| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Appointed | Nicola Abrate † | Bishop of Terni, Italy |
| 32.7 | Appointed | Gregorio Atta † | Archbishop of Homs (-Hama-Jabrud) (Melkite), Syria |
| 74.0 | Died | François-René Boussen † | Bishop of Brugge {Bruges}, Belgium |
| 65.7 | Died | Leone Ciampa, O.F.M. † | Archbishop of Conza-Campagna, Italy |
| 23.0 | Ordained Priest | José Nicanor Corona e Izarraraz † | Priest | Bishop of San Luis Potosí, San Luís Potosí, México |
| Died | Giuseppe Maria d'Alessandro † | Bishop of Sessa Aurunca, Italy |
| 48.3 | Died | Ferdinando Matteo Maurizio Bruno di Tournafort † | Bishop of Fossano, Italy |
| 81.5 | Died | Carlo Fontanini † | Bishop of Concordia, Italy |
| 74.0 | Died | Taddeo Garzilli (Garzillo) † | Bishop of Acerra, Italy |
| 84.8 | Died | Francesco Maria Gazzoli † | Bishop of Todi, Italy |
| 61.4 | Resigned | Sebastião da Anunciação Gomes de Lemos, O.C.D. † | Bishop of Angola e Congo, Angola | Bishop Emeritus |
| 70.4 | Died | Giandomenico Guida † | Bishop of Oria, Italy |
| 40.2 | Appointed | Ignacy Hołowinski † | Coadjutor Archbishop of Mohilev, Belarus | Archbishop |
| 40.2 | Appointed | Ignacy Hołowinski † | Titular Archbishop of Carystus | Archbishop of Mohilev, Belarus |
| 26.8 | Ordained Priest | Raimondo Ingheo † | Priest | Bishop Emeritus of Iglesias, Italy |
| Born | Jules-Basile Kandelaft † | | Vicar Apostolic of Le Caire {Cairo} (Syrian), Egypt |
| Born | Henri-Charles Lambrecht † | | Bishop of Gent {Ghent, Gand}, Belgium |
| 24.0 | Ordained Priest | François-Albert Leuillieux † | Priest | Archbishop of Chambéry, France |
| 65.8 | Resigned | Angelo Mai † | Prefect of the Roman Curia - Other | Cardinal, Librarian of the Vatican Library |
| 61.3 | Died | Francesco-Paolo Mastropasqua † | Bishop of Nusco, Italy |
| Born | Giuseppe Melchisedechian † | Erzerum | Bishop of Garin (Erzerum) (Armenian) |
| 22.9 | Ordained Priest | Karol Rimely † | Priest | Bishop of Banská Bystrica, Slovakia |
| 24.3 | Ordained Priest | Francisco de Paula Suárez Peredo y Bezares † | Priest | Bishop of Veracruz-Jalapa, México |
| 38.5 | Resigned | Vincenzo Tizzani, C.R.L. † | Bishop of Terni, Italy | Bishop Emeritus |
| 49.5 | Succeeded | John Francis (William) Whelan, O.C.D. † | Vicar Apostolic of Bombay, India | Vicar Apostolic Emeritus |
| 41.6 | Appointed | Amadio Zangari † | Bishop of Civita Castellana, Orte e Gallese, Italy | Bishop of Macerata-Tolentino, Italy |
| 1 Jan | | Born | Giovanni Vescia † | Trani | Bishop of Policastro, Italy |
| 2 Jan | | Born | Alexander Christie † | Highgate, VT, USA | Archbishop of Oregon City, Oregon, USA |
| 65.8 | Ordained Bishop | Manuel Joaquín Tarancón y Morón † | Bishop of Córdoba, Spain | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| Born | Eutimio Zulhof, B.S. † | Damasco | Archbishop of Tyr (Melkite), Lebanon |
| 3 Jan | | Born | Giacomo Abrahamo, O.A.O.C. † | Telkef | Bishop of Gazireh (Gezira) (Chaldean), Turkey |
| 72.4 | Died | Johann Leonard Pfaff † | Bishop of Fulda, Germany |
| 5 Jan | 21.0 | Professed | Antonio Maria Grasselli, O.F.M. Conv. † | Member of Order of Friars Minor Conventual | Bishop Emeritus of Viterbo e Tuscania, Italy |
| 11 Jan | | Appointed | Tommaso Feeny † | Bishop of Killala, Ireland |
| 41.9 | Died | Francesco Saverio Massimo † | Cardinal, Priest of the Roman Curia - Other |
| 13 Jan | | Appointed | Nicolás Joaquín de Arteta y Calisto † | Archbishop of Quito, Ecuador |
| Born | Andrea Elia Celebian † | Diarbekir | Bishop of Amida (Diarbekir) (Armenian), Turkey |
| 14 Jan | | Appointed | Niccola Adolfo Marinelli † | Bishop of Santorini {Thira}, Greece | Bishop Emeritus |
| 15 Jan | 81.6 | Died | Francesco Luigi Piervisani † | Bishop of Nocera Umbra, Italy |
| 16 Jan | 24.1 | Ordained Priest | Bernard John Joseph McQuaid † | Priest of New York, New York, USA | Bishop of Rochester, New York, USA |
| 17 Jan | 67.7 | Appointed | Manuel Ramón Arias Teijeiro de Castro † | Bishop of Santander, Spain | Bishop Emeritus |
| 55.4 | Appointed | Joaquín Barbarejo Villar † | Bishop of León, Spain |
| 47.6 | Confirmed | Henri-Marie-Gaston Boisnormand de Bonnechose † | Bishop of Carcassonne, France | Cardinal, Archbishop of Rouen, France |
| 45.0 | Confirmed | Paul-Armand-Ignace-Anaclet Cardon de Garsignies † | Bishop of Soissons (-Laon), France |
| 68.5 | Appointed | Ignacio Díaz Caneja † | Bishop of Oviedo, Spain |
| 78.1 | Appointed | Luis Antonio Folgueras Sión † | Archbishop of Granada, Spain |
| 71.9 | Appointed | Pablo García Abella, C.O. † | Archbishop of Valencia, Spain |
| 67.8 | Appointed | Salvador José Reyes García de Lara † | Bishop of Málaga, Spain | Archbishop of Granada, Spain |
| 20 Jan | 65.8 | Appointed | Vicente Ortiz Labastida, O.P. † | Bishop of Tarazona, Spain |
| 70.1 | Appointed | Tomás de Portes e Infante † | Archbishop of Santo Domingo, Dominican Republic |
| 56.5 | Appointed | Carlo Vizzardelli † | Cardinal, Cardinal-Priest of S. Pancrazio |
| 56.5 | Elevated to Cardinal | Carlo Vizzardelli † | Cardinal, Cardinal-Priest of S. Pancrazio |
| 25 Jan | | Born | Pablo Padilla y Bárcena † | Jujuy | Bishop of Tucumán, Argentina |
| 30 Jan | 47.7 | Ordained Bishop | Henri-Marie-Gaston Boisnormand de Bonnechose † | Bishop of Carcassonne, France | Cardinal, Archbishop of Rouen, France |
| 1 Feb | 53.0 | Resigned | Gabriele Ferretti † | Secretary of the Secretariat of State | Cardinal, Secretary Emeritus |
| 4 Feb | | Born | François-Marie-Joseph Delamaire † | Paris | Archbishop of Cambrai, France |
| Born | José López Mendoza y García, O.S.A. † | Frías | Bishop of Pamplona, Spain |
| 20 Feb | 59.7 | Ordained Bishop | Buenaventura Codina Augerolas, C.M. † | Bishop of Islas Canarias {Canary Islands}, Spain |
| 49.3 | Ordained Bishop | Joaquín Fernández Cortina † | Bishop of Sigüenza, Spain |
| 25 Feb | 45.1 | Ordained Bishop | Paul-Armand-Ignace-Anaclet Cardon de Garsignies † | Bishop of Soissons (-Laon), France |
| 32.8 | Ordained Bishop | Charles Henry Davis, O.S.B. † | Bishop of Maitland, Australia |
| 27 Feb | 66.5 | Ordained Bishop | Gregorio Sánchez Rubio, O.S.H. † | Bishop of Osma, Spain | Bishop of Avila, Spain |
| 1 Mar | | Born | François-Léon Gauthey † | Chalon-sur-Saône | Archbishop of Besançon, France |
| 2 Mar | 36.2 | Appointed | Alexandre-Hippolyte-Xavier Monnet, C.S.Sp. † | Superior General of Congregation of the Holy Spirit | Vicar Apostolic of Madagascar, Madagascar |
| 5 Mar | 42.3 | Ordained Bishop | Mariano Benito Barrio Fernández † | Bishop of Cartagena (en España) | Cardinal, Archbishop of Valencia, Spain |
| 50.3 | Ordained Bishop | Florencio Llorente Montón † | Bishop of Gerona, Spain |
| 51.4 | Ordained Bishop | Rafael Manso † | Bishop of Mallorca, Spain | Bishop of Zamora, Spain |
| 10 Mar | | Installed | Juan Francisco del Rosario Manfredo y Ballestas † | Bishop of Panamá |
| 12 Mar | 53.0 | Ordained Bishop | Josef von Lipp † | Bishop of Rottenburg, Germany |
| 13 Mar | | Born | Boleslaw Hieronim Klopotowski † | | Archbishop of Mohilev, Belarus |
| Born | Paul-Augustin Lecoeur † | Rouen | Bishop of Saint-Flour, France |
| 71.5 | Died | Cipriano Sánchez Varela † | Bishop of Plasencia, Spain |
| 14 Mar | 84.8 | Died | Carlo Puoti † | Bishop of Alife, Italy |
| 18 Mar | | Born | John Edmund Luck, O.S.B. † | Peckham, Great Britain | Bishop of Auckland, New Zealand |
| 65.0 | Ordained Bishop | Pedro José Zarandia Endara † | Bishop of Orense, Spain | Bishop of Huesca, Spain |
| 19 Mar | 43.2 | Ordained Bishop | José Domingo Costa Borrás † | Bishop of Lérida, Spain | Archbishop of Tarragona, Spain |
| 62.9 | Ordained Bishop | Miguel José Irigoyen † | Bishop of Zamora, Spain | Bishop of Calahorra y La Calzada, Spain |
| Born | Giuseppe Izzo † | Boscotrecase | Bishop of Cava e Sarno, Italy |
| 68.0 | Ordained Bishop | Antonio Lao Cuevas † | Bishop of Teruel, Spain | Bishop of Guadix, Spain |
| 53.0 | Installed | Josef von Lipp † | Bishop of Rottenburg, Germany |
| 64.7 | Ordained Bishop | Manuel López Santisteban † | Bishop of Avila, Spain | Bishop Emeritus |
| 23 Mar | | Born | Carlo Falcini † | Prato | Bishop of San Miniato, Italy |
| 25 Mar | | Born | François-Marie Kersuzan † | Grand-Champ, France | Bishop Emeritus of Cap-Haïtien, Haïti |
| 24.5 | Ordained Priest | James O’Connor † | Priest of Pittsburgh, Pennsylvania, USA | Bishop of Omaha, Nebraska, USA |
| Born | Wolfgang Radnai † | Chisineu-Cris, Romania | Bishop Emeritus of Banská Bystrica, Slovakia |
| 28 Mar | | Born | Marie-Jean-Célestin Douais † | Boujan-sur-Libron | Bishop of Beauvais (-Noyon-Senlis), France |
| 23.5 | Ordained Priest | Joseph Hergenröther † | Priest of Würzburg, Germany | Cardinal, Prefect of the Vatican Secret Archives |
| 29 Mar | 46.4 | Appointed | Christoph Florentius Kött † | Bishop of Fulda, Germany |
| 30 Mar | 70.6 | Died | Ramón Montero † | Archbishop of Burgos, Spain |
| Born | Juan Manuel Sanz y Saravia † | Puebla de los Infantes | Bishop of Jaén, Spain |
| 8 Apr | 27.9 | Ordained Priest | William Lanigan † | Priest of Cashel (-Emly), Ireland | Bishop of Goulburn, Australia |
| 9 Apr | 69.7 | Ordained Bishop | Anacleto Meoro Sánchez † | Bishop of Almería, Spain |
| Born | St. Ezequiel Moreno y Díaz, O.A.R. † | Alfaro, Spain | Bishop of Pasto, Colombia |
| 67.7 | Ordained Bishop | Juan Gilberto Ruiz Capucín y Feijó † | Bishop of Cuenca, Ecuador |
| 10 Apr | 42.2 | Died | William J. Quarter † | Bishop of Chicago, Illinois, USA |
| 14 Apr | 58.0 | Appointed | Vicente Barreiro y Pérez, O.S.A. † | Bishop of Nueva Segovia, Philippines |
| 37.5 | Appointed | Francesco Gandolfi † | Auxiliary Bishop of Sabina (-Farfa), Italy | Bishop Emeritus of Tarquinia e Civitaveccia, Italy |
| 37.5 | Appointed | Francesco Gandolfi † | Titular Bishop of Antipatris | Bishop Emeritus of Tarquinia e Civitaveccia, Italy |
| 44.5 | Appointed | Miguel García Cuesta † | Bishop of Jaca, Spain | Cardinal, Archbishop of Santiago de Compostela, Spain |
| 61.2 | Appointed | Manuel Grijalvo y Mínguez † | Bishop of Nueva Caceres, Philippines |
| Appointed | Nicola Rossi † | Bishop of Todi, Italy |
| 15 Apr | 74.4 | Died | Giuseppe Gaetano Incontri † | Bishop of Volterra, Italy |
| 16 Apr | 43.5 | Ordained Bishop | Domingo Canubio Alberto, O.P. † | Bishop of Segorbe, Spain |
| 18 Apr | 50.4 | Appointed | José Xavier de Cerveira e Sousa † | Bishop of Beja, Portugal | Bishop of Viseu, Portugal |
| 37.9 | Appointed | Martin John Spalding † | Coadjutor Bishop of Louisville, Kentucky, USA | Archbishop of Baltimore, Maryland, USA |
| 19 Apr | 47.1 | Appointed | Marie-Laurent Trioche † | Archbishop of Baghdad, Iraq |
| 23 Apr | 51.5 | Died | John Stephen (Jean Etienne) Bazin † | Bishop of Vincennes, Indiana, USA |
| Born | Edward Joseph Dunne † | Gortnahoe, Ireland | Bishop of Dallas, Texas, USA |
| 43.2 | Ordained Bishop | José Escolano Fenoy † | Bishop of Jaén, Spain |
| 53.5 | Died | Paul Naudo † | Archbishop of Avignon, France |
| 24 Apr | 67.7 | Died | Johann Aloys Hoffmann † | Auxiliary Bishop of Salzburg, Austria |
| 27 Apr | 77.3 | Died | Roman Sebastian (Franz Xaver) Zängerle, O.S.B. † | Bishop of Seckau, Austria |
| 28 Apr | 28.5 | Appointed | Jean-Baptiste Anouilh, C.M. † | Coadjutor Vicar Apostolic of Peking [Beijing], China | Vicar Apostolic of Southwestern Chi-Li {Ce-Li Meridio-Occidentale}, China |
| 28.5 | Appointed | Jean-Baptiste Anouilh, C.M. † | Titular Bishop of Abydus | Vicar Apostolic of Southwestern Chi-Li {Ce-Li Meridio-Occidentale}, China |
| 2 May | | Born | Paul-Gaston Laperrine d'Hautpoul † | Sainte-Eulalie, France | Official of the Sacred Consistorial Congregation |
| 7 May | 34.4 | Appointed | Nikolaus Adames † | Pro-Vicar Apostolic of Luxembourg | Bishop Emeritus of Luxembourg |
| 9 May | 35.6 | Appointed | François Baudichon † | Vicar Apostolic of Marquesas Islands {Isole Marchesi}, French Polynesia, Pacific (Oceania) | Vicar Apostolic Emeritus |
| 54.4 | Appointed | Andreas Charvaz † | Titular Archbishop of Sebaste in Cilicia | Archbishop of Genova, Italy |
| 42.2 | Appointed | Antoine-Magloire Doumer, SS.CC. † | Coadjutor Vicar Apostolic of Tahiti {Isole Tahiti}, French Polynesia, Pacific (Oceania) |
| 42.2 | Appointed | Antoine-Magloire Doumer, SS.CC. † | Titular Bishop of Iuliopolis | Coadjutor Vicar Apostolic of Tahiti {Isole Tahiti}, French Polynesia, Pacific (Oceania) |
| 33.1 | Appointed | Florentin-Etienne Jaussen † | Vicar Apostolic of Tahiti {Isole Tahiti}, French Polynesia, Pacific (Oceania) | Vicar Apostolic Emeritus |
| 33.1 | Appointed | Florentin-Etienne Jaussen † | Titular Bishop of Axieri (Azieri) | Vicar Apostolic Emeritus of Tahiti {Isole Tahiti}, French Polynesia, Pacific (Oceania) |
| 13 May | | Born | Giuseppe Foschiani † | Gemona | Bishop of Belluno e Feltre, Italy |
| 14 May | 67.4 | Ordained Bishop | Francisco Javier Rodríguez Obregón † | Bishop of Badajoz, Spain |
| 15 May | | Born | Giuseppe Rockossian † | Costantinopoli | Titular Archbishop of Achrida |
| Born | Giuseppe Rokossian † | Costantinopoli | Archbishop of Istanbul (Armenian), Turkey |
| 16 May | | Born | Juan Antón de la Fuente † | Burgos | Bishop Emeritus of Teruel (-Albarracín), Spain |
| 17 May | | Born | Narsete Gindoyan, C.A.M. † | Kawatar | Bishop of Mush degli Armeni |
| 21 May | 23.1 | Ordained Priest | Johann Evangelist Haller † | Priest of Trento, Italy | Cardinal, Archbishop of Salzburg, Austria |
| 65.8 | Ordained Bishop | Santiago Rodríguez Gil, O.P. † | Bishop of Lugo, Spain |
| 23 May | 47.1 | Appointed | Guillaume-Clément Masson, M.E.P. † | Coadjutor Vicar Apostolic of Southern Tonking {Tonkino Meridionale}, Viêt Nam |
| 47.1 | Appointed | Guillaume-Clément Masson, M.E.P. † | Titular Bishop of Laranda | Coadjutor Vicar Apostolic of Southern Tonking {Tonkino Meridionale}, Viêt Nam |
| 24 May | | Born | Salvatore Tolu † | Cargeghe | Archbishop of Oristano, Italy |
| 25 May | | Born | Manuel Felipe Rodríguez Delgado † | Chacao | Bishop of Santo Tomás de Guayana, Venezuela |
| 27 May | 87.1 | Died | Jean Jacoupy † | Bishop Emeritus of Agen, France |
| 29 May | | Born | Charles Cox, O.M.I. † | Birkenhead, Great Britain | Vicar Apostolic Emeritus of Transvaal, South Africa |
| Jun | 46.1 | Appointed | Vincent Jekelfalussy † | Bishop of Spiš, Slovakia | Bishop of Székesfehérvár (Albareale), Hungary |
| 24.4 | Ordained Priest | Joseph-Clair Reyne † | Priest | Bishop of Guadeloupe et Basse-Terre, Guadeloupe, Antilles |
| 4 Jun | 68.7 | Appointed | Giovanni Soglia Ceroni † | Cardinal, Secretary of the Secretariat of State |
| 6 Jun | 26.9 | Ordained Priest | James Danell † | Priest | Bishop of Southwark, England, Great Britain |
| 7 Jun | | Born | Ignacio Ibáñez, O.P. † | Toro, Spain | Vicar Apostolic of Amoy, China |
| 9 Jun | | Born | Antonio Tomas da Silva Leitão e Castro † | Lisbona | Bishop of Lamego, Portugal |
| 14 Jun | | Born | Andrea Caron † | Rosà de Bassano Veneto | Archbishop Emeritus of Genova, Italy |
| 17 Jun | 27.1 | Ordained Priest | Eugène-Étienne Charbonnier, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Eastern Cochin {Cocincina Orientale}, Viêt Nam |
| 24.4 | Ordained Priest | François-Louis Fleck † | Priest | Bishop of Metz, France |
| 25.3 | Ordained Priest | Robert Herzog † | Priest of Wrocław, Poland | Bishop |
| 22.7 | Ordained Priest | Michael von Rampf † | Priest of München und Freising {Munich}, Germany | Bishop of Passau, Germany |
| Born | James Ryan † | Farnaybridge, Thurles, Ireland | Bishop of Alton, Illinois, USA |
| 25.6 | Ordained Priest | François-Ferdinand Tagliabue, C.M. † | Priest of Congregation of the Mission | Vicar Apostolic of Northern Chi-Li {Ce-Li Settentrionale} o Pe-Kin, China |
| 20 Jun | 44.5 | Appointed | Jean-René Bessieux, C.S.Sp. † | Vicar Apostolic of Two Guineas and Senegambia {Guinea Superiore e Inferiore e di Sierra Leone}, Gabon | Vicar Apostolic of Two Guineas {Des Deux Guinées}, Gabon |
| 44.5 | Appointed | Jean-René Bessieux, C.S.Sp. † | Titular Bishop of Callipolis | Vicar Apostolic of Two Guineas {Des Deux Guinées}, Gabon |
| 46.5 | Appointed | Jean-Baptiste-François Pompallier, S.M. † | Bishop of Auckland, New Zealand | Bishop Emeritus |
| 38.7 | Appointed | Philippe-Joseph Viard, S.M. † | Apostolic Administrator of Wellington, New Zealand | Bishop |
| 22 Jun | | Born | Pietro Terroni † | Guinadi di Pontremoli | Bishop of Borgo San Donnino, Italy |
| 23 Jun | 75.2 | Died | Giuseppe Maria Giove † | Bishop of Gallipoli, Italy | Bishop of Bova, Italy |
| 24 Jun | 25.4 | Ordained Priest | Kaspar (Balthasar) Willi, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Chur, Switzerland |
| 27 Jun | 54.7 | Died | Denis-Auguste Affre † | Archbishop of Paris, France |