| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 55.0 | Died | Manuel Abad y Queipo † | Former Bishop-Elect of Michoacán, México |
| Ordained Bishop | Basile Asmar † | Bishop of Amadiyah (Chaldean), Iraq | Archbishop Emeritus of Diarbekir (Amida) (Chaldean), Turkey |
| Ordained Bishop | Carlos de São José de Azevedo e Sousa, O.F.M. † | Bishop of Guarda, Portugal |
| 64.8 | Appointed | Pietro Caprano † | Secretary of the Congregation for Propagation of the Faith | Cardinal, Prefect of the Congregation of the Index |
| Appointed | Pietro Consiglio † | Bishop of Termoli, Italy | Archbishop of Brindisi, Italy |
| 24.0 | Ordained Priest | Jean-Pierre Dalmond, C.S.Sp. † | Priest | Prefect of Madagascar, Madagascar |
| 57.2 | Appointed | Joachim-Jean-Xavier d’Isoard † | Dean of the Roman Rota | Cardinal, Archbishop of Auch, France |
| Appointed | Inocêncio António das Neves Portugal † | Bishop of Faro {Algarve}, Portugal |
| Died | Inocêncio António das Neves Portugal † | Bishop of Faro {Algarve}, Portugal |
| 36.2 | Incardinated | Johann Franz Drepper † | Priest of Paderborn, Germany | Bishop |
| 24.5 | Ordained Priest | Jerónimo Fernández y Andrés † | Priest | Bishop of Palencia, Spain |
| 22.5 | Ordained Priest | Joaquín Fernández de Madrid y Canal † | Priest of Puebla de los Angeles, Puebla, México | Titular Bishop of Tanagra |
| 84.0 | Died | Antoine Etienne Aconcius Kover, O.M. Ven. † | Titular Archbishop of Siunia |
| Appointed | Francesco Vincenzo Lombard † | Bishop of Susa, Italy |
| 27.6 | Appointed | Martinus Johannes Niewindt † | Prefect of Curaçao, Netherlands Antilles, Antilles | Vicar Apostolic of Curaçao, Netherlands Antilles, Antilles |
| 16.0 | Professed | Giuseppe Pecci, S.J. † | Member of Society of Jesus | Cardinal, Prefect of the Congregation for Studies |
| 64.7 | Resigned | Claude-Joseph-Judith-François-Xavier de Sagey † | Bishop of Tulle, France | Bishop Emeritus |
| 73.9 | Ordained Bishop | Jozef Schedy † | Bishop of the Titular See |
| Born | Thomas Sears † | | Prefect of Western Newfoundland (St. George’s), Canada |
| 24.3 | Ordained Priest | Jaime José Soler y Roquer † | Priest | Bishop of Teruel, Spain |
| Died | Carlo Sozzi † | Archbishop Emeritus of Milano {Milan}, Italy |
| 1 Jan | | Born | Bernardo Antonio De Riso, O.S.B. † | Catanzaro | Bishop of Catanzaro, Italy |
| 79.4 | Appointed | Benedetto Naro † | Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} | Cardinal, Prefect of the Roman Curia - Other |
| 79.0 | Died | St. Vincenzo Maria Strambi, C.P. † | Bishop of Macerata-Tolentino, Italy |
| 2 Jan | 88.2 | Died | Filippo Trigona † | Bishop of Siracusa, Italy |
| 3 Jan | | Born | Gabriel Szele (Gzele) † | Jászberény | Auxiliary Bishop of Eger, Hungary |
| 26.2 | Ordained Deacon | José Vicente Ramírez de Arellano † | Deacon | Bishop of Córdoba (Tucumán), Argentina |
| 4 Jan | | Born | Ignacio Antonio Parra † | Tunja | Bishop of Nueva Pamplona, Colombia |
| Born | Joseph-Clair Reyne † | Manosque, France | Bishop of Guadeloupe et Basse-Terre, Guadeloupe, Antilles |
| 5 Jan | | Born | Aquilino Ferreyra y Alvarez † | Rosario | Auxiliary Bishop of Córdoba (Tucumán), Argentina |
| 26.2 | Ordained Priest | José Vicente Ramírez de Arellano † | Priest | Bishop of Córdoba (Tucumán), Argentina |
| 10 Jan | | Born | Bernard O’Reilly † | Ballybeg | Bishop of Liverpool, England, Great Britain |
| 11 Jan | | Born | Leonardo Giannotti, O.F.M. † | Torcigliano | Bishop of Modigliana, Italy |
| 12 Jan | | Born | Francis Xavier Krautbauer † | Mappach, Germany | Bishop of Green Bay, Wisconsin, USA |
| 13 Jan | 51.0 | Appointed | Vincent Battucci † | Archbishop of Bar (Antivari), Montenegro |
| 66.6 | Appointed | Ercole Consalvi † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 51.8 | Appointed | Thomas Penswick † | Coadjutor Vicar Apostolic of Northern District, England, Great Britain | Vicar Apostolic |
| 51.8 | Appointed | Thomas Penswick † | Titular Bishop of Europus | Vicar Apostolic of Northern District, England, Great Britain |
| 54.8 | Appointed | Giacinto Placido Zurla, O.S.B. † | Titular Archbishop of Edessa in Macedonia | Cardinal, Prefect of the Congregation for Studies |
| 18 Jan | 73.5 | Ordained Bishop | Jacques-Alexis Jacquemin † | Bishop of Saint-Dié, France | Bishop Emeritus |
| 48.2 | Ordained Bishop | Marie-Joseph-François-Victor Monyer de Prilly † | Bishop of Châlons, France |
| 59.0 | Ordained Bishop | Jean-François de Saunhac-Belcastel † | Bishop of Perpignan-Elne, France |
| 54.8 | Ordained Bishop | Giacinto Placido Zurla, O.S.B. † | Titular Archbishop of Edessa in Macedonia | Cardinal, Prefect of the Congregation for Studies |
| 19 Jan | 36.2 | Ordained Bishop | Claude-Marie-Paul Tharin † | Bishop of Strasbourg, France | Bishop Emeritus |
| 22 Jan | 80.5 | Died | Jean Baptiste Robert van Velde de Melroy et Sart-Bomal † | Bishop Emeritus of Roermond, Netherlands |
| 23 Jan | | Born | Eugenio Luzzi † | Spoleto | Bishop of Todi, Italy |
| 24 Jan | 66.6 | Died | Ercole Consalvi † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 25 Jan | 61.2 | Ordained Bishop | Gilbert-Paul Aragonès d’Orcet † | Bishop of Langres, France |
| 69.7 | Ordained Bishop | Louis-Sylvestre de La Châtre † | Titular Bishop of Hemeria |
| 29 Jan | 83.2 | Died | Joseph von Stubenberg † | Archbishop of Bamberg, Germany |
| Feb | 23.9 | Professed | Feliciano (Laurentius Joachim) Barbacci, O.F.M. † | Member of Order of Friars Minor | Bishop of Cortona, Italy |
| 68.2 | Appointed | Francesco Guidobono Cavalchini † | Prefect of the Roman Curia - Other | Cardinal, Priest of Roma {Rome}, Italy |
| 2 Feb | 72.4 | Died | Luigi Pandolfi † | Cardinal, Cardinal-Priest of Santa Sabina |
| 65.2 | Died | Francesco Saverio (François-Xavier) Pereira † | Bishop of Rieti, Italy |
| 5 Feb | | Born | Alfonso Capecelatro di Castelpagano, C.O. † | Marseille, France | Cardinal, Archbishop of Capua, Italy |
| 8 Feb | | Born | François-Louis Fleck † | Niederbronn | Bishop of Metz, France |
| Ordained Bishop | Konstanty Wincenty Plejewski † | Titular Bishop of Lagania | Auxiliary Bishop of Płock, Poland |
| 9 Feb | 66.8 | Appointed | Jakob Peregrin Paulitsch † | Bishop of Gurk, Austria |
| 12 Feb | | Born | Emanuel Jan Schöbel † | Radowenz | Bishop of Litoměřice, Czech Republic |
| 22 Feb | 22.7 | Ordained Priest | Ruggero Blundo, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Cefalù, Italy |
| 23 Feb | 67.4 | Ordained Bishop | François-François Besson † | Bishop of Metz, France |
| 24 Feb | 81.3 | Died | Veremundo Anselmo Arias Teixeiro † | Archbishop of Valencia, Spain |
| 25 Feb | 28.3 | Ordained Priest | Pedro Barajas y Moreno † | Priest | Bishop of San Luis Potosí, México |
| 26 Feb | | Born | Salvatore Maria Nisio, Sch. P. † | Molfetta | Bishop Emeritus of Ariano, Italy |
| 29 Feb | 63.3 | Ordained Priest | Antonio Domenico Gamberini † | Priest | Cardinal, Bishop Emeritus of Orvieto, Italy |
| 1 Mar | | Born | Luigi Bruno † | Battaglia | Bishop of Ruvo e Bitonto, Italy |
| 4 Mar | 60.0 | Selected | Petrus Pustet † | Bishop of Eichstätt, Germany |
| 70.7 | Died | Juan Antonio Zulaibar, O.P. † | Archbishop of Manila, Philippines |
| 7 Mar | | Born | Antonio Pistocchi † | Cerchiara | Bishop of Cassano all’Jonio, Italy |
| 9 Mar | | Born | Michele Castelli † | Smirne | Bishop of Tinos, Greece |
| 77.5 | Died | Jean-Charles de Coucy † | Archbishop of Reims, France |
| 10 Mar | 55.4 | Selected | Joseph Maria Johann Nepomuk von Fraunberg † | Archbishop of Bamberg, Germany |
| 56.7 | Selected | Ignatz Albert (Joseph Ignatz Alexius) von Riegg, O.S.A. † | Bishop of Augsburg, Germany |
| 13 Mar | 25.2 | Ordained Priest | Godehard Braun † | Priest of Trier, Germany | Auxiliary Bishop |
| 23.1 | Ordained Priest | Giuseppe Chiaromanni † | Priest | Bishop of Colle di Val d’Elsa, Italy |
| 24.2 | Ordained Priest | Joseph-Auguste-Victorin Morlhon † | Priest | Bishop of Le Puy-en-Velay, France |
| 23.1 | Ordained Priest | Giuseppe Luigi Trevisanato † | Priest | Cardinal, Patriarch of Venezia {Venice}, Italy |
| 17 Mar | 47.9 | Selected | Víctor Damián Sáez y Sánchez Mayor † | Bishop of Tortosa, Spain |
| 20 Mar | 47.6 | Selected | Evasio Secundo Agodino † | Bishop of Aosta, Italy |
| 72.5 | Selected | François-Marie Bigex † | Archbishop of Chambéry, France |
| 53.9 | Selected | Pierre-Joseph Rey † | Bishop of Pinerolo, Italy | Bishop of Annecy, France |
| 22 Mar | 60.5 | Selected | Giovanni Corcione † | Bishop of Bova, Italy |
| 65.9 | Selected | Giovanni Battista de Martino di Pietradoro † | Bishop of Alife, Italy | Bishop of Telese o Cerreto Sannita, Italy |
| 65.9 | Selected | Giovanni Battista de Martino di Pietradoro † | Bishop of Telese o Cerreto Sannita, Italy |
| 25 Mar | 60.1 | Selected | Juan José Cordón Leyva † | Bishop of Guadix, Spain |
| 60.8 | Installed | Augustin Johann Joseph Gruber † | Archbishop of Salzburg, Austria |
| 35.2 | Ordained Bishop | Joseph Rosati, C.M. † | Coadjutor Bishop of Louisiana and the Two Floridas (Saint Louis of New Orleans), USA | Bishop of Saint Louis, Missouri, USA |
| 27 Mar | | Born | Lörinc Schlauch † | Uj-Arad | Cardinal, Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania |
| 28 Mar | | Born | Francesco Zunnui Casula † | Fonni | Archbishop of Oristano, Italy |
| 30 Mar | 83.8 | Died | Jean-François Périer, O.P. † | Bishop Emeritus of Avignon, France | Bishop |
| 1 Apr | | Born | Joseph Colgan † | Donore, Ireland | Archbishop of Madras, India |
| Born | Bl. Louis-Zéphirin Moreau † | Bécancour | Bishop of Saint-Hyacinthe, Québec, Canada |
| 3 Apr | 74.0 | Died | Jean-Paul Faudoas † | Bishop Emeritus of Meaux, France |
| 5 Apr | 29.1 | Ordained Deacon | Wincenty Lipski † | Deacon | Auxiliary Bishop of Tiraspol (Cherson), Moldova |
| Born | Felice Maria de Neckere † | Ypris, Belgium | Titular Archbishop of Melitene |
| 6 Apr | 32.6 | Appointed | Jean-François Ollivier, M.E.P. † | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam | Vicar Apostolic |
| 32.6 | Appointed | Jean-François Ollivier, M.E.P. † | Titular Bishop of Castoria | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 9 Apr | 66.5 | Resigned | Teresio Maria Carlo Vittorio Ferrero della Marmora † | Bishop of Saluzzo, Italy | Cardinal, Bishop Emeritus |
| 16 Apr | | Born | Auguste Marchal † | Raon l'Étape | Auxiliary Bishop Emeritus of Bourges, France |
| 17 Apr | 24.1 | Ordained Priest | Feliciano (Laurentius Joachim) Barbacci, O.F.M. † | Priest of Order of Friars Minor | Bishop of Cortona, Italy |
| 23.0 | Ordained Priest | Nicola Bedini † | Priest | Bishop of Terracina, Priverno e Sezze, Italy |
| 26.8 | Ordained Deacon | Anton Fiałkowski † | Deacon | Archbishop of Mohilev, Belarus |
| 20 Apr | | Born | John William Bewick † | Minister Acres | Bishop of Hexham and Newcastle, England, Great Britain |
| 25 Apr | 68.5 | Selected | Ramón María Adurriaga Uribe † | Bishop of Avila, Spain |
| 23.1 | Ordained Priest | José António Pereira Bilhano † | Priest | Archbishop of Évora, Portugal |
| 26 Apr | 63.1 | Selected | Jean-Baptist-Marie-Anne-Antoine de Latil † | Cardinal, Archbishop of Reims, France |
| 55.1 | Selected | Claude-Hippolyte Clausel de Montals † | Bishop of Chartres, France | Bishop Emeritus |
| 27 Apr | | Born | Joseph-Sébastien-Ferdinand Terris † | Bonnieux | Bishop of Fréjus, France |
| 28 Apr | | Born | Miguel León y Garrido † | Cuenca | Bishop of Cuenca, Ecuador |
| 29 Apr | 55.9 | Selected | Leonardo Santander y Villavicencio † | Bishop of Jaca, Spain | Bishop of Astorga, Spain |
| 30 Apr | 58.3 | Appointed | Francisco de São Luiz (Manoel Justiniano) Saraiva, O.S.B. † | Titular Bishop of Dura | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 58.3 | Resigned | Francisco de São Luiz (Manoel Justiniano) Saraiva, O.S.B. † | Bishop of Coimbra, Portugal | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |