| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 25.7 | Ordained Priest | Paul Cullen † | Priest | Cardinal, Archbishop of Dublin, Ireland |
| 62.0 | Appointed | Jean-Joseph Delplancq † | Bishop of Tournai {Doornik}, Belgium |
| 24.8 | Ordained Priest | Jean-Sébastien-Adolphe Devoucoux † | Priest | Bishop of Evreux, France |
| 23.0 | Ordained Priest | Joseph Dixon † | Priest | Archbishop of Armagh, Ireland |
| 28.5 | Incardinated | Justo Donoso Vivanco † | Priest of Santiago de Chile | Bishop of La Serena, Chile |
| Died | Antonio Faà † | Bishop of Asti, Italy |
| 77.3 | Appointed | Antonio Frosini † | Prefect of the Congregation for Indulgences and Relics | Cardinal, Prefect Emeritus |
| 57.4 | Died | Ignacy Giedroyc † | Coadjutor Bishop of Samogizia o Tels (Zmudz), Lithuania |
| Born | Gioacchino Guglielmo Gonzales † | Medellin | Bishop Emeritus of Antioquía, Colombia |
| 61.6 | Appointed | Michele Lanzetta † | Bishop of Oria, Italy | Bishop of Lacedonia, Italy |
| Appointed | Ciampa Leone † | Archbishop of Reggio Calabria, Italy |
| Died | Andrea de Lucia † | Bishop of Calvi e Teano, Italy |
| 28.3 | Ordained Priest | Jean-Pierre Mabile † | Priest | Bishop of Versailles, France |
| 83.3 | Died | Orazio Magliola † | Bishop of Acerra, Italy |
| Born | José Ignacio Ordóñez † | Cuenca | Archbishop of Quito, Ecuador |
| 23.1 | Ordained Priest | Louis-Martin Porchez † | Priest | Bishop of Martinique (Fort-de-France e Saint Pierre), Martinique, Antilles |
| 26.9 | Incardinated | Valentin von Riedel † | Priest of München und Freising {Munich}, Germany | Bishop of Regensburg, Germany |
| Died | José Maria de Santana e Noronha † | Bishop of Bragança e Miranda, Portugal |
| Appointed | Luca de Sigalla † | Bishop of Santorini {Thira}, Greece |
| Died | Felice Tiberi † | Bishop of Valva e Sulmona, Italy |
| Died | Francesco Saverio Triggiani † | Bishop of Oria, Italy |
| 50.0 | Appointed | Jean-François Van de Velde † | Bishop of Gent {Ghent, Gand}, Belgium |
| 3 Jan | | Born | Francesco Solano Risco, O.F.M. † | Lima | Bishop Emeritus of Chachapoyas, Peru |
| 6 Jan | | Born | Angelo Balzano † | Castel di Sangro | Bishop of Termoli, Italy |
| 79.0 | Died | Giuseppe Manfrin Provedi † | Bishop of Chioggia, Italy |
| 7 Jan | 61.8 | Appointed | Giovanni Francesco Falzacappa † | Cardinal, Prefect of the Apostolic Signatura |
| 9 Jan | | Born | Domenico Pio Rossi, O.P. † | Bologna | Bishop of Concordia, Italy |
| 11 Jan | 62.2 | Ordained Bishop | Joachim-Jean-Xavier d'Isoard † | Archbishop of Auch, France | Cardinal, Archbishop of Lyon (-Vienne), France |
| 46.3 | Ordained Bishop | Johann Michael Leonhard † | Titular Bishop of Alalis | Bishop of Austria, Military |
| 12 Jan | | Born | Edward Gilpin Bagshawe, C.O. † | London | Bishop Emeritus of Nottingham, England, Great Britain |
| 15 Jan | 81.3 | Died | Tadeusz Kundzicz † | Auxiliary Bishop of Vilnius, Lithuania |
| Born | John Leonard † | Dublin, Ireland | Vicar Apostolic of Cape of Good Hope, Western District {Capo di Buona Speranza, Distretto Occidentale}, South Africa |
| 16 Jan | | Born | Boghos Bédros (Paul Peter) XI Emmanuélian † | Telerpen, Turkey | Patriarch of Cilicia (Armenian), Lebanon |
| 30.4 | Appointed | Costantino Patrizi Naro † | Apostolic Nuncio to Other | Cardinal, Secretary of the Congregation for Universal Inquisition |
| Born | Americo Ferreira dos Santos Silva † | Porto | Cardinal, Bishop of Porto, Portugal |
| 17 Jan | | Born | Augustus Maria Bernard Anthony John Gebhard Toebbe † | Meppen, Germany | Bishop of Covington, Kentucky, USA |
| 18 Jan | 40.9 | Ordained Bishop | Louis-François-Auguste de Rohan-Chabot † | Cardinal, Archbishop of Besançon, France |
| 19 Jan | | Born | Francesco Cenci, O.F.M. Cap. † | Loreto | Titular Bishop of Apollonia |
| 21 Jan | | Born | Paul Leopold Haffner † | Horb | Bishop of Mainz, Germany |
| 23 Jan | | Born | Giacinto Magliuolo † | Frignano Maggiore | Bishop of Accra, Ghana |
| 24 Jan | | Appointed | Emanuele Bellorado, O.P. † | Bishop of Sant’Agata de’ Goti, Italy |
| 25 Jan | 63.7 | Ordained Bishop | Giovanni Antonio Benvenuti † | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 29 Jan | 71.1 | Died | Pierre-François-Gabriel-Raymond-Ignace-Ferdinand de Bausset-Roquefort † | Archbishop of Aix (-Arles-Embrun), France |
| 2 Feb | 23.6 | Ordained Priest | John Martin Henni † | Priest of Cincinnati, Ohio, USA | Archbishop of Milwaukee, Wisconsin, USA |
| 5 Feb | 74.7 | Died | Louis-Sylvestre de La Châtre † | Titular Bishop of Himeria |
| 40.9 | Installed | Louis-François-Auguste de Rohan-Chabot † | Cardinal, Archbishop of Besançon, France |
| 6 Feb | | Born | Julien-François-Pierre Carmené † | Trébry, France | Bishop Emeritus of Martinique (Fort-de-France e Saint Pierre), Martinique, Antilles |
| 8 Feb | | Born | Vital-Justin Grandin, O.M.I. † | Saint-Pierre-la-Cour, France | Bishop of Saint Albert, Alberta, Canada |
| 69.5 | Appointed | Charles-Alexandre de Richery † | Archbishop of Aix (-Arles-Embrun), France |
| 9 Feb | 59.3 | Ordained Bishop | Stanisław Kostka Choromański † | Titular Bishop of Adrasus | Archbishop of Warszawa {Warsaw}, Poland |
| Born | Josef Jan Hais † | Budetic | Bishop of Hradec Králové, Czech Republic |
| 10 Feb | 68.5 | Died | Annibale Francesco Clemente Melchiore Girolamo Nicola della Genga † | Pope (Roma {Rome}, Italy) |
| 13 Feb | 75.6 | Died | Jakub Ignacy Dederko † | Bishop of Minsk, Belarus |
| Born | Edward Henry Howard † | Nottingham, Great Britain | Cardinal, Bishop of Frascati, Italy |
| 15 Feb | 53.0 | Ordained Bishop | Ignacy Ludwik Pawlowski † | Titular Bishop of Megara | Archbishop of Mohilev, Belarus |
| 18 Feb | 73.5 | Died | Giovanni Francesco Marazzani Visconti † | Cardinal, Priest of the Roman Curia - Other |
| 19 Feb | | Born | Johannes Fidelis Battaglia † | Parsonz | Bishop Emeritus of Chur, Switzerland |
| 72.2 | Died | Jean-Baptiste-François-Nicolas Millaux † | Bishop of Nevers, France |
| 24 Feb | 55.8 | Ordained Bishop | Ignacio Ribes Mayor † | Bishop of Calahorra y La Calzada, Spain | Archbishop of Burgos, Spain |
| 1 Mar | | Born | Antonius von Thoma † | Nymphenburg | Archbishop of München und Freising {Munich}, Germany |
| 3 Mar | 42.7 | Succeeded | Peter Augustine Baines, O.S.B. † | Vicar Apostolic of Western District, England, Great Britain |
| 72.0 | Died | Peter Bernardine Collingridge, O.F.M. † | Vicar Apostolic of Western District, England, Great Britain |
| 6 Mar | 59.1 | Resigned | Tomas Manoel de Noronha e Brito, O.P. † | Bishop of Olinda, Brazil | Bishop Emeritus |
| 10 Mar | | Born | Giuseppe Apollonio † | Venezia | Bishop of Treviso, Italy |
| Born | Antonio Ibáñez y Galiano † | Almansa | Bishop of Teruel (-Albarracín), Spain |
| 11 Mar | | Born | Giovanni di Dio Bosque † | Sorata d'Esquival | Bishop of La Paz, Bolivia |
| 14 Mar | 24.7 | Ordained Priest | Johann Theodor Laurent † | Priest of Liège, Belgium | Vicar Apostolic Emeritus of Luxembourg |
| 28.1 | Ordained Priest | Louis Amadeus Rappe † | Priest of Arras, France | Bishop Emeritus of Cleveland, Ohio, USA |
| 15 Mar | | Born | Pierre-Hector Coullié (Couillié) † | Paris | Cardinal, Archbishop of Lyon (-Vienne), France |
| 24 Mar | 16.0 | Professed | Mariano Cuartero y Medina, O.P. † | Member of Order of Friars Preachers | Bishop of Jaro, Philippines |
| 25 Mar | 43.5 | Ordained Bishop | Daniel McDonnell † | Titular Bishop of Olympus | Vicar Apostolic of Trinidad, Trinidad and Tobago, Antilles |
| 26 Mar | | Born | Ercole Boffi † | Sezze | Bishop of Bagnoregio (Bagnorea), Italy |
| Born | Pierre-Marie Osouf, M.E.P. † | Cérisy-la-Salle, France | Archbishop of Tokyo, Japan |
| 61.1 | Appointed | Godehard Joseph Osthaus † | Bishop of Hildesheim, Germany |
| 30 Mar | | Born | Luigi Pallotti † | Albano Laziale | Cardinal, Prefect of the Roman Curia - Other |
| 31 Mar | 78.5 | Appointed | Giuseppe Andrea Albani † | Secretary of the Secretariat of State | Cardinal, Librarian of the Vatican Library |
| 67.4 | Elected | Francesco Saverio Maria Felice Castiglioni † | Pope (Roma {Rome}, Italy) |
| 2 Apr | 87.6 | Died | Sébastien-Michel Amelot † | Bishop Emeritus of Vannes, France |
| 3 Apr | 75.7 | Died | Roch-Etienne de Vichy † | Bishop of Autun, France |
| 4 Apr | 70.1 | Appointed | Pietro Caprano † | Cardinal, Prefect of the Congregation of the Index |
| 5 Apr | 67.4 | Installed | Francesco Saverio Maria Felice Castiglioni † | Pope (Roma {Rome}, Italy) |
| 7 Apr | 64.6 | Appointed | Bernhard Galura † | Bishop of Brixen {Bressanone}, Italy |
| 11 Apr | | Appointed | Juan Nepomuceno Gómez Durán † | Bishop of Málaga, Spain |
| 15 Apr | 57.9 | Appointed | Charles de Douhet d'Auzers † | Bishop of Nevers, France |
| Born | Tullio Sericci † | Ancona | Bishop of Comacchio, Italy |
| 16 Apr | 40.3 | Appointed | Philippe-Marie-Thérèse-Guy Carron † | Bishop of Le Mans, France |
| 31.8 | Appointed | Bénigne-Urbain-Jean-Marie du Trousset d'Héricourt † | Bishop of Autun, France |
| 67.8 | Appointed | Louis-Charles-Jean-Baptiste Michel † | Bishop of Fréjus, France |
| 20 Apr | 30.7 | Ordained Priest | Jacobus Gerardus Schepers † | Priest | Vicar Apostolic of Dutch Guyana-Suriname, Suriname, Antilles |
| 22 Apr | 65.0 | Appointed | Pedro Rodriguez Miranda, O. de M. † | Bishop of Jaca, Spain |
| 23 Apr | | Born | Jorge Montes Solar † | Illapel | Auxiliary Bishop of Santiago de Chile |
| 26 Apr | 55.5 | Ordained Bishop | José Asensio Ocón y Toledo † | Bishop of Palencia, Spain | Bishop of Teruel, Spain |
| 66.0 | Died | José Antonio Joaquín Pérez Martínez y Robles † | Bishop of Tlaxcala, Tlaxcala, México |
| 54.2 | Appointed | José Talayero Royo, O.P. † | Bishop of Albarracin, Spain |
| 30 Apr | | Succeeded | James Browne † | Bishop of Kilmore, Ireland |
| Died | Fargal O'Reilly † | Bishop of Kilmore, Ireland |
| 3 May | 25.7 | Ordained Priest | Luis José Gabriel Segura y Cubas † | Priest | Bishop of Paraná, Argentina |
| 7 May | 67.5 | Died | Hilarión Díez, O.S.A. † | Archbishop of Manila, Philippines |
| 10 May | | Appointed | Ignazio Giustiniani † | Titular Bishop of Gabala | Bishop of Chios (Scio), Greece |
| Born | John Joseph Hogan † | Bruff, Ireland | Bishop of Kansas City, Missouri, USA |
| 15 May | 36.4 | Appointed | William Kinsella † | Bishop of Ossory, Ireland |
| 33.7 | Appointed | Michael Portier † | Bishop of Mobile, Alabama, USA |
| 60.6 | Ordained Bishop | Teofil von Wolicki † | Archbishop of Gniezno-Poznań, Poland |
| 18 May | 54.5 | Appointed | Luigi Bovio, O.S.B. † | Bishop of Melfi-Rapolla, Italy |
| 58.1 | Appointed | Matteo Franco † | Bishop of Catanzaro, Italy |
| 70.4 | Appointed | Emmanuele de Gregorio † | Bishop of Frascati, Italy | Cardinal, Secretary of the Roman Curia - Other |
| 70.4 | Appointed | Emmanuele de Gregorio † | Cardinal-Bishop of Frascati | Cardinal, Secretary of the Roman Curia - Other |
| 49.1 | Confirmed | Josef Anton Salzmann † | Bishop of Basel, Switzerland |
| 48.8 | Appointed | Sebastiano Soldati † | Bishop of Treviso, Italy |
| 19 May | 54.3 | Confirmed | José Talayero Royo, O.P. † | Bishop of Albarracin, Spain |
| 21 May | 53.6 | Appointed | Michele Bombini † | Bishop of Cassano all’Jonio, Italy |
| 40.6 | Installed | Benedetto Colonna Barberini di Sciarra † | Cardinal-Priest of S. Maria sopra Minerva | Cardinal, Archpriest of the Basilica di San Giovanni in Laterano {Saint John Lateran Basilica} |
| 55.7 | Installed | Gustave-Maximilien-Juste de Croÿ-Solre † | Cardinal-Priest of S. Sabina | Cardinal, Archbishop of Rouen, France |
| 59.8 | Installed | Karl Kajetan Graf von Gaisruck (Gaysruck) † | Cardinal-Priest of S. Marco | Cardinal, Archbishop of Milano {Milan}, Italy |
| 68.2 | Installed | Jean-Baptist-Marie-Anne-Antoine de Latil † | Cardinal-Priest of S. Sisto | Cardinal, Archbishop of Reims, France |
| 68.5 | Appointed | Niccola Mazzoni † | Bishop of Terni, Italy |
| 64.3 | Appointed | Vincenzo Rocca † | Bishop of Larino, Italy |
| 69.3 | Appointed | Georg Michael Wittmann † | Auxiliary Bishop of Regensburg, Germany |
| 69.3 | Appointed | Georg Michael Wittmann † | Titular Bishop of Comama | Auxiliary Bishop of Regensburg, Germany |
| 27 May | 74.4 | Died | Jean-François Martin de Boisville † | Bishop of Dijon, France |
| 64.3 | Ordained Bishop | Vincenzo Rocca † | Bishop of Larino, Italy |
| 28 May | | Born | Germán de Ascensión Villalvazo y Rodríguez † | Atenguillo | Bishop of Chiapas (Ciudad Real de Chiapas), Chiapas, México |
| 31 May | 70.5 | Ordained Bishop | Emmanuele de Gregorio † | Bishop of Frascati, Italy | Cardinal, Secretary of the Roman Curia - Other |
| Jun | 24.2 | Ordained Priest | Pierre-Louis Coeur † | Priest | Bishop of Troyes, France |
| 3 Jun | 23.0 | Ordained Priest | William Barber Tyler † | Priest of Boston, Massachusetts, USA | Bishop of Hartford, Connecticut, USA |
| 7 Jun | 66.9 | Appointed | Jacques Raillon † | Bishop of Dijon, France | Archbishop of Aix (-Arles-Embrun), France |
| 11 Jun | 78.6 | Died | Louis-Siffrein-Joseph de Salamon † | Bishop of Saint-Flour, France |
| 13 Jun | 25.5 | Ordained Priest | Jean-René Bessieux, C.S.Sp. † | Priest of Congregation of the Holy Spirit | Vicar Apostolic of Two Guineas {Des Deux Guinées}, Gabon |
| 23.8 | Ordained Priest | Antoine-Charles Cousseau † | Priest | Bishop Emeritus of Angoulême, France |
| 22.6 | Ordained Priest | Mariano Falcinelli Antoniacci, O.S.B. † | Priest of Order of Saint Benedict | Cardinal, Official of the Roman Curia - Other |
| 24.2 | Ordained Priest | Jean-Baptiste-Amédée Georges-Massonnais † | Priest of Bordeaux, France | Bishop of Périgueux (-Sarlat), France |
| 23.7 | Ordained Priest | Prosper-Michel-Arnaud Hiraboure † | Priest of Bayonne, France | Bishop of Aire et Dax, France |
| 24.1 | Ordained Priest | Gregoria María López Zaragoza † | Priest | Bishop of Plasencia, Spain |
| 27.5 | Ordained Priest | Jean-Baptiste-François Pompallier, S. M. † | Priest of Society of Mary | Bishop Emeritus of Auckland, New Zealand |
| 28.9 | Ordained Priest | Angelo Ramazzotti † | Priest | Patriarch of Venezia {Venice}, Italy |
| 14 Jun | | Born | Bernard-Thadée Petitjean, M.E.P. † | Blanzy-sur-Bourbince, France | Vicar Apostolic of Southern Japan |
| 19 Jun | 24.2 | Ordained Priest | Etienne-Raymond Albrand, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Kuiceu, China |
| 25 Jun | 58.5 | Died | James Magauran † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 28 Jun | 69.4 | Ordained Bishop | Georg Michael Wittmann † | Titular Bishop of Comama | Auxiliary Bishop of Regensburg, Germany |
| 29 Jun | | Born | Filippo Allegro † | Costa Bacelega | Bishop of Albenga, Italy |
| 37.4 | Ordained Bishop | Barthélemy Bruguière, M.E.P. † | Titular Bishop of Capsa | Vicar Apostolic of Corea |
| 30 Jun | | Born | Yves-Marie Croc, M.E.P. † | Coatréven, France | Vicar Apostolic of Southern Tonking {Tonkino Meridionale}, Viêt Nam |