| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Died | Antonio Cavaleri † | Bishop of Agrigento (Girgenti), Italy |
| 22.2 | Ordained Priest | Stanisław Kostka Choromański † | Priest | Archbishop of Warszawa {Warsaw}, Poland |
| Appointed | Bartolomeo Criscuolo † | Bishop of Lettere-Gragnano, Italy |
| 56.0 | Appointed | Bernardo Maria della Torre † | Bishop of Marsico Nuovo, Italy | Bishop of Castellammare di Stabia, Italy |
| 78.9 | Died | Giambattista Donati † | Bishop of Cervia, Italy |
| Appointed | Ferdinando Crispo Doria † | Bishop of Castellammare di Stabia, Italy |
| 26.6 | Ordained Priest | Antonio Fernando Echanove Zaldívar † | Priest | Archbishop of Tarragona, Spain |
| Died | José Ramón de Estrada y Orgas † | Bishop of Santa Cruz de la Sierra, Bolivia |
| Appointed | José Fernández Díaz de la Madrid, O.F.M. † | Bishop of Quito, Ecuador |
| Born | Michael Anthony Fleming, O.F.M. † | Carrick-on-Suir, Ireland | Bishop of Newfoundland, Canada |
| 82.5 | Died | Luigi del Giudice, O.S.B. † | Archbishop of Chieti, Italy |
| 47.2 | Appointed | Francesco Antonio Grillo, O.F.M. Conv. † | Bishop of Martirano (Martoranum), Italy | Bishop of Cassano all’Jonio, Italy |
| 27.2 | Ordained Priest | Rafael Lasso de la Vega † | Priest | Bishop of Quito, Ecuador |
| Appointed | Andrea de Lucia † | Bishop of Calvi, Italy | Bishop of Calvi e Teano, Italy |
| Appointed | Giuseppe Martini † | Bishop of Bova, Italy |
| Appointed | Francisco Monteiro Pereira de Azevedo † | Bishop of Viseu, Portugal |
| 23.7 | Ordained Priest | Daniel Murray † | Priest | Archbishop of Dublin, Ireland |
| Appointed | Salvatore Palica † | Bishop of Bisceglie, Italy |
| 75.7 | Died | Antonio Puoti † | Archbishop of Amalfi, Italy |
| Died | Niccolò Sagredo † | Archbishop of Udine, Italy |
| 16.0 | Professed | Tomás Sala, O.P. † | Member of Order of Friars Preachers | Coadjutor Vicar Apostolic of Fo-Kien, China |
| Died | João Teixeira de Carvalho † | Bishop of Elvas, Portugal |
| 23.2 | Ordained Priest | Juan José Tejada Sáenz, O. de M. † | Priest of Order of Our Lady of Mercy | Bishop of Solsona, Spain |
| 19.0 | Professed | Bonifaz Kaspar von Urban † | Member of Order of St. Augustine | Archbishop of Bamberg, Germany |
| Appointed | Lorenzo M. Varano † | Bishop of Bisignano, Italy |
| 23.2 | Ordained Priest | Teofil von Wolicki † | Priest of Poznań, Poland | Archbishop of Gniezno-Poznań, Poland |
| 52.0 | Resigned | Antonio Felice Zondadari † | Apostolic Nuncio to Belgium | Cardinal, Archbishop of Siena, Italy |
| 4 Jan | | Born | Miguel Salvá Munar † | Algaida | Bishop of Mallorca, Spain |
| 9 Jan | | Born | Ladislao Barone Barkocxy † | Imregh | Bishop of Székesfehérvár (Albareale), Hungary |
| 14 Jan | | Born | Jean-Paul-Hilaire-Michel Courvezy, M.E.P. † | Narbonne, France | Vicar Apostolic Emeritus of Malacca-Singapore |
| 18 Jan | 84.9 | Died | Nicola Molinari, O.F.M. Cap. † | Bishop of Bovino, Italy |
| 2 Feb | | Born | Jacques-Marie-Antoine-Célestin du Pont † | Iglesias, Italy | Cardinal, Archbishop of Bourges, France |
| 9 Feb | | Born | Thomas Cooke † | Pointe-du-Lac | Bishop of Trois Rivières, Québec, Canada |
| 11 Feb | | Born | Daniel-Victor Manglard † | Paris | Bishop of Saint-Dié, France |
| 12 Feb | | Born | Barthélemy Bruguière, M.E.P. † | Raissac d'Aude, France | Vicar Apostolic of Corea |
| 40.0 | Ordained Bishop | John Chisholm † | Titular Bishop of Oreus | Vicar Apostolic of Highland District, Scotland, Great Britain |
| 60.7 | Installed | Franz Philipp Graf von Inzaghi † | Bishop of Gorizia e Gradisca, Italy |
| 67.7 | Ordained Bishop | Juan Antonio de los Tueros † | Archbishop of Burgos, Spain |
| 14 Feb | | Appointed | Vincenzo Sangermano, B. † | Titular Bishop of the Titular See |
| 16 Feb | | Born | Gregorio Iachimowicz † | Podberga | Bishop of Przemyśl (Ukrainian), Poland |
| 17 Feb | 46.1 | Appointed | Giovanni Battista di Mandello, O.F.M. † | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 46.1 | Appointed | Giovanni Battista di Mandello, O.F.M. † | Titular Bishop of the Titular See | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 51.4 | Appointed | Fortunado Pinto † | Bishop of Tricarico, Italy | Archbishop of Salerno (-Acerno), Italy |
| 20 Feb | 53.6 | Appointed | Theodor Freiherr von Brabeck, O.S.B. † | Bishop of Corvey, Germany | Bishop-Elect |
| 71.2 | Died | Mariano Martí † | Bishop of Caracas, Santiago de Venezuela |
| 22 Feb | 50.8 | Appointed | Vincenzo Maria Morelli, C.R. † | Archbishop of Otranto, Italy |
| 27 Feb | 45.8 | Appointed | Francesco Amoroso † | Archbishop of Lanciano, Italy |
| 59.9 | Appointed | Filippo de Aprile † | Bishop of Melfi-Rapolla, Italy |
| 60.2 | Appointed | Stefano Borgia † | Chamberlain (Camerlengo) of the College of Cardinals | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| Appointed | Giovan Battista Brancaccio † | Bishop of Ostuni, Italy |
| 72.1 | Appointed | Gaetano Maria Capece, C.R. † | Archbishop (Personal Title) of Pozzuoli, Italy | Bishop |
| Appointed | Giovanni Giuseppe Danisi (Dalla Croce) † | Bishop of Gallipoli, Italy |
| 52.2 | Appointed | Carmine Fimiani † | Bishop of Nardò, Italy |
| 63.3 | Appointed | Gennaro Clemente Francone † | Archbishop (Personal Title) of Gaeta, Italy | Bishop Emeritus |
| 62.1 | Appointed | Agostino Gervasio, O.S.A. † | Archbishop of Capua, Italy |
| 43.3 | Confirmed | Karl Franz von Lodron † | Bishop of Brixen {Bressanone}, Italy |
| 52.8 | Appointed | Salvatore Maria Lombardi † | Bishop of Andria, Italy |
| 54.3 | Appointed | Vincenzo Lupoli † | Bishop of Telese o Cerreto Sannita, Italy |
| 45.4 | Appointed | Silvestro Miccù, O.F.M. † | Bishop of Ravello-Scala, Italy | Archbishop of Amalfi, Italy |
| Appointed | Andrea Mirelli, O.S.B. † | Archbishop of Chieti, Italy |
| 47.5 | Appointed | Raffaele Mormile, C.R. † | Archbishop of Cosenza, Italy | Archbishop of Palermo, Italy |
| 70.2 | Appointed | Emanuele Maria Pignone del Carretto, O.S.A. † | Bishop of Sessa Aurunca, Italy |
| 51.7 | Appointed | Paolo Pozzuoli † | Bishop of Sant’Agata de’ Goti, Italy |
| 43.8 | Appointed | Gennaro Maria Guevara Suardo, O.S.B. † | Archbishop of Bari (-Canosa), Italy | Bishop of Aversa, Italy |
| Appointed | Gioacchino Vassetta † | Bishop of Castellaneta, Italy |
| 43.0 | Appointed | Nicola Vecchi † | Bishop of Conversano, Italy | Bishop of Teano, Italy |
| 68.6 | Appointed | Francesco Saverio De Vivo † | Archbishop (Personal Title) of Nusco, Italy | Bishop |
| 3 Mar | | Appointed | Giovanni Arcamone † | Bishop of Lucera, Italy |
| 22.9 | Ordained Priest | José Maria de Araújo, O.S.H. † | Priest of Orden de San Jerónimo | Bishop of Olinda, Brazil |
| 72.6 | Appointed | Gian Leonardo Maria Di Fusco, O.P. † | Bishop of Acerra, Italy |
| 4 Mar | 45.4 | Ordained Bishop | Silvestro Miccù, O.F.M. † | Bishop of Ravello-Scala, Italy | Archbishop of Amalfi, Italy |
| 50.9 | Ordained Bishop | Vincenzo Maria Morelli, C.R. † | Archbishop of Otranto, Italy |
| 11 Mar | 25.5 | Ordained Priest | Maurice-Jean-Madeleine de Broglie † | Priest | Bishop of Gent {Ghent, Gand}, Belgium |
| 72.9 | Died | Miguel de Pamplona González Bassecourt, O.F.M. Cap. † | Bishop Emeritus of Arequipa, Peru |
| 12 Mar | 52.4 | Died | Jean-Baptiste-Auguste de Villoutreix de Faye † | Bishop of Oloron, France |
| 17 Mar | 59.5 | Appointed | Giuseppe Corrado Panzini † | Bishop of Ugento, Italy |
| 22 Mar | | Born | Michele Franchini † | Monte Corvino | Bishop of Nicotera-Tropea, Italy |
| 24 Mar | | Born | Jose Epigmenio Villanueva y Gomez de Eguiarreta † | Taxco | Bishop-Elect of Antequera, Oaxaca, México |
| 25 Mar | 43.4 | Ordained Bishop | Karl Franz von Lodron † | Bishop of Brixen {Bressanone}, Italy |
| 65.4 | Died | Carlo Pergami † | Bishop of Gaeta, Italy |
| 26 Mar | 44.8 | Appointed | Angelo Antonio Anselmi † | Bishop of San Severino, Italy |
| 58.4 | Appointed | Giuseppe Maria Beneventi, O.F.M. Conv. † | Bishop of Muro Lucano, Italy |
| 61.1 | Appointed | Michelangelo Calandrelli, O.S.A. † | Bishop of Acerno, Italy |
| 57.9 | Appointed | Luca Nicola De Luca † | Bishop of Trivento, Italy | Bishop Emeritus |
| 63.2 | Appointed | Sebastiano de Rosa † | Bishop of Avellino-Frigento, Italy |
| 57.8 | Appointed | Francesco Antonio Duca † | Bishop of Castro di Puglia, Italy |
| 51.7 | Appointed | Francesco Saverio Gualtieri † | Bishop of L’Aquila, Italy | Bishop of Caserta, Italy |
| 71.1 | Appointed | Donato de' Liguori † | Bishop of Venafro, Italy |
| 44.9 | Appointed | Lodovico Lodovici da Ebulo, O.F.M. † | Bishop of Crotone (Cotrone), Italy |
| 73.9 | Appointed | Carlo Nicodemi † | Bishop of Sant’Angelo dei Lombardi-Bisaccia, Italy |
| 63.8 | Appointed | Raffaele Pasca, O.S.B. † | Bishop of Teano, Italy |
| 65.8 | Appointed | Giovanni Saverio Pirelli † | Bishop of Ariano, Italy |
| 62.3 | Appointed | Giuseppe Domenico Porqueddu † | Bishop of Iglesias, Italy |
| 70.2 | Appointed | Lorenzo Potenza † | Bishop of Sarno, Italy |
| 66.9 | Appointed | Pasquale Sansone † | Bishop of Ischia, Italy |
| 45.8 | Appointed | Salvatore Spinelli, O.S.B. † | Bishop of Lecce, Italy | Archbishop of Salerno, Italy |
| 30 Mar | 47.0 | Installed | Antonio Despuig y Dameto † | Bishop of Orihuela, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |
| 4 Apr | | Born | Marie-Dominique-Auguste Sibour † | Saint-Paul-Trois-Châteaux | Archbishop of Paris, France |
| 7 Apr | 23.0 | Ordained Priest | Anselmo Basilici † | Priest | Bishop of Nepi e Sutri, Italy |
| 42.3 | Ordained Priest | Pietro Gravina † | Priest | Cardinal, Archbishop of Palermo, Italy |
| 22.3 | Ordained Priest | Kajetan von Kowalski † | Priest of Poznań, Poland | Auxiliary Bishop of Gniezno-Poznań, Poland |
| 9 Apr | | Born | Adalberto Bartakovics † | Felso Elephant | Archbishop of Eger, Hungary |
| 58.4 | Ordained Bishop | Giuseppe Maria Beneventi, O.F.M. Conv. † | Bishop of Muro Lucano, Italy |
| 61.1 | Ordained Bishop | Michelangelo Calandrelli, O.S.A. † | Bishop of Acerno, Italy |
| 63.8 | Ordained Bishop | Raffaele Pasca, O.S.B. † | Bishop of Teano, Italy |
| 11 Apr | 62.3 | Appointed | Manuel Abad Lasierra † | Titular Archbishop of Selymbria | Bishop Emeritus of Astorga, Spain |
| 16 Apr | | Born | Filippo de Angelis † | Ascoli Pisceno | Cardinal, Archbishop of Fermo, Italy |
| 21 Apr | | Born | Lorenzo Pontillo † | Casanuova | Archbishop of Cosenza, Italy |
| 24 Apr | 45.8 | Appointed | Jean-Siffrein Maury † | Titular Archbishop of Nicaea | Cardinal, Bishop Emeritus of Montefiascone, Italy |
| 29 Apr | 43.7 | Ordained Bishop | Luiz de Brito Homem † | Bishop of Angola e Congo, Angola | Bishop of São Luís do Maranhão, Brazil |
| 53.0 | Ordained Bishop | Miguel da Madre de Deus da Cruz, O.F.M. † | Bishop of São Paulo, Brazil | Archbishop of Braga, Portugal |
| 1 May | | Born | Thomas-Marie-Joseph Gousset † | Montigny-les-Cherlieux | Cardinal, Archbishop of Reims, France |
| 45.8 | Ordained Bishop | Jean-Siffrein Maury † | Titular Archbishop of Nicaea | Cardinal, Bishop Emeritus of Montefiascone, Italy |
| 3 May | 72.3 | Installed | Gaetano Maria Capece, C.R. † | Archbishop (Personal Title) of Pozzuoli, Italy | Bishop |
| 4 May | 66.5 | Died | Giuseppe Garampi † | Cardinal, Bishop of Montefiascone, Italy |
| 13 May | | Born | Bl. Giovanni Maria Mastai-Ferretti † | Senigallia, Italy | Pope (Roma {Rome}, Italy) |
| 21 May | 68.2 | Died | Agustín Benito Torres, O. Carm. † | Bishop of Albarracin, Spain |
| 22 May | 83.4 | Died | Giuseppe Luigi Avogadro, C.R.L. † | Bishop of Casale Monferrato, Italy |
| 24 May | 51.1 | Installed | Vincenzo Maria Morelli, C.R. † | Archbishop of Otranto, Italy |
| 27 May | 65.7 | Ordained Bishop | Francisco de Ibarra y Herrera † | Bishop of Santo Tomás de Guayana, Venezuela | Archbishop of Caracas, Santiago de Venezuela |
| 2 Jun | | Born | Gaspard-Joseph Labis † | Warcoing | Bishop of Tournai {Doornik}, Belgium |
| 23.5 | Ordained Priest | Ambrose Maréchal, P.S.S. † | Priest of Society of Priests of St. Sulpice | Archbishop of Baltimore, Maryland, USA |
| 43.3 | Appointed | Franz Xaver Freiherr von Neveu † | Bishop of Basel, Switzerland |
| 24.5 | Ordained Priest | Francisco de São Damazo Abreu Vieira, O.F.M. † | Priest of Order of Friars Minor | Archbishop of São Salvador da Bahia, Brazil |
| 3 Jun | 43.5 | Ordained Bishop | Andrés Ambrosio de Llanos y Valdés, O.F.M. † | Bishop of Linares o Nueva León, Nuevo León, México | Bishop of Chiapas (Ciudad Real de Chiapas), Chiapas, México |
| 4 Jun | 67.8 | Died | César Constantin François de Hoensbroeck † | Bishop of Liège, Belgium |
| 15 Jun | 68.3 | Died | Luis Velasco, O.F.M. † | Bishop of Paraguay |
| 16 Jun | 83.0 | Died | Jean-Baptiste-Amédée de Grégoire de Saint-Sauveur † | Bishop of Bazas, France |
| 17 Jun | 75.8 | Died | Rafael Lasala Locela, O.S.A. † | Bishop of Solsona, Spain |
| 18 Jun | 52.8 | Appointed | Agostino Adriani † | Bishop of Mottola (Motula), Italy |
| Appointed | Enrico Capece Minutolo, C.O. † | Bishop of Mileto, Italy |
| 59.1 | Elevated to Cardinal | Giovanni Battista Caprara Montecuccoli † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 46.7 | Appointed | Remigio de La Santa y Ortega † | Bishop of Panamá | Bishop of Lérida, Spain |
| 56.8 | Appointed | Johann Maximilian Freiherr von Haunold † | Auxiliary Bishop of Mainz, Germany |
| 56.8 | Appointed | Johann Maximilian Freiherr von Haunold † | Titular Bishop of Emmaüs | Auxiliary Bishop of Mainz, Germany |
| 65.6 | Appointed | Luigi Trasmondi † | Archbishop of Trani, Italy |
| 24 Jun | 23.9 | Ordained Priest | Hugues-Robert-Jean-Charles de la Tour d'Auvergne-Lauraquais † | Priest | Cardinal, Bishop of Arras, France |