| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 52.0 | Resigned | Giovanni Battista Braschi † | Bishop of Sarsina, Italy | Bishop Emeritus |
| Appointed | João de Brito e Vasconcelos † | Bishop of Angra, Portugal |
| 40.3 | Appointed | Giovanni Carafa † | Bishop of Nicastro, Italy |
| Died | Valeriano Chierichelli † | Bishop of Ferentino, Italy |
| Appointed | Louis-Joseph de Châteauneuf de Rochebonne † | Coadjutor Bishop of Carcassonne, France | Bishop |
| Appointed | Gioachino Maria de' Oldo † | Bishop of Narni, Italy | Bishop Emeritus |
| Appointed | Gabriele de Marchis † | Bishop of Sora, Italy |
| Appointed | Niccolò de Dominicis † | Bishop of Nocera de’ Pagani, Italy |
| Born | François-d'Etienne de Saint-Jean de Prunières † | Gap | Bishop of Grasse, France |
| Born | Jean-Baptiste-Joseph de Fontanges † | Saint-Flour | Bishop of Lavaur, France |
| Appointed | Domenico Galisi † | Bishop of Lettere-Gragnano, Italy |
| Appointed | Francesco Saverio Guicciardi † | Bishop of Cesena, Italy |
| 23.9 | Ordained Priest | Valentín Moran Menéndez, O. de M. † | Priest of Order of Our Lady of Mercy | Bishop Emeritus of Islas Canarias {Canary Islands}, Spain |
| Died | Ludwik Karol Ogiński † | Bishop of Smoleńsk, Poland |
| Died | Carlo Palma † | Bishop of Fossombrone, Italy |
| Appointed | Eustachio Palma † | Bishop of Fossombrone, Italy |
| Died | Orazio Maria Panciatichi † | Bishop of Fiesole, Italy |
| Appointed | Bartolomeo Porzio † | Bishop of Cariati, Italy |
| Appointed | Paolo Stabile † | Bishop of Bova, Italy |
| Died | Niccolò Tolomei † | Bishop of Massa Marittima, Italy |
| Appointed | Giovanni Paolo Torti Rogadei, O.S.B. † | Bishop of Andria, Italy | Bishop of Avellino-Frigento, Italy |
| Appointed | Raffaele Tosti † | Bishop of Minori, Italy |
| 59.0 | Ordained Bishop | Fernando de Valdivia y Mendoza, O.A.R. † | Bishop of Puerto Rico (Porto Rico) |
| 39.8 | Appointed | Dominique-Marie Varlet † | Coadjutor Bishop of Baghdad, Iraq | Bishop Emeritus |
| 39.8 | Appointed | Dominique-Marie Varlet † | Titular Bishop of Ascalon | Bishop Emeritus of Baghdad, Iraq |
| 20.3 | Ordained Priest | Adalbert Walderdorf, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Fulda, Germany |
| Jan | 68.0 | Died | Giovanni Innocenzo Carussio † | Bishop of Muro Lucano, Italy |
| 5 Jan | 68.0 | Appointed | Wilhelm Graf von Leslie † | Bishop of Ljubljana, Slovenia |
| 8 Jan | | Appointed | Alessandro Maria Litta † | Bishop of Cremona, Italy | Bishop Emeritus |
| 9 Jan | | Born | Manoel da Ressurreição, O.F.M. † | | Bishop of São Paulo, Brazil |
| 10 Jan | 30.0 | Appointed | Alejo Fernando de Rojas y Acevedo † | Bishop of Santiago de Chile | Bishop of La Paz, Bolivia |
| Appointed | Giovanni Michele Teroni, B. † | Bishop of Venosa, Italy |
| 59.0 | Appointed | Fernando de Valdivia y Mendoza, O.A.R. † | Bishop of Puerto Rico (Porto Rico) |
| Appointed | Domingo de Valencia † | Bishop of Nueva Caceres, Philippines | Bishop-Elect |
| 23 Jan | 50.2 | Ordained Bishop | Gaetano Stampa † | Titular Archbishop of Chalcedon | Cardinal, Archbishop of Milano {Milan}, Italy |
| 24 Jan | 68.0 | Installed | Francisco del Rincón, O.M. † | Archbishop of Santafé en Nueva Granada, Colombia |
| Appointed | Luca Trapani † | Bishop of Tricarico, Italy |
| 30 Jan | 47.3 | Appointed | Ladislav Szörényi † | Bishop of the Titular See | Bishop of Sirmio, Croatia |
| Feb | | Appointed | Edmund Kelly † | Bishop of Clonfert, Ireland |
| 9 Feb | 60.1 | Died | Pedro Magaña, O.S.B. † | Bishop of Solsona, Spain |
| Appointed | Andrés Quiles Galindo, O.F.M. † | Bishop of León en Nicaragua |
| 11 Feb | 62.0 | Appointed | Marco Antonio Attaffi † | Bishop of Squillace, Italy |
| Appointed | Gianmaria Capecelatro † | Bishop of Ischia, Italy |
| 36.8 | Appointed | Camillo Cibo (Cybo) † | Cardinal, Titular Patriarch of the Titular See |
| 46.6 | Appointed | Gioacchino Maria Oldo † | Bishop of Narni, Italy | Bishop of Terracina, Priverno e Sezze, Italy |
| Appointed | António Paes Godinho, S.J. † | Bishop of Nanking [Nanjing], China | Bishop Emeritus |
| 38.0 | Appointed | Hyacinth Petit, O. Carm. † | Vicar Apostolic of Nordic Missions, Germany |
| 38.0 | Appointed | Hyacinth Petit, O. Carm. † | Auxiliary Bishop of Osnabrück, Germany | Vicar Apostolic of Nordic Missions, Germany |
| 38.0 | Appointed | Hyacinth Petit, O. Carm. † | Titular Bishop of Heliopolis in Augustamnica | Vicar Apostolic of Nordic Missions, Germany |
| 12 Feb | 38.1 | Ordained Bishop | Hyacinth Petit, O. Carm. † | Titular Bishop of Heliopolis in Augustamnica | Vicar Apostolic of Nordic Missions, Germany |
| 13 Feb | 51.9 | Ordained Bishop | Carlos Alamán Ferrer † | Bishop of Barbastro, Spain |
| 46.6 | Ordained Bishop | Gioacchino Maria Oldo † | Bishop of Narni, Italy | Bishop of Terracina, Priverno e Sezze, Italy |
| 61.1 | Ordained Bishop | Salvador Rodríguez Castelblanco, T.O.R. † | Bishop of Orihuela, Spain |
| 14 Feb | 48.9 | Died | Philipp Carl Fürst von Fürstenberg † | Bishop of Lavant, Slovenia |
| 24 Feb | 36.8 | Ordained Bishop | Camillo Cibo (Cybo) † | Cardinal, Titular Patriarch of the Titular See |
| 25 Feb | 72.4 | Died | Diego Montero del Aguila † | Bishop of Trujillo, Peru |
| 27 Feb | 45.9 | Ordained Priest | Andrés de Orbe y Larreátegui † | Priest | Archbishop Emeritus of Valencia, Spain |
| Mar | | Died | Carlo Nicola de Massa † | Bishop of Venafro, Italy |
| 1 Mar | | Born | Clemente Maria Bardini † | Firenze | Bishop of Acquapendente, Italy |
| 2 Mar | | Died | Luc d'Aquin † | Bishop Emeritus of Fréjus, France |
| 3 Mar | | Born | José Maria Sisto e Brito † | Ceglio Feudo di fua Cafa | Bishop of Sora, Italy |
| 6 Mar | 26.6 | Ordained Priest | Bartolomé Rull, O.S. † | Priest of Other | Bishop of Malta |
| 11 Mar | 38.8 | Appointed | Leopold Anton Eleutherius von Firmian † | Bishop of Lavant, Slovenia | Archbishop of Salzburg, Austria |
| 14 Mar | 50.7 | Appointed | Nunzio Baccari † | Bishop of Boiano, Italy |
| Appointed | Tommaso Maria Farina, O.P. † | Bishop of Termoli, Italy |
| Appointed | Pietro Antonio Pietrasanta, B. † | Bishop of Martirano (Martoranum), Italy |
| 19 Mar | | Ordained Bishop | Pietro Antonio Pietrasanta, B. † | Bishop of Martirano (Martoranum), Italy |
| 6 Apr | 62.5 | Appointed | Angelo Acerno † | Bishop of Muro Lucano, Italy |
| Appointed | Nicola Guerriero † | Bishop of Ravello-Scala, Italy |
| 68.3 | Confirmed | Wilhelm Graf von Leslie † | Bishop of Ljubljana, Slovenia |
| 14 Apr | 23.4 | Ordained Priest | Pedro Agustín Morell de Santa Cruz y Lora † | Priest of Santiago de Cuba | Bishop |
| 16 Apr | | Born | Antonio Macarulla Minguilla de Aguilain † | Benabarre, Spain | Bishop of Durango, México |
| 27.3 | Ordained Priest | Francesco Alessandro Odoardi † | Priest | Bishop of Terracina, Priverno e Sezze, Italy |
| 17 Apr | 59.3 | Died | José Ulzurrun de Asanza y Civera † | Bishop of León, Spain |
| 18 Apr | 62.6 | Ordained Bishop | Angelo Acerno † | Bishop of Muro Lucano, Italy |
| Ordained Bishop | Nicola Guerriero † | Bishop of Ravello-Scala, Italy |
| Ordained Bishop | Bartolomeo Porzio † | Bishop of Cariati, Italy |
| 21 Apr | 88.8 | Died | Bandino Panciatici † | Cardinal, Prefect of the Congregation of the Council |
| 28 Apr | | Born | Francesco Mercati † | Zante | Bishop of Zante, Greece |
| 29 Apr | | Born | Raymund Anton Graf von Strasoldo † | Graz | Bishop of Eichstätt, Germany |
| 1 May | 31.3 | Ordained Bishop | Antonio Claudio Alvarez de Quiñones † | Archbishop of Santo Domingo, Dominican Republic | Archbishop of Santafé en Nueva Granada, Colombia |
| 3 May | | Born | Salvatore Pisano † | Salicetto | Bishop of Patti, Italy |
| 7 May | 53.2 | Appointed | François-Armand de Lorraine † | Bishop of Bayeux, France |
| 10 May | | Appointed | Didaco Di Pace † | Bishop of Sarno, Italy |
| 54.9 | Confirmed | Jean-Baptiste Massillon † | Bishop of Clermont, France |
| 11 May | 55.5 | Appointed | Francesco Barberini (Jr.) † | Cardinal-Priest of S. Prassede | Cardinal, Cardinal-Bishop of Ostia (-Velletri) |
| 52.9 | Confirmed | Denis-François Bouthillier de Chavigny † | Archbishop of Sens, France |
| 45.4 | Appointed | Joseph Anton Reichfreiherr von Delmestri von Schönberg † | Titular Bishop of Amyclae | Bishop of Trieste, Italy |
| 45.4 | Confirmed | Joseph Anton Reichfreiherr von Delmestri von Schönberg † | Coadjutor Bishop of Trieste, Italy | Bishop |
| 58.8 | Appointed | Joseph-Emmanuel de la Trémoille † | Cardinal, Archbishop of Cambrai, France |
| Born | Carlo Nicodemi † | Penta | Bishop of Sant’Angelo dei Lombardi-Bisaccia, Italy |
| 14 May | | Ordained Bishop | Edmund Kelly † | Bishop of Clonfert, Ireland |
| Born | Felipe Pérez Santa María † | Avila | Auxiliary Bishop of Toledo, Spain |
| 16 May | 65.4 | Died | Stefan Antonin Mdzewski, O.P. † | Auxiliary Bishop of Gniezno, Poland |
| 18 May | | Appointed | Thomas Flynn † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 22 May | 39.0 | Ordained Bishop | Leopold Anton Eleutherius von Firmian † | Bishop of Lavant, Slovenia | Archbishop of Salzburg, Austria |
| 25 May | | Appointed | Simone Gritti † | Bishop of Ferentino, Italy | Bishop of Acquapendente, Italy |
| 3 Jun | | Born | Francisco Armañá Font, O.S.A. † | Villanueva y Geltrú | Archbishop of Tarragona, Spain |
| 4 Jun | 51.6 | Appointed | Domenico Taglialatela † | Bishop of L’Aquila, Italy |
| 8 Jun | 33.0 | Confirmed | Gabriel-Florent de Choiseul-Beaupré † | Bishop of Saint-Papoul, France | Bishop of Mende, France |
| 48.4 | Confirmed | Louis de La Vergne-Montenard de Tressan † | Bishop of Nantes, France | Archbishop of Rouen, France |
| Appointed | Luigi Maria Macedonio, C.M. † | Bishop of Sessa Aurunca, Italy |
| 12 Jun | 34.5 | Ordained Priest | Lucas Cuartas Oviedo † | Priest | Bishop of Huesca, Spain |
| 23 Jun | | Born | Hyacinthe-Sigismond Gerdil, B. † | Samoëns | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 27 Jun | 35.9 | Appointed | Mihály Frigyes Althan † | Cardinal, Bishop of Vác, Hungary |
| 58.5 | Appointed | Jan Kazimierz de Alten Bokum † | Bishop of Chelmno (Culma), Poland |
| 53.5 | Confirmed | Jacques-Bénigne Bossuet † | Bishop of Troyes, France | Bishop Emeritus |
| 3 Jul | 58.5 | Ordained Bishop | Léon de Beaumont † | Bishop of Saintes, France |
| 10 Jul | 45.5 | Ordained Bishop | Jean-Armand de La Vove de Tourouvre † | Bishop of Rodez, France |
| 48.5 | Ordained Bishop | Louis de La Vergne-Montenard de Tressan † | Bishop of Nantes, France | Archbishop of Rouen, France |
| 13 Jul | 67.5 | Died | Blas Serrate † | Bishop of Tarazona, Spain |
| 15 Jul | | Ordained Bishop | Thomas Flynn † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 16 Jul | 80.9 | Died | Louis de Thomassin † | Bishop of Sisteron, France |
| 17 Jul | 33.1 | Ordained Bishop | Gabriel-Florent de Choiseul-Beaupré † | Bishop of Saint-Papoul, France | Bishop of Mende, France |
| 49.6 | Ordained Bishop | Jean-Paul-François Le Févre de Caumartin † | Bishop of Vannes, France | Bishop of Blois, France |
| 24 Jul | | Ordained Bishop | Louis de Balzac d'Illiers d'Entragues † | Bishop of Lectoure, France |
| 68.6 | Installed | Wilhelm Graf von Leslie † | Bishop of Ljubljana, Slovenia |
| 25 Jul | 26.0 | Ordained Priest | Jakob Johann Joseph Wosky von Bärenstamm † | Priest of Meissen (Meißen) {Lusazia o Lausitz; Sassonia}, Germany | Prefect |
| 31 Jul | 25.5 | Ordained Priest | Adeodato Andrea Aldobrandini (Bivignano) † | Priest | Bishop of Sansepolcro (Borgo San Sepolcro), Italy |
| 53.6 | Ordained Bishop | Jacques-Bénigne Bossuet † | Bishop of Troyes, France | Bishop Emeritus |
| 5 Aug | | Born | Tommaso Maria Ghilini † | Alessandria della Paglia | Cardinal, Cardinal-Priest of S. Maria sopra Minerva |
| 13 Aug | | Died | Alessandro Arrigoni † | Bishop of Mantova, Italy |
| 26 Aug | | Born | Henri-Marie-Bernardin de Rosset de Ceilhes de Fleury † | Fleury | Archbishop of Cambrai, France |
| 28 Aug | 24.2 | Ordained Priest | Antônio de Nossa Senhora do Desterro Malheiro, O.S.B. † | Priest of Order of Saint Benedict | Bishop of São Sebastião do Rio de Janeiro, Brazil |
| 9 Sep | 28.6 | Ordained Priest | Franz Joachim Reichsritter Schmid von Altenstadt † | Priest of Regensburg, Germany | Auxiliary Bishop |
| 21 Sep | | Ordained Bishop | António Paes Godinho, S.J. † | Bishop of Nanking [Nanjing], China | Bishop Emeritus |
| 23 Sep | | Born | Joseph Philipp Franz Reichsgraf von Spaur † | Innsbruck | Bishop of Brixen {Bressanone}, Italy |
| 25 Sep | | Born | Baltasar Yusta Navarro † | Valfermoso de las Monjas | Bishop of Córdoba, Spain |
| 29 Sep | | Born | Daniel Johann Anton Reichsritter von Gebsattel † | Fulda | Auxiliary Bishop of Würzburg, Germany |
| 1 Oct | | Born | José Escalzo Miguel, O.S.B. † | Sesma | Bishop of Cádiz, Spain |
| 3 Oct | 53.3 | Appointed | François-Gabriel Guisain, M.E.P. † | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 53.3 | Appointed | François-Gabriel Guisain, M.E.P. † | Titular Bishop of Laranda | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 4 Oct | | Born | Giovanni Maria Riminaldi † | Ferrara | Cardinal, Cardinal-Priest of S. Silvestro in Capite |
| 12 Oct | 53.7 | Succeeded | James Gordon † | Vicar Apostolic of Scotland, Great Britain | Vicar Apostolic of Lowland District, Scotland, Great Britain |
| 73.8 | Died | Thomas Joseph Nicolson † | Vicar Apostolic of Scotland, Great Britain |
| 15 Oct | | Born | Carlo Zangheri † | Gatteo | Bishop of Assisi, Italy |
| 18 Oct | 54.3 | Died | Franz Anton Graf von Puchheim † | Bishop of Wiener Neustadt, Austria |
| 2 Nov | 58.3 | Appointed | Ignaz von Lovina † | Bishop of Wiener Neustadt, Austria |
| 3 Nov | | Born | Pasquale Acquaviva d’Aragona † | Naples | Cardinal, Cardinal-Deacon of S. Eustachio |
| 7 Nov | 80.5 | Died | Carlo Bichi † | Cardinal, Cardinal-Deacon of S. Agata de’ Goti |
| 14 Nov | 47.4 | Appointed | Lorenzo Altieri † | Cardinal-Deacon of S. Agata de’ Goti | Cardinal, Cardinal-Deacon of S. Maria in Via Lata |
| 29 Nov | | Died | João de Brito e Vasconcelos † | Bishop of Angra, Portugal |
| Dec | | Died | Tommaso Maria Farina, O.P. † | Bishop of Termoli, Italy |
| 3 Dec | 74.1 | Appointed | Philibert LeBlanc, M.E.P. † | Titular Bishop of Troas | Vicar Apostolic of Yunnan, China |
| 71.7 | Appointed | Magino Ventallol, O.P. † | Vicar Apostolic of Fo-Kien, China |
| 71.7 | Appointed | Magino Ventallol, O.P. † | Titular Bishop of Carystus | Vicar Apostolic of Fo-Kien, China |
| 5 Dec | 51.1 | Appointed | Johann Joachim Hahn † | Auxiliary Bishop of Mainz, Germany |
| 51.1 | Appointed | Johann Joachim Hahn † | Titular Bishop of Metellopolis | Auxiliary Bishop of Mainz, Germany |
| 41.0 | Appointed | Johann Jakob von Mayr † | Auxiliary Bishop of Augsburg, Germany |
| 41.0 | Appointed | Johann Jakob von Mayr † | Titular Bishop of Pergamum | Auxiliary Bishop of Augsburg, Germany |
| 17 Dec | 22.9 | Ordained Priest | Lodovico Calini † | Priest of Brescia, Italy | Cardinal, Bishop of Crema, Italy |
| 21 Dec | 55.5 | Ordained Bishop | Jean-Baptiste Massillon † | Bishop of Clermont, France |
| 25 Dec | | Died | Francesco Berardino Corradini † | Bishop of Marsi, Italy |
| 60.6 | Died | Franz Arnold Reichsfreiherr von Wolf-Metternich zur Gracht † | Bishop of Paderborn, Germany |
| 27 Dec | | Born | Giovanni Coccoli † | Arpino | Bishop of Vulturara e Montecorvino, Italy |
| 25.8 | Ordained Priest | Hilário de Santa Rosa, O.F.M. † | Priest of Order of Friars Minor | Bishop Emeritus of Macau, China |