| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 85.0 | Died | Ubaldo Baldassini, B. † | Bishop of Jesi, Italy |
| 23.2 | Ordained Priest | Etienne-Alexandre-Jean-Baptiste-Marie Bernier † | Priest | Bishop of Orléans, France |
| Appointed | João António Binet Pincio † | Bishop of Lamego, Portugal |
| 22.8 | Ordained Priest | Jean-Baptiste-Marie Caffarelli † | Priest | Bishop of Saint-Brieuc, France |
| 20.3 | Professed | Bartolomeo Alberto (Mauro) Cappellari, O.S.B. † | Member of Order of Saint Benedict | Pope (Roma {Rome}, Italy) |
| 68.6 | Died | Giuseppe Maria Carafa † | Bishop of Mileto, Italy |
| 39.6 | Appointed | Elléon de Castellane-Mazangues † | Bishop of Toulon, France |
| 73.6 | Retired | Pedro Cortez y Larraz † | Bishop of Tortosa, Spain | Bishop Emeritus |
| 28.8 | Incardinated | Godfried Joseph Crüts van Creits † | Priest of Sankt Pölten, Austria | Bishop |
| Died | Francesco D'Afflitto † | Bishop of Lettere-Gragnano, Italy |
| 37.0 | Appointed | Charles-César-Louis d'Agoult de Bonneval † | Bishop of Pamiers, France | Bishop Emeritus |
| Born | James Doyle, O.S.A. † | | Bishop of Kildare and Leighlin, Ireland |
| 35.8 | Succeeded | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Bishop of Vaison, France | Bishop Emeritus |
| 23.6 | Ordained Priest | Esprit-Marie-Joseph Florens, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Siam, Thailand |
| 82.1 | Died | Giovanni Battista Giacobini (Jacobini) † | Bishop of Veroli, Italy |
| 77.9 | Died | Giovanni Hieronymo Gradenigo, C.R. † | Archbishop of Udine, Italy |
| Born | Stefano Holas † | Ancira | Bishop of Adana (Armenian), Turkey |
| 24.7 | Ordained Priest | Jean Jacoupy † | Priest | Bishop Emeritus of Agen, France |
| 73.0 | Died | Henri-Gaston de Lévis-Leran † | Bishop of Pamiers, France |
| 50.3 | Appointed | Francis Moylan † | Bishop of Cork, Ireland |
| 77.0 | Resigned | Charles-François de Pélissier de Saint-Ferréol † | Bishop of Vaison, France | Bishop Emeritus |
| 23.6 | Ordained Priest | William Poynter † | Priest | Vicar Apostolic of London District, England, Great Britain |
| 77.6 | Died | Giuseppe Tomaso de Rossi † | Bishop of Alessandria (della Paglia), Italy |
| Appointed | Niccolò Sagredo † | Archbishop of Udine, Italy |
| 27.6 | Ordained Priest | Pedro Valero † | Priest | Bishop of Gerona, Spain |
| 54.8 | Died | Manuel de Vasconcellos Pereira † | Bishop of Lamego, Portugal |
| Born | Cornelius Ludovicus van Wijkerslooth (Wykerslooth) † | | Vicar Apostolic of Curium |
| 3 Jan | 46.0 | Appointed | Antonio Felice Zondadari † | Apostolic Nuncio to Belgium | Cardinal, Archbishop of Siena, Italy |
| 12 Jan | | Born | Benedetto Terenzio † | Fondi nel Lazio | Bishop of Trivento, Italy |
| 15 Jan | 40.1 | Ordained Bishop | Gabriel Cortois de Pressigny † | Bishop of Saint-Malo, France | Archbishop of Besançon, France |
| 2 Feb | | Born | Ignaz Bernhard Mauermann † | Neuzelle | Vicar Apostolic of Foreign Vicariate |
| 5 Feb | 56.6 | Ordained Bishop | José López Gil, O. Carm. † | Bishop of Jaca, Spain |
| 8 Feb | | Died | Gian Antioco Sisra † | Bishop of Galtelli-Nuoro, Italy |
| 13 Feb | 40.2 | Installed | Gabriel Cortois de Pressigny † | Bishop of Saint-Malo, France | Archbishop of Besançon, France |
| 19 Feb | 29.6 | Ordained Bishop | François Antoine Marie Constantin de Méan et de Beaurieux † | Titular Bishop of Hippos | Archbishop of Mechelen, Belgium |
| 21 Feb | | Born | Matthias Pollitzer † | Oblaß | Auxiliary Bishop of Wien {Vienna}, Austria |
| 25 Feb | 25.1 | Ordained Priest | Jean-Jacques Guérard, M.E.P. † | Priest of Rouen, France | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 26 Feb | 65.0 | Ordained Bishop | Angel Molinos, O.P. † | Bishop of Zamora, Spain |
| 56.0 | Ordained Bishop | Benito Uría Valdés, O.S.B. † | Bishop of Ciudad Rodrigo, Spain |
| 7 Mar | 48.8 | Appointed | Franz Egon Freiherr von Fürstenberg † | Coadjutor Bishop of Hildesheim, Germany | Bishop |
| 8 Mar | 54.5 | Died | Antonio Paramo Somoza † | Bishop-Elect of Lugo, Spain |
| 10 Mar | 41.2 | Appointed | Arnaud-Antoine Garnault, M.E.P. † | Vicar Apostolic of Siam, Thailand |
| 41.2 | Appointed | Arnaud-Antoine Garnault, M.E.P. † | Titular Bishop of Metellopolis | Vicar Apostolic of Siam, Thailand |
| 11 Mar | 23.0 | Ordained Priest | Joseph-Octave Plessis † | Priest | Archbishop of Québec, Québec, Canada |
| 12 Mar | 65.8 | Ordained Bishop | Juan García Ruiz, O.S.A. † | Bishop of Nueva Caceres, Philippines |
| 14 Mar | | Born | Domenico-Maria-Giuseppe Lo Jacono, C.R. † | Siculiana | Bishop of Agrigento (Girgenti), Italy |
| 18 Mar | 77.5 | Died | Fabio Palumbo, C.R. † | Bishop of Conversano, Italy |
| 19 Mar | 52.6 | Ordained Bishop | Bartolomé Antonio Fernández Sobrado, O.F.M. Cap. † | Bishop of Ceuta, Spain |
| 25 Mar | | Born | William Hogarth † | Dodding Green | Bishop of Hexham and Newcastle, England, Great Britain |
| 29 Mar | | Died | Andrea Benedetto Ganassoni † | Bishop of Feltre, Italy |
| 1 Apr | 22.6 | Ordained Priest | Andreas Stanislaus von Hattynski (Hatten) † | Priest of Warmia, Poland | Bishop |
| 3 Apr | 48.2 | Appointed | Tiberio Cortese † | Bishop of Modena, Italy |
| 60.4 | Installed | Giuseppe Garampi † | Cardinal-Priest of Ss. Giovanni e Paolo | Cardinal, Bishop of Montefiascone, Italy |
| 66.3 | Appointed | Jean Jacques (Johann Jakob) Lantz † | Auxiliary Bishop of Strasbourg, France |
| 66.3 | Appointed | Jean Jacques (Johann Jakob) Lantz † | Titular Bishop of Dora | Auxiliary Bishop of Strasbourg, France |
| 42.1 | Appointed | Alessandro Mattei † | Cardinal-Priest of S. Maria in Ara Coeli | Cardinal, Bishop of Ostia (-Velletri), Italy |
| 40.4 | Appointed | Pietro Antonio Zorzi, C.R.S. † | Bishop of Ceneda, Italy | Cardinal, Archbishop of Udine, Italy |
| 5 Apr | 48.9 | Installed | Juan Félix de Villegas † | Bishop of León en Nicaragua | Archbishop of Guatemala |
| 6 Apr | | Born | Francesco di Paolo Pischtek † | Potozich | Archbishop of Lviv, Ukraine |
| Born | Jean-François-Marcellin Turinaz † | Le Châtelard | Bishop Emeritus of Tarentaise, France |
| 7 Apr | 69.5 | Died | Benedetto Pucilli † | Bishop of Terracina, Priverno e Sezze, Italy |
| 9 Apr | 51.6 | Installed | Charles Alexandre d'Arberg et de Valengin † | Bishop of Ypres (Ieper), Belgium | Bishop Emeritus |
| 67.2 | Died | Ferdinand Christoph Graf von Waldburg-Zeil † | Bishop of Chiemsee, Germany |
| 11 Apr | 73.3 | Died | Fernando de Sousa e Silva † | Cardinal, Patriarch of Lisboa, Portugal |
| 17 Apr | 48.2 | Ordained Bishop | Tiberio Cortese † | Bishop of Modena, Italy |
| 29.3 | Ordained Bishop | Bartolomeo Pacca † | Titular Archbishop of Tamiathis | Cardinal, Secretary of the Roman Curia - Other |
| 40.4 | Ordained Bishop | Pietro Antonio Zorzi, C.R.S. † | Bishop of Ceneda, Italy | Cardinal, Archbishop of Udine, Italy |
| 24 Apr | 29.3 | Appointed | Bartolomeo Pacca † | Apostolic Nuncio to Germany | Cardinal, Secretary of the Roman Curia - Other |
| 29 Apr | 64.2 | Confirmed | Alexander Franz Joseph Graf Engl von und zu Wagrain † | Bishop of Leoben, Austria |
| 30 Apr | 64.2 | Ordained Bishop | Alexander Franz Joseph Graf Engl von und zu Wagrain † | Bishop of Leoben, Austria |
| 15 May | 66.4 | Ordained Bishop | Jean Jacques (Johann Jakob) Lantz † | Titular Bishop of Dora | Auxiliary Bishop of Strasbourg, France |
| 2 Jun | 38.4 | Appointed | Charles Berington † | Coadjutor Vicar Apostolic of Midland District, England, Great Britain | Vicar Apostolic |
| 38.4 | Appointed | Charles Berington † | Titular Bishop of Hierocaesarea | Vicar Apostolic of Midland District, England, Great Britain |
| 5 Jun | | Born | Felice Regano (Regnano) † | Andria | Bishop of Catania, Italy |
| 11 Jun | | Born | Gianfrancesco Guglielmo Tippmann † | Praha | Auxiliary Bishop of Praha {Prague}, Czech Republic |
| 25.4 | Ordained Priest | Gioacchino Tosi † | Priest | Bishop Emeritus of Anagni, Italy |
| 12 Jun | 49.1 | Appointed | Franz Egon Freiherr von Fürstenberg † | Coadjutor Bishop of Paderborn, Germany | Bishop of Hildesheim, Germany |
| 15 Jun | 63.1 | Appointed | Franz de Paula Xaver Ludwig Jakob Fürst von Breuner † | Bishop of Chiemsee, Germany |
| 24 Jun | 29.9 | Ordained Priest | Lorenz Barlomiej Ignacy Antoni Raczynski, O. Cist. † | Priest of Order of Cistercians | Auxiliary Bishop of Gniezno, Poland |
| 25 Jun | | Born | Peter Augustine Baines, O.S.B. † | Peartree Farm, Kirkby | Vicar Apostolic of Western District, England, Great Britain |
| Born | Giovanni Battista Naselli, C.O. † | Napoli | Archbishop of Palermo, Italy |
| 26 Jun | 43.8 | Ordained Priest | José Joaquim da Cunha Azeredo Coutinho † | Priest | Bishop of Elvas, Portugal |
| 30 Jun | | Appointed | Thomas Costello † | Coadjutor Bishop of Clonfert, Ireland | Bishop |
| 6 Jul | | Succeeded | Thomas Costello † | Bishop of Clonfert, Ireland |
| Died | Andrew Donnellan † | Bishop of Clonfert, Ireland |
| 19 Jul | | Born | Vincenzo Pieùkowski † | Wolka | Bishop of Lublin, Poland |
| 22 Jul | | Born | Sebastião da Anunciação Gomes de Lemos, O.C.D. † | Eixo, Portugal | Bishop Emeritus of Angola e Congo, Angola |
| 24 Jul | 38.4 | Appointed | Bernardo Maria Carenzoni, O.S.B. † | Bishop of Feltre, Italy |
| 56.0 | Installed | Nicola Colonna di Stigliano † | Cardinal, Cardinal-Priest of S. Stefano al Monte Celio |
| 49.2 | Appointed | Franz Egon Freiherr von Fürstenberg † | Titular Bishop of Derbe | Bishop of Hildesheim, Germany |
| 49.2 | Confirmed | Franz Egon Freiherr von Fürstenberg † | Coadjutor Bishop of Hildesheim, Germany | Bishop |
| 49.2 | Confirmed | Franz Egon Freiherr von Fürstenberg † | Coadjutor Bishop of Paderborn, Germany | Bishop of Hildesheim, Germany |
| 51.3 | Appointed | Victoriano López Gonzalo † | Bishop of Tortosa, Spain | Bishop of Cartagena (en España) |
| 27 Jul | 24.3 | Ordained Priest | Richard Kornelius Dammers † | Priest of Paderborn, Germany | Bishop |
| 31 Jul | 75.5 | Died | Antonio Branciforte Colonna † | Cardinal, Bishop of Agrigento (Girgenti), Italy |
| 1 Aug | 38.6 | Ordained Bishop | Charles Berington † | Titular Bishop of Hierocaesarea | Vicar Apostolic of Midland District, England, Great Britain |
| 8 Aug | 59.7 | Died | Paolo Maurizio Caissotti, C.O. † | Bishop of Asti, Italy |
| 65.4 | Died | Angel Molinos, O.P. † | Bishop of Zamora, Spain |
| 13 Aug | 40.2 | Ordained Bishop | Elléon de Castellane-Mazangues † | Bishop of Toulon, France |
| 18 Aug | | Born | Guglielmo Aretini-Sillani † | Sigillo | Bishop Emeritus of Terracina, Priverno e Sezze, Italy |
| 9 Sep | | Born | Raffaele Biale † | Genova | Bishop of Albenga, Italy |
| 15 Sep | | Born | Franz Anton Gindl † | Ratten | Bishop of Gurk, Austria |
| 17 Sep | | Born | Andrea Rispoli † | Amalfi | Bishop of Squillace, Italy |
| 23 Sep | | Born | John England † | Cork, Ireland | Bishop of Charleston, South Carolina, USA |
| 23.5 | Ordained Priest | Giuseppe Prin † | Priest | Bishop of Susa, Italy |
| 24.2 | Ordained Priest | Gregor von Zirkel † | Priest of Würzburg, Germany | Auxiliary Bishop |
| 24 Sep | | Born | Francesco-Paolo Mastropasqua † | Molfetta | Bishop of Nusco, Italy |
| 1 Oct | 24.4 | Ordained Priest | Stefan (István) Cech (Csech) † | Priest | Bishop of Košice, Slovakia |
| 15 Oct | 53.0 | Ordained Bishop | Manuel Azamor y Ramírez † | Bishop of Buenos Aires, Argentina |
| 74.9 | Died | Bernardo Antonio Calderón Lázaro † | Bishop of Osma, Spain |
| Born | Giovanni Serafini † | Magliano | Cardinal, Priest of the Roman Curia - Other |
| 16 Oct | | Born | Raffaele Blundo † | Arisno | Archbishop of Taranto, Italy |
| 19 Oct | | Succeeded | James Caulfield † | Bishop of Ferns, Ireland |
| 90.8 | Died | Nicholas Sweetman † | Bishop of Ferns, Ireland |
| 24 Oct | | Born | François-Marie-Edouard de Gualy † | Creissels | Archbishop of Albi, France |
| 29 Oct | | Died | John Carpenter † | Archbishop of Dublin, Ireland |
| 30 Oct | 66.1 | Died | Matthias Franz Reichsgraf von Chorinsky † | Bishop of Brno, Czech Republic |
| 5 Nov | 52.6 | Ordained Bishop | Nicolas Champenois, M.E.P. † | Titular Bishop of Doliche | Vicar Apostolic of Verapoly, India |
| 60.9 | Ordained Bishop | Jose Martinez Palomino y Lopez de Lorena † | Bishop of Chiapas (Ciudad Real de Chiapas), Chiapas, México | Bishop of Foreign Diocese |
| 12 Nov | | Ordained Bishop | Gaetano Mantegazza, B. † | Titular Bishop of Maximianopolis in Arabia |
| 15 Nov | | Born | Antonio-Maria Calcagno † | Chioggia | Bishop of Adria, Italy |
| 18 Nov | | Died | André Teixeira Palha † | Bishop of Faro {Algarve}, Portugal |
| 29 Nov | 47.8 | Ordained Bishop | Jean-François Hubert † | Titular Bishop of Halmiros | Bishop Emeritus of Québec, Québec, Canada |
| 2 Dec | | Born | Augustin Bartolomej Hille † | Velkém Šenove | Bishop of Litomĕrice, Czech Republic |
| Died | James O'Fallon † | Bishop of Elphin, Ireland |
| 3 Dec | 47.6 | Appointed | John Thomas Troy, O.P. † | Archbishop of Dublin, Ireland |
| 7 Dec | 45.9 | Appointed | Johann Baptist Lachenbauer, O. Cr. † | Bishop of Brno, Czech Republic |
| 18 Dec | 39.5 | Appointed | Angelo Antonio Anselmi † | Bishop of Terracina, Priverno e Sezze, Italy | Bishop of San Severino, Italy |
| 33.4 | Elevated to Cardinal | Romoaldo Braschi-Onesti † | Cardinal, Archpriest of the Basilica di San Pietro in Vaticano {Saint Peter Basilica} |
| 39.7 | Appointed | José Carrión y Marfil † | Bishop of Cuenca, Ecuador | Bishop Emeritus of Trujillo, Peru |
| 46.5 | Appointed | Pedro José Chávez de la Rosa † | Bishop of Arequipa, Peru | Bishop Emeritus |
| 48.9 | Appointed | Antonio De Rossi † | Bishop of Veroli, Italy |
| 41.1 | Appointed | Felipe Pelaez Caunedo † | Bishop of Lugo, Spain |
| 63.4 | Appointed | Francesco Saverio De Vivo † | Archbishop of Lanciano, Italy | Bishop of Nusco, Italy |
| 21 Dec | 53.1 | Appointed | Giovanni Vincenzo Monforte † | Bishop of Tropea, Italy | Archbishop of Napoli {Naples}, Italy |
| 23 Dec | 24.2 | Ordained Priest | José Ignacio Cienfuegos Arteaga † | Priest of Santiago de Chile | Bishop of Concepción, Chile |
| 23.1 | Ordained Priest | Johann Heinrich Milz † | Priest of Trier, Germany | Auxiliary Bishop |
| 23.0 | Ordained Priest | Carlo Monti † | Priest | Bishop of Cagli e Pergola, Italy |
| 25.3 | Ordained Priest | Dionisio Ridolfini Conestabile † | Priest | Bishop of Viterbo e Tuscania, Italy |
| 24 Dec | 39.5 | Ordained Bishop | Angelo Antonio Anselmi † | Bishop of Terracina, Priverno e Sezze, Italy | Bishop of San Severino, Italy |
| 26 Dec | | Born | Estevam de Jesus Maria † | Vila de Mafra | Bishop of Angra, Portugal |
| 27 Dec | 79.4 | Appointed | Joaquín de Eleta, O.F.M. † | Archbishop (Personal Title) of Osma, Spain | Bishop |