| Date | Age | Event | Bishop | Title | Current Title | 
| unknown |  | Ordained Bishop | Gregoire Abdul-Messih † | Bishop | Archbishop of Homs (-Hama-Nabk) (Syrian), Syria | 
| 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 | 
| 69.7 | Appointed | Jozafat Bułhak, O.S.B.M. † | Bishop of Žyrovyci (Ukrainian), Lithuania | Archbishop of Kyiv-Halyč {Kiev} (Ukrainian), Ukraine | 
| 23.7 | Ordained Priest | Alfonso Maria Cappetta (Cappelta) † | Priest | Bishop of Gravina e Irsina (Montepeloso), Italy | 
 | Born | Michael Comerford † |  | Coadjutor Bishop of Kildare and Leighlin, Ireland | 
 | Died | Ignace Flavianos Dahan, B.C. † | Archbishop of Beirut {Bairut} (Melkite Greek), Lebanon | 
| 28.5 | Ordained Priest | José Antonio de la Peńa y Navarro † | Priest | Bishop of Zamora, Michoacán, México | 
| 23.0 | Ordained Priest | Patrick Fallon † | Priest | Bishop of Kilmacduagh, Ireland | 
 | Born | Gaspar Fernández, O.P. † |  | Coadjutor Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viet Nam | 
| 77.7 | Appointed | Adrijan Holovnja (Hołownia), O.S.B.M. † | Auxiliary Bishop of Žyrovyci (Ukrainian), Lithuania | 
| 63.3 | Appointed | Lev (Leon) Javorskyj (Jaworowski), O.S.B.M. † | Auxiliary Bishop of Žyrovyci (Ukrainian), Lithuania | 
| 63.3 | Died | Bartholomeu de Martyribus Maya, O.C.D. † | Prelate of Mozambico | 
| 24.0 | Ordained Priest | Francis Joseph Nicholson, O.C.D. † | Priest of Order of Discalced Carmelites | Archbishop of Corfů, Greece | 
| 48.9 | Resigned | John-Louis Pastre † | Prefect of Bourbon, Réunion | Prefect Emeritus | 
 | Resigned | Wincenty Siedlecki † | Auxiliary Bishop of Chełm and Bełz (Ukrainian), Poland | Auxiliary Bishop Emeritus | 
| 59.0 | Appointed | Kyrylo Syrotynskyj † | Auxiliary Bishop of Žyrovyci (Ukrainian), Lithuania | 
| 23.1 | Ordained Priest | William Walsh † | Priest | Archbishop of Halifax, Nova Scotia, Canada | 
| 57.1 | Appointed | James Whitfield † | Apostolic Administrator of Richmond, Virginia, USA | Archbishop of Baltimore, Maryland, USA | 
| 1 Jan |  | Born | Richard Phelan † |  | Bishop of Pittsburgh, Pennsylvania, USA | 
| 2 Jan | 51.3 | 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 | 
| 57.1 | Appointed | James Whitfield † | Coadjutor Archbishop of Baltimore, Maryland, USA | Archbishop | 
| 57.1 | Appointed | James Whitfield † | Titular Archbishop of Apollonia | Archbishop of Baltimore, Maryland, USA | 
| 10 Jan |  | Born | Bernard Hermann Koeckemann, SS.CC. † |  | Vicar Apostolic of Hawaiian Islands, USA | 
 | Born | James David Ricards † |  | Vicar Apostolic of Cape of Good Hope, Eastern District {Capo de Buona Speranza, Distretto Orientale}, South Africa | 
| 12 Jan |  | Born | John Claude Neraz † |  | Bishop of San Antonio, Texas, USA | 
| 14 Jan | 23.4 | Ordained Priest | Raffaele Bachetoni † | Priest of Spoleto, Italy | Bishop Emeritus of Norcia, Italy | 
| 74.2 | Died | André-Etienne-Antoine de Morlhon † | Archbishop of Auch, France | 
| 18 Jan |  | Born | Pierre-Jean-Joseph Soubiranne † |  | Bishop Emeritus of Belley, France | 
| 21 Jan |  | Born | Alessio Maria Biffoli, O.S.M. † |  | Bishop of Fossombrone, Italy | 
 | Born | Henryk Piotr Kossowski † |  | Auxiliary Bishop Emeritus of Włocławek (Kujawy, Kalisze), Poland | 
| 23.5 | Professed | Bernardo of St. Agnes (Philip) Pontanova, O.C.D. † | Member of Order of Discalced Carmelites | Titular Bishop of Tanis | 
| 24 Jan |  | Born | Dominique Racine † |  | Bishop of Chicoutimi, Québec, Canada | 
| 27 Jan |  | Born | Ignazio Bartoli † |  | Bishop of Senigallia, Italy | 
| 28 Jan | 77.3 | Appointed | Giuseppe Andrea Albani † | Cardinal-Deacon of Santa Maria in Via Lata | Cardinal, Librarian of the Vatican Library | 
| 62.5 | 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 | 
| 41.0 | Confirmed | Estevam a Jesu Maria da Costa, O.F.M. Ref. † | Bishop of Angra, Portugal | 
| 63.4 | Appointed | Francesco-Paolo Grifi † | Auxiliary Bishop of Acerenza e Matera, Italy | 
| 63.4 | Appointed | Francesco-Paolo Grifi † | Titular Bishop of Arsinoë in Arcadia | Auxiliary Bishop of Acerenza e Matera, Italy | 
| 47.0 | Confirmed | János Hám † | Bishop of Satu Mare {Szatmár}, Romania | 
| 51.0 | Confirmed | Ignace Pierre Jarweh (Jaroue, Djarwé) † | Patriarch of Antiochia {Antioch} (Syrian), Lebanon | 
| 51.0 | Confirmed | Ignace Pierre Jarweh (Jaroue, Djarwé) † | Bishop of Beirut {Bairut} (Syrian), Lebanon | Patriarch of Antiochia {Antioch} (Syrian), Lebanon | 
| 53.6 | 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 | 
| 61.7 | Confirmed | Antoine Martinet † | Archbishop of Chambéry, France | 
| 67.9 | Confirmed | Angelico Lorenzo Nicolas Méstria, O.F.M. Cap. † | Bishop of Ugento, Italy | 
| 46.0 | Appointed | Ferdinando Minucci † | Archbishop of Firenze {Florence}, Italy | 
| 47.6 | 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 | 
| 37.4 | Confirmed | Stjepan Pavlović-Lučić † | 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 | 
| 47.4 | Confirmed | Ignác Szepesy de Négyes † | Bishop of Pécs, Hungary | 
| 61.0 | Confirmed | Pál Mátyás (Matija Pavao) Szutsits (Sučić) † | 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 | 
| 74.5 | 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 | 60.3 | Died | Francisco Chacim (Chachim), O.F.M. Disc. † | Bishop of Macau, China | 
| Feb | 63.5 | Ordained Bishop | Francesco-Paolo Grifi † | Titular Bishop of Arsinoë in Arcadia | Auxiliary Bishop of Acerenza e Matera, Italy | 
| 3 Feb | 67.9 | Ordained Bishop | Angelico Lorenzo Nicolas 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 | 35.9 | Appointed | Barthélemy Bruguičre, M.E.P. † | Coadjutor Vicar Apostolic of Siam, Thailand | Vicar Apostolic of Corea | 
| 35.9 | 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 † |  | Bishop of Gap, France | 
| 6 Feb | 72.2 | Died | Francesco Serlupi † | 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. † |  | Cardinal, Bishop of Autun (-Châlon-sur-Saône-Mâcon), France | 
| 12 Feb |  | Born | Enrico de Dominis (Dominicis) † |  | Archbishop of Amalfi, Italy | 
| 13 Feb |  | Born | Antonio Sbrolli † |  | Bishop Emeritus of Sovana e Pitigliano, Italy | 
| 14 Feb |  | Born | Thomas-Marie Gentili, O.P. † |  | Coadjutor Vicar Apostolic Emeritus of Fo-Kien, China | 
| 15 Feb | 45.1 | Selected | Giuseppe Grasser † | Bishop of Verona, Italy | 
| 17 Feb | 48.1 | Ordained Bishop | José María Estévez † | Bishop of Santa Marta, Colombia | 
| 18 Feb | 67.1 | 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 | 23.0 | Ordained Deacon | José Affonso de Moraes Torres, C.M. † | Deacon of Congregation of the Mission | Bishop Emeritus of Belém do Pará, Brazil | 
| 1 Mar | 24.4 | Ordained Priest | Miguel García Cuesta † | Priest of Salamanca, Spain | Cardinal, Archbishop of Santiago de Compostela, Spain | 
| 23.1 | Ordained Priest | José Affonso de Moraes Torres, C.M. † | Priest of Congregation of the Mission | Bishop Emeritus of Belém do Pará, Brazil | 
| 28.1 | Ordained Priest | Francis George Mostyn † | Priest of Midland District, England, Great Britain | Vicar Apostolic of Northern District, England, Great Britain | 
| 2 Mar | 82.9 | Died | Guillaume-Balthasar Cousin de Grainville † | Bishop of Cahors, France | 
| 47.7 | 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 | 68.6 | Appointed | Ercole Dandini † | Cardinal, Prefect of the Roman Curia - Other | 
 | Born | Francesco Pozzi, P.I.M.E. † |  | Bishop of Krishnagar, India | 
| 5 Mar |  | Born | Gennaro de Vivo † |  | Bishop of Pozzuoli, Italy | 
| 6 Mar | 77.4 | Died | Domenico Fendale † | Bishop of Crotone (Cotrone), Italy | 
| 7 Mar |  | Born | Salvatore Nappi † |  | Archbishop Emeritus of Conza e Campagna, Italy | 
| 8 Mar |  | Born | Salvatore Gaffiero † |  | Auxiliary Bishop of Malta | 
| 11 Mar |  | Born | Giustino Puletti † |  | Bishop of Sansepolcro (Borgo San Sepolcro), Italy | 
| 12 Mar | 58.8 | Died | Gregorio Rodríguez Carrillo, O.S.Bas. † | Bishop of Cartagena, Colombia | 
| 16 Mar | 78.2 | Died | Felice Bezzi † | Bishop of Pesaro, Italy | 
| 47.1 | 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 | 43.3 | Succeeded | John Ryan † | Bishop of Limerick, Ireland | 
| 74.2 | Died | Charles Tuohy † | Bishop of Limerick, Ireland | 
| 19 Mar | 71.6 | Ordained Bishop | Fernando Caicedo y Flores † | Archbishop of Santafé en Nueva Granada, Colombia | 
| 21 Mar | 37.3 | Appointed | Joseph-Marie-Pélagie Havard, M.E.P. † | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam | Vicar Apostolic | 
| 37.3 | 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 † |  | Cardinal, Archbishop of Sevilla {Seville}, Spain | 
| 22 Mar | 23.4 | Ordained Priest | Girolamo Verzeri † | Priest | Bishop of Brescia, Italy | 
| 23 Mar | 63.6 | Selected | Paul Louis Joseph D’Hautpoul † | Bishop of Cahors, France | Bishop Emeritus | 
| 58.2 | Ordained Bishop | Mariano Garnica y Orjuela, O.P. † | Bishop of Antioquía, Colombia | 
| 40.0 | Selected | Louis-François-Auguste de Rohan Chabot † | Archbishop of Auch, France | Cardinal, Archbishop of Besançon, France | 
| 61.1 | Ordained Bishop | Pál Mátyás (Matija Pavao) Szutsits (Sučić) † | Bishop of Székesfehérvár (Albareale), Hungary | Bishop of Bosna (Djakovo) et Srijem, Croatia | 
| 25 Mar | 59.1 | Ordained Bishop | Niccola Kováts de Csil-Tusnad † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania | 
 | Born | James Murray † |  | Bishop of Maitland, Australia | 
| 42.3 | Ordained Bishop | János Keresztély Scitovszky † | Bishop of Rožňava, Slovakia | Cardinal, Archbishop of Esztergom, Hungary | 
| 26 Mar | 15.1 | Entered | Giuseppe Aggarbati, O.S.A. † | Member of Order of St. Augustine | Bishop Emeritus of Senigallia, Italy | 
| 58.0 | Died | James Buckley † | Vicar Apostolic of Trinidad, Trinidad and Tobago, Antilles | 
 | Born | Józef Cybichowski † |  | Auxiliary Bishop of Gniezno e Poznań, Poland | 
 | Born | Ambroise Emonet, C.S.Sp. † |  | Superior General of Congregation of the Holy Spirit | 
| 27 Mar | 73.7 | Died | Paul-Ambroise Frčre de Villefrancon † | Archbishop of Besançon, France | 
| 3 Apr |  | Born | Ambrose Notyn Darauni † |  | Titular Archbishop of Adana | 
| 5 Apr | 60.4 | Died | Carlos de Săo José de Azevedo e Sousa, O.F.M. Obs. † | Bishop of Guarda, Portugal | 
| 6 Apr |  | Died | Augustin Hindi † | Archbishop of Diarbekir (Amida) (Chaldean), Turkey | 
| 7 Apr | 68.4 | Died | Ferdynand Ciechanowski, O.S.B.M. † | Bishop of Chełm and Bełz (Ukrainian), 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 † |  | Bishop Emeritus of Trieste e Capodistria (Trst i 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 | 59.7 | Confirmed | Georg Mayer † | Bishop of Gurk, Austria | 
| 20 Apr | 87.5 | Died | Carlo Francesco Maria Caselli, O.S.M. † | Cardinal, Bishop of Parma, Italy | 
| 24.2 | Ordained Deacon | Mariano Fernández de Córdoba † | Deacon of La Paz, Bolivia | Bishop | 
| 59.7 | 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.M. † | Bishop of Lacedonia, Italy | 
| 23 Apr | 61.1 | Died | Tommaso Ronna † | Bishop of Crema, Italy | 
| 25 Apr |  | Born | Francis McNeirny † |  | Bishop of Albany, New York, USA | 
| 27 Apr | 24.3 | Ordained Priest | Mariano Fernández de Córdoba † | Priest of La Paz, Bolivia | Bishop | 
| 28 Apr | 70.4 | Selected | Juan Francisco Martínez y Castrillón † | Bishop of Málaga, Spain |