| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Manuel Abad y Queipo † | Asturias, Spain | Former Bishop-Elect of Michoacán, Michoacán, México |
| 38.9 | Appointed | François Bareau de Girac † | Bishop of Rennes, France | Bishop Emeritus |
| 38.0 | Appointed | Louis-Henri de Bruyère de Chalabre † | Bishop of Saint-Pons-de-Thomières, France |
| Died | Domenico Andrea Calvaccante (Cavalcante) † | Archbishop of Trani, Italy |
| 46.0 | Appointed | Giovanni Benedetto M. Civran † | Bishop of Concordia, Italy | Bishop of Chioggia, Italy |
| Born | Bartholomew Crotty † | Clonakilty | Bishop of Ross, Ireland |
| Died | Matteu D'Angelis † | Bishop of Aleria, France |
| 57.0 | Appointed | Jean de Cairol de Madaillan † | Bishop of Vence, France | Bishop Emeritus of Grenoble, France |
| Died | José Luis de Lila y Moreno † | Bishop of Ayacucho o Huamanga, Peru |
| 34.0 | Appointed | Jules-Basile Ferron de La Ferronnays † | Bishop of Saint-Brieuc, France | Bishop of Lisieux, France |
| 55.6 | Died | Tommaso Giannelli † | Bishop of Termoli, Italy |
| Died | Giacomo Leto † | Archbishop of Lanciano, Italy |
| Born | Mateusz Lipski † | Mohilow | Bishop of Minsk, Belarus |
| 22.5 | Ordained Priest | Jean-Siffrein Maury † | Priest | Cardinal, Bishop Emeritus of Montefiascone, Italy |
| 63.0 | Appointed | Mathew McKenna † | Bishop of Ross, Ireland |
| 63.0 | Appointed | Mathew McKenna † | Bishop of Cloyne, Ireland | Bishop of Ross, Ireland |
| Born | Ioannes Baptistus Russin † | Tinos | Bishop Emeritus of Syros e Milos, Greece |
| Born | Kyrylo Syrotynskyj † | | Bishop of Foreign Diocese |
| 18 Jan | 57.2 | Appointed | Anton Ignaz Reichsgraf von Fugger-Glött † | Bishop of Regensburg, Germany |
| 23 Jan | 41.7 | Appointed | Ludwig Joseph Freiherr von Welden auf Laubheim und Hohenaltingen † | Bishop of Freising, Germany |
| 26 Jan | | Born | Niccola Kovats de Csil-Tusnad † | | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 29 Jan | | Born | Joachin (Gioacchino Domenico) Salvetti, O.F.M. † | Bagno di Casciano, Italy | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| Feb | 55.9 | Died | Sebastiano Canepa † | Bishop of Nicopoli, Bulgaria |
| 2 Feb | 33.6 | Ordained Priest | Andrea Corsini † | Priest | Cardinal, Cardinal-Bishop of Sabina |
| 75.9 | Died | Carlo della Torre Rezzonico † | Pope (Roma {Rome}, Italy) |
| 3 Feb | 54.8 | Died | Diego Antonio Díez Madroñero † | Bishop of Caracas, Santiago de Venezuela |
| 18 Feb | 23.9 | Ordained Priest | Joseph Anton Blatter † | Priest of Sion {Sitten}, Switzerland | Bishop |
| 56.3 | Died | Pierre de La Romagère de Ronssecy † | Bishop of Tarbes, France |
| 19 Feb | 77.6 | Died | Bartolomé Rull, O.S. † | Bishop of Malta |
| 23 Feb | 67.3 | Died | Francisco Galindo Sanz, O.M. † | Bishop of Orense, Spain |
| 28 Feb | 63.2 | Died | Jean de Bonneguise † | Bishop of Arras, France |
| 8 Mar | | Born | Francisco Pablo Vásquez Bizcaíno (y Sánchez) † | Atlixco | Bishop of Tlaxcala, Tlaxcala, México |
| 10 Mar | | Born | Salvatore de Luca † | Napoli | Archbishop of Rossano, Italy |
| 13 Mar | 68.2 | Died | John O’Brien † | Bishop of Ross, Ireland |
| 24 Mar | | Born | José Maria de Araújo, O.S.H. † | Porto | Bishop of Olinda, Brazil |
| 2 Apr | | Born | Giacinto Placido Zurla, O.S.B. † | Legnano | Cardinal, Prefect of the Congregation for Studies |
| 5 Apr | | Born | Claude-Hippolyte Clausel de Montals † | Coussergues | Bishop Emeritus of Chartres, France |
| 8 Apr | | Born | Dionisio Castaño Bermúdez † | Noves | Bishop of Gerona, Spain |
| 14 Apr | 61.3 | Died | Johann Friedrich von Lasser † | Auxiliary Bishop of Mainz, Germany |
| 15 Apr | | Born | Carlo Oppizoni (Opizzoni) † | Milano | Cardinal, Archbishop Emeritus of Bologna, Italy |
| 18 Apr | | Born | Manuel Santo Galdino, O.F.M. † | Lisboa, Portugal | Archbishop of Goa, India |
| 19 Apr | | Born | Anselmo Basilici † | Canemorto | Bishop of Nepi e Sutri, Italy |
| 9 May | | Born | Gregorio Rodríguez Carrillo, O.S.Bas. † | Villanueva del Ariscal, Spain | Bishop of Cartagena, Colombia |
| 14 May | 30.1 | Ordained Priest | Wojciech Gorski † | Priest | Bishop of Kielce, Poland |
| 19 May | 63.6 | Elected | Lorenzo (Giovanni Vincenzo Antonio) Ganganelli, O.F.M. Conv. † | Pope (Roma {Rome}, Italy) |
| 49.6 | Appointed | Lazzaro Opiziio Pallavicino † | Cardinal, Secretary of the Secretariat of State |
| 20 May | 24.1 | Ordained Priest | Sylvestre a Maria Santissima (Santa Maria), O.F.M. † | Priest of Order of Friars Minor | Bishop of Santiago de Cabo Verde |
| 21 May | 39.7 | Ordained Bishop | George Hay † | Titular Bishop of Daulia | Vicar Apostolic Emeritus of Lowland District, Scotland, Great Britain |
| 23 May | 79.1 | Died | Christoph Nebel † | Auxiliary Bishop of Mainz, Germany |
| 28 May | 46.5 | Ordained Bishop | Benoit-Antoine Doria † | Bishop of Ajaccio, France |
| 63.6 | Ordained Bishop | Lorenzo (Giovanni Vincenzo Antonio) Ganganelli, O.F.M. Conv. † | Pope (Roma {Rome}, Italy) |
| Jun | | Born | Domenico Armellini † | Rome | Bishop of Terni, Italy |
| 53.7 | Died | Erasmo Mastrilli † | Bishop of Isernia, Italy |
| 6 Jun | 23.5 | Ordained Priest | Matthäus Georg von Chandelle † | Priest of Mainz, Germany | Bishop of Speyer, Germany |
| 7 Jun | 31.3 | Ordained Priest | Teodozy Wislocki, O.S.Bas. † | Priest of Other | Bishop of Foreign Diocese |
| 9 Jun | 63.6 | Installed | Lorenzo (Giovanni Vincenzo Antonio) Ganganelli, O.F.M. Conv. † | Pope (Roma {Rome}, Italy) |
| 10 Jun | | Born | László Esterházy † | Sopron, Hungary | Bishop of Foreign Diocese |
| 12 Jun | 63.7 | Appointed | Giuseppe Boccarelli † | Bishop of Termoli, Italy |
| 61.9 | Appointed | Juan Bautista Cervera, O.F.M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop of Cádiz, Spain |
| 57.6 | Confirmed | Anton Ignaz Reichsgraf von Fugger-Glött † | Bishop of Regensburg, Germany |
| 47.6 | Appointed | Marcantonio Marcolini † | Cardinal, Titular Archbishop of Thessalonica |
| 42.1 | Confirmed | Ludwig Joseph Freiherr von Welden auf Laubheim und Hohenaltingen † | Bishop of Freising, Germany |
| 16 Jun | | Born | Antonio Savorin † | Torreglia | Bishop of Chioggia, Italy |
| 18 Jun | 42.4 | Appointed | Michel-François de Couët du Vivier de Lorry † | Bishop of Tarbes, France | Bishop Emeritus of La Rochelle, France |
| 31.2 | Appointed | Joachim-François-Mamert de Conzié † | Bishop of Saint-Omer, France | Archbishop of Tours, France |
| 22 Jun | | Born | Pablo Hernandez, O.SS.T. † | Madrid | Bishop of Ceuta, Spain |
| 25 Jun | 76.4 | Died | Carlo Francesco Durini † | Cardinal, Bishop of Pavia, Italy |
| 26 Jun | 45.3 | Installed | Buenaventura Córdoba Espinosa de la Cerda † | Cardinal-Priest of S. Lorenzo in Panisperna | Cardinal, Patriarch of West Indies, Antilles |
| 64.2 | Installed | Giovanni Molino † | Cardinal-Priest of S. Sisto | Cardinal, Bishop of Brescia, Italy |
| 54.1 | Appointed | François-Joachim de Pierres de Bernis † | Cardinal-Priest of S. Silvestro in Capite | Cardinal, Archbishop of Albi, France |
| 56.4 | Installed | Francisco de Solís Folch de Cardona † | Cardinal-Priest of Ss. XII Apostoli | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| 29 Jun | 47.6 | Ordained Bishop | Marcantonio Marcolini † | Cardinal, Titular Archbishop of Thessalonica |
| 7 Jul | | Born | Francesco Saverio Caruana † | Malta | Bishop of Malta |
| 12 Jul | 74.1 | Died | Juan Manuel Rodríguez Castañón † | Bishop of Tui, Spain |
| 16 Jul | 62.0 | Ordained Bishop | Juan Bautista Cervera, O.F.M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop of Cádiz, Spain |
| 17 Jul | 44.2 | Appointed | Johann Heinrich von Kerens, S.J. † | Bishop of Roermond, Netherlands | Bishop of Sankt Pölten, Austria |
| 20 Jul | | Born | Giuseppe de Belansky † | Castello di Kunyza | Bishop of Banská Bystrica, Slovakia |
| 21 Jul | 74.2 | Died | Krzysztof Michal Dobinski † | Auxiliary Bishop of Gniezno, Poland |
| 25 Jul | 65.5 | Died | William Maire † | Coadjutor Vicar Apostolic of Northern District, England, Great Britain |
| 6 Aug | | Born | Johann Theodor van der Noot † | Luxembourg | Vicar Apostolic Emeritus of Luxembourg |
| 7 Aug | | Born | Karl Kajetan Graf von Gaisruck (Gaysruck) † | Klagenfurt, Austria | Cardinal, Archbishop of Milano {Milan}, Italy |
| 8 Aug | | Born | Antonio Larrazábal † | Santiago de Guatemala | Titular Bishop of Comana Armeniae |
| 10 Aug | 70.6 | Died | Benito Marín, O.S.B. † | Bishop of Jaén, Spain |
| 18 Aug | | Born | Cajetan Pires Pireira, C.M. † | Cerdeira, Portugal | Bishop of Nanking [Nanjing], China |
| 21 Aug | 37.6 | Appointed | Louis-François-Marc Hilaire de Conzié † | Bishop of Arras, France |
| 31.4 | Confirmed | Joachim-François-Mamert de Conzié † | Bishop of Saint-Omer, France | Archbishop of Tours, France |
| 35.8 | Appointed | Michelangelo Parata † | Bishop of Isernia, Italy |
| 53.8 | Appointed | Lucas Ramírez Galán, O.F.M. † | Archbishop of Santafé en Nueva Granada, Colombia | Bishop of Tui, Spain |
| 23 Aug | | Born | Joaquim José Pacheco Sousa † | Alenquer | Bishop of Guarda, Portugal |
| 26 Aug | 81.7 | Died | Paul-Alexandre de Guénet † | Bishop of Saint-Pons-de-Thomières, France |
| 44.3 | Confirmed | Johann Heinrich von Kerens, S.J. † | Bishop of Roermond, Netherlands | Bishop of Sankt Pölten, Austria |
| 6 Sep | 57.9 | Died | Ignazio Savastano † | Bishop of Gallipoli, Italy |
| 10 Sep | 43.5 | Ordained Bishop | François Pottier, M.E.P. † | Titular Bishop of Agathopolis | Vicar Apostolic of Se-Ciuen (Setchoan), China |
| 42.3 | Ordained Bishop | Ludwig Joseph Freiherr von Welden auf Laubheim und Hohenaltingen † | Bishop of Freising, Germany |
| 11 Sep | 66.9 | Appointed | Alsonso Francisco Arango † | Bishop of Orense, Spain |
| 55.4 | Appointed | Ludwig Philipp Behelm † | Auxiliary Bishop of Mainz, Germany |
| 55.4 | Appointed | Ludwig Philipp Behelm † | Titular Bishop of Domitiopolis | Auxiliary Bishop of Mainz, Germany |
| 48.9 | Appointed | Matthias Franz Reichsgraf von Chorinsky † | Auxiliary Bishop of Olomouc, Czech Republic | Bishop of Brno, Czech Republic |
| 48.9 | Appointed | Matthias Franz Reichsgraf von Chorinsky † | Titular Bishop of Sebaste in Palaestina | Bishop of Brno, Czech Republic |
| 34.3 | Appointed | Andrea Corsini † | Cardinal-Priest of S. Matteo in Merulana | Cardinal, Cardinal-Bishop of Sabina |
| 32.5 | Appointed | Vittorio Maria Baldassare Gaetano Costa d'Arignano † | Bishop of Vercelli, Italy | Cardinal, Archbishop of Torino {Turin}, Italy |
| 42.7 | Confirmed | Michel-François de Couët du Vivier de Lorry † | Bishop of Tarbes, France | Bishop Emeritus of La Rochelle, France |
| 46.5 | Appointed | Johann Georg Joseph von Eckart † | Auxiliary Bishop of Mainz, Germany |
| 46.5 | Appointed | Johann Georg Joseph von Eckart † | Titular Bishop of Ioppe | Auxiliary Bishop of Mainz, Germany |
| Appointed | Bartolomeo Olivazzi † | Bishop of Pavia, Italy |
| 17 Sep | 57.9 | Ordained Bishop | Anton Ignaz Reichsgraf von Fugger-Glött † | Bishop of Regensburg, Germany |
| 31.5 | Ordained Bishop | Joachim-François-Mamert de Conzié † | Bishop of Saint-Omer, France | Archbishop of Tours, France |
| 18 Sep | 46.5 | Ordained Bishop | Johann Georg Joseph von Eckart † | Titular Bishop of Ioppe | Auxiliary Bishop of Mainz, Germany |
| 21 Sep | 32.5 | Ordained Bishop | Vittorio Maria Baldassare Gaetano Costa d'Arignano † | Bishop of Vercelli, Italy | Cardinal, Archbishop of Torino {Turin}, Italy |
| 34.4 | Appointed | Giuseppe Ottavio Pochettini † | Bishop of Ivrea, Italy |
| 23 Sep | 23.5 | Ordained Priest | Mauro Paolo Giuseppe Antonino Michele Maria Mari, O.S.B. † | Priest of Order of Saint Benedict | Bishop Emeritus of Dora |
| 23.6 | Ordained Priest | John Young † | Priest of Limerick, Ireland | Bishop |
| 27 Sep | | Died | Giovan Domenico Mansi, O.M.D. † | Archbishop of Lucca, Italy |
| 6 Oct | 83.8 | Died | Andrés Mayoral Alonso de Mella † | Archbishop of Valencia, Spain |
| 10 Oct | 61.2 | Died | Franz Karl Joseph Reichsgraf von Fugger-Glött † | Auxiliary Bishop Emeritus of Konstanz {Constance}, Germany |
| 15 Oct | 46.8 | Appointed | Juan Manuel Moscoso y Peralta † | Auxiliary Bishop of Arequipa, Peru | Archbishop of Granada, Spain |
| 16 Oct | 49.0 | Ordained Bishop | Matthias Franz Reichsgraf von Chorinsky † | Titular Bishop of Sebaste in Palaestina | Bishop of Brno, Czech Republic |
| 17 Oct | 15.3 | Professed | Peter Klobusiczky † | Member of Society of Jesus | Archbishop of Kalocsa, Hungary |
| 58.7 | Died | José Cayetano Loazes Somoza † | Bishop of Palencia, Spain |
| 20 Oct | | Born | Stanisław Kostka Choromański † | | Archbishop of Warszawa {Warsaw}, Poland |
| 28 Oct | 28.9 | Ordained Priest | Andrzej Antoni Ignacy Gawronski † | Priest of Society of Jesus | Bishop of Kraków, Poland |
| 2 Nov | | Born | Carlo Maria Pedicini † | Benevento | Cardinal, Bishop of Porto e Santa Rufina, Italy |
| 4 Nov | | Born | Giovanni Horváth † | Csicso | Bishop of Székesfehérvár (Albareale), Hungary |
| 9 Nov | 73.4 | Died | Ferdinando Mandarani † | Bishop of Oppido Mamertina, Italy |
| 15 Nov | 66.9 | Died | Louis-Jacques d'Audibert de Lussan † | Archbishop of Bordeaux, France |
| 20 Nov | 46.6 | Appointed | Nicola Bizzarri † | Bishop of Forli, Italy |
| 61.6 | Appointed | José Vicente Díaz Bravo, O. Carm. † | Bishop of Durango, México |
| Appointed | Juan Manuel Garcia de Vargas y Ribera, O. de M. † | Bishop of Chiapas (Ciudad Real de Chiapas), Chiapas, México |
| 50.4 | Appointed | Karl Johann Reichsgraf von Herberstein † | Coadjutor Bishop of Ljubljana, Slovenia | Bishop |
| 50.4 | Appointed | Karl Johann Reichsgraf von Herberstein † | Titular Bishop of Myndus | Bishop of Ljubljana, Slovenia |
| 41.2 | Appointed | Antonio Lanza, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 42.6 | Appointed | Juan Llano Ponte † | Auxiliary Bishop of Oviedo, Spain | Bishop |
| 42.6 | Appointed | Juan Llano Ponte † | Titular Bishop of Lares | Bishop of Oviedo, Spain |
| 48.0 | Appointed | Juan Varela Fondevilla y Verea † | Auxiliary Bishop of Santiago de Compostela, Spain |
| 48.0 | Appointed | Juan Varela Fondevilla y Verea † | Titular Bishop of Tanis | Auxiliary Bishop of Santiago de Compostela, Spain |
| 24 Nov | | Died | Patrick Fitzsimon † | Archbishop of Dublin, Ireland |
| 26 Nov | 42.4 | Ordained Bishop | Miguel García San Esteban, O.P. † | Bishop of Nueva Segovia, Philippines |
| 30 Nov | 53.3 | Appointed | Domenico Gervasoni † | Archbishop of Lanciano, Italy |
| 2 Dec | 59.9 | Died | Diego Salguero de Cabrera † | Bishop of Arequipa, Peru |
| 9 Dec | 48.5 | Died | Aymard-Chrétien-François-Michel de Nicolay † | Bishop of Verdun, France |
| 13 Dec | | Born | Luis Antonio Folgueras Sión † | Villavaler | Archbishop of Granada, Spain |
| 14 Dec | | Born | Henricus den Dubbelden † | Asten | Vicar Apostolic of ’s Hertogenbosch (Bois-le-Duc), Netherlands |
| 16 Dec | | Born | Kajetan von Kowalski † | Popówko | Auxiliary Bishop of Gniezno-Poznań, Poland |
| 17 Dec | 55.6 | Ordained Bishop | Ludwig Philipp Behelm † | Titular Bishop of Domitiopolis | Auxiliary Bishop of Mainz, Germany |
| 18 Dec | 49.9 | Appointed | Gaetano Maria Capece, C.R. † | Archbishop of Trani, Italy | Bishop of Pozzuoli, Italy |
| 68.0 | Elevated to Cardinal | Paulo de Carvalho de Mendoça † | In Pectore | Cardinal, |
| 38.9 | Appointed | Innocenzo Conti † | Cardinal, Titular Archbishop of Tyrus |
| 62.4 | Appointed | Joaquín de Eleta, O.F.M. † | Titular Archbishop of Thebae Phthiotides | Bishop of Osma, Spain |
| 20 Dec | | Born | Giacomo Giustiniani † | Rome | Cardinal, Prefect of the Roman Curia - Other |
| 21 Dec | | Born | Maximilian Joseph Gottfried Sommerau Beeckh † | Vienna | Cardinal, Archbishop of Olomouc, Czech Republic |
| 25 Dec | | Born | Salvador de Apodaca y Loreto † | Guadalajara | Bishop of Linares o Nueva León, Nuevo León, México |
| 53.0 | Appointed | Henri-Louis-René Des Nos † | Bishop of Verdun, France |
| 26 Dec | 38.9 | Ordained Bishop | Innocenzo Conti † | Cardinal, Titular Archbishop of Tyrus |
| 31.1 | Appointed | Ferdinand-Maximilien-Mériadec de Rohan-Guémené † | Archbishop of Bordeaux, France | Archbishop Emeritus of Cambrai, France |