano, Italy |
| Born | Emmanuele Staravero † | | Titular Archbishop of Dramas |
| 17 Sep | 55.4 | Selected | Jean-Joseph-Marie-Victoire de Cosnac † | Bishop of Meaux, France | Archbishop of Sens (-Auxerre), France |
| Born | Placido Pozzi † | | Bishop of Mondovi, Italy |
| 18 Sep | 22.5 | Ordained Priest | Pietro Antonio Garibaldi † | Priest | Apostolic Nuncio to France |
| 24.4 | Ordained Priest | Josef von Lipp † | Priest of Rottenburg, Germany | Bishop |
| 75.4 | Died | Francesco Milesi † | Patriarch of Venezia {Venice}, Italy |
| 24.0 | Ordained Priest | Pierre-Louis Parisis † | Priest | Bishop of Arras (-Boulogne-Saint-Omer), France |
| 23.0 | Ordained Priest | Giovanni Battista Pellei † | Priest | Bishop of Acquapendente, Italy |
| 27.7 | Ordained Priest | Tomás Miguel Pineda y Saldaña † | Priest | Bishop of San Salvador, El Salvador |
| Born | Augusto Theodoli † | | Cardinal, Cardinal-Deacon of Santa Maria della Scala |
| 19 Sep | 58.6 | Ordained Bishop | Polikarp Antoni Augustyn Marciejewski, O.P. † | Titular Bishop of Argos | Auxiliary Bishop of Sejny o Sejna o Augustów, Poland |
| 68.4 | Died | Francesco Ridolfi † | Titular Bishop of Carystus |
| 20 Sep | 39.1 | Selected | Ignác Szepesy de Négyes † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania | Bishop of Pécs, Hungary |
| 26 Sep | 69.4 | Resigned | Jean-Paul Faudoas † | Bishop of Meaux, France | Bishop Emeritus |
| 69.3 | Ordained Bishop | Etienne-Jean-Baptiste des Galois de la Tour † | Archbishop of Bourges, France |
| 31.7 | Ordained Bishop | Rudolf Johannes Joseph Rainier von Habsburg-Lotharingen † | Cardinal, Archbishop of Olomouc, Czechia |
| 27 Sep | 66.8 | Confirmed | François de Pierre de Bernis † | Archbishop of Rouen, France |
| 50.6 | Appointed | Michelangelo Buono † | Titular Bishop of Derbe |
| 61.7 | Confirmed | Pietro Carlo Ciani † | Bishop of Concordia (Sagittaria), Italy |
| 57.5 | Appointed | Giacomo Coccia † | Titular Bishop of Antinoë | Prelate of Santa Lucia del Mela, Italy |
| 55.5 | Confirmed | Jean-Joseph-Marie-Victoire de Cosnac † | Bishop of Meaux, France | Archbishop of Sens (-Auxerre), France |
| 60.4 | Elevated to Cardinal | Carlos da Cunha e Menezes † | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 52.4 | Appointed | Giovanni Francesco Falzacappa † | Titular Archbishop of Athenae | Cardinal, Prefect of the Apostolic Signatura |
| 48.7 | Confirmed | Pedro González Vallejo † | Bishop of Mallorca, Spain | Bishop Emeritus |
| 66.6 | Appointed | Giovanni Francesco Guerrieri † | Archbishop (Personal Title) of Rimini, Italy | Bishop Emeritus |
| 70.5 | Appointed | Cesare Guerrieri Gonzaga † | Cardinal-Deacon of Sant’Adriano al Foro | Cardinal, Priest of Roma {Rome}, Italy |
| 70.5 | Elevated to Cardinal | Cesare Guerrieri Gonzaga † | Cardinal, Priest of Roma {Rome}, Italy |
| 46.3 | Appointed | Józef Szczepan Koźmian † | Auxiliary Bishop of Lublin, Poland | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 46.3 | Appointed | Józef Szczepan Koźmian † | Titular Bishop of Carystus | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 43.3 | Confirmed | Luigi Emmanuele Nicolo Lambruschini, B. † | Archbishop of Genova, Italy | Cardinal, Prefect of the Congregation of (Sacred) Rites |
| 57.8 | Confirmed | Pasquale Mazzei † | Bishop of San Marco e Bisignano, Italy |
| 64.4 | Confirmed | Alessandro Maria Pagani † | Bishop of Lodi, Italy |
| 57.3 | Confirmed | José da Santíssima Trindade Leite, O.F.M. Ref. † | Bishop of Mariana, Brazil |
| 66.2 | Confirmed | Roch-Etienne de Vichy † | Bishop of Autun, France |
| 28 Sep | | Born | Charles-François-Calixte Morisson † | | Priest of Montréal, Québec, Canada |
| 81.7 | Died | Andrej (André) Szabó † | Bishop of Košice, Slovakia |
| 29 Sep | 52.4 | Ordained Bishop | Giovanni Francesco Falzacappa † | Titular Archbishop of Athenae | Cardinal, Prefect of the Apostolic Signatura |
| Born | Basilio Leto † | | Bishop Emeritus of Biella, Italy |
| Born | John Henry Luers † | | Bishop of Fort Wayne, Indiana, USA |
| 57.8 | Ordained Bishop | Pasquale Mazzei † | Bishop of San Marco e Bisignano, Italy |
| 30 Sep | 67.5 | Died | Bartolomeo Cesare † | Bishop of Potenza e Marsico Nuovo, Italy |
| Oct | 27.5 | Ordained Priest | Giovanni Sabatino (Sabatini) † | Priest | Bishop of Valva e Sulmona, Italy |
| 1 Oct | 43.3 | Appointed | Thomas Maguire † | Coadjutor Vicar Apostolic of Nova Scotia, Canada | Priest of Québec, Canada |
| 43.3 | Appointed | Thomas Maguire † | Titular Bishop of Tricomia | Priest of Québec, Canada |
| 78.7 | Resigned | Carlo Rovelli, O.P. † | Bishop of Como, Italy | Bishop Emeritus |
| 2 Oct | | Born | Gherardo Araldi † | | Bishop Emeritus of Carpi, Italy |
| 3 Oct | 74.9 | Ordained Bishop | Marc-Marie de Bombelles † | Bishop of Amiens, France |
| 43.3 | Ordained Bishop | Luigi Emmanuele Nicolo Lambruschini, B. † | Archbishop of Genova, Italy | Cardinal, Prefect of the Congregation of (Sacred) Rites |
| Born | Francesco Lönhart † | | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 60.6 | Ordained Bishop | Alexis Saussol † | Bishop of Sées {Séez}, France |
| 5 Oct | 49.0 | Selected | Arcangelo Gabriele Cela † | Bishop of Anglona-Tursi, Italy |
| 71.5 | Died | Henri de Chambre d’Urgons † | Auxiliary Bishop of Metz, France |
| 47.7 | Selected | Gabriele Papa † | Bishop of Nicastro, Italy | Archbishop of Sorrento, Italy |
| 67.5 | Selected | Giuseppe Maria Tedeschi † | Archbishop of Brindisi, Italy |
| 6 Oct | 63.7 | Died | Francesco Scipio Dondi Orologio † | Bishop of Padova {Padua}, Italy |
| 72.6 | Died | Giovanni Filippo Gallarati Scotti † | Cardinal, Cardinal-Priest of San Lorenzo in Lucina |
| 7 Oct | 40.9 | Selected | Hyacinthe-Louis de Quélen † | Coadjutor Archbishop of Paris, France | Archbishop |
| 9 Oct | 73.8 | Died | Franz Karl Joseph von Hohenlohe-Waldenburg-Schillingsfürst † | Bishop of Augsburg, Germany |
| 10 Oct | 70.5 | Appointed | Antonio Maria Doria Pamphilj † | Cardinal, Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} |
| 74.0 | Ordained Bishop | Juan Miguel Pérez González † | Bishop of Gerona, Spain |
| 12 Oct | 61.5 | Ordained Deacon | Agostino Rivarola † | Deacon of Roma {Rome}, Italy | Cardinal, Priest |
| 14 Oct | | Born | Eugène Amable Jean Claude Lachat, C.Pp.S. † | | Bishop Emeritus of Basel, Switzerland |
| 17 Oct | 63.4 | Ordained Bishop | Louis-Jules-François-Joseph d’Andigné de Mayneuf † | Bishop of Nantes, France |
| 68.2 | Ordained Bishop | Henri-Marie-Clauce de Bruc-Montplaisir † | Bishop of Vannes, France |
| Born | Julien Costes † | | Bishop Emeritus of Mende, France |
| 77.9 | Died | Joaquín González de Terán, O.P. † | Bishop Emeritus of Albarracin, Spain |
| 69.0 | Ordained Bishop | Giuseppe Manfrin Provedi † | Bishop of Chioggia, Italy |
| 19 Oct | 62.8 | Ordained Bishop | Mathias Le Groing de La Romagère † | Bishop of Saint-Brieuc, France |
| 22 Oct | 66.1 | Died | Nikodem Puzyna † | Auxiliary Bishop of Vilnius, Lithuania |
| Born | Francisco Ulloa y Larios † | | Bishop of Nicaragua |
| 23 Oct | 59.3 | Appointed | Antonio Maria (Giovanni Battista) Grandi, B. † | Secretary of the Congregation for Extraordinary Ecclesiastical Affairs |
| 24 Oct | 69.0 | Ordained Bishop | Luigi Zuppani † | Bishop of Belluno e Feltre, Italy |
| 26 Oct | 79.3 | Died | Pedro José Chávez de la Rosa † | Bishop Emeritus of Arequipa, Peru |
| 28 Oct | 60.3 | Ordained Bishop | Jean-Baptiste de Bouillé † | Bishop of Poitiers, France |
| 72.8 | Ordained Bishop | Patrick Curtis † | Archbishop of Armagh, Ireland |
| 72.3 | Died | Jean-Francis de Mallian † | Bishop-Elect of Saint-Flour, France |
| 66.3 | Ordained Bishop | Roch-Etienne de Vichy † | Bishop of Autun, France |
| 29 Oct | 24.7 | Entered | Pieter Jan Beckx, S.J. † | Priest of Society of Jesus | Superior General |
| Died | Edmond Derry † | Bishop of Dromore, Ireland |
| Nov | | Born | Pierre Bostani † | | Archbishop of Tyr (Maronite), Lebanon |
| 5 Nov | | Born | Szymon Marcin Kozłowski † | | Archbishop of Mohilev, Belarus |
| 7 Nov | 55.6 | Ordained Bishop | Jean-Joseph-Marie-Victoire de Cosnac † | Bishop of Meaux, France | Archbishop of Sens (-Auxerre), France |
| 8 Nov | | Born | Jean-Baptiste Anouilh, C.M. † | | Vicar Apostolic of Southwestern Chi-Li {Ce-Li Meridio-Occidentale}, China |
| 57.1 | Ordained Bishop | Marie-Joseph-Antoine-Laurent de la Rivoire de La Tourette † | Bishop of Valence, France |
| 10 Nov | 35.8 | Installed | José Sebastian Goyeneche y Barreda † | Bishop of Arequipa, Peru | Archbishop of Lima, Peru |
| 55.2 | Appointed | Bartholomeu de Martyribus Maya, O.C.D. † | Prelate of Mozambico |
| 11 Nov | 68.3 | Installed | Henri-Marie-Clauce de Bruc-Montplaisir † | Bishop of Vannes, France |
| 12 Nov | 76.9 | Retired | Etienne-Célestin Enoch † | Bishop of Rennes, France | Bishop Emeritus |
| 13 Nov | 61.8 | Installed | Pierre-François-Gabriel-Raymond-Ignace-Ferdinand de Bausset-Roquefort † | Archbishop of Aix, France | Archbishop of Aix (-Arles-Embrun), France |
| 14 Nov | 50.7 | Ordained Bishop | Michelangelo Buono † | Titular Bishop of Derbe |
| 34.1 | Ordained Bishop | James Doyle, O.S.A. † | Bishop of Kildare and Leighlin, Ireland |
| 17 Nov | 64.7 | Selected | Kajetan Augustyn Warteresiewicz † | Archbishop of Lviv (Armenian), Ukraine |
| 18 Nov | 59.8 | Ordained Bishop | Patrick MacMahon (McMahon) † | Titular Bishop of Fesseë | Bishop of Killaloe, Ireland |
| 19 Nov | 58.3 | Selected | Giuseppe Maria Botticelli, O.M. † | Bishop of Potenza e Marsico Nuovo, Italy | Bishop of Lacedonia, Italy |
| 22 Nov | 49.2 | Appointed | Vincenzo Macchi † | Apostolic Nuncio to France | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 59.2 | Resigned | Antonio Maria Trigona † | Archbishop of Messina, Italy | Archbishop Emeritus |
| 23 Nov | 85.0 | Died | Johann Michael Josef von Pidoll de Quitenbach † | Bishop of Le Mans, France |
| 24 Nov | 49.4 | Died | Francesco Alberini † | Bishop of Terracina, Priverno e Sezze, Italy |
| 26 Nov | 71.9 | Appointed | Henry Conwell † | Bishop of Philadelphia, Pennsylvania, USA |
| 27 Nov | 66.9 | Installed | François de Pierre de Bernis † | Archbishop of Rouen, France |
| 28 Nov | 57.6 | Ordained Bishop | Giacomo Coccia † | Titular Bishop of Antinoë | Prelate of Santa Lucia del Mela, Italy |
| 51.1 | Selected | Joseph Maria Johann Nepomuk von Fraunberg † | Bishop of Augsburg, Germany | Archbishop of Bamberg, Germany |
| Appointed | Pierre Karam Abu † | Archbishop of Beirut {Bairut} (Maronite), Lebanon |
| 30 Nov | 47.1 | Selected | Paul-Thérèse-David d’Astros † | Bishop of Saint-Flour, France | Cardinal, Archbishop of Toulouse (-Narbonne), France |
| 74.1 | Selected | Charles Mannay † | Bishop of Rennes, France |
| Dec | | Ordained Bishop | Pierre Karam Abu † | Archbishop of Beirut {Bairut} (Maronite), Lebanon |
| 1 Dec | | Born | Philipp Krementz † | | Cardinal, Archbishop of Köln {Cologne}, Germany |
| 3 Dec | 78.9 | Died | Carlo Rovelli, O.P. † | Bishop Emeritus of Como, Italy |
| 7 Dec | | Born | Marko Kalogjera (Calogerà) † | | Bishop of Split-Makarska (Spalato-Macarska), Croatia |
| 8 Dec | 23.3 | Ordained Priest | Bernardo Gárate y López de Arizmendi † | Priest of México, Federal District | Bishop of Querétaro, México |
| Born | Lodovico Leonardi † | | Bishop of Bertinoro, Italy |
| 10 Dec | 64.3 | Selected | Claude-Madeleine de La Myre-Mory † | Bishop of Le Mans, France | Bishop Emeritus |
| 12 Dec | 48.9 | Ordained Bishop | Pedro González Vallejo † | Bishop of Mallorca, Spain | Bishop Emeritus |
| 64.5 | Ordained Bishop | Pierre-Marin Rouph de Varicourt † | Bishop of Orléans, France |
| 15 Dec | 52.6 | Died | Salvator Ferro de Berardis † | Bishop of Catania, Italy |
| 16 Dec | 70.7 | Died | Romualdo Antonio Mon y Velarde † | Archbishop of Sevilla {Seville}, Spain |
| 17 Dec | 64.4 | Appointed | Ladislas Adam Prosper Burzyński, O.F.M. Ref. † | Bishop of Sandomierz, Poland |
| 49.2 | Confirmed | Arcangelo Gabriele Cela † | Bishop of Anglona-Tursi, Italy |
| 53.7 | Appointed | Alexander Dobrzański † | Auxiliary Bishop of Sandomierz, Poland |
| 53.7 | Appointed | Alexander Dobrzański † | Titular Bishop of Leontopolis in Bithynia | Auxiliary Bishop of Sandomierz, Poland |
| 51.7 | Appointed | Józef Marcelin Dzięcielski † | Auxiliary Bishop of Włocławek (Kujawy, Kalisze), Poland | Bishop of Lublin, Poland |
| 51.7 | Appointed | Józef Marcelin Dzięcielski † | Titular Bishop of Arathia | Bishop of Lublin, Poland |
| 71.4 | Appointed | Giulio Gabrielli † | Cardinal-Priest of San Lorenzo in Lucina | Cardinal, Prefect Emeritus of the Congregation of the Council |
| 55.3 | Appointed | Bernhard Galura † | Auxiliary Bishop of Brixen {Bressanone}, Italy | Bishop |
| 55.3 | Appointed | Bernhard Galura † | Titular Bishop of Anthedon | Bishop of Brixen {Bressanone}, Italy |
| 78.3 | Appointed | Szczepan Hołowczyc † | Archbishop of Warszawa {Warsaw}, Poland |
| 69.1 | Appointed | Ignazio Nasalli-Ratti † | Titular Archbishop of Cyrrhus | Cardinal, Apostolic Nuncio |
| 49.8 | Confirmed | Tomas Manoel de Noronha e Brito, O.P. † | Bishop of Cochin, India | Bishop Emeritus of Olinda, Brazil |
| 47.9 | Confirmed | Gabriele Papa † | Bishop of Nicastro, Italy | Archbishop of Sorrento, Italy |
| 41.1 | Appointed | Hyacinthe-Louis de Quélen † | Titular Archbishop of Traianopolis in Rhodope | Archbishop of Paris, France |
| 41.1 | Confirmed | Hyacinthe-Louis de Quélen † | Coadjutor Archbishop of Paris, France | Archbishop |
| 59.2 | Confirmed | Alexander (Sandor) Rudnay Divékújfalusi † | Cardinal, Archbishop of Esztergom, Hungary |
| 64.2 | Confirmed | Joaquim de Sant’Ana Carvalho † | Bishop of Faro {Algarve}, Portugal | Bishop Emeritus |
| 47.9 | Confirmed | Paulo a Santo Tomas de Aquino, O.P. † | Archbishop of Cranganore (Angamala), India |
| 67.7 | Confirmed | Giuseppe Maria Tedeschi † | Archbishop of Brindisi, Italy |
| 59.2 | Appointed | Antonio Maria Trigona † | Titular Archbishop of Caesarea in Palaestina | Archbishop Emeritus of Messina, Italy |
| 18 Dec | 23.7 | Ordained Priest | St. Laurent-Joseph-Marius Imbert, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Corea |
| 24.5 | Ordained Priest | Mellon Jolly † | Priest | Archbishop Emeritus of Sens (-Auxerre), France |
| 23.8 | Ordained Priest | William Kinsella † | Priest | Bishop of Ossory, Ireland |
| 23.5 | Ordained Priest | Michele Navazio † | Priest | Bishop of L’Aquila, Italy |
| 25.7 | Ordained Priest | Emanuele Marongiu Nurra † | Priest of Sassari, Italy | Archbishop of Cagliari, Italy |
| 19 Dec | | Born | François-Narcisse Baptifolier † | | Bishop of Mende, France |
| 49.2 | Ordained Bishop | Arcangelo Gabriele Cela † | Bishop of Anglona-Tursi, Italy |
| 60.6 | Ordained Bishop | Carlos da Cunha e Menezes † | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 69.1 | Ordained Bishop | Ignazio Nasalli-Ratti † | Titular Archbishop of Cyrrhus | Cardinal, Apostolic Nuncio |
| 64.7 | Ordained Bishop | Alessandro Maria Pagani † | Bishop of Lodi, Italy |
| 47.9 | Ordained Bishop | Gabriele Papa † | Bishop of Nicastro, Italy | Archbishop of Sorrento, Italy |
| 67.7 | Ordained Bishop | Giuseppe Maria Tedeschi † | Archbishop of Brindisi, Italy |
| 21 Dec | 63.1 | Ordained Bishop | Giovanni Nepomuceno Ferdiani † | Bishop of Iglesias, Italy |
| 23 Dec | 61.2 | Selected | Bernardino D’Avolio, O.F.M. Cap. † | Bishop of Trivento, Italy |
| 26 Dec | 27.1 | Ordained Deacon | Pietro Vargiù † | Deacon | Bishop of Ales e Terralba, Italy |
| 27 Dec | 62.3 | Ordained Bishop | João Joaquim Bernardino de Brito † | Bishop of Funchal, Portugal |
| 58.8 | Ordained Bishop | João Inácio da Fonseca Manso † | Bishop of Leiria, Portugal |
| 30 Dec | 88.6 | Died | [Antoine-Hubert Wandelaincourt] † | Bishop Emeritus of [Haute-Marne (Constitutional), France] | Bishop |