| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Appointed | Matteo Aceto † | Bishop of Nusco, Italy |
| 25.3 | Ordained Priest | Juan José de Aycinena y Piñol † | Priest | Auxiliary Bishop of Guatemala |
| 55.7 | Appointed | Bernardino Bollati † | Bishop of Biella, Italy |
| Appointed | Francesco Buonomo † | Bishop of Gaeta, Italy |
| Appointed | Adeodato Gomez Cardosa † | Bishop of Cassano all’Jonio, Italy | Bishop of Isernia, Italy |
| Appointed | Arcangelo Gabriele Cela † | Bishop of Anglona-Tursi, Italy |
| Born | Peter Francis Crinnon † | Cullen, Ireland | Bishop of Hamilton, Ontario, Canada |
| Died | Antonio David † | Bishop of Narni, Italy |
| Appointed | Eustachio Dentice, C.R. † | Archbishop of Manfredonia (e Vieste), Italy |
| 82.0 | Appointed | Bernardo Maria della Torre † | Bishop of Castellammare di Stabia, Italy |
| Appointed | João Inácio da Fonseca Manso † | Bishop of Leiria, Portugal |
| 55.1 | Appointed | Antonio Faà di Bruno † | Bishop of Asti, Italy |
| 53.4 | Incardinated | Bernhard Galura † | Priest of Brixen {Bressanone}, Italy | Bishop |
| 61.2 | Appointed | Paolo Garzilli † | Bishop of Bovino, Italy | Bishop of Sessa Aurunca, Italy |
| 68.0 | Appointed | Adrijan Holovnja (Holownia), O.S.B.M. † | Auxiliary Bishop of Minsk, Belarus | Auxiliary Bishop Emeritus |
| 54.0 | Appointed | Lev (Leon) Javorskyj (Jaworowski), O.S.B.M. † | Auxiliary Bishop of Foreign Diocese |
| Died | Józef Krystofowicz † | Titular Bishop of Arca in Phoenicia |
| Appointed | Baldassare Leone † | Bishop of Agrigento (Girgenti), Italy |
| Appointed | Michelangelo Lupoli † | Archbishop of Conza-Campagna, Italy | Archbishop of Salerno (-Acerno), Italy |
| 72.3 | Appointed | Orazio Magliola † | Bishop of Sant’Agata de’ Goti, Italy | Bishop of Acerra, Italy |
| Appointed | Giuseppe Crispino Mazzotti † | Bishop of Tivoli, Italy | Bishop of Cervia, Italy |
| Appointed | Verissimo Monteiro da Serra, C.M. † | Bishop of Peking [Beijing], China | Former Bishop-Elect |
| 23.2 | Ordained Priest | Paul Naudo † | Priest | Archbishop of Avignon, France |
| 54.0 | Appointed | Giuseppe Maria Pellicano † | Bishop of Gerace, Italy |
| 72.0 | Appointed | Giuseppe Maria Peruzzi † | Bishop of Vicenza, Italy |
| 91.6 | Died | Giovanni Saverio Pirelli † | Bishop of Ariano, Italy |
| 54.6 | Appointed | Carlo Puoti † | Archbishop of Rossano, Italy | Bishop of Alife, Italy |
| 22.8 | Ordained Priest | Bartolomeo Carlo Romilli † | Priest | Archbishop of Milano {Milan}, Italy |
| Appointed | Domenico Russo † | Bishop of Ariano, Italy |
| Resigned | Carlo Sozzi † | Archbishop of Milano {Milan}, Italy | Archbishop Emeritus |
| Appointed | Michele Spinelli † | Archbishop of Sorrento, Italy |
| Appointed | Felice Tiberi † | Bishop of Valva e Sulmona, Italy |
| Died | Salvatore Vecchioni † | Bishop of Anglona-Tursi, Italy |
| 21.4 | Ordained Priest | Jozef Vibe(r) † | Priest | Auxiliary Bishop of Rožňava, Slovakia |
| 6 Jan | 52.0 | Installed | Louis-Guillaume-Valentin Dubourg, P.S.S. † | Bishop of Louisiana and the Two Floridas (Saint Louis of New Orleans), USA | Archbishop of Besançon, France |
| 9 Jan | 61.3 | Died | José Maria de Melo † | Bishop Emeritus of Faro {Algarve}, Portugal |
| Born | Tommaso Reggio † | Genova | Archbishop of Genova, Italy |
| 11 Jan | 50.8 | Ordained Bishop | José Ignacio de Arancibia y Hormaguei, O.F.M. † | Bishop of Linares o Nueva León, Nuevo León, México |
| 77.4 | Died | Joaquim de Santa Clara Brandão (Lopes), O.S.B. † | Archbishop of Évora, Portugal |
| 13 Jan | | Appointed | Aloisio Gandolfi, C.M. † | Vicar Apostolic of Alep, Syria |
| 14 Jan | | Born | Hilarión Alcázar, O.P. † | Villatobas, Spain | Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viêt Nam |
| 15 Jan | 75.0 | Died | Giovanni Francesco d’Alessandria † | Bishop of Catanzaro, Italy |
| 17 Jan | 85.2 | Died | Martin Takáts † | Auxiliary Bishop of Kalocsa, Hungary |
| 19 Jan | 81.7 | Died | Carlo Crivelli † | Cardinal, Official of the Roman Curia - Other |
| 27 Jan | | Born | Jan Chryzostom Janiszenwski † | Pudliszki | Auxiliary Bishop of Gniezno-Poznań, Poland |
| 30 Jan | | Born | Franz de Paula Albert Eder, O.S.B. † | Hallein | Archbishop of Salzburg, Austria |
| 31 Jan | | Died | Richard O'Reilly † | Archbishop of Armagh, Ireland |
| Feb | 58.7 | Installed | Bernardo del Espíritu Santo Martínez y Ocejo, O.C.D. † | Bishop of Sonora, Sonora, México |
| 1 Feb | 78.8 | Died | Wojciech Gorski † | Bishop of Kielce, Poland |
| 31.1 | Ordained Bishop | Jacques-Léonard Pérocheau, M.E.P. † | Titular Bishop of Maxula Prates | Vicar Apostolic of Northwestern Szechwan {Se-Ciuen Settentrionale-Occidentale}, China |
| 5 Feb | 72.2 | Appointed | Matthäus Georg von Chandelle † | Bishop of Speyer, Germany |
| 72.2 | Appointed | Franz Karl Joseph Fürst von Hohenlohe-Waldenburg-Schillingsfürst † | Bishop of Augsburg, Germany |
| 77.2 | Appointed | Joseph Graf von Stubenberg † | Archbishop of Bamberg, Germany |
| 8 Feb | 54.1 | Died | Luca Amici † | Bishop of Ferentino, Italy |
| 11 Feb | 92.4 | Died | José Francisco Miguel António de Mendonça Valdereis † | Cardinal, Patriarch of Lisboa, Portugal |
| 15 Feb | | Born | Giovanni Acquaviva, C.O. † | Tricarico | Bishop of Nusco, Italy |
| 59.6 | Ordained Bishop | Pedro Valera y Jiménez † | Archbishop of Santo Domingo, Dominican Republic |
| 16 Feb | 57.1 | Appointed | Lothar Anselm Freiherr von Gebsattel † | Archbishop of München und Freising {Munich}, Germany |
| 69.6 | Resigned | Joseph Jakob von Heckenstaller † | Vicar Apostolic of Freising, Germany | Vicar Apostolic Emeritus |
| 77.0 | Died | Vicente José Soto Valcárce † | Bishop of Valladolid, Spain |
| 18 Feb | 53.3 | Died | Joaquim da Souza Saraiva, C.M. † | Vicar Apostolic of Northern Chi-Li {Ce-Li Settentrionale} o Pe-Kin, China |
| 23 Feb | | Appointed | Patrick MacNicholas † | Bishop of Achonry, Ireland |
| Born | Antonio Maria Pettinari, O.F.M. † | Fano | Archbishop Emeritus of Urbino, Italy |
| Mar | 35.0 | Appointed | Francesco Serra Casano † | Titular Archbishop of Nicaea | Cardinal, Archbishop of Capua, Italy |
| 1 Mar | 48.6 | Appointed | Karl Kajetan Graf von Gaisruck (Gaysruck) † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 2 Mar | | Born | Ramón Camacho y García † | Etzatlán | Bishop of Querétaro, Querétaro, México |
| 3 Mar | | Died | Gennaro Carelli † | Bishop of Conversano, Italy |
| 4 Mar | 23.4 | Ordained Priest | William Placid Morris, O.S.B. † | Priest of Order of Saint Benedict | Vicar Apostolic Emeritus of Cape of Good Hope, Western District {Capo di Buona Speranza, Distretto Occidentale}, South Africa |
| Born | Tobias Mullen † | Urney, Ireland | Bishop Emeritus of Erie, Pennsylvania, USA |
| 7 Mar | 30.8 | Ordained Priest | Antônio Ferreira Viçoso, C.M. † | Priest of Congregation of the Mission | Bishop of Mariana, Brazil |
| 27.6 | Ordained Priest | Anton Frenzel † | Priest of Wrocław, Poland | Auxiliary Bishop of Warmia, Poland |
| 9 Mar | | Born | Giorgio Schopper † | Pest | Bishop of Rožňava, Slovakia |
| 12 Mar | 22.9 | Ordained Priest | Adalbert Lidmansky † | Priest of Ceské Budĕjovice {Budweis}, Czech Republic | Bishop of Gurk, Austria |
| 35.1 | Ordained Bishop | Francesco Serra Casano † | Titular Archbishop of Nicaea | Cardinal, Archbishop of Capua, Italy |
| 14 Mar | | Appointed | Pier Camillo de Carolis † | Bishop of Città della Pieve, Italy |
| 16 Mar | 33.8 | Appointed | Alessandro d'Angennes † | Bishop of Alessandria (della Paglia), Italy | Archbishop of Vercelli, Italy |
| Born | St. Antoine-Marie-Nicolas Daveluy, M.E.P. † | Amiens, France | Coadjutor Vicar Apostolic of Corea |
| 69.0 | Appointed | Antonio Maria Doria Pamphilj † | Chamberlain (Camerlengo) of the College of Cardinals | Cardinal, Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} |
| 45.3 | Appointed | Giorgio Doria Pamphilj Landi † | Cardinal-Priest of S. Cecilia | Cardinal, Prefect of the Congregation of Rites |
| 59.1 | Appointed | Diego Antonio Navarro Martín de Villodras † | Archbishop of La Plata o Charcas, Bolivia |
| 64.7 | Appointed | Giovanni-Antonio Niccola (Nicola) † | Bishop of Alba (Pompea), Italy |
| 61.2 | Appointed | Antonio Pérez Minayo † | Bishop of Almería, Spain |
| 47.6 | Appointed | Domingo de Silos Santiago Apollinario Moreno, O.S.B. † | Apostolic Administrator of Caracas, Santiago de Venezuela | Bishop of Cádiz, Spain |
| 47.6 | Appointed | Domingo de Silos Santiago Apollinario Moreno, O.S.B. † | Titular Bishop of Canatha | Bishop of Cádiz, Spain |
| Born | Kazimierz Józef Wnorowski † | Lenczyca | Bishop of Lublin, Poland |
| 17 Mar | | Born | Giuseppe Maria Maragioglio, O.F.M. Cap. † | Salemi | Bishop of Patti, Italy |
| 21 Mar | 23.0 | Ordained Priest | Ignaz Feigerle † | Priest of Olomouc, Czech Republic | Bishop of Sankt Pölten, Austria |
| 26.5 | Ordained Priest | Jean-François Ollivier, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 22 Mar | 85.0 | Died | Fabrizio Cimino, C.Ss.R. † | Bishop of Oria, Italy |
| 23 Mar | 33.8 | Ordained Bishop | Alessandro d'Angennes † | Bishop of Alessandria (della Paglia), Italy | Archbishop of Vercelli, Italy |
| 24 Mar | 55.4 | Ordained Bishop | Antonio Faà di Bruno † | Bishop of Asti, Italy |
| 25 Mar | 62.2 | Appointed | Alessandro Tommasini † | Archbishop of Reggio Calabria, Italy |
| 28 Mar | 82.2 | Died | Pedro Benito Antonio Quevedo y Quintano † | Cardinal, Bishop of Orense, Spain |
| 29 Mar | 60.7 | Ordained Bishop | Jean-Joseph Audemar † | Titular Bishop of Adraa | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viêt Nam |
| 30 Mar | 33.9 | Appointed | Ivan (Jan) Snihurskyj (Snigurski) † | Bishop of Przemyśl (Ukrainian), Poland |
| 31 Mar | 64.0 | Died | Giuseppe Della Casa † | Bishop of Alatri, Italy |
| 3 Apr | | Born | José Manuel Orrego Pizarro † | La Ligua | Bishop Emeritus of La Serena, Chile |
| 5 Apr | 63.7 | Appointed | Francesco Maria de Luca † | Archbishop of Lanciano, Italy | Archbishop of Lanciano (e Ortona), Italy |
| Born | Luigi Mariotti † | Maceano | Bishop of Monte Feltre, Italy |
| 6 Apr | 53.4 | Appointed | Domenico Novi Ciavarria † | Bishop of Avellino-Frigento, Italy | Bishop of Avellino, Italy |
| 77.7 | Appointed | Francesco Saverio Gualtieri † | Bishop of Caserta, Italy |
| 62.3 | Appointed | Francesco Guidobono Cavalchini † | Cardinal-Deacon of S. Maria in Aquiro | Cardinal, Priest of Roma {Rome}, Italy |
| 62.3 | Elevated to Cardinal | Francesco Guidobono Cavalchini † | Cardinal, Priest of Roma {Rome}, Italy |
| 81.3 | Appointed | Kasimir Johann Baptist von Häffelin † | Cardinal-Priest of S. Sabina | Cardinal, Titular Bishop of Chersonesus in Creta |
| 81.3 | Elevated to Cardinal | Kasimir Johann Baptist von Häffelin † | Cardinal, Titular Bishop of Chersonesus in Creta |
| 72.4 | Confirmed | Franz Karl Joseph Fürst von Hohenlohe-Waldenburg-Schillingsfürst † | Bishop of Augsburg, Germany |
| 37.8 | Appointed | Salvatore Lettieri † | Bishop of Castellaneta, Italy | Bishop of Nardò, Italy |
| Appointed | Domenico Narni Mancinelli † | Archbishop of Cosenza, Italy | Bishop of Caserta, Italy |
| 60.6 | Appointed | Girolano Manieri † | Bishop of L’Aquila, Italy |
| 72.3 | Appointed | Andrea Mansi † | Archbishop of Otranto, Italy |
| 68.3 | Appointed | Baldassare Mormile, C.R. † | Archbishop of Capua, Italy |
| Appointed | Andrea Portanova † | Bishop of Lucera, Italy |
| 61.0 | Appointed | Fabrizio Sceberras Testaferrata † | Cardinal-Priest of S. Pudenziana | Cardinal, Bishop of Senigallia, Italy |
| 61.0 | Appointed | Fabrizio Sceberras Testaferrata † | Cardinal, Bishop of Senigallia, Italy |
| 61.0 | Elevated to Cardinal | Fabrizio Sceberras Testaferrata † | Cardinal, Bishop of Senigallia, Italy |
| 77.4 | Confirmed | Joseph Graf von Stubenberg † | Archbishop of Bamberg, Germany |
| Appointed | Bartolomeo Varrone † | Bishop of Sessa Aurunca, Italy |
| 9 Apr | | Born | Luigi Celestino Spelta, O.F.M. † | Piemonte, Italy | Vicar Apostolic of Hupeh {Hu-Pè}, China |
| 10 Apr | 53.3 | Died | Giuseppe Bonventura Berardi, O.F.M. Conv. † | Bishop of Foreign Diocese |
| 12 Apr | | Born | Michael Heiss † | Pfahldorf, Germany | Archbishop of Milwaukee, Wisconsin, USA |
| 47.3 | Ordained Bishop | Edward Kernan † | Coadjutor Bishop of Clogher, Ireland | Bishop |
| 15 Apr | | Born | John MacEvilly † | Louisburgh | Archbishop of Tuam, Ireland |
| 23 Apr | 97.2 | Died | Jean-Armand de Bessuéjouls Roquelaure † | Archbishop Emeritus of Mechelen, Belgium |
| 80.9 | Died | Alexandre da Sagrada Familia Ferreira da Silva, O.F.M. † | Bishop of Angra, Portugal |
| 9 May | | Born | Robert Cornthwaite † | Preston | Bishop of Leeds, England, Great Britain |
| 14 May | | Born | Alessio Maria Filippi, O.F.M. † | Modena, Italy | Vicar Apostolic of Southwestern Hupeh {Hu-Pè Occiduo-Meridionale}, China |
| 15 May | | Born | Paolo Micallef (Micaleff), O.S.A. † | Malta | Archbishop of Pisa, Italy |
| 16 May | 24.6 | Ordained Priest | Denis-Auguste Affre † | Priest | Archbishop of Paris, France |
| 48.8 | Confirmed | Karl Kajetan Graf von Gaisruck (Gaysruck) † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 23.6 | Ordained Priest | Jean-Nicaise Gros † | Priest | Bishop of Versailles, France |
| 24.4 | Ordained Priest | Jean-Jacques-Marie-Antoine Guerrin † | Priest | Bishop of Langres, France |
| 22.7 | Ordained Priest | Michael Portier † | Priest of Saint Louis, Missouri, USA | Bishop of Mobile, Alabama, USA |
| 17 May | | Born | Michael Flannery † | Scariff | Bishop of Killaloe, Ireland |
| Ordained Bishop | Patrick MacNicholas † | Bishop of Achonry, Ireland |
| 20 May | 70.3 | Died | Francisco Javier Mier Campillo † | Bishop Emeritus of Almería, Spain |
| 22 May | | Born | Francesco Converti, O.F.M. † | Amendolara | Archbishop of Reggio Calabria, Italy |
| 25 May | 49.1 | Appointed | Anselmo Basilici † | Bishop of Nepi e Sutri, Italy |
| 72.5 | Confirmed | Matthäus Georg von Chandelle † | Bishop of Speyer, Germany |
| 40.3 | Appointed | Michele Basilio Clari (Clary), O.S.B. † | Bishop of Catanzaro, Italy | Archbishop of Bari (-Canosa), Italy |
| Appointed | Nicola Coppola † | Archbishop of Bari (-Canosa), Italy | Bishop of Nola, Italy |
| 56.4 | Appointed | Francesco-Saverio Domeniconi † | Bishop of Alatri, Italy |
| 57.3 | Confirmed | Lothar Anselm Freiherr von Gebsattel † | Archbishop of München und Freising {Munich}, Germany |
| 54.4 | Appointed | Carlo Monti † | Bishop of Cagli, Italy | Bishop of Cagli e Pergola, Italy |
| 63.4 | Appointed | Gaudenzio Patrignani, O.F.M. † | Bishop of Ferentino, Italy |
| 61.9 | Appointed | Joseph Chrysostomus Pauer † | Titular Bishop of the Titular See | Bishop of Sankt Pölten, Austria |
| 59.4 | Appointed | Domenico Ricciardone † | Bishop of Penne-Atri, Italy |
| Appointed | Michele Ruopoli † | Bishop of Isernia, Italy |
| 64.3 | Appointed | Giovanni Francesco Toppia † | Bishop of Vigevano, Italy |
| 68.8 | Appointed | Isaia Volpe (Volpi), O.F.M. Cap. † | Bishop of Bobbio, Italy |
| 26 May | 66.3 | Appointed | Antonio Maria Nappi † | Bishop of Ascoli Satriano, Italy | Bishop of Ascoli Satriano e Cerignola, Italy |
| 30 May | 23.6 | Ordained Priest | Ignazio Giovanni Cadolino † | Priest | Cardinal, Archbishop of Ferrara, Italy |
| 31 May | 68.8 | Ordained Bishop | Isaia Volpe (Volpi), O.F.M. Cap. † | Bishop of Bobbio, Italy |
| Jun | | Appointed | Agostino Tommasi † | Bishop of Aversa, Italy |
| 3 Jun | | Born | Francisco Gainza Escobás, O.P. † | Logroño, Spain | Bishop of Nueva Caceres, Philippines |
| 6 Jun | 72.7 | Appointed | Remigio de La Santa y Ortega † | Bishop of Lérida, Spain |
| 7 Jun | 64.9 | Ordained Bishop | Giovanni-Antonio Niccola (Nicola) † | Bishop of Alba (Pompea), Italy |
| Ordained Bishop | Adam Michal Prażmowski † | Bishop of Płock, Poland |
| 10 Jun | | Born | Stanislao Eula † | Mondovi | Bishop of Novara, Italy |
| 13 Jun | | Installed | Pier Camillo de Carolis † | Bishop of Città della Pieve, Italy |
| 14 Jun | 26.2 | Ordained Priest | Marie-Dominique-Auguste Sibour † | Priest | Archbishop of Paris, France |
| 16 Jun | | Born | José Manuel Palacios y López † | Burgos | Bishop of Mondoñedo, Spain |
| 18 Jun | | Born | Adamo Claessens † | Sittard | Vicar Apostolic of Batavia, Indonesia |
| 44.5 | Appointed | Edward Bede Slater, O.S.B. † | Vicar Apostolic of Cape of Good Hope {Capo de Buona Speranza}, South Africa | Vicar Apostolic Emeritus |
| 44.5 | Appointed | Edward Bede Slater, O.S.B. † | Titular Bishop of Ruspae | Vicar Apostolic Emeritus of Cape of Good Hope {Capo de Buona Speranza}, South Africa |
| 23 Jun | | Born | Agustín de Jesús Torres y Hernandez, C.M. † | Alfajayucan | Bishop of Tulancingo, Hidalgo, México |
| 24 Jun | 24.5 | Ordained Priest | Andreas Charvaz † | Priest | Archbishop of Genova, Italy |
| 25 Jun | 48.3 | Appointed | Camillo Alleva † | Bishop of Ugento, Italy | Archbishop of Salerno (-Acerno), Italy |
| 26 Jun | 59.7 | Appointed | Gaetano Maria Avarna † | Bishop of Nicosia, Italy |
| Appointed | Antonio Barretta, C.R. † | Archbishop of Brindisi, Italy |
| 66.4 | Appointed | Giuseppe d'Amante † | Bishop of Ischia, Italy |
| 51.2 | Appointed | Camillo Giovanni Rossi † | Bishop of San Severo, Italy | Bishop Emeritus |
| 28 Jun | | Appointed | Andrea de Lucia † | Bishop of Calvi e Teano, Italy |
| 44.5 | Ordained Bishop | Edward Bede Slater, O.S.B. † | Titular Bishop of Ruspae | Vicar Apostolic Emeritus of Cape of Good Hope {Capo de Buona Speranza}, South Africa |
| 29 Jun | | Born | Peter McIntyre † | Saint Peter | Bishop of Charlottetown, Prince Edward Island, Canada |
| 30 Jun | 71.5 | Died | Manoel de Almeida de Carvalho † | Bishop of Belém do Pará, Brazil |
| 69.6 | Appointed | Jan Klemens Golaszewski † | Bishop of Foreign Diocese |