| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | William Abraham † | | Bishop of Waterford and Lismore, Ireland |
| 55.9 | Died | José Andrés de Achurra y Núñez del Arco † | Bishop of Trujillo, Peru |
| 31.9 | Ordained Priest | Ildefonso Cañedo y Vigil † | Priest | Archbishop of Burgos, Spain |
| Born | Michel Cattoula (Kattula) † | | Archbishop of Seert (Chaldean), Turkey |
| Born | Laurent Thomas Choa (Sho'a) † | | Archbishop of Kerkūk (Chaldean), Iraq |
| 22.1 | Ordained Priest | Stanisław Henryk Lubicz Choromański † | Priest | Archbishop of Warszawa {Warsaw}, Poland |
| 61.1 | Died | Kryspin Cieszkowski † | Auxiliary Bishop of Lviv, Ukraine |
| 23.0 | Ordained Priest | Bartholomew Crotty † | Priest of Cork, Ireland | Bishop of Cloyne and Ross, Ireland |
| 76.8 | Died | Giambattista Donati † | Bishop of Cervia, Italy |
| 26.5 | Ordained Priest | Antonio Fernando José de Echánove y Zaldívar † | Priest | Archbishop of Tarragona, Spain |
| 54.3 | Died | Ramón José de Estrada y Orgas † | Bishop of Santa Cruz de la Sierra, Bolivia |
| Born | Michael Anthony Fleming, O.F.M. Ref. † | | Bishop of Newfoundland, Canada |
| 37.8 | Ordained Priest | José González de Cándamo y Cauniego † | Priest | Auxiliary Bishop of San Cristobal de la Habana, Cuba |
| 27.1 | Ordained Priest | Rafael Lasso de la Vega † | Priest | Bishop of Quito, Ecuador |
| Appointed | Philippe Legrand † | Prefect of French Guiana-Cayenne, Antilles |
| Born | Denis Lyons † | | Priest of Cork, Ireland |
| 47.2 | Ordained Bishop | Michael Mdzewski † | Titular Bishop of Dercos (Dercus) | Auxiliary Bishop of Płock, Poland |
| 24.5 | Ordained Priest | Augustin-Louis de Montblanc † | Priest | Archbishop of Tours, France |
| 27.0 | Incardinated | George Thomas Plunkett † | Priest of Gent {Ghent, Gand}, Belgium | Bishop of Elphin, Ireland |
| 24.0 | Ordained Priest | Giovanni Portelli † | Priest of Lipari, Italy | Bishop |
| 24.0 | Ordained Priest | Adam Michal Prażmowski † | Priest | Bishop of Płock, Poland |
| 16.0 | Professed | Tomás Sala, O.P. † | Member of Order of Friars Preachers | Coadjutor Vicar Apostolic of Fukien, Chekiang, and Kiangsi, China |
| 23.2 | Ordained Priest | Juan José Tejada Sáenz, O. de M. † | Priest of Order of Our Lady of Mercy | Bishop of Solsona, Spain |
| 18.9 | Professed | Bonifaz Kaspar von Urban † | Member of Order of Hermits of St. Augustine | Archbishop of Bamberg, Germany |
| 23.1 | Ordained Priest | Teofil von Wolicki † | Priest of Poznań, Poland | Archbishop of Gniezno e Poznań, Poland |
| 4 Jan | | Born | Miguel Salvá y Munar † | | Bishop of Mallorca y Ibiza, Spain |
| 8 Jan | 78.9 | Died | Gregorio Lazzari, O.S.B. † | Archbishop of Dubrovnik (Ragusa), Croatia |
| 9 Jan | | Born | László Barkóczy † | | Bishop of Székesfehérvár (Albareale), Hungary |
| 11 Jan | 62.0 | Selected | Giuseppe Domenico Porqueddu † | Bishop of Iglesias, Italy |
| 13 Jan | | Appointed | Adrian Butrymowicz, O.S.B.M. † | Auxiliary Bishop of Kyiv-Halyč {Kiev} (Ukrainian), Ukraine | Auxiliary Bishop of Brėst (Ukrainian) |
| Appointed | Adrian Butrymowicz, O.S.B.M. † | Titular Bishop of Calama | Auxiliary Bishop of Brėst (Ukrainian) |
| 14 Jan | | Born | Jean-Paul-Hilaire-Michel Courvezy, M.E.P. † | | Vicar Apostolic Emeritus of Malacca-Singapore |
| 16 Jan | 82.5 | Died | Jean-Baptiste-Amédée de Grégoire de Saint-Sauveur † | Bishop of Bazas, France |
| 18 Jan | 84.8 | Died | Nicola Molinari, O.F.M. Cap. † | Bishop of Bovino, Italy |
| 20 Jan | 58.1 | Selected | Giuseppe Maria Beneventi, O.F.M. Conv. † | Bishop of Muro Lucano, Italy |
| 60.9 | Selected | Michelangelo Calandrelli, O.E.S.A. † | Bishop of Acerno, Italy |
| 58.3 | Selected | Antonio Cresi † | Bishop of Ortona a Mare e Campli, Italy |
| 45.9 | Selected | Giovanni Gaetano del Muscio, Sch. P. † | Bishop of Carinola (Calina), Italy | Archbishop of Manfredonia, Italy |
| 45.1 | Selected | Bernardo Maria della Torre † | Bishop of Marsico Nuovo, Italy | Bishop of Castellammare di Stabia, Italy |
| 51.9 | Selected | Carmine Fimiani † | Bishop of Nardò, Italy |
| 64.1 | Selected | Gaetano Maria Garrasi, O.E.S.A. † | Archbishop of Messina, Italy |
| 52.3 | Selected | Vincenzo Greco † | Bishop of Belcastro, Italy |
| 51.4 | Selected | Francesco Saverio Gualtieri † | Bishop of L’Aquila, Italy | Bishop of Caserta, Italy |
| 70.9 | Selected | Donato de’ Liguori † | Bishop of Venafro, Italy |
| 44.7 | Selected | Ludovico Ludovici (Ludovico), O.F.M. Obs. † | Bishop of Crotone (Cotrone), Italy | Bishop of Policastro, Italy |
| 45.5 | Selected | Giovanni Battista Marchese † | Bishop of Catanzaro, Italy |
| 49.7 | Selected | Giuseppe Marra † | Bishop of Nicotera, Italy |
| 45.3 | Selected | Silvestro (Jean Baptiste) Miccù, O.F.M. Obs. † | Bishop of Ravello e Scala, Italy | Archbishop of Amalfi, Italy |
| 63.6 | Selected | Raffaele Pasca, O.S.B. † | Bishop of Teano, Italy |
| 66.7 | Selected | Pasquale Sansone † | Bishop of Ischia, Italy |
| 38.9 | Selected | Alessandro Tommasini † | Bishop of Oppido Mamertina, Italy | Archbishop of Reggio Calabria, Italy |
| 22 Jan | 59.9 | Ordained Bishop | Giuseppe Rossi † | Titular Archbishop of Nicosia |
| 24 Jan | 76.1 | Died | Anzelmo (Nicolò) Katić (Cattich), O.F.M. Obs. † | Bishop of Trebinje e Mrkan, Bosnia and Herzegovina |
| 1 Feb | | Born | Jacques-Marie-Antoine-Célestin du Pont † | | Cardinal, Archbishop of Bourges, France |
| 9 Feb | | Born | Thomas Cooke † | | Bishop of Trois-Rivières, Québec, Canada |
| 11 Feb | | Born | Daniel-Victor Manglard † | | Bishop of Saint-Dié, France |
| 12 Feb | | Born | Barthélemy Bruguière, M.E.P. † | | 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 von Inzaghi † | Bishop of Gorizia e Gradisca, Italy |
| 67.6 | Ordained Bishop | Juan Antonio de los Tueros † | Archbishop of Burgos, Spain |
| 14 Feb | 46.1 | Appointed | Giovanni Battista di Mandello, O.F.M. Obs. † | Vicar Apostolic of Hukwang, Shansi [Shanxi], and Shensi [Shaanxi], China |
| 46.1 | Appointed | Giovanni Battista di Mandello, O.F.M. Obs. † | Titular Bishop of Croae | Vicar Apostolic of Hukwang, Shansi [Shanxi], and Shensi [Shaanxi], China |
| 34.1 | Appointed | Vincenzo Sangermano, B. † | Coadjutor Vicar Apostolic of Ava e Pegù, Myanmar | Priest of Clerics Regular of St. Paul |
| 34.1 | Appointed | Vincenzo Sangermano, B. † | Titular Bishop of Auzia | Priest of Clerics Regular of St. Paul |
| 15 Feb | 52.5 | Selected | Agostino Andriani † | Bishop of Mottola (Motula), Italy |
| 59.4 | Selected | Giuseppe Corrado Panzini † | Bishop of Ugento, Italy |
| 46.6 | Selected | Felice Antonio d’Alessandria † | Bishop of Cariati e Cerenzia, Italy |
| 51.6 | Selected | Michele de Angelis † | Bishop of Gravina (di Puglia), Italy |
| 57.7 | Selected | Francesco Antonio Duca † | Bishop of Castro di Puglia, Italy |
| 58.4 | Selected | Gennaro Fortunato † | Bishop of Lavello, Italy |
| 54.2 | Selected | Salvatore Gonnelli † | Bishop of Venosa, Italy |
| 47.2 | Selected | Francesco Antonio Grillo, O.F.M. Conv. † | Bishop of Martirano (Martoranum), Italy | Bishop of Cassano all’Jonio, Italy |
| 63.4 | Selected | Giuseppe Martini † | Bishop of Bova, Italy |
| 55.2 | Selected | Pasquale Martini † | Bishop of Città Ducale, Italy |
| 59.2 | Selected | Giuseppe Mormile, C.R. † | Titular Archbishop of Nazareth |
| 60.8 | Selected | Salvatore Palica, O.S.B. † | Bishop of Bisceglie, Italy |
| 66.2 | Selected | Anselmo Maria Toppi, O.S.B. † | Bishop of Termoli, Italy |
| 65.2 | Selected | Luigi Trasmondi, O.S.B. † | Archbishop of Trani, Italy |
| 56.2 | Selected | Lorenzo Maria (Pietro Felice) Varano, O.P. † | Bishop of Bisignano, Italy |
| 52.3 | Selected | Angelo Maria (Giuseppe Caesar Augustus) Vassalli, O.S.B. † | Bishop of Massa Lubrense, Italy |
| 16 Feb | | Born | Hryhorij Jachimowicz † | | Archbishop of Lviv (Ukrainian), Ukraine |
| 20 Feb | 71.1 | Died | Mariano Martí † | Bishop of Caracas, Santiago de Venezuela |
| 26 Feb | 44.6 | Selected | [Jean-Baptiste Gratien (Graziani)], C.M. † | Bishop of [Seine-Inférieure (Constitutional), France] |
| 27 Feb | 45.7 | Confirmed | Francesco Amoroso † | Archbishop of Lanciano, Italy |
| 59.9 | Confirmed | Filippo d’Aprile † | Bishop of Melfi e Rapolla, Italy |
| 59.2 | Confirmed | Giovanni Arcamone, C.R. † | Bishop of Lucera, Italy |
| 61.6 | Confirmed | Giovanni Battista Brancaccio † | Bishop of Ostuni, Italy |
| 60.4 | Resigned | Ignazio Busca † | Chamberlain (Camerlengo) of the College of Cardinals | Cardinal, Cardinal-Priest of Santa Maria degli Angeli |
| 72.1 | Confirmed | Gaetano Maria Capece, C.R. † | Archbishop (Personal Title) of Pozzuoli, Italy | Bishop |
| 56.7 | Confirmed | Vincenzo Maria Castro † | Bishop of Umbriatico (Umbriaticum), Italy | Bishop of Castellaneta, Italy |
| 52.6 | Confirmed | Bartolomeo Criscuolo † | Bishop of Lettere (-Gragnano), Italy |
| 62.0 | Confirmed | Filippo d’Ambrogio † | Bishop of Caiazzo, Italy |
| 51.9 | Confirmed | Giovanni Thomas Vincenzo Tiberio d’Anisi, O.A.D. † | Bishop of Gallipoli, Italy |
| 72.5 | Confirmed | Gian Leonardo Maria Di Fusco, O.P. † | Bishop of Acerra, Italy |
| 56.5 | Confirmed | Ferdinando Crispo Doria † | Bishop of Castellammare di Stabia, Italy |
| 52.0 | Confirmed | Carmine Fimiani † | Bishop of Nardò, Italy |
| 63.2 | Confirmed | Gennaro Clemente Francone † | Archbishop (Personal Title) of Gaeta, Italy | Bishop of Troia, Italy |
| 62.0 | Confirmed | Agostino Gervasio, O.E.S.A. † | Archbishop of Capua, Italy |
| 63.4 | Confirmed | Agostino Gregorio Golini † | Bishop of Trevico, Italy |
| 43.2 | Confirmed | Karl Franz von Lodron † | Bishop of Brixen {Bressanone}, Italy |
| 52.8 | Confirmed | Salvatore Maria Lombardi † | Bishop of Andria, Italy |
| 49.2 | Confirmed | Andrea de Lucia † | Bishop of Calvi Risorta, Italy | Bishop of Calvi e Teano, Italy |
| 54.3 | Confirmed | Vincenzo Lupoli † | Bishop of Telese o Cerreto Sannita, Italy |
| 63.9 | Appointed | Simone de Magistris, C.O. † | Titular Bishop of Cyrene |
| 58.1 | Confirmed | Pietro Mancini † | Bishop of Minervino Murge, Italy |
| 49.8 | Confirmed | Giuseppe Marra † | Bishop of Nicotera, Italy |
| 45.4 | Confirmed | Silvestro (Jean Baptiste) Miccù, O.F.M. Obs. † | Bishop of Ravello e Scala, Italy | Archbishop of Amalfi, Italy |
| 47.4 | Confirmed | Gaetano Paolo de Miceli, C.P.O. † | Bishop of Alessano, Italy | Archbishop of Rossano, Italy |
| 62.1 | Confirmed | Ambrogio (Paulo Maria Michael) Mirelli, O.S.B. † | Archbishop of Chieti, Italy |
| 50.8 | Confirmed | Vincenzo Maria Morelli, C.R. † | Archbishop of Otranto, Italy |
| 47.5 | Confirmed | Raffaele Mormile, C.R. † | Archbishop of Cosenza, Italy | Archbishop of Palermo, Italy |
| 70.1 | Confirmed | Emanuele Maria Pignone del Carretto, O.E.S.A. † | Bishop of Sessa Aurunca, Italy |
| 51.4 | Confirmed | Fortunado Pinto † | Bishop of Tricarico, Italy | Archbishop of Salerno (-Acerno), Italy |
| 51.6 | Confirmed | Paolo Pozzuoli † | Bishop of Sant’Agata de’ Goti, Italy |
| 51.2 | Confirmed | Francesco Saverio Saggese † | Bishop of Montepeloso, Italy |
| 51.2 | Confirmed | Antonio Siciliani, C.R.L. † | Bishop of Aquino e Pontecorvo, Italy |
| 64.4 | Appointed | Pasquale Sifanni † | Titular Bishop of Tium |
| 43.8 | Confirmed | Gennaro Maria Guevara Suardo, O.S.B. † | Archbishop of Bari (-Canosa), Italy | Bishop of Aversa, Italy |
| 52.7 | Confirmed | Gennaro Vincenzo Tortora † | Bishop of Fondi (Fundi), Italy |
| 51.9 | Confirmed | Gioacchino Vassetta, O.M.D. † | Bishop of Castellaneta, Italy |
| 43.0 | Confirmed | Nicola Vecchi † | Bishop of Conversano, Italy | Bishop of Teano, Italy |
| 68.6 | Confirmed | Francesco Saverio de Vivo † | Archbishop (Personal Title) of Nusco, Italy | Bishop |
| Mar | 71.5 | Died | Tiberio Borghesi † | Archbishop of Siena, Italy |
| 82.7 | Died | Paolo Da Ponte, O.C.D. † | Bishop of Torcello (Turris), Italy |
| 3 Mar | 22.9 | Ordained Priest | José Maria de Araújo, O.S.H. † | Priest of Orden de San Jerónimo | Bishop of Olinda, Brazil |
| 22.2 | Ordained Deacon | Kajetan von Kowalski † | Deacon of Poznań, Poland | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 24.0 | Ordained Priest | Giuseppe Saitta † | Priest | Bishop of Patti, Italy |
| 4 Mar | 45.7 | Ordained Bishop | Francesco Amoroso † | Archbishop of Lanciano, Italy |
| 59.2 | Ordained Bishop | Giovanni Arcamone, C.R. † | Bishop of Lucera, Italy |
| 61.6 | Ordained Bishop | Giovanni Battista Brancaccio † | Bishop of Ostuni, Italy |
| 56.8 | Ordained Bishop | Vincenzo Maria Castro † | Bishop of Umbriatico (Umbriaticum), Italy | Bishop of Castellaneta, Italy |
| 52.7 | Ordained Bishop | Bartolomeo Criscuolo † | Bishop of Lettere (-Gragnano), Italy |
| 62.1 | Ordained Bishop | Filippo d’Ambrogio † | Bishop of Caiazzo, Italy |
| 51.9 | Ordained Bishop | Giovanni Thomas Vincenzo Tiberio d’Anisi, O.A.D. † | Bishop of Gallipoli, Italy |
| 72.5 | Ordained Bishop | Gian Leonardo Maria Di Fusco, O.P. † | Bishop of Acerra, Italy |
| 56.6 | Ordained Bishop | Ferdinando Crispo Doria † | Bishop of Castellammare di Stabia, Italy |
| 52.0 | Ordained Bishop | Carmine Fimiani † | Bishop of Nardò, Italy |
| 63.5 | Ordained Bishop | Agostino Gregorio Golini † | Bishop of Trevico, Italy |
| 52.8 | Ordained Bishop | Salvatore Maria Lombardi † | Bishop of Andria, Italy |
| 49.2 | Ordained Bishop | Andrea de Lucia † | Bishop of Calvi Risorta, Italy | Bishop of Calvi e Teano, Italy |
| 54.3 | Ordained Bishop | Vincenzo Lupoli † | Bishop of Telese o Cerreto Sannita, Italy |
| 64.0 | Ordained Bishop | Simone de Magistris, C.O. † | Titular Bishop of Cyrene |
| 58.2 | Ordained Bishop | Pietro Mancini † | Bishop of Minervino Murge, Italy |
| 49.9 | Ordained Bishop | Giuseppe Marra † | Bishop of Nicotera, Italy |
| 45.4 | Ordained Bishop | Silvestro (Jean Baptiste) Miccù, O.F.M. Obs. † | Bishop of Ravello e Scala, Italy | Archbishop of Amalfi, Italy |
| 47.4 | Ordained Bishop | Gaetano Paolo de Miceli, C.P.O. † | Bishop of Alessano, Italy | Archbishop of Rossano, Italy |
| 62.1 | Ordained Bishop | Ambrogio (Paulo Maria Michael) Mirelli, O.S.B. † | Archbishop of Chieti, Italy |
| 50.8 | Ordained Bishop | Vincenzo Maria Morelli, C.R. † | Archbishop of Otranto, Italy |
| 47.5 | Ordained Bishop | Raffaele Mormile, C.R. † | Archbishop of Cosenza, Italy | Archbishop of Palermo, Italy |
| 51.4 | Ordained Bishop | Fortunado Pinto † | Bishop of Tricarico, Italy | Archbishop of Salerno (-Acerno), Italy |
| 51.7 | Ordained Bishop | Paolo Pozzuoli † | Bishop of Sant’Agata de’ Goti, Italy |
| 51.2 | Ordained Bishop | Francesco Saverio Saggese † | Bishop of Montepeloso, Italy |
| 51.2 | Ordained Bishop | Antonio Siciliani, C.R.L. † | Bishop of Aquino e Pontecorvo, Italy |
| 43.8 | Ordained Bishop | Gennaro Maria Guevara Suardo, O.S.B. † | Archbishop of Bari (-Canosa), Italy | Bishop of Aversa, Italy |
| 52.7 | Ordained Bishop | Gennaro Vincenzo Tortora † | Bishop of Fondi (Fundi), Italy |
| 51.9 | Ordained Bishop | Gioacchino Vassetta, O.M.D. † | Bishop of Castellaneta, Italy |
| 43.0 | Ordained Bishop | Nicola Vecchi † | Bishop of Conversano, Italy | Bishop of Teano, Italy |
| 25.6 | Ordained Priest | Francesco Antonio Visocchi † | Priest | Bishop of Gallipoli, Italy |
| 11 Mar | 25.5 | Ordained Priest | Maurice-Jean-Madeleine de Broglie † | Priest | Bishop of Gent {Ghent, Gand}, Belgium |
| 72.8 | Died | Miguel de Pamplona González Bassecourt, O.F.M. Cap. † | Bishop Emeritus of Arequipa, Peru |
| 12 Mar | 52.3 | Died | Jean-Baptiste-Auguste de Villoutreix de Faye † | Bishop of Oloron (Oloron-Sainte-Marie), France |
| 15 Mar | 63.4 | Selected | Niccolò Angelo Sagredo † | Archbishop (Personal Title) of Torcello (Turris), Italy | Bishop |
| 17 Mar | 49.9 | Selected | Orazio della Torre † | Bishop of Mazara del Vallo, Italy |
| 18 Mar | 44.7 | Ordained Bishop | [Jean-Baptiste Gratien (Graziani)], C.M. † | Bishop of [Seine-Inférieure (Constitutional), France] |
| 64.5 | Ordained Bishop | Pasquale Sifanni † | Titular Bishop of Tium |
| 19 Mar | 66.6 | Died | Raymond de Durfort † | Archbishop of Besançon, France |
| Born | José María Guerra y Rodríguez Correa † | | Bishop of Yucatán (Mérida), México |
| 70.2 | Ordained Bishop | Emanuele Maria Pignone del Carretto, O.E.S.A. † | Bishop of Sessa Aurunca, Italy |
| 20 Mar | 46.2 | Resigned | Gerard Teahan (Teaghan) † | Archbishop of Cashel (-Emly), Ireland | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| 21 Mar | 59.8 | Died | Ladislaus Luzénszky † | Auxiliary Bishop of Esztergom, Hungary |
| 22 Mar | | Born | Michele Franchini † | | Bishop of Nicotera e Tropea, Italy |
| 23 Mar | 65.8 | Resigned | Giovanni Saverio Pirelli † | Bishop of Sarno, Italy | Bishop of Ariano, Italy |
| 24 Mar | 26.2 | Ordained Priest | Stanislao Mossa † | Priest | Bishop of Ampurias e Civita, Italy |
| 24.5 | Ordained Priest | Carlo Giuseppe Peda, B. † | Priest of Clerics Regular of St. Paul | Bishop of Assisi, Italy |
| 24.0 | Ordained Priest | Giuseppe Saverio Poli † | Priest | Bishop of Anglona-Tursi, Italy |
| Born | Jose Epigmenio Villanueva y Gomez de Eguiarreta † | | Bishop-Elect of Antequera, Oaxaca, México |
| 25 Mar | 43.3 | Ordained Bishop | Karl Franz von Lodron † | Bishop of Brixen {Bressanone}, Italy |
| 23.3 | Ordained Priest | Ambrose Maréchal, P.S.S. † | Priest of Society of Priests of Saint Sulpice | Archbishop of Baltimore, Maryland, USA |
| 26 Mar | 44.7 | Appointed | Angelo Antonio Anselmi † | Bishop of San Severino (Marche), Italy |
| 60.2 | Confirmed | Domenico Arcaroli † | Bishop of Vieste, Italy | Bishop Emeritus |
| 58.3 | Confirmed | Giuseppe Maria Beneventi, O.F.M. Conv. † | Bishop of Muro Lucano, Italy |
| 57.3 | Confirmed | Giuseppe Bertieri, O.A.D. † | Bishop of Pavia, Italy |
| 49.4 | Appointed | Francesco Bugliari † | Titular Bishop of Thagaste |
| 61.1 | Confirmed | Michelangelo Calandrelli, O.E.S.A. † | Bishop of Acerno, Italy |
| 59.5 | Confirmed | Giuseppe Corrado Panzini † | Bishop of Ugento, Italy |
| 58.5 | Confirmed | Antonio Cresi † | Bishop of Ortona a Mare e Campli, Italy |
| 46.8 | Confirmed | Felice Antonio d’Alessandria † | Bishop of Cariati e Cerenzia, Italy |
| 46.1 | Confirmed | Giovanni Gaetano del Muscio, Sch. P. † | Bishop of Carinola (Calina), Italy | Archbishop of Manfredonia, Italy |
| 57.8 | Confirmed | Luca Nicola de Luca † | Bishop of Trivento, Italy | Bishop Emeritus |
| 45.3 | Confirmed | Bernardo Maria della Torre † | Bishop of Marsico Nuovo, Italy | Bishop of Castellammare di Stabia, Italy |
| 63.1 | Confirmed | Sebastiano de Rosa † | Bishop of Avellino e Frigento, Italy |
| 57.8 | Confirmed | Francesco Antonio Duca † | Bishop of Castro di Puglia, Italy |
| 55.8 | Appointed | Nikolaj Ferrich † | Bishop of Trebinje e Mrkan, Bosnia and Herzegovina |
| 58.5 | Confirmed | Gennaro Fortunato † | Bishop of Lavello, Italy |
| 52.5 | Confirmed | Vincenzo Greco † | Bishop of Belcastro, Italy |
| 47.3 | Confirmed | Francesco Antonio Grillo, O.F.M. Conv. † | Bishop of Martirano (Martoranum), Italy | Bishop of Cassano all’Jonio, Italy |
| 51.6 | Confirmed | Francesco Saverio Gualtieri † | Bishop of L’Aquila, Italy | Bishop of Caserta, Italy |
| 71.1 | Confirmed | Donato de’ Liguori † | Bishop of Venafro, Italy |
| 44.9 | Confirmed | Ludovico Ludovici (Ludovico), O.F.M. Obs. † | Bishop of Crotone (Cotrone), Italy | Bishop of Policastro, Italy |
| 45.6 | Confirmed | Giovanni Battista Marchese † | Bishop of Catanzaro, Italy |
| 63.5 | Confirmed | Giuseppe Martini † | Bishop of Bova, Italy |
| 59.3 | Confirmed | Giuseppe Mormile, C.R. † | Titular Archbishop of Nazareth |
| 73.8 | Confirmed | Carlo Nicodemi † | Bishop of Sant’Angelo dei Lombardi e Bisaccia, Italy |
| 61.0 | Confirmed | Salvatore Palica, O.S.B. † | Bishop of Bisceglie, Italy |
| 63.8 | Confirmed | Raffaele Pasca, O.S.B. † | Bishop of Teano, Italy |
| 65.8 | Confirmed | Giovanni Saverio Pirelli † | Bishop of Ariano, Italy |
| 62.2 | Confirmed | Giuseppe Domenico Porqueddu † | Bishop of Iglesias, Italy |
| 70.1 | Confirmed | Lorenzo Potenza † | Bishop of Sarno, Italy |
| 66.9 | Confirmed | Pasquale Sansone † | Bishop of Ischia, Italy |
| 66.2 | Appointed | Luigi (Michael) Spagnoletti, O.F.M. Obs. † | Archbishop of Dubrovnik (Ragusa), Croatia |
| 45.7 | Confirmed | Salvatore Spinelli, O.S.B. † | Bishop of Lecce, Italy | Archbishop of Salerno, Italy |
| 39.1 | Confirmed | Alessandro Tommasini † | Bishop of Oppido Mamertina, Italy | Archbishop of Reggio Calabria, Italy |
| 30 Mar | 47.0 | Installed | Antonio Despuig y Dameto † | Bishop of Orihuela, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |
| 1 Apr | | Born | Giovanni Sabatino (Sabatini) † | | Bishop of Valva e Sulmona, Italy |
| 7 Apr | 27.2 | Ordained Priest | Gaetano Barbaroli † | Priest | Bishop of Policastro, Italy |
| 22.9 | Ordained Priest | Anselmo Basilici † | Priest | Bishop of Nepi e Sutri, Italy |
| 22.7 | Ordained Deacon | József de Belánsky † | Deacon | Bishop of Banská Bystrica, Slovakia |
| 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 e Poznań, Poland |
| 9 Apr | | Born | Vojtech Bartakovics † | | Archbishop of Eger, Hungary |
| 58.3 | Ordained Bishop | Giuseppe Maria Beneventi, O.F.M. Conv. † | Bishop of Muro Lucano, Italy |
| 61.1 | Ordained Bishop | Michelangelo Calandrelli, O.E.S.A. † | Bishop of Acerno, Italy |
| 59.5 | Ordained Bishop | Giuseppe Corrado Panzini † | Bishop of Ugento, Italy |
| 58.6 | Ordained Bishop | Antonio Cresi † | Bishop of Ortona a Mare e Campli, Italy |
| 46.8 | Ordained Bishop | Felice Antonio d’Alessandria † | Bishop of Cariati e Cerenzia, Italy |
| 46.1 | Ordained Bishop | Giovanni Gaetano del Muscio, Sch. P. † | Bishop of Carinola (Calina), Italy | Archbishop of Manfredonia, Italy |
| 45.4 | Ordained Bishop | Bernardo Maria della Torre † | Bishop of Marsico Nuovo, Italy | Bishop of Castellammare di Stabia, Italy |
| 57.8 | Ordained Bishop | Francesco Antonio Duca † | Bishop of Castro di Puglia, Italy |
| 55.9 | Ordained Bishop | Nikolaj Ferrich † | Bishop of Trebinje e Mrkan, Bosnia and Herzegovina |
| 58.5 | Ordained Bishop | Gennaro Fortunato † | Bishop of Lavello, Italy |
| 52.5 | Ordained Bishop | Vincenzo Greco † | Bishop of Belcastro, Italy |
| 47.4 | Ordained Bishop | Francesco Antonio Grillo, O.F.M. Conv. † | Bishop of Martirano (Martoranum), Italy | Bishop of Cassano all’Jonio, Italy |
| 51.7 | Ordained Bishop | Francesco Saverio Gualtieri † | Bishop of L’Aquila, Italy | Bishop of Caserta, Italy |
| 71.1 | Ordained Bishop | Donato de’ Liguori † | Bishop of Venafro, Italy |
| 44.9 | Ordained Bishop | Ludovico Ludovici (Ludovico), O.F.M. Obs. † | Bishop of Crotone (Cotrone), Italy | Bishop of Policastro, Italy |
| 63.5 | Ordained Bishop | Giuseppe Martini † | Bishop of Bova, Italy |
| 59.3 | Ordained Bishop | Giuseppe Mormile, C.R. † | Titular Archbishop of Nazareth |
| 61.0 | Ordained Bishop | Salvatore Palica, O.S.B. † | Bishop of Bisceglie, Italy |
| 63.8 | Ordained Bishop | Raffaele Pasca, O.S.B. † | Bishop of Teano, Italy |
| 66.9 | Ordained Bishop | Pasquale Sansone † | Bishop of Ischia, Italy |
| 66.3 | Ordained Bishop | Luigi (Michael) Spagnoletti, O.F.M. Obs. † | Archbishop of Dubrovnik (Ragusa), Croatia |
| 10 Apr | 49.4 | Ordained Bishop | Francesco Bugliari † | Titular Bishop of Thagaste |
| 45.7 | Ordained Bishop | Giovanni Battista Marchese † | Bishop of Catanzaro, Italy |
| 39.1 | Ordained Bishop | Alessandro Tommasini † | Bishop of Oppido Mamertina, Italy | Archbishop of Reggio Calabria, Italy |
| 11 Apr | 62.2 | Appointed | Manuel Abad y Lasierra, O.S.B. † | Titular Archbishop of Selymbria | Bishop Emeritus of Astorga, Spain |
| 14 Apr | 74.8 | Died | Paolino Pace † | Bishop of Vico Equense, Italy |
| 16 Apr | | Born | Filippo de Angelis † | | Cardinal, Archbishop of Fermo, Italy |
| 21 Apr | | Born | Lorenzo Pontillo † | | Archbishop of Cosenza, Italy |
| 22 Apr | | Ordained Bishop | Adrian Butrymowicz, O.S.B.M. † | Titular Bishop of Calama | Auxiliary Bishop of Brėst (Ukrainian) |
| 23.6 | Ordained Deacon | Hugues-Robert-Jean-Charles de la Tour d’Auvergne-Lauraquais † | Deacon | Cardinal, Bishop of Arras, France |
| 71.2 | Died | João Teixeira de Carvalho † | Bishop of Elvas, Portugal |
| 24 Apr | 45.8 | Appointed | Jean-Siffrein Maury † | Titular Archbishop of Nicaea | Cardinal, Bishop Emeritus of Corneto (Tarquinia) e Montefiascone, Italy |
| 29 Apr | 43.7 | Ordained Bishop | Luiz de Brito Homem † | Bishop of Angola e Congo | Bishop of São Luís do Maranhão, Brazil |
| 52.9 | Ordained Bishop | Miguel Antonio da Cruz, O.F.M. Disc. † | Bishop of São Paulo, Brazil | Archbishop of Braga, Portugal |
| 53.5 | Ordained Bishop | Francisco Monteiro Pereira de Azevedo † | Bishop of Viseu, Portugal |
| 46.7 | Ordained Bishop | Michal Pałucki † | Titular Bishop of Adraa | Auxiliary Bishop of Kyiv and Chernihiv (Kijów and Czernihow), Ukraine |