| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 76.5 | Died | Girolamo Aprile e Benso † | Bishop of Piazza Armerina, Italy |
| 23.9 | Ordained Priest | Francisco de Sales Crespo y Bautista † | Priest of Toledo, Spain | Bishop of Mondoñedo, Spain |
| Born | Ceslaus H. J. Heynen † | | Vicar Apostolic of Curaçao, Netherlands Antilles, Antilles |
| Born | Théophile Antoine Kandaleft (Qandalift) † | Alep | Titular Bishop of Tripoli del Libano dei Siri |
| 30.0 | Professed | François-Napoleon Libois, M.E.P. † | Priest of La Société des Missions Etrangères | Prefect Emeritus of Kouangtong, China |
| 23.3 | Ordained Priest | Jacinto Maria (Nicolaus) Martínez y Sáez, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Bishop of San Cristobal de la Habana, Cuba |
| Born | James O’Reilly † | | Bishop-Elect of Wichita, Kansas, USA |
| 23.6 | Ordained Priest | Juan Bautista de Ormeachea y Ernáez † | Priest | Bishop of Tulancingo, Hidalgo, México |
| 78.2 | Died | Fortunatus Paternò † | Titular Bishop of Orthosias in Caria |
| 17.7 | Professed | Luigi Celestino Spelta, O.F.M. † | Member of Order of Friars Minor | Vicar Apostolic of Hupeh {Hu-Pè}, China |
| 25.3 | Ordained Priest | Jean-Marie Tissot, M.S.F.S. † | Priest of Missionaries of St. Francis de Sales | Bishop of Vizagapatam, India |
| Ordained Bishop | Nicolas Zeia (Zaya) † | Coadjutor Bishop of Salmas {Shahpour} (Chaldean), Iran | Patriarch Emeritus of Babylon {Babilonia} (Chaldean), Iraq |
| Jan | 56.0 | Resigned | Tommaso Bernetti † | Secretary of the Secretariat of State | Cardinal, Secretary Emeritus |
| 1 Jan | | Born | Raffaele Pierotti, O.P. † | Sorbano, Italy | Cardinal, Priest of Order of Friars Preachers |
| 6 Jan | | Born | Stanislaw Kazimierz Ruszkiewicz † | Dzięciołówka | Auxiliary Bishop of Warszawa {Warsaw}, Poland |
| 9 Jan | | Born | François-Xavier Corbet (Corbey), C.S.Sp. † | Hochfelden, France | Vicar Apostolic of Diégo-Suarez, Madagascar |
| 10 Jan | | Born | John Coffey † | Kerry | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| Born | Jesús María Rodríguez Balbín † | Antioquia | Bishop of Antioquía, Colombia |
| 12 Jan | 59.7 | Appointed | Luigi Emmanuele Nicolo Lambruschini, B. † | Secretary of the Secretariat of State | Cardinal, Prefect of the Congregation of Rites |
| 14 Jan | | Born | Joaquim José Vieira † | Itapetininga | Bishop Emeritus of Fortaleza (Ceará), Brazil |
| 15 Jan | 66.1 | Died | Francesco Colangelo, C.O. † | Bishop of Castellammare di Stabia, Italy |
| 17 Jan | 41.0 | Ordained Bishop | Juan de la Cruz Gómez y Plata † | Bishop of Antioquía, Colombia |
| Ordained Bishop | Patrick Kennedy † | Titular Bishop of Leuce | Bishop of Killaloe, Ireland |
| Born | Rocco Tornatore, P.I.M.E. † | Garessio Poggiolo, Italy | Vicar Apostolic of Eastern Burma {Birmania Orientale}, Myanmar |
| 18 Jan | 60.8 | Died | Giuseppe-Maria Lais † | Bishop of Ferentino, Italy |
| 28 Jan | 46.7 | Succeeded | John Briggs † | Vicar Apostolic of Northern District, England, Great Britain | Bishop Emeritus of Beverley, England, Great Britain |
| 63.9 | Died | Thomas Penswick † | Vicar Apostolic of Northern District, England, Great Britain |
| 29 Jan | 23.1 | Ordained Priest | Adam Jasiński † | Priest | Bishop of Przemyśl, Poland |
| 30 Jan | 27.9 | Appointed | St. Pierre-Rose-Ursule Dumoulin-Borie, M.E.P. † | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 27.9 | Appointed | St. Pierre-Rose-Ursule Dumoulin-Borie, M.E.P. † | Titular Bishop of Achantus | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 71.1 | Died | Pedro Inguanzo Rivero † | Cardinal, Archbishop of Toledo, Spain |
| Born | Manuel Santiago Medina y Bañon † | Lima | Bishop of Trujillo, Peru |
| 1 Feb | 65.4 | Confirmed | Joseph Bernet † | Cardinal, Archbishop of Aix (-Arles-Embrun), France |
| 68.0 | Elevated to Cardinal | Jean-Louis Anne Madelain Lefebvre de Cheverus † | Cardinal, Archbishop of Bordeaux, France |
| 53.8 | Confirmed | Leone Ciampa, O.F.M. † | Archbishop of Conza e Campagna, Italy | Archbishop of Sorrento, Italy |
| 34.2 | Appointed | Gabriel della Genga Sermattei † | Cardinal-Priest of San Girolamo dei Croati | Cardinal, Prefect of the Roman Curia - Other |
| 34.2 | Elevated to Cardinal | Gabriel della Genga Sermattei † | Cardinal, Prefect of the Roman Curia - Other |
| 46.6 | Appointed | Nicolas-Joseph Dehesselle † | Bishop of Namur {Namen}, Belgium |
| 36.4 | Confirmed | Ferdinando Matteo Maurizio Bruno di Tournafort † | Bishop of Fossano, Italy |
| 63.0 | Confirmed | Klemens August Droste zu Vischering † | Archbishop of Köln {Cologne}, Germany |
| 48.5 | Confirmed | Costanzo-Michele Fea † | Bishop of Alba (Pompea), Italy |
| 73.4 | Appointed | Nicolaus Ferrarelli † | Titular Archbishop of Myra |
| 57.4 | Appointed | Mateo José González Rubio † | Titular Bishop of Lambaesis | Auxiliary Bishop of Popayán, Colombia |
| 43.8 | Confirmed | Thomas-Marie-Joseph Gousset † | Bishop of Périgueux, France | Cardinal, Archbishop of Reims, France |
| 60.0 | Appointed | Jean-François de Hercé † | Titular Bishop of Botrys | Bishop Emeritus of Nantes, France |
| 60.0 | Confirmed | Jean-François de Hercé † | Coadjutor Bishop of Nantes, France | Bishop Emeritus |
| 69.2 | Appointed | Pietro India † | Titular Bishop of Myrina |
| 56.7 | Appointed | Johann Stanislaus Kutowski † | Auxiliary Bishop of Chelmno (Culma, Kulm), Poland |
| 56.7 | Appointed | Johann Stanislaus Kutowski † | Titular Bishop of Sarepta | Auxiliary Bishop of Chelmno (Culma, Kulm), Poland |
| 53.4 | Appointed | Johann Michael Leonhard † | Titular Bishop of Diocletianopolis in Palaestina | Bishop of Austria, Military |
| 55.2 | Appointed | Francisco Javier Luna-Pizarro y Pacheco de Chávez † | Auxiliary Bishop of Lima, Peru | Archbishop |
| 55.2 | Appointed | Francisco Javier Luna-Pizarro y Pacheco de Chávez † | Titular Bishop of Alalis | Archbishop of Lima, Peru |
| 60.5 | Appointed | Vincenzo Macioti † | Bishop of Ferentino, Italy |
| 56.3 | Confirmed | Maximos III Michel Mazloum † | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 56.3 | Confirmed | Maximos III Michel Mazloum † | Bishop of Damas (Melkite Greek), Syria | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 49.8 | Confirmed | Franciszek de Paula Pišték (Pisztek) † | Archbishop of Lviv, Ukraine | Auxiliary Bishop of Praha {Prague}, Czech Republic |
| 61.9 | Appointed | Georg Prünster † | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 61.9 | Appointed | Georg Prünster † | Titular Bishop of Hypsus | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 52.1 | Confirmed | Louis-Jean-Julien Robiou de la Tréhonnais † | Bishop of Coutances, France | Bishop Emeritus |
| 26.8 | Confirmed | Friedrich Johann Joseph Cölestin zu von Schwarzenberg † | Archbishop of Salzburg, Austria | Cardinal, Archbishop of Praha {Prague}, Czech Republic |
| 58.4 | Appointed | José Luis Serrano † | Bishop of Santa Marta, Colombia |
| 53.8 | Appointed | Stanislao Vincenzo Tomba, B. † | Bishop of Forli, Italy | Archbishop of Camerino, Italy |
| 48.3 | Confirmed | Clément Villecourt † | Bishop of La Rochelle, France | Cardinal, Bishop Emeritus of La Rochelle (-Saintes), France |
| 47.5 | Confirmed | Michael Johann Wagner † | Bishop of Sankt Pölten, Austria |
| 65.2 | Confirmed | Franciszek Ksawery Zachariasiewicz † | Bishop of Tarnów, Poland | Bishop of Przemyśl, Poland |
| 2 Feb | 23.0 | Ordained Priest | Alexander Smith † | Priest | Coadjutor Vicar Apostolic of Western District, Scotland, Great Britain |
| 3 Feb | | Born | Louis-André Navarre, M.S.C. † | Auxerre, France | Vicar Apostolic Emeritus of New Guinea |
| 4 Feb | | Born | Patrick Anthony Ludden † | Breaffy, Ireland | Bishop of Syracuse, New York, USA |
| 6 Feb | 60.8 | Succeeded | Franciszek di Paolo Pawłowski † | Bishop of Płock, Poland |
| 68.1 | Died | Adam Michal Prażmowski † | Bishop of Płock, Poland |
| 7 Feb | 26.3 | Ordained Priest | Modeste Demers † | Priest | Bishop of Vancouver Island, USA |
| 77.0 | Died | Alexis Saussol † | Bishop of Sées, France |
| 8 Feb | | Born | Dionisio Alessandri † | Assisi | Bishop of Fossombrone, Italy |
| Born | Luigi Canali, O.F.M. † | Parma | Titular Archbishop of Ptolemais in Thebaide |
| 12 Feb | | Born | Boghos Bédros (Pierre Paul) XII Sabbaghian † | Alep | Patriarch Emeritus of Cilicia (Armenian), Lebanon |
| 14 Feb | 36.4 | Ordained Bishop | Ferdinando Matteo Maurizio Bruno di Tournafort † | Bishop of Fossano, Italy |
| 17 Feb | 63.7 | Died | Antonio Podestá † | Bishop of Saluzzo, Italy |
| 18 Feb | 87.9 | Died | Carlo Maria Rosini † | Bishop of Pozzuoli, Italy |
| 23 Feb | | Born | Antônio Maria Corrêa de Sá e Benevides † | Campos | Bishop of Mariana, Brazil |
| 24 Feb | 71.0 | Appointed | Francisco Ramón Valentín de Casaus y Torres, O.P. † | Apostolic Administrator of San Cristobal de la Habana, Cuba | Archbishop of Guatemala |
| 51.5 | Resigned | Angel Mariano de Morales y Jasso † | Bishop of Sonora, México | Bishop of Antequera, Oaxaca, México |
| 26 Feb | | Born | François-Joseph-Edwin Bonnefoy † | Lorgues | Archbishop of Aix (-Arles-Embrun), France |
| 27 Feb | 23.8 | Ordained Priest | Konrad Martin † | Priest of Köln {Cologne}, Germany | Bishop of Paderborn, Germany |
| 29 Feb | | Born | Ferdinand Jan Nepomucenus Kalous † | Cerný | Titular Bishop of Gratianopolis |
| 6 Mar | 79.7 | Died | Bernhard Boll, O. Cist. † | Archbishop of Freiburg im Breisgau, Germany |
| 43.8 | Ordained Bishop | Thomas-Marie-Joseph Gousset † | Bishop of Périgueux, France | Cardinal, Archbishop of Reims, France |
| 62.0 | Ordained Bishop | Georg Prünster † | Titular Bishop of Hypsus | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 52.2 | Ordained Bishop | Louis-Jean-Julien Robiou de la Tréhonnais † | Bishop of Coutances, France | Bishop Emeritus |
| 9 Mar | 82.2 | Resigned | Andrea Lucibello † | Bishop of Aquino, Sora, e Pontecorvo, Italy | Bishop Emeritus |
| 10 Mar | 63.9 | Selected | Franz Ferdinand (Johann Franz) Fritz, O.S.B. † | Bishop of Hildesheim, Germany |
| 13 Mar | 48.4 | Ordained Bishop | Clément Villecourt † | Bishop of La Rochelle, France | Cardinal, Bishop Emeritus of La Rochelle (-Saintes), France |
| 18 Mar | 43.9 | Installed | Thomas-Marie-Joseph Gousset † | Bishop of Périgueux, France | Cardinal, Archbishop of Reims, France |
| 19 Mar | 61.8 | Ordained Bishop | Juan José Cabarcas González y Argüello † | Bishop of Panamá |
| 22.9 | Ordained Priest | Giovanni Battista Maneschi † | Priest | Bishop of Veroli, Italy |
| 20 Mar | | Born | John Bilsborrow † | Singleton Lodge, Kirkham | Bishop of Salford, England, Great Britain |
| 23.1 | Ordained Priest | Pedro Jose Puch y Solona † | Priest | Archbishop of La Plata o Charcas, Bolivia |
| 77.0 | Died | Claude-Joseph-Judith-François-Xavier de Sagey † | Bishop Emeritus of Tulle, France |
| 21 Mar | | Born | Clovis-Nicolas-Joseph Catteau † | Sains-les-Marquion | Bishop of Luçon, France |
| 26 Mar | 65.6 | Installed | Joseph Bernet † | Cardinal, Archbishop of Aix (-Arles-Embrun), France |
| 80.3 | Died | Gregorio Ceruelo de la Fuente † | Bishop of Oviedo, Spain |
| 27 Mar | 67.8 | Died | François-Antoine Arbaud † | Bishop of Gap, France |
| 28 Mar | 25.3 | Ordained Deacon | Adam Stanisław Krasiński, Sch. P. † | Deacon of Order of the Pious Schools | Bishop Emeritus of Vilnius, Lithuania |
| 29 Mar | 79.4 | Died | Giuseppe de Nobili † | Archbishop of Lucca, Italy |
| 2 Apr | | Born | Agnello Renzullo † | Napoli | Bishop Emeritus of Nola, Italy |
| 7 Apr | 22.9 | Converted | James Frederick Bryan Wood † | Archbishop of Philadelphia, Pennsylvania, USA |
| 10 Apr | 48.7 | Ordained Bishop | Costanzo-Michele Fea † | Bishop of Alba (Pompea), Italy |
| 11 Apr | | Born | Tommaso Cirielli † | Acquaviva delle Fonti | Prelate of Altamura ed Acquaviva delle Fonti, Italy |
| 14 Apr | 54.7 | Selected | Giuseppe Crispi † | Titular Bishop of Lampsacus |
| 16 Apr | | Born | Toribio Minguella y Arnedo, O.A.R. † | Igea de Cornago, Spain | Bishop Emeritus of Sigüenza, Spain |
| 17 Apr | 47.5 | Died | Jean-Pierre-Marie Cadalen † | Bishop of Saint-Flour, France |
| 60.2 | Ordained Bishop | Jean-François de Hercé † | Titular Bishop of Botrys | Bishop Emeritus of Nantes, France |
| 20 Apr | 75.7 | Died | Jean-Charles-Richard Dancel † | Bishop of Bayeux, France |
| 22 Apr | | Born | Antônio Cândido Alvarenga † | São Paulo | Bishop of São Paulo, Brazil |
| 24 Apr | 35.8 | Selected | Karl August von Reisach † | Bishop of Eichstätt, Germany | Cardinal, Archbishop Emeritus of München und Freising {Munich}, Germany |
| 47.7 | Installed | Michael Johann Wagner † | Bishop of Sankt Pölten, Austria |
| 65.4 | Ordained Bishop | Franciszek Ksawery Zachariasiewicz † | Bishop of Tarnów, Poland | Bishop of Przemyśl, Poland |
| 26 Apr | | Born | Franz Egger † | Obermühltal | Bishop of Brixen {Bressanone}, Italy |
| Born | Luigi Galimberti † | Roma, Italy | Cardinal, Archivist of the Vatican Secret Archives |
| 40.1 | Appointed | St. Laurent-Joseph-Marius Imbert, M.E.P. † | Vicar Apostolic of Corea |
| 40.1 | Appointed | St. Laurent-Joseph-Marius Imbert, M.E.P. † | Titular Bishop of Capsus | Vicar Apostolic of Corea |
| 34.5 | Appointed | Giuiseppe Angelo di Fazio, O.F.M. Cap. † | Coadjutor Vicar Apostolic of Tibet-Hindustan, India |
| 34.5 | Appointed | Giuiseppe Angelo di Fazio, O.F.M. Cap. † | Titular Bishop of Tipasa in Mauretania | Coadjutor Vicar Apostolic of Tibet-Hindustan, India |
| 81.3 | Resigned | Pietro Luigi Scarabelli, C.M. † | Bishop of Luni, Sarzana e Brugnato, Italy | Bishop Emeritus |
| 27 Apr | 67.6 | Selected | Pietro di Benedetto † | Archbishop of Reggio Calabria, Italy |
| 57.4 | Selected | Giuseppe Maria Mazzetti, O. Carm. † | Bishop of Aquino, Sora, e Pontecorvo, Italy | Bishop Emeritus |
| 57.6 | Selected | Giuseppe Riccardi † | Bishop of Boiano, Italy |
| 52.3 | Selected | Gennaro Saladino † | Bishop of Isernia, Italy | Bishop of Isernia e Venafro, Italy |