| Date | Age | Event | Bishop | Title | Current Title | 
| unknown |  | Appointed | Paul Acderian (Etarian) † | Bishop of Iskanderiya {Alexandria} (Armenian), Egypt | 
 | Ordained Bishop | Paul Acderian (Etarian) † | Bishop of Iskanderiya {Alexandria} (Armenian), Egypt | 
| 22.7 | Ordained Priest | Luigi Maria (Tommaso Francesco) Bilio, B. † | Priest of Clerics Regular of St. Paul | Cardinal, Secretary of the Congregation for Universal Inquisition | 
| 51.6 | Appointed | Giacomo Luigi Brignole † | Cardinal, Prefect of the Congregation of the Index | 
| 32.2 | Ordained Priest | Carlos Cuarteroni Fernández, O.SS.T. † | Priest of Order of the Most Holy Trinity | Prefect of Labuan e Borneo, Malaysia | 
| 27.2 | Ordained Priest | Cesare Dalceggio, O.F.M. † | Priest of Order of Friars Minor | Pro-Vicar Apostolic of Northwestern Hupeh {Hu-Pè Occiduo-Settentrionale}, China | 
| 26.0 | Ordained Priest | John Dalton, O.F.M. Ref. † | Priest of Order of Reformed Friars Minor | Bishop of Harbour Grace, Newfoundland, Canada | 
| 23.1 | Ordained Priest | Edmond Alfred Dardel, O.F.M. Cap. † | Priest | Vicar Apostolic of Seychelles | 
 | Appointed | Mélèce Fendé † | Bishop of Damas (Melkite Greek), Syria | Bishop of Baalbek (Melkite Greek), Lebanon | 
| 50.8 | Died | Gregorio Maria Fistilli † | Bishop Emeritus of Capaccio, Italy | 
| 44.5 | Resigned | José Maria González Rúbio, O.F.M. † | Administrator of California (Two Californias, Both Californias), México | Former Administrator of Monterey, California, USA | 
 | Born | Sevère-Samuel Lahdo † |  | 
| 21.8 | Ordained Priest | Raffaele Monaco La Valletta † | Priest | Cardinal, Prefect of the Congregation of Ceremonies | 
| 41.9 | Ordained Bishop | Giuseppe-Maria Mucedola † | Bishop of Conversano, Italy | 
| 75.2 | Died | Miguel Orozco † | Bishop-Elect of La Paz, Bolivia | 
| 29.7 | Appointed | Julien Rabin, M.E.P. † | Prefect of Lhassa, China | Prefect Emeritus | 
| 86.2 | Died | Antonio Sánchez Matas, O.F.M. Obs. † | Bishop Emeritus of La Paz, Bolivia | 
| 65.9 | Ordained Bishop | Antonio Michele Vaglio † | Bishop of Venosa, Italy | 
| Jan | 25.8 | Ordained Priest | Gustav Adolf von Hohenlohe-Schillingsfürst † | Priest | Cardinal, Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} | 
| 1 Jan | 23.9 | Ordained Priest | Manuel Canuto Restrepo y Villegas † | Priest | Bishop Emeritus of Pasto, Colombia | 
 | Born | Joseph Dumáni, B.S. † |  | Bishop of Tripoli del Libano (Melkite Greek) | 
| 3 Jan |  | Born | Fidel Olivas Escudero † |  | Bishop of Ayacucho o Huamanga (Guamanga), Peru | 
| 6 Jan | 71.0 | Died | Angelo Maria Scanzano † | Bishop of Castellammare di Stabia, Italy | 
| 7 Jan | 81.4 | Died | Filippo Cattani † | Bishop of Reggio Emilia, Italy | 
| 48.2 | Ordained Bishop | St. Giustino Sebastiano Pasquale de Jacobis, C.M. † | Titular Bishop of Nilopolis | Vicar Apostolic of Abyssinia, Ethiopia | 
| 11 Jan |  | Born | Joseph Rumeau † |  | Bishop of Angers, France | 
| 12 Jan |  | Born | Pascal Campana, C.S.Sp. † |  | Prefect of Lower Congo in Cubango, Angola | 
| 14 Jan |  | Born | Ernesto Angiulli † |  | Auxiliary Bishop of Napoli {Naples}, Italy | 
| 45.0 | Ordained Bishop | Jean-Rémi Bessieux, C.S.Sp. † | Titular Bishop of Callipolis | Vicar Apostolic of Two Guineas {Des Deux Guinées}, Gabon | 
| 37.1 | Ordained Bishop | Jacques-Maurice des Landes d’Aussac de Saint Palais † | Bishop of Vincennes, Indiana, USA | 
| 57.1 | Ordained Bishop | José María Yáñez de Montenegro † | Bishop of Cochabamba, Bolivia | 
| 17 Jan | 50.9 | Selected | Jean-Antoine-Marie Foulquier † | Bishop of Mende, France | Bishop Emeritus | 
| 46.0 | Died | Edward Maginn † | Coadjutor Bishop of Derry, Ireland | 
| 18 Jan | 67.8 | Died | Juan Antonio Ignacio Fernández Peña y Angulo † | Archbishop of Caracas, Santiago de Venezuela | 
| 19 Jan | 33.5 | Died | David Walsh † | Bishop of Cloyne and Ross, Ireland | 
| 21 Jan | 22.5 | Ordained Priest | Carlo Bertuzzi † | Priest | Bishop Emeritus of Foligno, Italy | 
| 22 Jan | 29.8 | Professed | Julien Rabin, M.E.P. † | Priest of La Société des Missions Etrangères | Prefect Emeritus of Lhassa, China | 
| 23 Jan |  | Born | Constant-Jean-Baptiste Prodhomme, M.E.P. † |  | Vicar Apostolic of Laos | 
| 26 Jan | 52.2 | Died | Filippo de’ Conti Curoli † | Bishop of Rieti, Italy | 
| 28 Jan | 58.8 | Ordained Bishop | Vicente Barreiro y Pérez, O.E.S.A. † | Bishop of Nueva Segovia, Philippines | 
| 64.6 | Died | António de Santo Ilídio da Fonseca e Silva, O.S.B. † | Priest of Order of Saint Benedict | 
| 62.0 | Ordained Bishop | Manuel Grijalvo y Mínguez, O.E.S.A. † | Bishop of Nueva Caceres, Philippines | 
| 37.9 | Ordained Bishop | Antonino Merciai, O.P. † | Titular Archbishop of Theodosiopolis | Apostolic Delegate to Mesopotamia, Kurdistan, and Lesser Armenia, Iraq | 
 | Born | Denis Joseph O’Connell † |  | Bishop Emeritus of Richmond, Virginia, USA | 
| 29 Jan | 51.3 | Selected | Joseph Othmar von Rauscher † | Bishop of Seckau, Austria | Cardinal, Archbishop of Wien {Vienna}, Austria | 
| 31 Jan | 46.8 | Appointed | Joannes van Breugel † | Coadjutor Vicar Apostolic of Breda, Netherlands | 
| 46.8 | Appointed | Joannes van Breugel † | Titular Bishop of Adrana | Coadjutor Vicar Apostolic of Breda, Netherlands | 
| 72.9 | Died | Jean-François de Hercé † | Bishop Emeritus of Nantes, France | 
| Feb | 50.9 | Died | Nicola Abrate † | Apostolic Administrator of Terni, Italy | 
| 64.1 | Installed | José María Luciano Becerra y Jiménez † | Bishop of Chiapas (Ciudad Real de Chiapas), México | Bishop of Tlaxcala (Puebla de los Angeles), México | 
| 3 Feb |  | Born | Domenico Mannaioli † |  | Bishop Emeritus of Montefiascone, Italy | 
| 4 Feb | 48.5 | Ordained Bishop | Justo Donoso Vivanco † | Bishop of San Carlos de Ancud, Chile | Bishop of La Serena, Chile | 
 | Born | Jacques-Jean Gely † |  | Bishop of Mende, France | 
| 39.5 | Ordained Bishop | Antonio Magrini † | Bishop of Terni, Italy | Bishop of Forli, Italy | 
| 5 Feb |  | Born | Anthony Gaughren, O.M.I. † |  | Vicar Apostolic of Kimberley in Orange, South Africa | 
 | Born | Francesco Vento † |  | Bishop of Aversa, Italy | 
| 7 Feb | 60.2 | Selected | Jean-Marie Mioland † | Coadjutor Archbishop of Toulouse (-Narbonne), France | Archbishop | 
| 8 Feb |  | Born | Aristide Cavallari † |  | Cardinal, Patriarch of Venezia {Venice}, Italy | 
| 10 Feb | 50.6 | Selected | Pier Giuseppe Vaggi, O.F.M. Cap. † | Bishop of Bobbio, Italy | 
| 11 Feb | 53.8 | Ordained Bishop | James Oliver Van de Velde, S.J. † | Bishop of Chicago, Illinois, USA | Bishop of Natchez, Mississippi, USA | 
| 14 Feb | 48.0 | Appointed | John Larkin, S.J. † | Bishop of Toronto, Ontario, Canada | Priest of Society of Jesus | 
| 15 Feb | 21.0 | Solemn Vows | Thomas-Marie Gentili, O.P. † | Member of Order of Friars Preachers | Coadjutor Vicar Apostolic Emeritus of Fo-Kien, China | 
| 16 Feb | 71.6 | Died | Giovanni Battista Rossi † | Bishop of Pistoia e Prato, Italy | 
| 17 Feb | 57.0 | Died | Daniel-Victor Manglard † | Bishop of Saint-Dié, France | 
| 18 Feb | 72.3 | Died | Thomas Walsh † | Vicar Apostolic of London District, England, Great Britain | 
| 46.5 | Succeeded | Nicholas Patrick Stephen (Nicolás Patricio Esteban) Wiseman † | Vicar Apostolic of London District, England, Great Britain | Cardinal, Archbishop of Westminster, England, Great Britain | 
| 20 Feb | 33.8 | Ordained Bishop | Gregorio (Michael) Ata (Atta) † | Archbishop of Homs (-Hama-Jabrud) (Melkite Greek), Syria | 
| 23 Feb | 50.5 | Selected | Louis-Antoine de Salinis † | Bishop of Amiens, France | Archbishop of Auch, France | 
| 24 Feb | 43.8 | Appointed | 
Étienne-Raymond Albrand, M.E.P. † | Titular Bishop of Sura | Vicar Apostolic of Kuiceu (Kweichow), China | 
| 48.2 | Ordained Bishop | Marie-Julien Meirieu † | Bishop of Digne, France | Bishop Emeritus | 
| 46.4 | Ordained Bishop | Sébastin-Théophille Neyret, M.S.F.S. † | Titular Bishop of Olena | Vicar Apostolic of Vizagapatnam, India | 
| 78.5 | Died | Jules-François de Simony † | Bishop Emeritus of Soissons (-Laon), France | 
| 25 Feb | 43.9 | Ordained Bishop | Pierre-Louis Coeur † | Bishop of Troyes, France | 
| 51.9 | Ordained Bishop | Annibale-Raffaele Montalcini, C.Ss.R. † | Archbishop of Santa Severina, Italy | 
| 57.1 | Ordained Bishop | Tomás Miguel Pineda y Saldaña † | Titular Bishop of Antigonea | Bishop of San Salvador, El Salvador | 
 | Born | Félix Soto y Mancera † |  | Bishop of Badajoz, Spain | 
| 3 Mar | 24.2 | Ordained Priest | Léon Jules Marie Bélouino † | Priest | Auxiliary Bishop Emeritus of Port-au-Prince, Haïti | 
| 4 Mar | 52.4 | Ordained Bishop | Gennaro di Giacomo † | Bishop of Alife, Italy | 
| 40.0 | Ordained Bishop | Giuseppe de’ Bianchi Dottula † | Archbishop of Trani e Nazareth e Bisceglie, Italy | Archbishop of Trani e Barletta (e Nazareth e Bisceglie), Italy | 
| 39.6 | Installed | Antonio Magrini † | Bishop of Terni, Italy | Bishop of Forli, Italy | 
| 47.3 | Ordained Bishop | Leonardo Moccia † | Bishop of Gallipoli, Italy | 
| 73.8 | Died | Pietro Ostini † | Cardinal, Prefect of the Congregation of the Council | 
 | Born | Albino Angelo Pardini, C.R.L. † |  | Bishop Emeritus of Foligno, Italy | 
| 5 Mar |  | Born | Owen Patrick Bernard Corrigan † |  | Auxiliary Bishop of Baltimore, Maryland, USA | 
| 46.9 | Died | Alois Josef Schrenk † | Archbishop of Praha {Prague}, Czechia | 
 | Born | Juan José Solís y Fernández † |  | Bishop of Mondoñedo, Spain | 
| 7 Mar | 67.6 | Selected | Cirilo de Alameda y Brea, O.F.M. Obs. † | Archbishop of Burgos, Spain | Cardinal, Archbishop of Toledo, Spain | 
| 10 Mar |  | Born | Anton Johann Zerr † |  | Bishop Emeritus of Tiraspol, Moldova | 
| 15 Mar |  | Born | Rogatien-Joseph Martin, SS.CC. † |  | Vicar Apostolic of Marquesas Islands {Isole Marchesi}, French Polynesia, Pacific (Oceania) | 
| 74.4 | Died | Giuseppe Gasparo Mezzofanti † | Cardinal, Cardinal-Priest of Sant’Onofrio | 
| 18 Mar | 43.8 | Ordained Bishop | 
Étienne-Raymond Albrand, M.E.P. † | Titular Bishop of Sura | Vicar Apostolic of Kuiceu (Kweichow), China | 
| 73.4 | Ordained Bishop | Giacomo de Vincentiis † | Archbishop of Lanciano (e Ortona), Italy | 
| 19 Mar | 34.1 | Final Vows | Marc Finaz, S.J. † | Priest of Society of Jesus | Prefect Emeritus of Isole di Mayotta, Nossi-Bé e Comore, Madagascar | 
| 21 Mar | 72.5 | Died | Agustín Lorenzo Varela Temes † | Bishop of Salamanca, Spain | 
| 24 Mar | 23.2 | Ordained Priest | Giuseppe Maria Cione † | Priest | Bishop of Policastro, Italy | 
| 76.2 | Died | Pedro Martínez de San Martín † | Bishop of Barcelona, Spain | 
| 25 Mar | 57.1 | Installed | Hryhorij Jachimowicz † | Bishop of Przemyśl, Sambor, et Sanok (Ukrainian), Poland | Archbishop of Lviv (Ukrainian), Ukraine | 
| 23.3 | Ordained Priest | Thomas Timothy O’Mahony † | Priest of Cork, Ireland | Auxiliary Bishop of Toronto, Ontario, Canada | 
| 26 Mar | 42.8 | Selected | Louis-Marie-Joseph-Eusèbe Caverot † | Bishop of Saint-Dié, France | Cardinal, Archbishop of Lyon (-Vienne), France | 
| 27 Mar | 59.8 | Died | Juan Manuel de Irrizarri y Peralta † | Auxiliary Bishop of México, Federal District | 
| 29 Mar | 72.2 | Died | Juan Fernández de Sotomayor y Picón † | Bishop of Cartagena, Colombia | 
| 30 Mar | 50.4 | Selected | Łukasz Baraniecki † | Archbishop of Lviv, Ukraine | 
| 31 Mar |  | Born | Augusto Eduardo Nunes † |  | Archbishop of Évora, Portugal | 
| Apr | 62.0 | Died | Martino Caliendi † | Bishop of Montefeltro, Italy | 
| 1 Apr |  | Born | Jean-Jacques Crouzet, C.M. † |  | Vicar Apostolic of Fort-Dauphin, Madagascar | 
| 2 Apr | 50.2 | Appointed | Godehard Braun † | Auxiliary Bishop of Trier, Germany | 
| 50.2 | Appointed | Godehard Braun † | Titular Bishop of Callinicum | Auxiliary Bishop of Trier, Germany | 
| 51.1 | Confirmed | Jean-Antoine-Marie Foulquier † | Bishop of Mende, France | Bishop Emeritus | 
| 45.5 | Confirmed | Antoine-Matthias-Alexandre Jacquemet † | Bishop of Nantes, France | 
| 60.4 | Appointed | Jean-Marie Mioland † | Titular Archbishop of Sardes | Archbishop of Toulouse (-Narbonne), France | 
| 60.4 | Confirmed | Jean-Marie Mioland † | Coadjutor Archbishop of Toulouse (-Narbonne), France | Archbishop | 
| 48.2 | Appointed | Antonio Ranza † | Bishop of Piacenza, Italy | 
| 50.6 | Confirmed | Louis-Antoine de Salinis † | Bishop of Amiens, France | Archbishop of Auch, France | 
| 64.3 | Appointed | Fermín Sánchez Artesoro, O.F.M. Cap. † | Bishop of Cuenca, Spain | 
| 4 Apr | 61.6 | Died | Jean-Jacques Fayet † | Bishop of Orléans, France | 
| 6 Apr | 68.8 | Died | William Crolly † | Archbishop of Armagh, Ireland | 
| 7 Apr | 23.2 | Ordained Priest | Géraud-Marie Soubrier † | Priest | Bishop Emeritus of Oran, Algeria | 
| 8 Apr | 31.2 | Ordained Bishop | Hilarión Alcázar, O.P. † | Titular Bishop of Paphus | Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viet Nam | 
 | Born | Jean-Marie Barthe, S.J. † |  | Bishop Emeritus of Trichinopoly, India | 
| 30.4 | Ordained Bishop | St. José María Díaz Sanjurjo, O.P. † | Titular Bishop of Plataea | Vicar Apostolic of Central Tonking {Tonkino Centrale}, Viet Nam | 
| 9 Apr |  | Born | Manuel Torres y Torres † |  | Bishop of Plasencia, Spain | 
| 10 Apr |  | Born | Mattia Vicario † |  | Bishop of Novara, Italy | 
| 12 Apr | 51.5 | Confirmed | Joseph Othmar von Rauscher † | Bishop of Seckau, Austria | Cardinal, Archbishop of Wien {Vienna}, Austria | 
| 14 Apr |  | Born | Patrick James Donahue † |  | Bishop of Wheeling, West Virginia, USA | 
| 15 Apr | 32.2 | Ordained Bishop | Giovanni Antonio Balma, O.M.V. † | Titular Bishop of Ptolemais in Phoenicia | Archbishop of Cagliari, Italy | 
| 48.5 | Appointed | Pietro Bottazzi † | Apostolic Administrator of Termoli, Italy | Bishop of Larino, Italy | 
| 51.5 | Ordained Bishop | Joseph Othmar von Rauscher † | Bishop of Seckau, Austria | Cardinal, Archbishop of Wien {Vienna}, Austria | 
| 19 Apr | 47.2 | Selected | Félix-Antoine-Philibert Dupanloup † | Bishop of Orléans, France | 
| 20 Apr | 39.5 | Appointed | Gennaro Acciardi † | Bishop of Anglona-Tursi, Italy | 
| 50.0 | Appointed | Guerr’Antonio Boscarini † | Bishop of Urbania e Sant’Angelo in Vado, Italy | 
| 42.9 | Confirmed | Louis-Marie-Joseph-Eusèbe Caverot † | Bishop of Saint-Dié, France | Cardinal, Archbishop of Lyon (-Vienne), France | 
| 67.7 | Confirmed | Cirilo de Alameda y Brea, O.F.M. Obs. † | Archbishop of Burgos, Spain | Cardinal, Archbishop of Toledo, Spain | 
| 60.9 | Confirmed | Francesco Iavarone † | Bishop of Sant’Agata de’ Goti, Italy | 
 | Appointed | Francesco Javarone † | Bishop of Acerra, Italy | 
| 60.3 | Appointed | Camillo Monteforte † | Auxiliary Bishop of Napoli {Naples}, Italy | 
| 60.3 | Appointed | Camillo Monteforte † | Titular Bishop of Sidon | Auxiliary Bishop of Napoli {Naples}, Italy | 
| 50.6 | Appointed | Costantino Patrizi Naro † | Cardinal-Bishop of Albano | Cardinal, Secretary of the Congregation for Universal Inquisition | 
| 58.1 | Appointed | Pietro Raffaelli † | Bishop of Reggio Emilia, Italy | 
| 47.5 | Appointed | Giuseppe Singlau † | Bishop of Sansepolcro (Borgo San Sepolcro), Italy | 
| 59.4 | Confirmed | Leonardo Todisco Grande † | Bishop of Ascoli Satriano e Cerignola, Italy | 
| 43.0 | Confirmed | Domenico Ventura † | Archbishop of Amalfi, Italy | 
| 61.0 | Confirmed | Gabriele Ventriglia † | Bishop of Crotone (Cotrone), Italy | Bishop of Caiazzo, Italy | 
| 43.9 | Confirmed | Luigi Vetta † | Bishop of Nardò, Italy | 
| 29 Apr | 23.7 | Ordained Deacon | Stjepan Benedikt Pavlović-Lučić † | Deacon | Auxiliary Bishop of Split-Makarska (Spalato-Macarska), Croatia | 
| 30 Apr |  | Born | Maxime Decelles † |  | Bishop of Saint-Hyacinthe, Québec, Canada |