| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 35.4 | Ordained Priest | Rafael Andreu Guerrero † | Priest | Auxiliary Bishop of La Plata o Charcas, Bolivia |
| Born | Gregorio Bahadur † | Ancyrae | Bishop of Bursa (Bostra, Prusa) (Armenian), Turkey |
| 23.9 | Ordained Priest | José María de Jesús Belaunzarán y Ureña, O.F.M. † | Priest of Order of Friars Minor | Bishop Emeritus of Linares o Nueva León, Nuevo León, México |
| 55.4 | Died | Thaddaeus Josephus Bukaty † | Titular Bishop of Thespiae |
| 80.0 | Died | Giovanni Battista Crispi † | Archbishop of Naxos, Greece |
| 60.6 | Died | Aloysius Cusani † | Archbishop of Oristano, Italy |
| Died | José Alejandro de Egües y Villamar † | Bishop of Santa Marta, Colombia |
| 47.0 | Appointed | Estefan El-Khazen † | Bishop | Archbishop of Damas (Maronite), Syria |
| 47.0 | Ordained Bishop | Estefan El-Khazen † | Bishop | Archbishop of Damas (Maronite), Syria |
| 26.0 | Ordained Priest | Anton El-Khazen (Gazeno) † | Priest | Bishop of Baalbek (Maronite), Lebanon |
| 55.9 | Died | Franciscus de Lauria † | Bishop of Guardialfiera (Guardia), Italy |
| 63.8 | Died | Alejandro José de Ochoa y Morillo † | Bishop of La Paz, Bolivia |
| 69.2 | Died | Andreas Ország † | Auxiliary Bishop of Pécs, Hungary |
| 69.0 | Ordained Bishop | Manuel Nicolás Rojas de Argandoña † | Bishop of Santa Cruz de la Sierra, Bolivia |
| 77.8 | Died | José Maria Sisto e Brito, C.R. † | Bishop of Sora, Italy |
| 23.7 | Ordained Priest | José Jorge de Torres y Estans † | Priest | Bishop of Nueva Pamplona, Colombia |
| 23.4 | Ordained Priest | Félix Torres y Amat † | Priest | Bishop of Astorga, Spain |
| Born | Antin Zubko † | | Auxiliary Bishop of Foreign Diocese |
| 5 Jan | | Appointed | Jacobus Dillon † | Coadjutor Bishop of Raphoe, Ireland | Bishop of Kilmore, Ireland |
| Appointed | Jacobus Dillon † | Titular Bishop of Nilopolis | Bishop of Kilmore, Ireland |
| Appointed | Jacobus Ludovicus O’Donnell, O.F.M. † | Titular Bishop of Thyatira |
| 10 Jan | 24.0 | Ordained Priest | Giuseppe Maria Bozzi † | Priest | Bishop of Mantova, Italy |
| 17 Jan | 80.7 | Died | Francesco Zunica † | Archbishop of Acerenza e Matera, Italy |
| 19 Jan | | Born | Damián Gordo Sáez † | Cantalojas | Bishop of Tortosa, Spain |
| Born | Gaspare Grasselini, C.O. † | Palermo, Italy | Cardinal, Priest of Confederation of Oratorians of St. Philip Neri |
| 20 Jan | | Born | Jacques-Marie-Adrien-Césaire Mathieu † | Paris | Cardinal, Archbishop of Besançon, France |
| 21 Jan | 68.9 | Died | Tomás Lorenzana Butrón † | Bishop of Gerona, Spain |
| 22 Jan | 59.1 | Appointed | James Louis O’Donel, O.F.M. † | Vicar Apostolic of Newfoundland, Canada | Vicar Apostolic Emeritus |
| 25 Jan | | Born | Jakob Laurentz Studach † | Altstetten, Switzerland | Vicar Apostolic of Sweden |
| 26 Jan | 64.1 | Ordained Bishop | Jan Chrzciciel Albertrandi † | Titular Bishop of Zenopolis in Lycia | Auxiliary Bishop of Warszawa, Poland |
| 27 Jan | 89.4 | Died | Francesco Maria Banditi, C.R. † | Cardinal, Archbishop of Benevento, Italy |
| 29 Jan | | Born | Giovanni Renier † | Castello di Godego | Bishop of Belluno e Feltre, Italy |
| 5 Feb | | Born | Johannes von Geissel † | Gimmeldingen | Cardinal, Archbishop of Köln {Cologne}, Germany |
| 6 Feb | | Born | Adamus Wojtkiewicz † | Vilnae | Bishop of Minsk, Belarus |
| 10 Feb | 71.5 | Died | Agustín Lezo Palomeque † | Archbishop of Zaragoza, Spain |
| 12 Feb | 50.5 | Selected | Ignatius Cajetanus von Buset zu Faistenberg † | Bishop of Trieste, Italy |
| 14 Feb | 36.8 | Ordained Bishop | Anton Anhelovych (Angellowicz) † | Bishop of Przemyśl, Sambor, et Sanok (Ruthenian), Poland | Archbishop of Lviv (Ukrainian), Ukraine |
| 18 Feb | | Born | Vincenso Santucci † | Gorga, Italy | Cardinal, Prefect of the Congregation for Studies |
| 19 Feb | 23.2 | Ordained Priest | Giovanni Giuseppe Cappellari † | Priest | Bishop of Vicenza, Italy |
| 20 Feb | 27.1 | Ordained Priest | Epiphanius Maria Turrisi † | Priest | Titular Bishop of Flavias |
| 21 Feb | 46.2 | Ordained Bishop | Francisco Javier de Lizana y Beaumont † | Titular Bishop of Thaumacus | Archbishop of México, Federal District |
| 60.5 | Ordained Bishop | Antonio Ramón de Espinosa y Lorenzo, O.P. † | Bishop of Mérida, Venezuela |
| 24 Feb | 69.4 | Died | Karl Aloys von Königsegg und Rothenfels † | Auxiliary Bishop of Köln {Cologne}, Germany |
| Born | Charles-Thomas Thibault † | Beynes | Bishop of Montpellier, France |
| 4 Mar | 64.9 | Died | Filippo Trenta † | Bishop of Foligno, Italy |
| 5 Mar | | Born | Gaetano Rossini † | Bari | Bishop of Molfetta-Giovinazzo-Terlizzi, Italy |
| 6 Mar | | Born | Jean-Irénée Depéry † | Challex | Bishop of Gap, France |
| 8 Mar | | Born | Jean-Joseph-Marie-Eugène de Jerphanion † | Le Puy-en-Velay | Archbishop of Albi, France |
| Born | Nikolaus von Weis † | Rimlingen | Bishop of Speyer, Germany |
| 12 Mar | 26.0 | Ordained Priest | Antonio Baldini † | Priest | Titular Archbishop of Neocaesarea in Ponto |
| 23.3 | Ordained Priest | Federico Guarini, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Venosa, Italy |
| 22.8 | Ordained Priest | Laurentius Serafini, O.F.M. Cap. † | Priest of Order of Friars Minor Capuchin | Titular Bishop of Corycus |
| 16 Mar | | Born | Fidèle Sutter, O.F.M. Cap. † | Ferrara, Italy | Vicar Apostolic Emeritus of Tunis, Tunisia |
| 17 Mar | 61.1 | Installed | Ignacy Błażej Franciszek Krasicki † | Archbishop of Gniezno, Poland |
| 19 Mar | 53.6 | Installed | Mateus de Abreu Pereira † | Bishop of São Paulo, Brazil |
| 23 Mar | | Born | St. Laurent-Joseph-Marius Imbert, M.E.P. † | Marignane, France | Vicar Apostolic of Corea |
| 24 Mar | 72.8 | Died | Antonio Caballero y Góngora † | Bishop of Córdoba, Spain |
| 26 Mar | 23.2 | Ordained Priest | Bonifaz Kaspar von Urban † | Priest of Order of St. Augustine | Archbishop of Bamberg, Germany |
| 30 Mar | 65.7 | Died | Nicola Colonna di Stigliano † | Cardinal, Cardinal-Priest of Santo Stefano al Monte Celio |
| Born | Vital-Honoré Tirmarche † | Abbeville | Titular Bishop of Adrasus |
| 31 Mar | 77.5 | Died | Carlo Zangheri † | Bishop of Assisi, Italy |
| 3 Apr | 24.0 | Ordained Priest | Franz Ferdinand (Johann Franz) Fritz, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Hildesheim, Germany |
| 10 Apr | 63.7 | Installed | Johann Karl von Hohenzollern-Hechingen † | Bishop of Warmia (Ermland), Poland |
| 45.3 | Ordained Bishop | Charles La Mothe, M.E.P. † | Titular Bishop of Castoria | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 11 Apr | 73.5 | Died | Stephan Alexander Würdtwein † | Auxiliary Bishop of Worms, Germany |
| 12 Apr | 56.3 | Died | Philippe Gemayel † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon | Bishop |
| 14 Apr | | Born | Giovanni Corti † | Pomerio | Bishop of Mantova, Italy |
| 18 Apr | | Born | Dominique-Augustin Dufêtre † | Lyon | Bishop of Nevers, France |
| 26 Apr | | Born | Jean Sarrabeyrouse (Sarebayrouze) † | Merville | Auxiliary Bishop of Ajaccio, France |
| 71.3 | Died | Blas Manuel Sobrino y Minayo † | Bishop of Trujillo, Peru |
| 28 Apr | 70.9 | Died | Angelo Maria Durini † | Cardinal, Titular Archbishop of Ancyra |
| 18.9 | Professed | Ângelo de Nossa Senhora da Boa-Morte, O.F.M. † | Member of Order of Friars Minor | Bishop of Elvas, Portugal |
| 36.1 | Selected | Youssef Tian (Tyen) † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon | Patriarch Emeritus |
| May | 90.3 | Died | Thomas del Pozzo † | Titular Bishop of Antipatris |
| 1 May | 55.2 | Ordained Bishop | Lourenço Correa de Sá e Benevides † | Bishop of Porto, Portugal |
| 2 May | | Born | Thomas Joseph Brown, O.S.B. † | Bath | Bishop of Newport and Menevia, Wales, Great Britain |
| 75.9 | Died | Juan García Ruiz, O.S.A. † | Bishop of Nueva Caceres, Philippines |
| 64.2 | Died | Wenzel Kobaltz † | Prefect of Meißen (Meissen) {Lusazia o Lausitz; Sassonia}, Germany |
| Died | Juan Ruiz de San Agustín, O.A.R. † | Bishop of Nueva Segovia, Philippines |
| 6 May | 80.3 | Died | Jean de la Croix de Castries-Mairargues † | Bishop of Vabres, France |
| 14 May | | Born | João d’Aguiar † | Evora | Bishop Emeritus of Bragança e Miranda, Portugal |
| 16 May | 59.2 | Died | Vittorio Maria Baldassare Gaetano Costa d’Arignano † | Cardinal, Archbishop of Torino {Turin}, Italy |
| 17 May | | Born | Martinus Johannes Niewindt † | Amstelodami | Vicar Apostolic of Curaçao, Netherlands Antilles, Antilles |
| 19 May | 67.5 | Died | Francesco Paolo Mandarani † | Bishop of Nicastro, Italy |
| 20 May | | Born | Clément Bonnand, M.E.P. † | Saint-Maurice-sur-Dargoire, France | Vicar Apostolic of Pondicherry, India |
| 21 May | 22.8 | Ordained Priest | Francesco Maria Cipriani, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Veroli, Italy |
| 22.8 | Ordained Deacon | Ignatz Anton Demeter † | Deacon of Augsburg, Germany | Archbishop of Freiburg im Breisgau, Germany |
| 25.0 | Ordained Priest | Johann Jakob Humann † | Priest of Mainz, Germany | Bishop of Mainz, Germany |
| 22 May | 55.2 | Ordained Bishop | Joseph-Barthélemy Menocchio, O.S.A. † | Titular Bishop of Hippo Diarrhytus | Titular Bishop of Porphyreon |
| 26 May | 69.1 | Installed | Francisco Gabriel de Olivares y Benito † | Bishop of Durango, México |
| 28 May | | Born | Michele Navazio † | Melfi | Bishop of L’Aquila, Italy |
| 30 May | 66.4 | Died | Diego de Jesus Jardim, O.S.H. † | Bishop of Elvas, Portugal |
| 1 Jun | | Born | François-Victor Rivet † | Saint-Germain-en-Laye | Bishop of Dijon, France |
| 10 Jun | | Appointed | Iosephus Maria Tobia, O.F.M. Conv. † | Coadjutor Bishop of Tinos, Greece | Bishop of Santorini {Thira}, Greece |
| Appointed | Iosephus Maria Tobia, O.F.M. Conv. † | Titular Bishop of Anthedon | Bishop of Santorini {Thira}, Greece |
| 19 Jun | | Died | Denis Conway † | Bishop of Limerick, Ireland |
| 43.8 | Appointed | Francesco Maria Giampè † | Bishop of Assisi, Italy |
| 50.3 | Succeeded | John Young † | Bishop of Limerick, Ireland |
| 20 Jun | | Born | Luigi Amat di San Filipo e Sorso † | Sinnai, Italy | Cardinal, Official of the Roman Curia - Other |
| 21 Jun | 74.5 | Died | Louis-Jérême de Suffren de Saint-Tropez † | Bishop of Nevers, France |
| 22 Jun | 54.9 | Appointed | José da Costa e Torres † | Bishop of Elvas, Portugal | Archbishop of Braga, Portugal |
| Born | Julianus Maria Hillereau † | Saint Philbert de Bouaine | Titular Archbishop of Petra in Palaestina |
| 23 Jun | 71.5 | Died | Martinus Chyczewski † | Auxiliary Bishop Emeritus of Włocławek (Kujawy, Kalisze), Poland |
| 24 Jun | | Born | Rafael Barišić, O.F.M. † | Očevija, Bosnia and Herzegovina | Vicar Apostolic Emeritus of Herzegovina |
| 26 Jun | | Ordained Bishop | Iosephus Maria Tobia, O.F.M. Conv. † | Titular Bishop of Anthedon | Bishop of Santorini {Thira}, Greece |
| 27 Jun | 58.5 | Appointed | Alessandro Alessandretti † | Bishop of Macerata e Tolentino, Italy | Bishop Emeritus |
| 57.8 | Appointed | Agustín Ayestarán Landa † | Bishop of Córdoba, Spain |
| 67.6 | Appointed | Angelicus (Bartholomaeus) Benincasa, O.F.M. Cap. † | Archbishop of Camerino, Italy |
| 51.1 | Appointed | Carlo Benigni † | Bishop of Terni, Italy |
| 50.9 | Confirmed | Ignatius Cajetanus von Buset zu Faistenberg † | Bishop of Trieste, Italy |
| 48.9 | Appointed | Camillo Campanelli † | Titular Archbishop of Athenae | Bishop of Perugia, Italy |
| 53.0 | Appointed | Antonio David † | Bishop of Narni, Italy |
| 43.9 | Appointed | Jean-Baptiste d’Odet † | Bishop of Lausanne, Switzerland |
| 67.7 | Appointed | Pius Bonifacius Fassati, O.P. † | Bishop of Tortona, Italy | Bishop Emeritus |
| 38.7 | Appointed | Teresio Maria Carlo Vittorio Ferrero della Marmora † | Bishop of Casale Monferrato, Italy | Cardinal, Bishop Emeritus of Saluzzo, Italy |
| 56.5 | Confirmed | Philippe Gemayel † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon | Bishop |
| 66.7 | Appointed | Jerónimo Gómez de Liñán de la Borda † | Bishop of Cartagena, Colombia |
| Born | Petrus Franciscus Krejčí † | Brzeznitz | Auxiliary Bishop of Praha {Prague}, Czech Republic |
| 42.7 | Appointed | Ferdinandus Lomellino, O.S.B. † | Titular Bishop of Antipatris |
| 68.7 | Appointed | Francisco Matienzo † | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 44.2 | Appointed | Vincenzo Maria Mossi de Morano † | Bishop of Alessandria (della Paglia), Italy | Bishop Emeritus |
| 56.9 | Appointed | Santiago Pérez Arenillas † | Bishop of Gerona, Spain |
| 61.2 | Appointed | Georgius Połubiński † | Auxiliary Bishop of Vilnius, Lithuania |
| 61.2 | Appointed | Georgius Połubiński † | Titular Bishop of Loryma | Auxiliary Bishop of Vilnius, Lithuania |
| 52.0 | Appointed | Franciscus Petrus Raccamarich † | Bishop of Kotor (Cattaro), Montenegro | Bishop of Ossero (Osor), Croatia |
| 35.5 | Appointed | Antonio Angelo Radovani † | Bishop of Sapë, Albania | Bishop Emeritus |
| Confirmed | Cyril VII (François) Siaj (Siage) † | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| Confirmed | Cyril VII (François) Siaj (Siage) † | Bishop of Damas (Melkite Greek), Syria | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 60.3 | Appointed | Mihajlo Mate Spalatin † | Bishop of Šibenik (Knin), Croatia |
| 57.3 | Appointed | Domenico Spinucci † | Cardinal, Archbishop of Benevento, Italy |
| 53.2 | Appointed | Onufry Kajetan Szembek † | Coadjutor Bishop of Płock, Poland | Bishop |
| 53.2 | Appointed | Onufry Kajetan Szembek † | Titular Bishop of Ptolemais in Thebaide | Bishop of Płock, Poland |
| 58.7 | Appointed | Antonio Tavira Almazán † | Bishop of Osma, Spain | Bishop of Salamanca, Spain |
| 46.8 | Appointed | Manuel Verdugo Albiturría † | Bishop of Islas Canarias {Canary Islands}, Spain |
| 28 Jun | 47.0 | Appointed | Marco Antonio Moscardini † | Bishop of Foligno, Italy |