| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Gabriele Barissich Bosniese, O.F.M. † | | Bishop of Lezhë {Lesh, Alessio}, Albania |
| 21.3 | Ordained Priest | Bartolomeo Alberto (Mauro) Cappellari, O.S.B. † | Priest of Order of Saint Benedict | Pope (Roma {Rome}, Italy) |
| 21.9 | Ordained Priest | Francisco Ramón Valentín de Casaus y Torres, O.P. † | Priest of Order of Friars Preachers | Archbishop of Guatemala |
| Born | François Cuculla † | Syros | Archbishop of Naxos, Greece |
| 42.4 | Appointed | Giulio Maria della Somaglia † | Secretary of the Congregation of Bishops and Regulars | Cardinal, Archivist of the Vatican Secret Archives |
| Appointed | Ignace El-Khazen † | Bishop |
| Ordained Bishop | Ignace El-Khazen † | Bishop |
| 24.0 | Ordained Priest | Joseph Fesch † | Priest | Cardinal, Archbishop of Lyon (-Vienne), France |
| Born | Francis Haly † | | Bishop of Kildare and Leighlin, Ireland |
| Born | Myles Murphy † | Oulart prope Gouy | Bishop of Ferns, Ireland |
| 25.9 | Ordained Priest | Antonio Pérez de Hirias † | Priest | Bishop of Mallorca, Spain |
| Died | Philip Phillips † | Archbishop of Tuam, Ireland |
| Born | Agapios Riachi (Riecji) † | Kensciara | Archbishop of Beirut {Bairut} (Melkite Greek), Lebanon |
| 52.6 | Resigned | Léon-François-Ferdinand de Salignac de La Mothe-Fénelon † | Bishop of Lombez, France | Bishop Emeritus |
| 17.9 | Professed | Joachin (Gioacchino Domenico) Salvetti, O.F.M. † | Member of Order of Friars Minor | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 1 Jan | | Born | Daniel Latussek † | Groß Wartenberg | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 3 Jan | 59.8 | Selected | Joseph-Marie Paget † | Bishop of Genève {Geneva}, Switzerland | Bishop Emeritus |
| 5 Jan | 39.3 | Succeeded | Michal Mateusz Stadnicki, O.S.B.M. † | Bishop of Foreign Diocese |
| 52.6 | Died | Cyprian Stecki † | Bishop |
| 6 Jan | | Born | Jacques-Léonard Pérocheau, M.E.P. † | Les Sables-d'Olonne, France | Vicar Apostolic of Northwestern Szechwan {Se-Ciuen Settentrionale-Occidentale}, China |
| 14 Jan | 71.6 | Died | Antonio Casali † | Cardinal, Cardinal-Deacon of Santa Maria ad Martyres |
| 21 Jan | | Born | Manuel Grijalvo y Mínguez, O.S.A. † | Los Balbases, Spain | Bishop of Nueva Caceres, Philippines |
| 23 Jan | | Born | Raffaele Fornari † | Rome, Italy | Cardinal, Prefect of the Congregation for Studies |
| 26 Jan | 59.9 | Died | Georgius Giunchi † | Bishop of Bar (Antivari), Montenegro |
| 28 Jan | 54.7 | Died | Vitale Giuseppe de’ Buoi † | Bishop of Faenza, Italy |
| 29 Jan | 44.0 | Appointed | Ignazio-Gaetano Boncompagni-Ludovisi † | Cardinal-Deacon of Santa Maria ad Martyres | Cardinal, Secretary Emeritus of the Secretariat of State |
| 33.5 | Installed | Romoaldo Braschi-Onesti † | Cardinal-Deacon of San Nicola in Carcere | Cardinal, Archpriest of the Basilica di San Pietro in Vaticano {Saint Peter Basilica} |
| 57.4 | Elevated to Cardinal | Filippo Carandini † | Cardinal, Cardinal-Deacon of Sant’Eustachio |
| 46.0 | Confirmed | Johann Baptist Lachenbauer, O. Cr. † | Bishop of Brno, Czech Republic |
| 40.2 | Appointed | Guglielmo Stagno † | Auxiliary Bishop of Messina, Italy |
| 40.2 | Appointed | Guglielmo Stagno † | Titular Bishop of Theveste | Auxiliary Bishop of Messina, Italy |
| 2 Feb | 58.1 | Died | Pellegrino Consalvi † | Bishop of Fano, Italy |
| 6 Feb | 46.8 | Died | Jacques-Joseph-François de Vogüé † | Bishop of Dijon, France |
| 7 Feb | | Born | Romualdo Antônio de Seixas Barroso † | Cametá | Archbishop of São Salvador da Bahia, Brazil |
| 10 Feb | 51.5 | Died | Franciscus Carolus Palma † | Auxiliary Bishop of Kalocsa, Hungary |
| 12 Feb | | Born | Joseph Norbert Provencher † | Nicolet | Bishop of Saint-Boniface, Manitoba, Canada |
| 13 Feb | | Appointed | Edward French † | Bishop of Elphin, Ireland |
| 15 Feb | 75.3 | Died | Anton Ignaz von Fugger-Glött † | Bishop of Regensburg, Germany |
| 16 Feb | 28.0 | Ordained Priest | Aeneas Bernard MacEachern † | Priest of Québec, Canada | Bishop of Charlottetown, Prince Edward Island, Canada |
| 24.6 | Ordained Priest | Alexander MacDonell † | Priest | Bishop of Kingston, Ontario, Canada |
| 18 Feb | | Born | Giacomo Francesco Cometti † | Roma | Titular Archbishop of Nicomedia |
| 22 Feb | 46.1 | Ordained Bishop | Johann Baptist Lachenbauer, O. Cr. † | Bishop of Brno, Czech Republic |
| Born | Giuseppe Antonio Zacchia Rondinini † | Vezzano, Italy | Cardinal, Priest of the Roman Curia - Other |
| 25 Feb | 44.6 | Selected | René des Monstiers de Mérinville † | Bishop of Dijon, France | Bishop Emeritus of Chambéry, France |
| 3 Mar | 25.4 | Ordained Priest | Giovanni De Simone, C.M. † | Priest of Congregation of the Mission | Bishop of Conversano, Italy |
| 5 Mar | 77.0 | Died | Francesco Maria Forlani † | Bishop of Civita Castellana e Orte, Italy |
| 6 Mar | 57.5 | Died | Antonio María de los Reyes Almada, O.F.M. † | Bishop of Sonora, México |
| 14 Mar | 65.8 | Died | Antonio Andrés López Arroyo, O.F.M. † | Bishop of Astorga, Spain |
| 17 Mar | | Born | Martino Caliendi † | Scavolino | Bishop of Montefeltro, Italy |
| Born | Carlo Giuseppe Benedetto Mercy d’Argenteau † | Liegi | Apostolic Nuncio Emeritus to Monaco |
| 21 Mar | 75.2 | Died | Giovanni Battista Mami † | Bishop of Sarsina, Italy |
| 23 Mar | 23.5 | Ordained Priest | Francisco Alexandre Lobo, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Viseu, Portugal |
| 24 Mar | 23.1 | Ordained Priest | Karl Adalbert von Beyer, O. Praem. † | Priest of Order of the Canons Regular of Premontre; Norbertines | Auxiliary Bishop of Köln {Cologne}, Germany |
| 22.1 | Ordained Deacon | Francisco Ferreira de Azevedo † | Deacon | Bishop of Goiás, Brazil |
| 24.0 | Ordained Priest | Pietro Gravina Luzzena † | Priest of Catania, Italy | Auxiliary Bishop |
| 24.5 | Ordained Priest | Marie-Joseph-Antoine-Laurent de la Rivoire de La Tourette † | Priest | Bishop of Valence, France |
| 24.6 | Ordained Deacon | Jan Chrzciciel Louis Masclet, O.M. † | Deacon of Order of the Minims | Auxiliary Bishop of Minsk, Belarus |
| 23.0 | Ordained Priest | Giuseppe Maria Pellicano † | Priest | Bishop of Gerace, Italy |
| 26 Mar | 11.8 | Ordained Priest | Jan Nepomucen Kossakowski † | Priest | Bishop of Vilnius, Lithuania |
| 3 Apr | 68.7 | Died | Tommaso Maria Ghilini † | Cardinal, Cardinal-Priest of Santa Maria sopra Minerva |
| 34.8 | Appointed | Jacques-Benjamin Longer, M.E.P. † | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam | Vicar Apostolic |
| 34.8 | Appointed | Jacques-Benjamin Longer, M.E.P. † | Titular Bishop of Gortyna | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 61.2 | Appointed | Mariano Zaralli, O.F.M. † | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 61.2 | Appointed | Mariano Zaralli, O.F.M. † | Titular Bishop of the Titular See | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 4 Apr | 79.5 | Died | Francesco d’Elci † | Cardinal, Cardinal-Deacon of Sant’Angelo in Pescheria |
| Born | Alessandro Spada † | Rome, Italy | Cardinal, Priest of the Roman Curia - Other |
| 5 Apr | 84.4 | Died | Tommaso Mazza † | Bishop of Castellammare di Stabia, Italy |
| 7 Apr | 23.1 | Ordained Priest | Jean-Joseph-Marie-Victoire de Cosnac † | Priest | Archbishop of Sens (-Auxerre), France |
| 41.4 | Ordained Priest | Franz Karl Joseph von Hohenlohe-Waldenburg-Schillingsfürst † | Priest of Köln {Cologne}, Germany | Bishop of Augsburg, Germany |
| 15 Apr | 42.3 | Ordained Bishop | Arnaud-Antoine Garnault, M.E.P. † | Titular Bishop of Metellopolis | Vicar Apostolic of Siam, Thailand |
| 16 Apr | 60.7 | Ordained Bishop | Moyses Drágosi † | Bishop of Oradea Mare {Gran Varadino} (Romanian), Romania |
| 20 Apr | | Born | Juraj Haulík Váralyai † | Trnave, Slovakia | Cardinal, Archbishop of Zagreb, Croatia |
| 47.5 | Selected | Max Polykarp von Törring-Jettenbach † | Bishop of Regensburg, Germany |
| 22 Apr | 63.9 | Installed | Franz de Paula Xaver Ludwig Jakob von Breuner † | Bishop of Chiemsee, Germany |
| 23 Apr | 62.4 | Appointed | Vincenzo Maria Altieri † | Cardinal-Deacon of Sant’Angelo in Pescheria | |
| 36.3 | Appointed | Francesco Borzi † | Bishop of Shkodrë (Scutari), Albania | Archbishop of Bar (Antivari), Montenegro |
| 57.6 | Installed | Filippo Carandini † | Cardinal-Deacon of Santa Maria in Portico (Campitelli) | Cardinal, Cardinal-Deacon of Sant’Eustachio |
| 43.7 | Appointed | Nicolaus Casali † | Bishop of Sarsina, Italy |
| 38.3 | Confirmed | Charles-César-Louis d’Agoult de Bonneval † | Bishop of Pamiers, France | Bishop Emeritus |
| 51.7 | Appointed | Lorenzo de Dominicis † | Bishop of Civita Castellana e Orte, Italy | Bishop of Civita Castellana, Orte e Gallese, Italy |
| Born | Youssef Hobaish (Habaisci) † | Sahel Aalma | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 53.4 | Appointed | Domenico Mancinforte † | Bishop of Faenza, Italy |
| 30.6 | Appointed | José Maria de Melo, C.O. † | Bishop of Faro {Algarve}, Portugal | Bishop Emeritus |
| 44.8 | Confirmed | René des Monstiers de Mérinville † | Bishop of Dijon, France | Bishop Emeritus of Chambéry, France |
| 60.1 | Confirmed | Joseph-Marie Paget † | Bishop of Genève {Geneva}, Switzerland | Bishop Emeritus |
| 52.0 | Appointed | Antonio Puñuela Alonso † | Bishop of Zamora, Spain |
| 66.1 | Appointed | Wojciech Józef Radoszewski † | Auxiliary Bishop of Kraków, Poland |
| 66.1 | Appointed | Wojciech Józef Radoszewski † | Titular Bishop of Hirina | Auxiliary Bishop of Kraków, Poland |
| 53.3 | Appointed | Georgius Angelus Radovani † | Archbishop of Bar (Antivari), Montenegro |
| Born | Anastasius Johannes Sedlag † | Dittmerau | Bishop of Chelmno (Culma, Kulm), Poland |
| 30.2 | Appointed | Antonio Gabriele Severoli † | Bishop of Fano, Italy | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 24 Apr | 29.1 | Appointed | Jozafat Bulhak, O.S.B.M. † | Coadjutor Bishop of Pińsk-Turow (Ukrainian), Belarus | Bishop of Kyiv-Halyč {Kiev} (Ruthenian), Ukraine |
| 6 May | 53.4 | Ordained Bishop | Domenico Mancinforte † | Bishop of Faenza, Italy |
| 41.5 | Ordained Bishop | Felipe Pelaez Caunedo † | Bishop of Lugo, Spain |
| 13 May | 43.8 | Ordained Bishop | Nicolaus Casali † | Bishop of Sarsina, Italy |
| 38.4 | Ordained Bishop | Charles-César-Louis d’Agoult de Bonneval † | Bishop of Pamiers, France | Bishop Emeritus |
| 51.8 | Ordained Bishop | Lorenzo de Dominicis † | Bishop of Civita Castellana e Orte, Italy | Bishop of Civita Castellana, Orte e Gallese, Italy |
| Born | Antônio Ferreira Viçoso, C.M. † | Peniche, Portugal | Bishop of Mariana, Brazil |
| 44.9 | Ordained Bishop | René des Monstiers de Mérinville † | Bishop of Dijon, France | Bishop Emeritus of Chambéry, France |
| 30.2 | Ordained Bishop | Antonio Gabriele Severoli † | Bishop of Fano, Italy | Cardinal, Bishop of Viterbo e Tuscania, Italy |
| 22 May | 80.4 | Died | Gottfried Xaver von Laimbeckhoven, S.J. † | Bishop of Nanking [Nanjing], China |
| 24 May | | Born | Juan Gregorio Urbieta † | Villeta | Bishop of Paraguay |
| 25 May | | Born | Louis-Robert Paysant † | Crosville-sur-Douves | Bishop of Angers, France |
| 27 May | 60.2 | Ordained Bishop | Joseph-Marie Paget † | Bishop of Genève {Geneva}, Switzerland | Bishop Emeritus |
| 2 Jun | 25.0 | Ordained Priest | Giovanni Francesco Capelletti † | Priest | Bishop of Ascoli Piceno, Italy |
| 42.8 | Ordained Priest | Giulio Maria della Somaglia † | Priest | Cardinal, Archivist of the Vatican Secret Archives |
| 24.0 | Ordained Priest | Gervais-Marie-Joseph Ortric † | Priest | Bishop of Pamiers, France |
| 25.6 | Ordained Priest | Charles-André-Toussaint-Bruno de Ramond-Lalande † | Priest | Bishop of Rodez, France |
| 23.7 | Ordained Deacon | Jan Jerzy Wilkxycki † | Deacon of Chelmno (Culma, Kulm), Poland | Auxiliary Bishop |
| 3 Jun | | Resigned | John Butler † | Bishop of Cork, Ireland | Bishop Emeritus |
| 30.7 | Ordained Bishop | José Maria de Melo, C.O. † | Bishop of Faro {Algarve}, Portugal | Bishop Emeritus |
| 12 Jun | 76.1 | Died | Ciriaco Vecchioni † | Bishop of Recanati e Loreto, Italy |
| 17 Jun | 25.6 | Ordained Priest | St. Ignacio Clemente Delgado Cebrián, O.P. † | Priest of Order of Friars Preachers | Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viet Nam |
| 24.0 | Ordained Priest | Pietro-Paolo Presicce, O.S.A. † | Priest of Order of St. Augustine | Bishop of Tricarico, Italy |
| 18 Jun | 43.4 | Selected | Karl Theodor von Dalberg † | Coadjutor Bishop of Worms, Germany | Bishop |
| Born | Luigi Landi-Vittori † | Cori | Bishop of Assisi, Italy |
| 19 Jun | 51.8 | Appointed | Francis Moylan † | Bishop of Cork, Ireland |
| 41.5 | Appointed | Gerard Teahan (Teaghan) † | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| 30 Jun | | Born | Rémi Gaulin † | Quebec City | Bishop of Kingston, Ontario, Canada |