| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 28.0 | Ordained Priest | Joseph VI Audu † | Priest | Patriarch of Babylon {Babilonia} (Chaldean), Iraq |
| 25.3 | Ordained Priest | Juan José de Aycinena y Piñol † | Priest of Guatemala | Auxiliary Bishop |
| Born | Indalecio Barreto † | | Bishop of Nueva Pamplona, Colombia |
| 23.0 | Ordained Priest | George Joseph Plunkett Browne † | Priest | Bishop of Elphin, Ireland |
| 59.7 | Appointed | Jozafat Bułhak, O.S.B.M. † | Bishop of Vilno (Ukrainian), Lithuania | Archbishop of Kyiv-Halyč {Kiev} (Ukrainian), Ukraine |
| 14.0 | Professed | Miguel Calderón, O.P. † | Member of Order of Friars Preachers | Vicar Apostolic of Fo-Kien, China |
| Born | Peter Francis Crinnon † | | Bishop of Hamilton, Ontario, Canada |
| Born | Annibale Fantoni, O.F.M. † | | Pro-Vicar Apostolic of Shantung {Scian-Ton} (Chan-tong), China |
| 59.7 | Appointed | Jerónimo Fernandez de Castro Delgado, O.SS.T. † | Minister General of Order of the Most Holy Trinity | Bishop of Albarracin, Spain |
| 53.3 | Incardinated | Bernhard Galura † | Priest of Brixen {Bressanone}, Italy | Bishop |
| 48.0 | Appointed | Paul Nicolas Guillier † | Prefect of French Guiana-Cayenne, Antilles |
| Died | Philippe Legrand † | Prefect of French Guiana-Cayenne, Antilles |
| 61.8 | Appointed | Lorenzo Litta † | Cardinal, Prefect of the Congregation for Residence of Bishops |
| Appointed | Verissimo Monteiro da Serra, C.M. † | Bishop of Peking [Beijing], China | Former Bishop-Elect |
| Born | Michele Morcaldi, O.S.B. † | | Abbot of Santissima Trinità di Cava de’ Tirreni, Italy |
| Appointed | Pasquiet, C.S.Sp. † | Prefect of Bourbon, Réunion |
| 48.1 | Resigned | Carlo Maria Pedicini † | Secretary of the Congregation of Examinations of Bishops | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| Died | Mathieu Simon † | Bishop of Amadiyah (Chaldean), Iraq |
| Jan | 64.5 | Appointed | Gabriello Maria Gravina, O.S.B. † | Prelate of Santa Lucia del Mela, Italy |
| 2 Jan | 80.0 | Died | Camillo de Simeoni † | Cardinal, Bishop of Nepi e Sutri, Italy |
| 4 Jan | | Born | Hilarión Alcázar, O.P. † | | Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viet Nam |
| 6 Jan | 51.9 | 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, C.O. † | Bishop Emeritus of Faro {Algarve}, Portugal |
| Born | Bl. Tommaso Reggio † | | 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 |
| 77.3 | Died | Joaquim de Santa Clara Brandão (Lopes), O.S.B. † | Archbishop of Évora, Portugal |
| 13 Jan | | Appointed | Aloisio Gandolfi, C.M. † | Vicar Apostolic of Syria, Egypt, Arabia, and Cyprus, Syria |
| 15 Jan | 75.0 | Died | Giovanni Francesco d’Alessandria † | Bishop of Catanzaro, Italy |
| 17 Jan | 85.1 | Died | Martin Takáts † | Auxiliary Bishop of Kalocsa, Hungary |
| 19 Jan | 81.6 | Died | Carlo Crivelli † | Cardinal, Cardinal-Priest of Santa Susanna |
| 26 Jan | 31.3 | Ordained Deacon | Ludwik Łętowski † | Deacon | Titular Bishop of Ioppe |
| 27 Jan | | Born | Jan Chryzostom Janiszenwski † | | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 31.3 | Ordained Priest | Ludwik Łętowski † | Priest | Titular Bishop of Ioppe |
| 30 Jan | | Born | Vincenzo Brancia † | | Bishop of Ugento, Italy |
| Born | Albert (Franz de Paula) Eder, O.S.B. † | | Archbishop of Salzburg, Austria |
| 31 Jan | 71.5 | Died | Richard O’Reilly † | Archbishop of Armagh, Ireland |
| Feb | 58.6 | Installed | Bernardo Martínez y Ocejo, O.C.D. † | Bishop of Sonora, México |
| 1 Feb | 78.8 | Died | Wojciech Górski † | Bishop of Kielce, Poland |
| 31.0 | 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 | 72.1 | Selected | Matthäus Georg von Chandelle † | Bishop of Speyer, Germany |
| 57.0 | Selected | Lothar Anselm von Gebsattel † | Archbishop of München und Freising {Munich}, Germany |
| 72.1 | Selected | Franz Karl Joseph von Hohenlohe-Waldenburg-Schillingsfürst † | Bishop of Augsburg, Germany |
| 77.2 | Selected | Joseph von Stubenberg † | Archbishop of Bamberg, Germany |
| 74.8 | Selected | Johann Nepomuk von Wolf † | Bishop of Regensburg, Germany |
| 6 Feb | 47.0 | Appointed | Edward Kernan † | Coadjutor Bishop of Clogher, Ireland | Bishop |
| 47.0 | Appointed | Edward Kernan † | Titular Bishop of Thabraca | Bishop of Clogher, Ireland |
| 8 Feb | 54.0 | Died | Luca Amici † | Bishop of Ferentino, Italy |
| 11 Feb | 92.3 | Died | José Francisco Miguel António de Mendonça Valdereis † | Cardinal, Patriarch of Lisboa {Lisbon}, Portugal |
| 14 Feb | | Born | Giovanni Acquaviva, C.O. † | | Bishop of Nusco, Italy |
| 23.2 | Ordained Priest | Louis-Charles Féron † | Priest | Bishop of Clermont, France |
| 15 Feb | 23.6 | Ordained Priest | János Nehiba † | Priest of Kalocsa, Hungary | Auxiliary Bishop |
| 59.5 | Ordained Bishop | Pedro Valera y Jiménez † | Archbishop of Santo Domingo, Dominican Republic |
| 16 Feb | 69.5 | Resigned | Joseph Jakob von Heckenstaller † | Vicar Apostolic of Freising, Germany | Vicar Apostolic Emeritus |
| 77.0 | Died | Vicente José Soto y Valcárce † | Bishop of Valladolid, Spain |
| 18 Feb | 53.3 | Died | Joaquim Sousa (Souza) Saraiva, C.M. † | Vicar Apostolic of Peking [Beijing], China | Bishop |
| 23 Feb | | Born | Antonio Maria Pettinari, O.F.M. Obs. † | | Archbishop Emeritus of Urbino, Italy |
| 1 Mar | 48.5 | Selected | Karl Kajetan von Gaisruck (Gaysruck) † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 2 Mar | 63.6 | Died | Santiago Bencomo y Rodríguez † | Bishop-Elect of Astorga, Spain |
| Born | Ramón Camacho y García † | | Bishop of Querétaro, México |
| 3 Mar | 77.1 | Died | Gennaro Carelli † | Bishop of Conversano, Italy |
| 4 Mar | | Born | Tobias Mullen † | | Bishop Emeritus of Erie, Pennsylvania, USA |
| 7 Mar | 24.0 | Ordained Deacon | Agustín Guillermo Charún Espinoza † | Deacon of Lima, Peru | Bishop of Trujillo, Peru |
| 22.5 | Ordained Priest | Marie-Auguste Fabre-des-Essarts † | Priest | Bishop of Blois, France |
| 30.8 | Ordained Priest | Antônio Ferreira Viçoso, C.M. † | Priest of Congregation of the Mission | Bishop of Mariana, Brazil |
| 27.5 | Ordained Priest | Anton Frenzel † | Priest of Wrocław (Breslau), Poland | Auxiliary Bishop of Warmia (Ermland), Poland |
| 22.0 | Ordained Deacon | Johannes von Geissel † | Deacon of Speyer, Germany | Cardinal, Archbishop of Köln {Cologne}, Germany |
| 8 Mar | 55.1 | Selected | Joseph Walland † | Archbishop of Gorizia e Gradisca, Italy |
| 9 Mar | | Born | Juraj Schopper † | | Bishop of Rožňava, Slovakia |
| 12 Mar | 22.9 | Ordained Priest | Adalbert Josef Lidmansky † | Priest of České Budĕjovice {Budweis}, Czechia | Bishop of Gurk, Austria |
| 16 Mar | 64.4 | Appointed | Pier Camillo de Carolis † | Bishop of Città della Pieve, Italy |
| 58.7 | Appointed | Giovanni Collaro † | Bishop of Tinos and Mykonos, Greece |
| 36.7 | Confirmed | Alessandro d’Angennes † | Bishop of Alessandria (della Paglia), Italy | Archbishop of Vercelli, Italy |
| 68.9 | 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 Santa Cecilia | Cardinal, Prefect of the Congregation of (Sacred) Rites |
| 55.3 | Confirmed | Antonio Faà di Bruno † | Bishop of Asti, Italy |
| 50.9 | Confirmed | Salvator Ferro de Berardis † | Bishop of Catania, Italy |
| 48.6 | Confirmed | Karl Kajetan von Gaisruck (Gaysruck) † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 64.7 | Appointed | Gabriello Maria Gravina, O.S.B. † | Titular Archbishop of Melitene | Prelate of Santa Lucia del Mela, Italy |
| 45.2 | Appointed | Federico Guarini, O.S.B. † | Titular Bishop of Nyssa | Bishop of Venosa, Italy |
| 67.3 | Appointed | Pedro Gutiérrez de Cos y Saavedra Seminario † | Bishop of Ayacucho o Huamanga (Guamanga), Peru | Bishop of Puerto Rico (Porto Rico) |
| 42.9 | Appointed | Giuseppe-Maria Lais † | Titular Bishop of Hippo Diarrhytus | Bishop of Ferentino, Italy |
| 60.7 | Confirmed | Andreas Maria de Maistre † | Bishop of Aosta, Italy | Bishop-Elect |
| 58.3 | Appointed | Giuseppe Crispino Mazzotti † | Bishop of Tivoli, Italy | Bishop of Cervia, Italy |
| 59.1 | Confirmed | Diego Antonio Navarro Martín de Villodras † | Archbishop of La Plata o Charcas, Bolivia |
| 64.6 | Confirmed | Giovanni-Antonio Niccola (Nicola) † | Bishop of Alba (Pompea), Italy |
| 61.1 | Appointed | Antonio Pérez Minayo † | Bishop of Almería, Spain |
| 50.2 | Appointed | Adam Michal Prażmowski † | Bishop of Płock, Poland |
| 35.0 | Appointed | Francesco Serra Cassano † | Titular Archbishop of Nicaea | Cardinal, Archbishop of Capua, Italy |
| 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 † | | Bishop of Lublin, Poland |
| 17 Mar | 48.3 | Appointed | Thomas Gillow † | Vicar Apostolic of Trinidad, Trinidad and Tobago, Antilles | Priest of Northern District, England, Great Britain |
| 48.3 | Appointed | Thomas Gillow † | Titular Bishop of Hypsus | Priest of Northern District, England, Great Britain |
| 38.2 | Appointed | Patrick MacNicholas † | Bishop of Achonry, Ireland |
| 18 Mar | 40.5 | Appointed | Luigi Maria Cardelli, O.F.M. Ref. † | Archbishop of Izmir (Smirne), Turkey | Archbishop Emeritus |
| Born | St. Antoine-Marie-Nicolas Daveluy, M.E.P. † | | Coadjutor Vicar Apostolic of Corea |
| 20 Mar | 58.3 | Selected | Antonio Barretta, C.R. † | Archbishop of Brindisi, Italy | Archbishop Emeritus |
| 69.7 | Selected | Francesco Saverino Buonomo † | Bishop of Gaeta, Italy |
| 53.3 | Selected | Domenico Novi Ciavarria † | Bishop of Avellino e Frigento, Italy | Bishop of Avellino, Italy |
| 65.0 | Selected | Domenico Antonio Cimaglia † | Bishop of Giovinazzo e Terlizzi, Italy | Bishop of Molfetta, Italy |
| 60.1 | Selected | Nicola Coppola, C.O. † | Archbishop of Bari (-Canosa), Italy | Bishop of Nola, Italy |
| 51.6 | Selected | Eustachio Dentice, C.R. † | Archbishop of Manfredonia (e Vieste), Italy |
| 63.6 | Selected | Francesco Maria de Luca, O.F.M. Obs. † | Archbishop of Lanciano, Italy | Archbishop of Lanciano (e Ortona), Italy |
| 63.8 | Selected | Giovanni Antonio de Fulgure, C.M. † | Archbishop of Taranto, Italy |
| 61.4 | Selected | Silvestro Granito † | Bishop of Cava (de’ Tirreni), Italy | Bishop of Cava e Sarno, Italy |
| 77.6 | Selected | Francesco Saverio Gualtieri † | Bishop of Caserta, Italy |
| 37.7 | Selected | Salvatore Lettieri † | Bishop of Castellaneta, Italy | Bishop of Nardò, Italy |
| 52.4 | Selected | Michelangelo Lupoli † | Archbishop of Conza e Campagna, Italy | Archbishop of Salerno (-Acerno), Italy |
| 45.9 | Selected | Domenico Narni Mancinelli † | Archbishop of Cosenza, Italy | Bishop of Caserta, Italy |
| 60.5 | Selected | Girolano Manieri † | Bishop of L’Aquila, Italy |
| 71.5 | Selected | Andrea Mansi, O.F.M. Disc. † | Archbishop of Otranto, Italy |
| 67.6 | Selected | Nicola Antonio Montiglia † | Bishop of Squillace, Italy | Bishop of Nicotera e Tropea, Italy |
| 68.2 | Selected | Baldassare Mormile, C.R. † | Archbishop of Capua, Italy |
| 66.1 | Selected | Antonio Maria Nappi † | Bishop of Ascoli Satriano (Puglia), Italy | Bishop of Ascoli Satriano e Cerignola, Italy |
| 58.9 | Selected | Andrea Portanova † | Bishop of Lucera, Italy |
| 54.7 | Selected | Carlo Puoti † | Archbishop of Rossano, Italy | Bishop of Alife, Italy |
| 59.2 | Selected | Domenico Ricciardone † | Bishop of Penne e Atri, Italy |
| 60.0 | Selected | Michele Ruopoli † | Bishop of Isernia, Italy |
| 65.3 | Selected | Domenico Russo † | Bishop of Ariano, Italy |
| 66.5 | Selected | Michele Spinelli, C.R. † | Archbishop of Sorrento, Italy |
| 54.4 | Selected | Francesco Felice Tiberi, C.O. † | Bishop of Valva e Sulmona, Italy |
| 65.1 | Selected | Alessandro Tommasini † | Archbishop of Reggio Calabria, Italy |
| 48.6 | Selected | Agostino Tommasi † | Bishop of Aversa, Italy |
| 59.3 | Selected | Bartolomeo Varrone † | Bishop of Sessa Aurunca, Italy |
| 21 Mar | 22.9 | Ordained Priest | Ignaz Feigerle † | Priest of Olomouc, Czechia | 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}, Viet Nam |
| 22 Mar | 84.9 | Died | Fabrizio Cimino, C.Ss.R. † | Bishop of Oria, Italy |
| 23 Mar | 64.5 | Ordained Bishop | Pier Camillo de Carolis † | Bishop of Città della Pieve, Italy |
| 36.7 | Ordained Bishop | Alessandro d’Angennes † | Bishop of Alessandria (della Paglia), Italy | Archbishop of Vercelli, Italy |
| 50.9 | Ordained Bishop | Salvator Ferro de Berardis † | Bishop of Catania, Italy |
| 35.0 | Ordained Bishop | Francesco Serra Cassano † | Titular Archbishop of Nicaea | Cardinal, Archbishop of Capua, Italy |
| Born | Joseph Sidney Woollett, S.J. † | | Vicar Apostolic Emeritus of Giamaica o Jamaica, Antilles |
| 24 Mar | 55.3 | Ordained Bishop | Antonio Faà di Bruno † | Bishop of Asti, Italy |
| 45.3 | Ordained Bishop | Federico Guarini, O.S.B. † | Titular Bishop of Nyssa | Bishop of Venosa, Italy |
| 25 Mar | 64.1 | Selected | Giovanni Francesco Toppia † | Bishop of Vigevano, Italy |
| 20.0 | Professed | Carmelo Valenti, C.Ss.R. † | Member of Congregation of the Most Holy Redeemer | Bishop of Mazara del Vallo, Italy |
| 28 Mar | 82.2 | Died | Pedro Benito Antonio Quevedo y Quintano † | Cardinal, Bishop of Orense, Spain |
| 29 Mar | 28.1 | Ordained Priest | Francisco de Paula León de Aguirre Velasco † | Priest | Former Bishop-Elect of La Paz, Bolivia |
| 60.7 | Ordained Bishop | Jean-Joseph Audemar † | Titular Bishop of Adraa | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 30 Mar | 33.8 | Appointed | Ivan (Jan) Snihurskyj (Snigurski) † | Bishop of Przemyśl, Sambor, et Sanok (Ukrainian), Poland |
| 31 Mar | 64.0 | Died | Giuseppe Della Casa † | Bishop of Alatri, Italy |