| Date | Age | Event | Bishop | Title | Current Title | 
| Oct |  | Born | Peter (Pierce) Michael Comerford † |  | Priest of San Francisco, California, USA | 
| 43.7 | Ordained Bishop | Myles Prendergast, O.C.D. † | Titular Bishop of Centuria | Vicar Apostolic Emeritus of Verapoly, India | 
| 1 Oct |  | Born | Domenico Maria Villa † |  | Bishop of Parma, Italy | 
| 2 Oct | 68.0 | Appointed | Giuseppe Andrea Albani † | Cardinal-Deacon of Sant’Eustachio | Cardinal, Librarian of the Vatican Library | 
| 59.2 | Confirmed | Girolamo Aprile e Benso † | Bishop of Piazza Armerina, Italy | 
| 59.5 | Appointed | Antonio Maria Borghi † | Bishop of Narni, Italy | 
| 65.5 | Confirmed | Domenico Antonio Cimaglia † | Bishop of Molfetta, Italy | 
| 50.1 | Appointed | Carlo Filesio Cittadini † | Bishop of Perugia, Italy | 
| 74.1 | Appointed | Giulio Maria della Somaglia † | Cardinal-Priest of San Lorenzo in Damaso | Cardinal, Librarian of the Vatican Library | 
| 53.3 | Appointed | Antonio Fernando José de Echánove y Zaldívar † | Titular Archbishop of Nicosia | Archbishop of Tarragona, Spain | 
| 68.2 | Appointed | Fabiano Giuseppe Giacomo Luigi Galliani, O.F.M. Cap. † | Titular Bishop of Pergamum | 
| 61.9 | Confirmed | Paolo Garzilli † | Bishop of Bovino, Italy | Bishop of Sessa Aurunca, Italy | 
| 60.5 | Confirmed | Adam Friedrich von Groß zu Trockau † | Bishop of Würzburg, Germany | 
| 62.6 | Confirmed | Baldassare Leone † | Bishop of Agrigento (Girgenti), Italy | 
| 63.4 | Appointed | Stanislao Lucchesi † | Bishop of Foligno, Italy | 
| 48.0 | Appointed | Vincenzo Macchi † | Titular Archbishop of Nisibis | Cardinal, Cardinal-Bishop of Ostia (e Velletri) | 
| 61.2 | Appointed | Ambrosi de Magistris † | Auxiliary Bishop of Napoli {Naples}, Italy | 
| 61.2 | Appointed | Ambrosi de Magistris † | Titular Bishop of Chersonesus in Creta | Auxiliary Bishop of Napoli {Naples}, Italy | 
| 63.9 | Appointed | Franciszek Skarbek von Malczewski † | Archbishop of Warszawa {Warsaw}, Poland | 
| 59.0 | Appointed | Giulio Mami † | Bishop of Città della Pieve, Italy | 
| 41.0 | Appointed | Giuseppe Mancini † | Bishop of Massa Marittima, Italy | Archbishop of Siena, Italy | 
| 61.7 | Appointed | Bartolomeo Pacca † | Cardinal-Priest of San Lorenzo in Lucina | Cardinal, Secretary of the Congregation for Universal Inquisition | 
| 59.8 | Appointed | Francesco Saverio (François-Xavier) Pereira † | Bishop of Rieti, Italy | 
| 75.9 | Confirmed | Ludovico Maria Roselli, O.F.M. Ref. † | Bishop of Gravina e Irsina (Montepeloso), Italy | Bishop-Elect | 
| 50.2 | Appointed | Leonardo Santander y Villavicencio † | Bishop of Quito, Ecuador | Bishop of Astorga, Spain | 
| 63.8 | Confirmed | Gregor Tarkovič (Tárkovits) † | Bishop of Prešov (Prjašev, Eperjes) (Slovak), Slovakia | 
| 55.6 | Confirmed | Joseph Walland † | Archbishop of Gorizia e Gradisca, Italy | 
| 62.4 | Appointed | Guilelmus Zerbi † | Auxiliary Bishop of Sabina (-Farfa), Italy | Auxiliary Bishop of Milano {Milan}, Italy | 
| 62.4 | Appointed | Guilelmus Zerbi † | Titular Bishop of Abydus | Auxiliary Bishop of Milano {Milan}, Italy | 
| 3 Oct | 50.5 | Died | Antônio Rodrigues de Aguiar † | Prelate of Goiás, Brazil | 
 | Born | Leopoldo Angelo Santanchè, O.F.M. Ref. † |  | Bishop of Fabriano e Matelica, Italy | 
| 69.9 | Died | Juan Raimundo Santos Larumbe y Larrayoz † | Bishop of Tudela, Spain | 
| 4 Oct | 59.5 | Ordained Bishop | Antonio Maria Borghi † | Bishop of Narni, Italy | 
| 50.1 | Ordained Bishop | Carlo Filesio Cittadini † | Bishop of Perugia, Italy | 
| 62.6 | Ordained Bishop | Baldassare Leone † | Bishop of Agrigento (Girgenti), Italy | 
| 63.4 | Ordained Bishop | Stanislao Lucchesi † | Bishop of Foligno, Italy | 
| 48.0 | Ordained Bishop | Vincenzo Macchi † | Titular Archbishop of Nisibis | Cardinal, Cardinal-Bishop of Ostia (e Velletri) | 
| 59.0 | Ordained Bishop | Giulio Mami † | Bishop of Città della Pieve, Italy | 
| 41.0 | Ordained Bishop | Giuseppe Mancini † | Bishop of Massa Marittima, Italy | Archbishop of Siena, Italy | 
| 55.0 | Ordained Bishop | Jan Jerzy Wilkxycki † | Titular Bishop of Flaviopolis | Auxiliary Bishop of Chelmno (Culma, Kulm), Poland | 
| 62.4 | Ordained Bishop | Guilelmus Zerbi † | Titular Bishop of Abydus | Auxiliary Bishop of Milano {Milan}, Italy | 
| 7 Oct | 77.9 | Appointed | Joseph von Stubenberg † | Apostolic Administrator of Eichstätt, Germany | Archbishop of Bamberg, Germany | 
| 8 Oct | 71.2 | Selected | Giovanni Battista Bolognese † | Bishop of Termoli, Italy | Bishop of Andria, Italy | 
| 54.5 | Selected | Giuseppe Maria Pellicano † | Bishop of Gerace, Italy | 
| 50.9 | Selected | Francesco Saverio Triggiani, O.F.M. Conv. † | Bishop of Oria, Italy | Bishop Emeritus | 
| 9 Oct | 55.5 | Died | Emanuel Maria Thun † | Bishop of Trento, Italy | 
| 10 Oct | 65.8 | Selected | Jean-Baptiste-Marie Aubriot de la Palme † | Bishop of Aosta, Italy | Bishop Emeritus | 
| 56.5 | Selected | Bernardino Giovanni Battista Bollati, O.F.M. Obs. † | Bishop of Biella, Italy | 
| 60.8 | Selected | Carlo Francesco Carnevale † | Bishop of Tortona, Italy | 
| 64.7 | Selected | Columbano Giovanni Battista Carlo Gaspare Chiaverotti, O.S.B. † | Archbishop of Torino {Turin}, Italy | 
| 11 Oct | 60.1 | Ordained Bishop | Cristóbal Bencomo Rodríguez † | Titular Archbishop of Heraclea in Europa | 
 | Born | Martin Crane, O.E.S.A. † |  | Bishop of Sandhurst, Australia | 
| 68.3 | Ordained Bishop | Fabiano Giuseppe Giacomo Luigi Galliani, O.F.M. Cap. † | Titular Bishop of Pergamum | 
| 12 Oct |  | Born | Mariano Ortiz y Urruela † |  | Coadjutor Bishop of San Salvador, El Salvador | 
| 15 Oct | 75.9 | Died | Ludovico Maria Roselli, O.F.M. Ref. † | Bishop-Elect of Gravina e Irsina (Montepeloso), Italy | 
| 18 Oct | 23.8 | Ordained Priest | Jean-Marie Doney † | Priest of Besançon, France | Bishop of Montauban, France | 
| 19 Oct | 70.3 | Died | Antonio Dugnani † | Cardinal, Prefect of the Apostolic Signatura | 
| 22 Oct |  | Born | Victor José Díez Navarrete † |  | Bishop of Barquisimeto, Venezuela | 
| 23 Oct |  | Born | Gaetano Alimonda † |  | Cardinal, Archbishop of Torino {Turin}, Italy | 
| 25 Oct | 62.1 | Died | Etienne-Hubert de Cambacérès † | Cardinal, Archbishop of Rouen, France | 
| 24.6 | Ordained Deacon | Alexandru Dobra † | Deacon | Bishop of Lugoj (Romanian), Romania | 
| 26 Oct |  | Born | St. José María Díaz Sanjurjo, O.P. † |  | Vicar Apostolic of Central Tonking {Tonkino Centrale}, Viet Nam | 
| 28 Oct | 78.8 | Died | Salvatore Vecchioni, C.O. † | Bishop of Anglona-Tursi, Italy | 
| 31 Oct | 42.4 | Selected | Joaquim de Nossa Senhora de Nazareth Oliveira e Abreu, O.F.M. Ref. † | Bishop of São Luís do Maranhão, Brazil | Bishop of Coimbra, Portugal | 
| 1 Nov | 24.7 | Ordained Priest | Alexandru Dobra † | Priest | Bishop of Lugoj (Romanian), Romania | 
| 61.3 | Ordained Bishop | Ambrosi de Magistris † | Titular Bishop of Chersonesus in Creta | Auxiliary Bishop of Napoli {Naples}, Italy | 
| 8 Nov | 24.2 | Ordained Priest | Louis Delcusy † | Priest | Bishop of Viviers, France | 
| 78.2 | Died | Joaquín Encabo de la Virgen de Sopetrán, O.A.R. † | Bishop of Cebu, Philippines | 
| 9 Nov | 59.5 | Selected | Carlos da Cunha e Menezes † | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal | 
| 11 Nov | 54.0 | Resigned | Adolphus Louis Barth de Walbach † | Bishop-Elect of Philadelphia, Pennsylvania, USA | Former Bishop-Elect | 
| 56.9 | Selected | Fernando Cano Almirante, O.F.M. Obs. † | Bishop of Antioquía, Colombia | Bishop of Islas Canarias {Canary Islands}, Spain | 
| 12 Nov |  | Born | João Antônio dos Santos † |  | Bishop of Diamantina, Brazil | 
| 56.4 | Selected | José da Santíssima Trindade Leite, O.F.M. Ref. † | Bishop of Mariana, Brazil | 
| 14 Nov | 73.1 | Died | Remigio de La Santa y Ortega † | Bishop of Lérida, Spain | 
| 16 Nov | 86.4 | Died | Roberto Costaguti † | Bishop of Sansepolcro (Borgo San Sepolcro), Italy | 
| 22 Nov | 54.8 | Ordained Bishop | Francisco Albán Barreiro, O.P. † | Bishop of Nueva Segovia, Philippines | 
 | Born | Giuseppe Marzorati † |  | Bishop of Como, Italy | 
| 55.8 | Ordained Bishop | Joseph Walland † | Archbishop of Gorizia e Gradisca, Italy | 
| 23 Nov | 57.7 | Selected | João Inácio da Fonseca Manso † | Bishop of Leiria, Portugal | 
| 28 Nov | 60.2 | Selected | Bartolomeo Goglia † | Bishop of Sant’Angelo dei Lombardi e Bisaccia, Italy | 
| 67.0 | Selected | Vincenzo Maria Manieri, O.F.M. Conv. † | Bishop of Ruvo e Bitonto, Italy | 
| 44.4 | Selected | Cassiodoro Margarita † | Bishop of Gravina e Irsina (Montepeloso), Italy | 
| 45.6 | Selected | Giovanni Battista Tomasuolo † | Bishop of Nicotera e Tropea, Italy | Bishop Emeritus | 
| 29 Nov | 59.9 | Appointed | Emmanuele de Gregorio † | Prefect of the Congregation of Ecclesiastical Immunity | Cardinal, Major Penitentiary of the Apostolic Penitentiary | 
| 74.3 | Appointed | Benedetto Naro † | Prefect of the Congregation of the Index | Cardinal, Prefect of the Roman Curia - Other | 
| 61.9 | Appointed | Bartolomeo Pacca † | Prefect of the Congregation of Bishops and Regulars | Cardinal, Secretary of the Congregation for Universal Inquisition | 
| 4 Dec | 48.3 | Selected | Emmanuele Lodi, O.P. † | Bishop of Udine, Italy | 
| 68.1 | Selected | Giuseppe Manfrin Provedi † | Bishop of Chioggia, Italy | 
| 62.8 | Died | [Siméon-Stylite-François-Régis Rovère] † | Bishop Emeritus of [Vaucluse (Constitutional), France] | 
| 6 Dec |  | Born | François-Antoine-Marie-Ambroise-Benjamin Baduel † |  | Bishop of Saint-Flour, France | 
| 8 Dec |  | Born | Ljudevit Ćurčija, O.F.M. Obs. † |  | Vicar Apostolic Emeritus of Egypt (Egitto), Egypt | 
| 12 Dec | 72.6 | Died | Bernardo Nadal Crespí † | Bishop of Mallorca, Spain | 
| 13 Dec | 68.3 | Died | Pedro Inocencio Bejarano † | Bishop of Sigüenza, Spain | 
| 15 Dec | 58.4 | Died | Joseph Ludwig Colmar † | Bishop of Mainz, Germany | 
| 16 Dec |  | Born | Christophore Cosandey † |  | Bishop of Lausanne et Genève, Switzerland | 
 | Born | Alessio Maria Filippi, O.F.M. Ref. † |  | Vicar Apostolic of Southwestern Hupeh {Hu-Pè Occiduo-Meridionale}, China | 
| 19 Dec | 24.7 | Ordained Priest | Raffaele Ferrigno † | Priest | Archbishop of Brindisi, Italy | 
| 26.1 | Ordained Priest | Charles-Hubert Jeantet, M.E.P. † | Priest of La Société des Missions Etrangères | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam | 
| 24.4 | Ordained Priest | René-François Régnier † | Priest of Angers, France | Cardinal, Archbishop of Cambrai, France | 
| 20 Dec |  | Born | Tommaso Mesmer † |  | Bishop of Terracina, Priverno e Sezze, Italy | 
| 21 Dec | 78.7 | Confirmed | Matteo Aceto † | Bishop of Nusco, Italy | Bishop-Elect | 
| 56.7 | Confirmed | Bernardino Giovanni Battista Bollati, O.F.M. Obs. † | Bishop of Biella, Italy | 
| 57.0 | Confirmed | Fernando Cano Almirante, O.F.M. Obs. † | Bishop of Antioquía, Colombia | Bishop of Islas Canarias {Canary Islands}, Spain | 
| 61.0 | Confirmed | Carlo Francesco Carnevale † | Bishop of Tortona, Italy | 
| 64.9 | Confirmed | Columbano Giovanni Battista Carlo Gaspare Chiaverotti, O.S.B. † | Archbishop of Torino {Turin}, Italy | 
| 44.8 | Confirmed | Nicola Caputo de’ Marchesi di Cerreto † | Bishop of Lecce, Italy | 
| 74.3 | Appointed | Giulio Maria della Somaglia † | Cardinal-Bishop of Porto e Santa Rufina | Cardinal, Librarian of the Vatican Library | 
| 72.1 | Confirmed | Bernardo Maria della Torre † | Bishop of Castellammare di Stabia, Italy | 
| 59.0 | Confirmed | Francesco Saverio Durini, O.S.B. † | Bishop of Marsi, Italy | Bishop of Aversa, Italy | 
| 71.8 | Appointed | Giovanni Filippo Gallarati Scotti † | Cardinal, Cardinal-Priest of San Lorenzo in Lucina | 
| 60.3 | Confirmed | Bartolomeo Goglia † | Bishop of Sant’Angelo dei Lombardi e Bisaccia, Italy | 
| 50.3 | Appointed | Dámaso Egidio Iglesias y Lago † | Bishop of Orense, Spain | 
| 63.8 | Confirmed | Raffaele Longobardi † | Bishop of Telese o Cerreto Sannita, Italy | 
| 62.8 | Confirmed | Antón Mákay † | Bishop of Banská Bystrica, Slovakia | Bishop of Veszprém, Hungary | 
| 44.4 | Confirmed | Cassiodoro Margarita † | Bishop of Gravina e Irsina (Montepeloso), Italy | 
| 63.1 | Appointed | Rodrigo Antonio de Orellana, O. Praem. † | Bishop of Ávila, Spain | 
| 61.9 | Appointed | Bartolomeo Pacca † | Cardinal-Bishop of Frascati | Cardinal, Secretary of the Congregation for Universal Inquisition | 
| 54.7 | Confirmed | Giuseppe Maria Pellicano † | Bishop of Gerace, Italy | 
| 46.1 | Confirmed | Ján Krstitel Ladislav Pyrker (Pryker), O. Cist. † | Bishop of Spiš, Slovakia | Archbishop of Eger, Hungary | 
| 56.2 | Appointed | Antonio Sánchez Matas, O.F.M. Obs. † | Bishop of La Paz, Bolivia | Bishop Emeritus | 
| 45.5 | Confirmed | Ernst von Schwarzenberg † | Bishop of Győr (Raab), Hungary | 
| 45.7 | Confirmed | Giovanni Battista Tomasuolo † | Bishop of Nicotera e Tropea, Italy | Bishop Emeritus | 
| 51.5 | Confirmed | Gaetano Maria Giuseppe Benedetto Placido Vincenzo Trigona e Parisi † | Bishop of Caltagirone, Italy | Cardinal, Archbishop of Palermo, Italy | 
| 51.1 | Confirmed | Francesco Saverio Triggiani, O.F.M. Conv. † | Bishop of Oria, Italy | Bishop Emeritus | 
| 22 Dec | 66.6 | Died | Johann Aloys (Algis) Schneider † | Vicar Apostolic of Saxonia (Saxony), Germany | 
| 26 Dec |  | Born | Tobia Patroni † |  | Bishop of Valva e Sulmona, Italy | 
| 27 Dec |  | Born | Francesco di Nicola † |  | Bishop of Ischia, Italy | 
| 59.0 | Ordained Bishop | Francesco Saverio Durini, O.S.B. † | Bishop of Marsi, Italy | Bishop of Aversa, Italy | 
| 44.4 | Ordained Bishop | Cassiodoro Margarita † | Bishop of Gravina e Irsina (Montepeloso), Italy | 
| 54.7 | Ordained Bishop | Giuseppe Maria Pellicano † | Bishop of Gerace, Italy | 
| 45.7 | Ordained Bishop | Giovanni Battista Tomasuolo † | Bishop of Nicotera e Tropea, Italy | Bishop Emeritus | 
| 51.1 | Ordained Bishop | Francesco Saverio Triggiani, O.F.M. Conv. † | Bishop of Oria, Italy | Bishop Emeritus | 
| 31 Dec | 55.5 | Selected | Pietro-Paolo Presicce, O.E.S.A. † | Bishop of Tricarico, Italy |