| 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 |
| 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) |
| 28.8 | Incardinated | Godfried Joseph Crüts van Creits † | Priest of Sankt Pölten, Austria | Bishop |
| 37.0 | Selected | Charles-César-Louis d’Agoult de Bonneval † | Bishop of Pamiers, France | Bishop Emeritus |
| 79.0 | Died | Pietro Silvio di Gennaro † | Bishop of Venosa, Italy |
| 52.0 | Ordained Bishop | Boetius Egan † | Bishop of Achonry, Ireland | Archbishop of Tuam, Ireland |
| Appointed | Yuhanna El-Helou (Dolce) † | Auxiliary Bishop of Antiochia {Antioch} (Maronite), Lebanon | Patriarch |
| Appointed | Yuhanna El-Helou (Dolce) † | Titular Bishop of Akka | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| Died | Michel El-Khazen † | Titular Bishop of Caesarea in Palaestina |
| 23.1 | Ordained Priest | Antonio Faà di Bruno † | Priest | Bishop of Asti, Italy |
| 76.0 | Appointed | Michael Fadel † | Bishop of Beirut {Bairut} (Maronite), Lebanon | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 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 Floren, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Siam, Thailand |
| 46.0 | Succeeded | Philippe Gemayel † | Bishop |
| 78.0 | Resigned | Giacinto Giustiniani, O.P. † | Bishop of Syros (e Milos), Greece | Bishop Emeritus |
| Born | Stefano Holas † | Ancira | Bishop of Adana (Armenian), Turkey |
| 24.7 | Ordained Priest | Jean Jacoupy † | Priest | Bishop Emeritus of Agen, France |
| 54.0 | Died | Franciscus Aloysius Junosza Gzowski † | Titular Bishop of Thespiae |
| 73.0 | Died | Henri-Gaston de Lévis-Leran † | Bishop of Pamiers, France |
| Born | Félix Calixto Miranda y Suárez de Figueroa † | Quito | Bishop of Cuenca, Ecuador |
| Born | Daniel O’Connor, O.S.A. † | Ireland | Vicar Apostolic Emeritus of Madras, India |
| 76.8 | 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 |
| 23.3 | Ordained Priest | Simón Antonio de Rentería y Reyes † | Priest | Archbishop of Santiago de Compostela, Spain |
| 24.4 | Ordained Priest | Julián Sanz Palanco † | Priest | Bishop of Segorbe, Spain |
| 25.8 | Appointed | Youssef Tian (Tyen) † | Bishop of Damas (Maronite), Syria | Patriarch Emeritus of Antiochia {Antioch} (Maronite), Lebanon |
| 27.5 | Ordained Priest | Pedro Valero † | Priest | Bishop of Gerona, Spain |
| 1 Jan | 68.8 | Died | Giuseppe Maria Pilo, O. Carm. † | Bishop of Ales e Terralba, Italy |
| 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 |
| 54.8 | Ordained Bishop | Domenico de Jorio † | Titular Bishop of Samaria |
| 16 Jan | 35.0 | Resigned | Józef Leon Łopaciński † | Auxiliary Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania | Auxiliary Bishop Emeritus |
| 19 Jan | | Born | Salvatore Fertitta † | Cefalu | Bishop of Cava e Sarno, Italy |
| 21 Jan | | Born | Luigi Gagliardi † | Barletta | Bishop Emeritus of Ischia, Italy |
| 22 Jan | 70.6 | Died | Antoni Wacław Betański † | Bishop of Przemyśl, Poland |
| 60.5 | Ordained Bishop | Crescentius Maria Grippi † | Titular Bishop of Amorium |
| 29 Jan | 54.9 | Died | Manuel de Vasconcellos Pereira † | Bishop of Lamego, Portugal |
| 2 Feb | | Born | Ignaz Bernhard Mauermann † | Neuzelle | Vicar Apostolic of Saxonia (Saxony), Germany |
| 3 Feb | 64.1 | Died | Josip Galjuf (Gallyuff) † | Bishop of Zagreb (Agram), Croatia |
| 4 Feb | 80.1 | Died | Lazzaro Uladagni † | Archbishop of Bar (Antivari), Montenegro |
| 5 Feb | 56.6 | Ordained Bishop | José López Gil, O. Carm. † | Bishop of Jaca, Spain |
| 8 Feb | | Born | Angelo Antonio Scotti † | Procida | Titular Archbishop of Thessalonica |
| 57.1 | Died | Gian Antioco Serra Urru (Sisra) † | Bishop of Galtelli-Nuoro (Galtelly Nori), Italy |
| 10 Feb | | Born | Vitangelo Salvemini † | Molfetta | Archbishop of Manfredonia (e Vieste), Italy |
| 13 Feb | 40.2 | Installed | Gabriel Cortois de Pressigny † | Bishop of Saint-Malo, France | Archbishop of Besançon, France |
| 19 Feb | 41.6 | Ordained Bishop | Angelinus (Josephus Jacobus) Gaislmayr, O.C.D. † | Titular Bishop of Anthedon |
| 29.6 | Ordained Bishop | François Antoine Marie Constantin de Méan et de Beaurieux † | Titular Bishop of Hippos | Archbishop of Mechelen, Belgium |
| 21 Feb | | Born | Gaspare Pitocchi (Petocchi) † | Terracina | Bishop of Nepi e Sutri, Italy |
| 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}, Viet 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 |
| 27 Feb | 48.3 | Ordained Bishop | Iwo Onufry Rogowski † | Titular Bishop of Camachus | Auxiliary Bishop of Chelmno (Culma, Kulm), Poland |
| 7 Mar | 48.8 | Selected | Franz Egon 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 | 24.3 | Ordained Priest | Pasquale Mazzei † | Priest | Bishop of San Marco e Bisignano, Italy |
| 23.0 | Ordained Priest | Joseph-Octave Plessis † | Priest | Archbishop of 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 |
| 24 Mar | 82.3 | Died | Giovanni Battista Giacobini (Jacobini) † | Bishop of Veroli, Italy |
| 25 Mar | | Born | José María Arriaga † | Piura | Bishop of Chachapoyas, Peru |
| Born | William Hogarth † | Dodding Green, Kendal | Bishop of Hexham and Newcastle, England, Great Britain |
| 29 Mar | 52.2 | Died | Andrea Benedetto Ganassoni, O.S.B. † | Bishop of Feltre, Italy |
| 31 Mar | 77.5 | Resigned | Franciszek Potkański † | Auxiliary Bishop of Kraków, Poland | Auxiliary Bishop Emeritus |
| 1 Apr | 22.6 | Ordained Priest | Andreas Stanislaus von Hattynski (Hatten) † | Priest of Warmia (Ermland), Poland | Bishop |
| 23.1 | Ordained Priest | José de Jesus Maria Pinto, C.R.S.A. † | Priest of Confederation of Canons Regular of St. Augustine | Bishop of Lamego, Portugal |
| 24.8 | Ordained Priest | Jacques de la Brue de Saint-Bauzile † | Priest | Titular Bishop of Tempe |
| 22.1 | Ordained Deacon | Desiderio Mennone, C.SS.R. † | Deacon of Congregation of the Most Holy Redeemer | Bishop of Lacedonia, Italy |
| 2 Apr | 61.3 | Ordained Bishop | Carlo Santacolomba † | Titular Bishop of Anemurium | Prelate of Santa Lucia del Mela, Italy |
| 3 Apr | 48.2 | Appointed | Tiberio Cortese † | Bishop of Modena, Italy |
| 60.4 | Installed | Giuseppe Garampi † | Cardinal-Priest of Santi Giovanni e Paolo | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 60.9 | Confirmed | Florian Amand Janowski, O.S.B. † | Bishop of Tarnów, Poland |
| 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 Santa Maria in Ara Coeli | Cardinal, Cardinal-Bishop of Ostia (e Velletri) |
| 50.9 | Appointed | Józef Olechowski † | Auxiliary Bishop of Kraków, Poland |
| 50.9 | Appointed | Józef Olechowski † | Titular Bishop of Verinopolis | Auxiliary Bishop of Kraków, Poland |
| 37.4 | Appointed | Joannes Petrus Martinus Pellegrini † | Titular Bishop of Palaeopolis in Asia |
| 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 Nicaragua | Archbishop of Guatemala |
| 6 Apr | | Born | Franciszek de Paula Pišték (Pisztek) † | Přiče | Auxiliary Bishop of Praha {Prague}, Czech Republic |
| 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 von Waldburg-Zeil † | Bishop of Chiemsee, Germany |
| 11 Apr | 73.3 | Died | Fernando de Sousa e Silva † | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 15 Apr | 24.1 | Ordained Priest | Giacomo Coccia † | Priest | Prelate of Santa Lucia del Mela, Italy |
| 26.2 | Ordained Priest | Louis-Charles-François de La Tour-Landorte † | Priest | Bishop of Pamiers, France |
| 29.7 | Ordained Deacon | Lorenz Barlomiej Ignacy Antoni Raczyński, O. Cist. † | Deacon of Order of Cistercians | Auxiliary Bishop of Gniezno, Poland |
| 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 Engl von und zu Wagrain † | Bishop of Leoben, Austria |
| 30 Apr | 64.2 | Ordained Bishop | Alexander Franz Joseph 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 |
| 20 May | 78.0 | Died | Giuseppe Tomaso de Rossi † | Bishop of Alessandria (della Paglia), Italy |
| 25 May | | Born | Cornelius Ludovicus van Wijckerslooth van Schalkwijk (Wykerslooth) † | Haarlem, Netherlands | Titular Bishop of Curium |
| 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 |
| 25.4 | Ordained Deacon | Gioacchino Tosi † | Deacon | Bishop Emeritus of Anagni, Italy |
| 11 Jun | | Born | Gianfrancesco Guglielmo Tippmann † | Joachimsthal | Auxiliary Bishop of Praha {Prague}, Czech Republic |
| 25.4 | Ordained Priest | Gioacchino Tosi † | Priest | Bishop Emeritus of Anagni, Italy |
| 12 Jun | 49.1 | Selected | Franz Egon von Fürstenberg † | Coadjutor Bishop of Paderborn, Germany | Bishop of Hildesheim, Germany |
| 15 Jun | 63.1 | Appointed | Franz de Paula Xaver Ludwig Jakob von Breuner † | Bishop of Chiemsee, Germany |
| 18 Jun | 41.9 | Ordained Priest | Giovanni Devoti † | Priest | Bishop Emeritus of Anagni, Italy |
| 24 Jun | 29.9 | Ordained Priest | Lorenz Barlomiej Ignacy Antoni Raczyński, O. Cist. † | Priest of Order of Cistercians | Auxiliary Bishop of Gniezno, Poland |
| 25 Jun | | Born | Peter Augustine Baines, O.S.B. † | Pear Tree Farm, Kirkby, Lancashire | 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 Emeritus of Elvas, Portugal |
| 30 Jun | | Appointed | Thomas Costello † | Coadjutor Bishop of Clonfert, Ireland | Bishop |
| Appointed | Thomas Costello † | Titular Bishop of Aenus | Bishop of Clonfert, Ireland |
| 78.4 | Died | Giovanni Hieronymo Gradenigo, C.R. † | Archbishop of Udine, Italy |