| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 39.0 | Appointed | Basile Mansur Asmar † | Archbishop of Diarbekir (Amida) (Chaldean), Turkey | Archbishop Emeritus of Gazireh (Gezira) (Chaldean), Turkey |
| 17.3 | Professed | Manuel de Santa Rita Barros, T.O.R. † | Member of Third Order Regular of St. Francis of Penance | Bishop of Angola e Congo, Angola |
| 73.7 | Appointed | Francesco Bertazzoli † | Cardinal, Prefect of the Congregation for Studies |
| 23.7 | Ordained Priest | Alfonso Maria Cappetta (Cappelta) † | Priest | Bishop of Gravina e Irsina, Italy |
| 71.5 | Ordained Bishop | Fernando Caicedo y Flores † | Archbishop of Santafé en Nueva Granada, Colombia |
| Died | Ignace Flavianos Dahan, B.C. † | Archbishop of Beirut {Bairut} (Melkite Greek), Lebanon |
| 21.8 | Professed | François-Xavier Danicourt, C.M. † | Member of Congregation of the Mission | Vicar Apostolic of Chekiang {Ce-Kiam}, China |
| 28.6 | Ordained Priest | José Antonio de la Peńa y Navarro † | Priest | Bishop of Zamora, Michoacán, México |
| 26.0 | Converted | Iacobus Eliani † | Archbishop of Damas (Syrian), Syria |
| 23.0 | Ordained Priest | Patrick Fallon † | Priest | Bishop of Kilmacduagh, Ireland |
| 78.0 | Resigned | Adrijan Holovnja (Holownia), O.S.B.M. † | Auxiliary Bishop of Minsk, Belarus | Auxiliary Bishop Emeritus |
| 22.7 | Ordained Priest | William Keane † | Priest of Cloyne, Ireland | Bishop |
| 63.4 | Died | Bartholomeu de Martyribus Maya, O.C.D. † | Prelate of Mozambico, Mozambique |
| 28.0 | Ordained Priest | Francis George Mostyn † | Priest | Vicar Apostolic of Northern District, England, Great Britain |
| 24.1 | Ordained Priest | Francis Joseph Nicholson, O.C.D. † | Priest of Order of Discalced Carmelites | Archbishop of Corfů, Greece |
| 23.2 | Ordained Priest | William Walsh † | Priest | Archbishop of Halifax, Nova Scotia, Canada |
| 57.2 | Appointed | James Whitfield † | Apostolic Administrator of Richmond, Virginia, USA | Archbishop of Baltimore, Maryland, USA |
| 1 Jan | | Born | Richard Phelan † | Ballyragget, Ireland | Bishop of Pittsburgh, Pennsylvania, USA |
| 2 Jan | 51.4 | Died | Manuel Bernardo Morete Bodelón † | Bishop of Astorga, Spain |
| 4 Jan | 79.5 | Died | László Köszeghy von Romete † | Bishop of Csanád, Hungary |
| 8 Jan | 23.0 | Ordained Priest | William Delany † | Priest of Cork, Ireland | Bishop |
| 57.2 | Appointed | James Whitfield † | Coadjutor Archbishop of Baltimore, Maryland, USA | Archbishop |
| 57.2 | Appointed | James Whitfield † | Titular Archbishop of Apollonia | Archbishop of Baltimore, Maryland, USA |
| 10 Jan | | Born | Bernard Hermann Koeckemann, SS.CC. † | Ostbeven, Germany | Vicar Apostolic of Sandwich Islands, Hawaii, USA |
| Born | James David Ricards † | Wexford, Ireland | Vicar Apostolic of Cape of Good Hope, Eastern District {Capo de Buona Speranza, Distretto Orientale}, South Africa |
| 12 Jan | | Born | John Claude Neraz † | Anse, France | Bishop of San Antonio, Texas, USA |
| 14 Jan | 23.4 | Ordained Priest | Raffaele Bachetoni † | Priest | Bishop Emeritus of Norcia, Italy |
| 74.3 | Died | André-Etienne-Antoine de Morlhon † | Archbishop of Auch, France |
| 18 Jan | | Born | Pierre-Jean-Joseph Soubiranne † | Céret, France | Bishop Emeritus of Belley, France |
| 21 Jan | | Born | Alessio Maria Biffoli, O.S.M. † | Roma | Bishop of Fossombrone, Italy |
| Born | Henryk Piotr Kossowski † | Varsavia | Auxiliary Bishop Emeritus of Włocławek (Kujawy, Kalisze), Poland |
| 23.6 | Professed | Bernardo (Philip) Pontanova, O.C.D. † | Member of Order of Discalced Carmelites | Titular Bishop of Tanis |
| 24 Jan | | Born | Dominique Racine † | St.-Ambroise, Jeune-Lorette | Bishop of Chicoutimi, Québec, Canada |
| 27 Jan | | Born | Ignazio Bartoli † | Castelfidardo | Bishop of Senigallia, Italy |
| 28 Jan | 77.4 | Appointed | Giuseppe Andrea Albani † | Cardinal-Deacon of Santa Maria in Via Lata | Cardinal, Librarian of the Vatican Library |
| 62.6 | Confirmed | Emanuele Maria Bellorado, O.P. † | Archbishop of Reggio Calabria, Italy | Bishop of Sant’Agata de’ Goti, Italy |
| 66.6 | Appointed | Francesco di Paola Berretta † | Auxiliary Bishop of Catania, Italy |
| 66.6 | Appointed | Francesco di Paola Berretta † | Titular Bishop of Hippo Diarrhytus | Auxiliary Bishop of Catania, Italy |
| 54.5 | Confirmed | Giovanni Maria Bua † | Archbishop of Oristano, Italy |
| 59.4 | Appointed | Joseph Vitus Burg † | Auxiliary Bishop of Freiburg im Breisgau, Germany | Bishop of Mainz, Germany |
| 59.4 | Appointed | Joseph Vitus Burg † | Titular Bishop of Rhodiapolis | Bishop of Mainz, Germany |
| 41.1 | Confirmed | Estevam a Jesu Maria da Costa, O.F.M. † | Bishop of Angra, Portugal |
| 63.5 | Appointed | Francesco-Paolo Grifi † | Auxiliary Bishop of Acerenza e Matera, Italy |
| 63.5 | Appointed | Francesco-Paolo Grifi † | Titular Bishop of Arsinoë in Arcadia | Auxiliary Bishop of Acerenza e Matera, Italy |
| 47.1 | Confirmed | János Hám † | Bishop of Satu Mare {Szatmár}, Romania |
| 51.1 | Confirmed | Ignatius Petrus Jarweh (Jaroue) † | Patriarch of Antiochia {Antioch} (Syrian), Lebanon |
| 51.1 | Confirmed | Ignatius Petrus Jarweh (Jaroue) † | Bishop of Beirut {Bairut} (Syrian), Lebanon | Patriarch of Antiochia {Antioch} (Syrian), Lebanon |
| 53.7 | Appointed | Johann Baptist Judas Thaddeus von Keller † | Bishop of Rottenburg, Germany |
| 59.0 | Confirmed | Niccola Kováts de Csil-Tusnad † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 61.8 | Confirmed | Antoine Martinet † | Archbishop of Chambéry, France |
| 68.0 | Confirmed | Angelico Méstria, O.F.M. Cap. † | Bishop of Ugento, Italy |
| 46.0 | Appointed | Ferdinando Minucci † | Archbishop of Firenze {Florence}, Italy |
| 47.7 | Appointed | Giovanni Tommaso Neuschel † | Titular Bishop of Troas | Bishop Emeritus of Parma, Italy |
| 48.1 | Appointed | Giovanni Battista Parretti † | Bishop of Fiesole, Italy | Archbishop of Pisa, Italy |
| 37.5 | Confirmed | Stefano Pavlovic-Lucic † | Bishop of Kotor (Cattaro), Montenegro |
| 55.6 | Confirmed | Antonio Podestá † | Bishop of Saluzzo, Italy |
| 65.6 | Confirmed | Antoine Rochaix † | Bishop of Tarentaise, France |
| 59.6 | Appointed | Etienne Blanquet de Rouville † | Auxiliary Bishop of Reims, France |
| 59.6 | Appointed | Etienne Blanquet de Rouville † | Titular Bishop of Numida | Auxiliary Bishop of Reims, France |
| 42.2 | Confirmed | János Keresztély Scitovszky † | Bishop of Rožňava, Slovakia | Cardinal, Archbishop of Esztergom, Hungary |
| 47.5 | Confirmed | Ignác Szepesy de Négyes † | Bishop of Pécs, Hungary |
| 61.0 | Confirmed | Pál Mátyás Szutsits † | Bishop of Székesfehérvár (Albareale), Hungary | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 46.1 | Confirmed | Antonio Raimondo Tore † | Bishop of Ales e Terralba, Italy | Archbishop of Cagliari, Italy |
| 56.4 | Confirmed | José Uraga Pérez † | Bishop of Guadix, Spain |
| 74.6 | Appointed | Jan Pavel Woronicz † | Archbishop of Warszawa {Warsaw}, Poland |
| 29 Jan | 52.2 | Resigned | Antonio-Maria Casabianca † | Bishop of Galtelli-Nuoro (Galtelly Nori), Italy | Bishop Emeritus |
| 59.1 | Died | Ambrose Maréchal, P.S.S. † | Archbishop of Baltimore, Maryland, USA |
| 57.2 | Succeeded | James Whitfield † | Archbishop of Baltimore, Maryland, USA |
| 31 Jan | 60.4 | Died | Francisco Chacim (Chachim), O.F.M. † | Bishop of Macau, China |
| 3 Feb | 68.0 | Ordained Bishop | Angelico Méstria, O.F.M. Cap. † | Bishop of Ugento, Italy |
| 46.0 | Ordained Bishop | Ferdinando Minucci † | Archbishop of Firenze {Florence}, Italy |
| 48.1 | Ordained Bishop | Giovanni Battista Parretti † | Bishop of Fiesole, Italy | Archbishop of Pisa, Italy |
| 5 Feb | 36.0 | Appointed | Barthélemy Bruguičre, M.E.P. † | Coadjutor Vicar Apostolic of Siam, Thailand | Vicar Apostolic of Corea |
| 36.0 | Appointed | Barthélemy Bruguičre, M.E.P. † | Titular Bishop of Capsus | Vicar Apostolic of Corea |
| 42.9 | Appointed | Carlo Odescalchi, S.J. † | Prefect of the Congregation of Bishops and Regulars | Priest of Society of Jesus |
| Born | Marie-Ludovic Roche † | Serričres | Bishop of Gap, France |
| 6 Feb | 72.3 | Died | Francesco Serlupi-Crescenzi † | Cardinal, Cardinal-Priest of Santa Prassede |
| 7 Feb | 80.5 | Died | Alexander Cameron † | Vicar Apostolic Emeritus of Lowland District, Scotland, Great Britain |
| Born | Adolphe-Louis-Albert Perraud, C.O. † | Lyon | Cardinal, Bishop of Autun (-Châlon-sur-Saône-Mâcon), France |
| 12 Feb | | Born | Enrico de Dominis (Dominicis) † | Avellino | Archbishop of Amalfi, Italy |
| 13 Feb | | Born | Antonio Sbrolli † | Piancastagnaio | Bishop Emeritus of Sovana e Pitigliano, Italy |
| 14 Feb | | Born | Thomas-Marie Gentili, O.P. † | Chieti, Italy | Coadjutor Vicar Apostolic Emeritus of Fo-Kien, China |
| 15 Feb | 45.2 | Selected | Giuseppe Grasser † | Bishop of Verona, Italy |
| 17 Feb | 49.1 | Ordained Bishop | José María Estévez † | Bishop of Santa Marta, Colombia |
| 18 Feb | 53.1 | Ordained Bishop | Ramón Ignacio Méndez † | Archbishop of Caracas, Santiago de Venezuela |
| 28.1 | Ordained Deacon | Motiejus Wołonczewscki † | Deacon | Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 29 Feb | 23.1 | Ordained Deacon | José Affonso de Moraes Torres, C.M. † | Deacon of Congregation of the Mission | Bishop Emeritus of Belém do Pará, Brazil |
| 1 Mar | 23.1 | Ordained Priest | José Affonso de Moraes Torres, C.M. † | Priest of Congregation of the Mission | Bishop Emeritus of Belém do Pará, Brazil |
| 2 Mar | 82.9 | Died | Guillaume-Balthasar Cousin de Grainville † | Bishop of Cahors, France |
| 47.8 | Ordained Bishop | Giovanni Tommaso Neuschel † | Titular Bishop of Troas | Bishop Emeritus of Parma, Italy |
| 55.7 | Ordained Bishop | Antonio Podestá † | Bishop of Saluzzo, Italy |
| 3 Mar | | Born | Francesco Pozzi, P.I.M.E. † | Milano, Italy | Bishop of Krishnagar, India |
| 5 Mar | | Born | Gennaro de Vivo † | Napoli | Bishop of Pozzuoli, Italy |
| 6 Mar | 77.5 | Died | Domenico Fendale † | Bishop of Crotone (Cotrone), Italy |
| 7 Mar | | Born | Salvatore Nappi † | Nola | Archbishop Emeritus of Conza e Campagna, Italy |
| 8 Mar | | Born | Salvatore Gaffiero † | Senglea | Auxiliary Bishop of Malta |
| 11 Mar | | Born | Giustino Puletti † | San Giustino | Bishop of Sansepolcro (Borgo San Sepolcro), Italy |
| 12 Mar | 58.8 | Died | Gregorio Rodríguez Carrillo, O.S.Bas. † | Bishop of Cartagena, Colombia |
| 16 Mar | 78.3 | Died | Felice Bezzi † | Bishop of Pesaro, Italy |
| 47.2 | Ordained Bishop | János Hám † | Bishop of Satu Mare {Szatmár}, Romania |
| 59.7 | Ordained Bishop | Etienne Blanquet de Rouville † | Titular Bishop of Numida | Auxiliary Bishop of Reims, France |
| 17 Mar | 43.4 | Succeeded | John Ryan † | Bishop of Limerick, Ireland |
| 26.4 | Converted | Ignace Antony Samhiri † | Patriarch of Antiochia {Antioch} (Syrian), Lebanon |
| 74.2 | Died | Charles Tuohy † | Bishop of Limerick, Ireland |
| 21 Mar | 37.4 | Appointed | Joseph-Marie-Pélagie Havard, M.E.P. † | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam | Vicar Apostolic |
| 37.4 | Appointed | Joseph-Marie-Pélagie Havard, M.E.P. † | Titular Bishop of Castoria | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| Born | Benito Sanz y Forés † | Gandía | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| 22 Mar | 23.4 | Ordained Priest | Girolamo dei Conti Verzeri † | Priest | Bishop of Brescia, Italy |
| 23 Mar | 63.6 | Selected | Paul Louis Joseph D’Hautpoul † | Bishop of Cahors, France | Bishop Emeritus |
| Ordained Bishop | Mariano Garnica y Orjuela, O.P. † | Bishop of Antioquía, Colombia |
| 40.1 | Selected | Louis-François-Auguste de Rohan-Chabot † | Archbishop of Auch, France | Cardinal, Archbishop of Besançon, France |
| 61.2 | Ordained Bishop | Pál Mátyás Szutsits † | Bishop of Székesfehérvár (Albareale), Hungary | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 25 Mar | 59.2 | Ordained Bishop | Niccola Kováts de Csil-Tusnad † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| Born | James Murray † | Wicklow, Ireland | Bishop of Maitland, Australia |
| 42.4 | Ordained Bishop | János Keresztély Scitovszky † | Bishop of Rožňava, Slovakia | Cardinal, Archbishop of Esztergom, Hungary |
| 26 Mar | 58.1 | Died | James Buckley † | Vicar Apostolic of Trinidad, Trinidad and Tobago, Antilles |
| Born | Józef Cybichowski † | Objezierze | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 27 Mar | 73.8 | Died | Paul-Ambroise Frčre de Villefrancon † | Archbishop of Besançon, France |
| 3 Apr | | Born | Ambrose Notyn Darauni † | Daraun | Titular Archbishop of Adana |
| 4 Apr | 60.4 | Died | Carlos de Săo José de Azevedo e Sousa, O.F.M. † | Bishop of Guarda, Portugal |
| 6 Apr | | Died | Augustin Hindi † | Archbishop of Diarbekir (Amida) (Chaldean), Turkey |
| 7 Apr | 68.5 | Died | Ferdynand Ciechanowski, O.S.B.M. † | Bishop of Chełm (Ruthenian), Poland |
| 65.8 | Ordained Bishop | Antoine Rochaix † | Bishop of Tarentaise, France |
| 13 Apr | 66.8 | Ordained Bishop | Francesco di Paola Berretta † | Titular Bishop of Hippo Diarrhytus | Auxiliary Bishop of Catania, Italy |
| Born | Giovanni Nepomuceno Glavina † | Boršt | Bishop Emeritus of Trieste e Capodistria (Koper), Italy |
| 14 Apr | 70.2 | Died | Nicola Coppola, C.O. † | Bishop of Nola, Italy |
| 18 Apr | 74.1 | Selected | Juan Nepomuceno de Lera y Cano † | Bishop of Segovia, Spain |
| 19 Apr | 59.8 | Confirmed | Georg Mayer † | Bishop of Gurk, Austria |
| 20 Apr | 87.5 | Died | Carlo Francesco Maria Caselli, O.S.M. † | Cardinal, Bishop of Parma, Italy |
| 24.3 | Ordained Deacon | Mariano Fernández de Córdoba † | Deacon | Bishop of La Paz, Bolivia |
| 59.8 | Ordained Bishop | Georg Mayer † | Bishop of Gurk, Austria |
| 41.3 | Confirmed | Agapios Riachi (Riecji) † | Archbishop of Beirut {Bairut} (Melkite Greek), Lebanon |
| 21 Apr | 66.7 | Selected | Giuseppe Maria Botticelli, O.F.M. † | Bishop of Lacedonia, Italy |
| 23 Apr | 61.1 | Died | Tommaso Ronna † | Bishop of Crema, Italy |
| 25 Apr | | Born | Francis McNeirny † | New York | Bishop of Albany, New York, USA |
| 27 Apr | 24.3 | Ordained Priest | Mariano Fernández de Córdoba † | Priest | Bishop of La Paz, Bolivia |
| 28 Apr | 70.4 | Selected | Juan Francisco Martínez y Castrillón † | Bishop of Málaga, Spain |