| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Appointed | Giovanni Battista de Albertis † | Titular Archbishop of Nazianzus | Bishop Emeritus of Ventimiglia, Italy |
| Resigned | Giovanni Battista de Albertis † | Bishop of Ventimiglia, Italy | Bishop Emeritus |
| 25.6 | Ordained Priest | Francisco de Paula Benavides y Navarrete, O.S. † | Priest | Cardinal, Archbishop of Zaragoza, Spain |
| 76.0 | Died | Girolamo Aprile Benso † | Bishop of Piazza Armerina, Italy |
| Born | Carlo Maria Borgognini † | | Archbishop of Modena (e Nonantola), Italy |
| 61.6 | Installed | Juan José Cabarcas González y Argüello † | Bishop of Panamá |
| Died | Francesco Colangelo † | Bishop of Castellammare di Stabia, Italy |
| 23.8 | Ordained Priest | Augustin David † | Priest | Bishop of Saint-Brieuc (-Tréguier), France |
| Born | Ceslaus H. J. Heynen † | | Vicar Apostolic of Curaçao, Netherlands Antilles, Antilles |
| 42.4 | Ordained Priest | Jean-Aimé de Levezou de Vezins † | Priest | Bishop of Agen, France |
| 30.0 | Professed | François-Napoleon Libois, M.E.P. † | Priest of La Société des Missions Etrangères | Prefect Emeritus of Kouangtong, China |
| Died | Andrea Lucibello † | Bishop of Aquino, Sora, e Pontecorvo, Italy |
| 23.3 | Ordained Priest | Jacinto Maria Martínez y Sáez, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Bishop of San Cristobal de la Habana, Cuba |
| Appointed | Giuseppe Mazzetti † | Bishop of Aquino, Sora, e Pontecorvo, Italy | Bishop Emeritus |
| 23.6 | Ordained Priest | Juan Bautista de Ormeachea y Ernáez † | Priest | Bishop of Tulancingo, Hidalgo, México |
| 22.7 | Ordained Priest | Iosif Papp-Szilágyi † | Priest | Bishop of Oradea Mare {Gran Varadino} (Romanian), Romania |
| 23.3 | Ordained Priest | Etienne-Emile Ramadié † | Priest | Archbishop of Albi, France |
| Died | Carlo Maria Rosini † | Bishop of Pozzuoli, Italy |
| 17.7 | Professed | Luigi Celestino Spelta, O.F.M. † | Member of Order of Friars Minor | Vicar Apostolic of Hupeh {Hu-Pè}, China |
| 71.2 | Resigned | Placide-Bruno Valayer † | Bishop of Verdun, France | Bishop Emeritus |
| Jan | 56.0 | Resigned | Tommaso Bernetti † | Secretary of the Secretariat of State | Cardinal, Secretary Emeritus |
| 1 Jan | | Born | Raffaele Pierotti, O.P. † | Sorbano | Cardinal, Priest of Order of Friars Preachers |
| 6 Jan | | Born | Kazimierz Ruszkiewicz † | Mariampol | Auxiliary Bishop of Warszawa {Warsaw}, Poland |
| 7 Jan | | Born | Rocco Tornatore, P.I.M.E. † | Garessio Poggiolo | Vicar Apostolic of Eastern Burma {Birmania Orientale}, Myanmar |
| 10 Jan | | Born | John Coffey † | Kerry | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| Born | Gesu Maria Rodriguez † | 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 |
| 13 Jan | | Born | Tommaso Gomes de Almeida † | Castelloes | Bishop of Guarda, Portugal |
| 17 Jan | | Ordained Bishop | Patrick Kennedy † | Coadjutor Bishop of Killaloe, Ireland | Bishop |
| 22.8 | Ordained Priest | Giuseppe Valerga † | Priest | Patriarch of Gerusalemme {Jerusalem}, Palestine |
| 19 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 Jasinski † | Priest | Bishop of Przemyśl, Poland |
| 30 Jan | 71.1 | Died | Pedro Inguanzo Rivero † | Cardinal, Archbishop of Toledo, Spain |
| Born | Emmanuele Giacomo Medina † | 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 | Appointed | Leone Ciampa, O.F.M. † | Archbishop of Conza-Campagna, Italy | Archbishop of Sorrento, Italy |
| 34.2 | Appointed | Gabriel della Genga Sermattei † | Cardinal-Priest of S. Girolamo dei Croati (degli Schiavoni) | 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 | Appointed | Ferdinando Matteo Maurizio Bruno di Tournafort † | Bishop of Fossano, Italy |
| 63.0 | Confirmed | Klemens August Freiherr Droste zu Vischering † | Archbishop of Köln {Cologne}, Germany |
| 48.5 | Appointed | Costanzo-Michele Fea † | Bishop of Alba (Pompea), Italy |
| 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 |
| 56.7 | Appointed | Johann Stanislaus Kutowski † | Auxiliary Bishop of Chelmno (Culma), Poland |
| 56.7 | Appointed | Johann Stanislaus Kutowski † | Titular Bishop of Sarepta | Auxiliary Bishop of Chelmno (Culma), Poland |
| 53.4 | Appointed | Johann Michael Leonhard † | Titular Bishop of Diocletianopolis in Palaestina | Bishop of Austria, Military |
| 60.5 | Appointed | Vincenzo Macioti † | Bishop of Ferentino, Italy |
| 49.8 | Appointed | Francesco di Paolo Pischtek † | Archbishop of Lviv, Ukraine |
| 61.9 | Appointed | Georg Prünster † | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 61.9 | Appointed | Georg Prünster † | Titular Bishop of the Titular See | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 52.1 | Confirmed | Louis-Jean-Julien Robiou de la Tréhonnais † | Bishop of Coutances, France | Bishop Emeritus of Coutances (-Avranches), France |
| 26.8 | Confirmed | Friedrich Johann Joseph Cölestin Fürst zu von Schwarzenberg † | Archbishop of Salzburg, Austria | Cardinal, Archbishop of Praha {Prague}, Czech Republic |
| 58.4 | Appointed | Luigi-Giuseppe 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 | Appointed | Francesco-Saverio Zachariasiewicz † | Bishop of Tarnów, 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 |
| 6 Feb | 60.8 | Succeeded | Francesco di Paolo Pawtowski † | 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 |
| 12 Feb | | Born | Boghos Bédros (Paul Peter) XII Sabbaghian † | Alep | Patriarch Emeritus of Cilicia (Armenian), Lebanon |
| 17 Feb | | Died | Antonio Podestá † | Bishop of Saluzzo, 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 |
| 25 Feb | | Born | John Hutchinson, O.S.A. † | Clodiagh, Ireland | Vicar Apostolic of Cooktown, Australia |
| 27 Feb | | Born | François-Joseph-Edwin Bonnefoy † | Lorgues | Archbishop of Aix (-Arles-Embrun), France |
| 23.8 | Ordained Priest | Martin Konrad † | Priest of Köln {Cologne}, Germany | Bishop of Paderborn, Germany |
| 29 Feb | | Born | Ferdinand Giovanni Nepom. Kalous † | Cerny | 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 the Titular See | Auxiliary Bishop of Brixen {Bressanone}, Italy |
| 52.2 | Ordained Bishop | Louis-Jean-Julien Robiou de la Tréhonnais † | Bishop of Coutances, France | Bishop Emeritus of Coutances (-Avranches), France |
| 10 Mar | 63.9 | Appointed | 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 |
| 20 Mar | | Born | John Bilsborrow † | Singleton Fylde | Bishop of Salford, England, Great Britain |
| 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 la Fuente † | Bishop of Oviedo, Spain |
| 27 Mar | 67.8 | Died | François-Antoine Arbaud † | Bishop of Gap, France |
| 29 Mar | | Died | Giuseppe de Nobili † | Archbishop of Lucca, Italy |
| 1 Apr | | Born | Agnello Renzullo † | Napoli | Bishop Emeritus of Nola, Italy |
| 9 Apr | | Born | Tommaso Cirielli † | Acquaviva delle Fonti | Prelate of Altamura e Acquaviva delle Fonti, Italy |
| 12 Apr | | Born | Antônio Cândido Alvarenga † | São Paulo | Bishop of São Paulo, Brazil |
| 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 |
| 19 Apr | 35.8 | Appointed | Karl August Graf von Reisach † | Bishop of Eichstätt, Germany | Cardinal, Archbishop Emeritus of München und Freising {Munich}, Germany |
| 20 Apr | 74.7 | Died | Jean-Charles-Richard Dancel † | Bishop of Bayeux, France |
| 24 Apr | 47.7 | Installed | Michael Johann Wagner † | Bishop of Sankt Pölten, Austria |
| 26 Apr | | Born | Franz Egger † | Obermühltal | Bishop of Brixen {Bressanone}, Italy |
| Born | Luigi Galimberti † | Rome | 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 Capsa | 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 |
| 1 May | 27.1 | Ordained Bishop | Friedrich Johann Joseph Cölestin Fürst zu von Schwarzenberg † | Archbishop of Salzburg, Austria | Cardinal, Archbishop of Praha {Prague}, Czech Republic |
| 11 May | 62.8 | Appointed | Ignatz Anton Demeter † | Archbishop of Freiburg im Breisgau, Germany |
| 13 May | 62.8 | Resigned | Johann Georg Bossi † | Bishop of Sankt Gallen, Switzerland | Bishop of Chur-Sankt Gallen, Switzerland |
| 58.9 | Appointed | Jean-Jacques Lartigue, P.S.S. † | Bishop of Montréal, Québec, Canada |
| 34.4 | Appointed | Jean-Baptiste-François Pompallier, S.M. † | Vicar Apostolic of Western Oceania | Bishop Emeritus of Auckland, New Zealand |
| 34.4 | Appointed | Jean-Baptiste-François Pompallier, S.M. † | Titular Bishop of Maronea | Bishop Emeritus of Auckland, New Zealand |
| 16 May | | Born | Joaquim José Vieira † | Itapetininga | Bishop Emeritus of Ceará, Brazil |
| Born | Alfred-Casimir-Alexis Williez † | Chinon | Bishop of Arras (, Boulogne, e Saint-Omer), France |
| 18 May | 63.4 | Resigned | Francesco Tiberi Contigliano † | Bishop of Jesi, Italy | Cardinal, Bishop Emeritus |
| 22 May | 57.0 | Ordained Bishop | Johann Stanislaus Kutowski † | Titular Bishop of Sarepta | Auxiliary Bishop of Chelmno (Culma), Poland |
| 25 May | 41.0 | Appointed | Mellon de Jolly † | Bishop of Sées, France | Archbishop Emeritus of Sens (-Auxerre), France |
| 46.6 | Appointed | Louis-François Robin † | Bishop of Bayeux, France | Bishop of Bayeux (-Lisieux), France |
| 28 May | 24.7 | Ordained Priest | Nicolas-Joseph Dabert † | Priest of Viviers, France | Bishop of Périgueux (-Sarlat), France |
| 24.5 | Ordained Priest | Jacques-Maurice des Landes d’Aussac De Saint Palais † | Priest of Vincennes, Indiana, USA | Bishop |
| 29 May | 63.4 | Installed | Klemens August Freiherr Droste zu Vischering † | Archbishop of Köln {Cologne}, Germany |
| 3 Jun | | Born | Carlos Luiz d'Amour † | São Luis do Maranhão | Archbishop of Cuiabá, Mato Grosso, Brazil |
| 7 Jun | | Succeeded | Patrick Kennedy † | Bishop of Killaloe, Ireland |
| Died | Patrick MacMahon (McMahon) † | Bishop of Killaloe, Ireland |
| 13 Jun | 25.5 | Professed | Victor-Auguste-Isidore Dechamps, C.SS.R. † | Priest of Congregation of the Most Holy Redeemer | Cardinal, Archbishop of Mechelen, Belgium |
| 14 Jun | | Died | Lodovico Loschi † | Bishop of Piacenza, Italy |
| 21 Jun | | Born | Luigi Tripepi † | Cardetto | Cardinal, Pro-Prefect of the Congregation of Rites |
| 22 Jun | | Born | Edouard-Adolphe Cantel † | Marseille | Bishop of Oran, Algeria |
| 25 Jun | 25.2 | Ordained Priest | St. John Nepomucene Neumann, C.SS.R. † | Priest of Congregation of the Most Holy Redeemer | Bishop of Philadelphia, Pennsylvania, USA |
| 26 Jun | | Born | Aeneas Chisholm † | Inverness | Bishop of Aberdeen, Scotland, Great Britain |
| 30 Jun | 34.7 | Ordained Bishop | Giuiseppe Angelo di Fazio, O.F.M. Cap. † | Titular Bishop of Tipasa in Mauretania | Coadjutor Vicar Apostolic of Tibet-Hindustan, India |
| 34.6 | Ordained Bishop | Jean-Baptiste-François Pompallier, S.M. † | Titular Bishop of Maronea | Bishop Emeritus of Auckland, New Zealand |