| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 58.7 | Ordained Bishop | Francisco Julián de Antolino † | Bishop of Puerto Rico (Porto Rico) | Bishop of Caracas, Santiago de Venezuela |
| Born | Krikor Eugene Baghinanti † | Alcaziche | Titular Archbishop of Theodosiopolis in Armenia |
| 24.5 | Ordained Priest | Johann Adam Behr † | Priest of Bamberg, Germany | Auxiliary Bishop |
| 61.0 | Died | Fortunato Bisleti † | Titular Bishop of Cisamus |
| 41.8 | Ordained Bishop | Andrés Cano y Junquera † | Titular Bishop of Arad | Auxiliary Bishop of Sigüenza, Spain |
| Born | Patrick Curtis † | Miden | Archbishop of Armagh, Ireland |
| Born | Charles-César-Louis d’Agoult de Bonneval † | Grenoble | Bishop Emeritus of Pamiers, France |
| Born | Estefan El-Khazen † | Alep | Archbishop of Damas (Maronite), Syria |
| 62.1 | Died | Francisco de Molina, O.S.Bas. † | Bishop of Comayagua, Honduras |
| Died | Bonaventure O’Gallagher, O.F.M. † | Bishop of Raphoe, Ireland |
| 26.9 | Ordained Priest | Atanasie Rednic, O.S.B.M. † | Priest of Basilian Order of Saint Josaphat (Order of St. Basil the Great) | Bishop of Făgăraş (Romanian), Romania |
| Born | James Jerome Sharrock, O.S.B. † | | Former Bishop-Elect |
| Jan | | Born | Vincenzo Paccaroni, O.S.B. † | Firman | Titular Bishop of Constantia in Arabia |
| 1 Jan | | Born | Anne-Antoine-Jules de Clermont-Tonnerre † | Paris | Cardinal, Archbishop of Toulouse (-Narbonne), France |
| 6 Jan | 74.9 | Died | Tommaso Alessio de’ Rossi † | Bishop of Teramo, Italy |
| 20 Jan | 65.2 | Confirmed | Juan de Castañeda Velásquez y Salazar † | Bishop of Cuzco, Peru |
| 59.5 | Confirmed | Johann Friedrich Karl von Ostein † | Coadjutor Bishop of Worms, Germany | Archbishop of Mainz, Germany |
| 50.1 | Appointed | Manuel Quintano Bonifaz † | Auxiliary Bishop of Toledo, Spain | Apostolic Administrator |
| 50.1 | Appointed | Manuel Quintano Bonifaz † | Titular Bishop of Pharsalus | Apostolic Administrator of Toledo, Spain |
| 35.9 | Appointed | Francisco de Solís Folch de Cardona † | Auxiliary Bishop of Sevilla {Seville}, Spain | Cardinal, Archbishop |
| 35.9 | Appointed | Francisco de Solís Folch de Cardona † | Titular Archbishop of Traianopolis in Rhodope | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| 57.8 | Appointed | José Zorrilla Sanmartín † | Bishop of Salamanca, Spain |
| 23 Jan | 52.1 | Selected | Cayetano Marcellano y Agramont † | Bishop of Buenos Aires, Argentina | Archbishop of La Plata o Charcas, Bolivia |
| Appointed | Michael O’Reilly † | Archbishop of Armagh, Ireland |
| Appointed | Mark Skerret † | Bishop of Killala, Ireland | Archbishop of Tuam, Ireland |
| 29 Jan | | Born | Francisco Rousset de Jesús y Rosas, O.F.M. † | Habana, Cuba | Bishop of Sonora, México |
| 1 Feb | | Born | Franz Xaver von Salm-Reifferscheidt-Krautheim † | Vienna, Austria | Cardinal, Bishop of Gurk, Austria |
| 9 Feb | 65.2 | Died | Anselm Franz von Ingelheim † | Bishop of Würzburg, Germany |
| 10 Feb | | Born | Nicola Vecchi † | Falco | Bishop of Teano, Italy |
| 16 Feb | 55.1 | Ordained Bishop | Jean-François Dondel † | Bishop of Dol, France |
| 48.1 | Ordained Bishop | Johann Nikolaus (Febronius) von Hontheim † | Titular Bishop of Myriophytos | Auxiliary Bishop of Trier, Germany |
| 20 Feb | | Born | Georg Karl Ignaz von Fechenbach zu Laudenbach † | Mainz | Bishop of Würzburg, Germany |
| 24 Feb | 72.9 | Died | Joseph Heinrich von Braitenbücher † | Auxiliary Bishop of Wien, Austria |
| 26 Feb | | Born | Franz Xaver von Neveu † | Hochstift Basel | Bishop of Basel, Switzerland |
| 1 Mar | 24.6 | Ordained Priest | Lothar Breidbach zu Bürresheim, O.S.B. † | Priest of Order of Saint Benedict | Auxiliary Bishop of Fulda, Germany |
| 22.9 | Ordained Priest | Bonifacio Da Ponte, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Capodistria (Capo d’Istria)(Koper), Slovenia |
| 23.0 | Ordained Priest | Francesco Brunone Fazzi † | Priest | Bishop of San Miniato, Italy |
| 24.7 | Ordained Priest | Carlo Giuseppe Filippa della Martiniana † | Priest | Cardinal, Bishop of Vercelli, Italy |
| 2 Mar | | Born | Cesare Guerrieri Gonzaga † | Mantua | Cardinal, Priest of Roma {Rome}, Italy |
| 3 Mar | 48.2 | Appointed | Domenico Bozzoni † | Bishop of Gerace, Italy |
| 45.8 | Appointed | Antonio Francesco de Plato † | Bishop of Carinola (Calina), Italy | Bishop of Tricarico, Italy |
| 49.0 | Appointed | Ludwik Ignacy Riaucour † | Auxiliary Bishop of Lutsk (Łuck), Ukraine |
| 49.0 | Appointed | Ludwik Ignacy Riaucour † | Titular Bishop of Ptolemais in Thebaide | Auxiliary Bishop of Lutsk (Łuck), Ukraine |
| Born | Michele de Vincenti † | Palermo | Titular Bishop of Erythrum |
| 4 Mar | | Born | Romualdo Antonio Mon y Velarde † | Oscos | Archbishop of Sevilla {Seville}, Spain |
| 9 Mar | 48.2 | Ordained Bishop | Domenico Bozzoni † | Bishop of Gerace, Italy |
| 51.4 | Ordained Bishop | Francisco Cuartero Lumbreras † | Bishop of Segorbe, Spain |
| 59.6 | Ordained Bishop | Pedro Gómez de la Torre † | Bishop of Ciudad Rodrigo, Spain | Bishop of Plasencia, Spain |
| 45.8 | Ordained Bishop | Antonio Francesco de Plato † | Bishop of Carinola (Calina), Italy | Bishop of Tricarico, Italy |
| 16 Mar | 23.9 | Ordained Priest | Florian Amand Janowski, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Tarnów, Poland |
| 50.2 | Ordained Bishop | Manuel Quintano Bonifaz † | Titular Bishop of Pharsalus | Apostolic Administrator of Toledo, Spain |
| 36.1 | Ordained Bishop | Francisco de Solís Folch de Cardona † | Titular Archbishop of Traianopolis in Rhodope | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| 22 Mar | 23.7 | Ordained Priest | Diego Genovesi † | Priest | Bishop of Squillace, Italy |
| 26.4 | Ordained Priest | Giovanni Lercari † | Priest | Archbishop of Genova, Italy |
| 23 Mar | 40.6 | Ordained Bishop | Heinrich Joseph von Nitschke † | Titular Bishop of Antipatris | Auxiliary Bishop of Bamberg, Germany |
| 58.0 | Ordained Bishop | José Zorrilla Sanmartín † | Bishop of Salamanca, Spain |
| 28 Mar | | Born | Antonio Maria Doria Pamphilj † | Naples, Italy | Cardinal, Archpriest of the Basilica di Santa Maria Maggiore {Saint Mary Major Basilica} |
| 29 Mar | | Born | Josephus Corari † | Roma | Auxiliary Bishop of Sabina, Italy |
| 30 Mar | 47.2 | Died | Manuel Jiménez Bretón † | Bishop-Elect of Caracas, Santiago de Venezuela |
| 2 Apr | 63.3 | Resigned | Pierluigi del Mayo † | Bishop of Isola, Italy | Bishop Emeritus |
| 59.6 | Died | Pio Tommaso Milante, O.P. † | Bishop of Castellammare di Stabia, Italy |
| 3 Apr | | Born | Luis Ignatius Peñalver y Cárdenas † | Havana, Cuba | Archbishop Emeritus of Guatemala |
| 7 Apr | 26.5 | Ordained Priest | Giuseppe Maria Langosco-Stroppiana † | Priest | Bishop of Alba (Pompea), Italy |
| 10 Apr | 61.5 | Died | Tommaso Aceti (Aoeti) † | Bishop of Lacedonia, Italy |
| 12 Apr | 75.4 | Resigned | Gianfrancesco De’ Bisleti † | Bishop of Segni, Italy | Bishop Emeritus |
| 13 Apr | | Born | Francesco Antonio Nanni, C.M. † | Avezzano | Bishop Emeritus of Teramo, Italy |
| 14 Apr | 58.4 | Selected | Karl Philipp von Greifenclau zu Vollraths † | Bishop of Würzburg, Germany |
| 20 Apr | | Born | Cristóbal Pérez Viala † | Villamalea | Bishop of Jaca, Spain |
| 21 Apr | 51.4 | Appointed | Benedetto Gaetani † | Bishop of Colle di Val d’Elsa, Italy |
| 37.3 | Confirmed | Jean-Louis de La Marthonie de Caussade † | Bishop of Poitiers, France | Bishop of Meaux, France |
| 52.3 | Confirmed | Cayetano Marcellano y Agramont † | Bishop of Buenos Aires, Argentina | Archbishop of La Plata o Charcas, Bolivia |
| 28.2 | Appointed | Panfilo Antonio Mazzara † | Bishop of Teramo, Italy |
| 65.1 | Appointed | Federigo Muschi † | Bishop of Segni, Italy |
| 41.5 | Appointed | Domenico Poltri † | Bishop of Sansepolcro (Borgo San Sepolcro), Italy | Bishop of San Miniato, Italy |
| 50.8 | Appointed | Johann Karl Leopold von Scherffenberg † | Auxiliary Bishop of Olomouc (Olmütz), Czech Republic |
| 50.8 | Appointed | Johann Karl Leopold von Scherffenberg † | Titular Bishop of Tanagra | Auxiliary Bishop of Olomouc (Olmütz), Czech Republic |
| 27 Apr | 51.4 | Ordained Bishop | Benedetto Gaetani † | Bishop of Colle di Val d’Elsa, Italy |
| Born | Fortuné-Charles de Mazenod † | Aix-en-Provence | Bishop Emeritus of Marseille, France |
| 41.5 | Ordained Bishop | Domenico Poltri † | Bishop of Sansepolcro (Borgo San Sepolcro), Italy | Bishop of San Miniato, Italy |
| May | | Died | Francis Stuart, O.F.M. † | Bishop of Down and Connor, Ireland |
| 1 May | 23.0 | Ordained Priest | Giambattista Ettore Caracciolo, C.R. † | Priest of Congregation of Clerics Regular | Archbishop of Bari (-Canosa), Italy |
| 28.2 | Ordained Bishop | Panfilo Antonio Mazzara † | Bishop of Teramo, Italy |
| 65.1 | Ordained Bishop | Federigo Muschi † | Bishop of Segni, Italy |
| 5 May | 59.9 | Confirmed | Andreas Jakob von Dietrichstein † | Archbishop of Salzburg, Austria |
| 43.9 | Appointed | Jean Baptiste D’Orliè De Saint Innocent, C.R.S.A. † | Bishop of Pinerolo, Italy |
| 53.2 | Appointed | Dominique (Wilhelm Philipp) Gentis, O.P. † | Bishop of Antwerpen {Antwerp, Anvers}, Belgium |
| 55.8 | Appointed | Nicolaus Givovich † | Coadjutor Bishop of Sirmio (Srijem; Sirmium), Croatia | Bishop |
| 55.8 | Appointed | Nicolaus Givovich † | Titular Bishop of Anemurium | Bishop of Sirmio (Srijem; Sirmium), Croatia |
| 45.2 | Appointed | Giuseppe Lancellotti, O.F.M. Conv. † | Bishop of Isola, Italy |
| Appointed | Mark Skerret † | Archbishop of Tuam, Ireland |
| 7 May | | Appointed | Bonaventura MacDonnell, O.F.M. † | Bishop of Killala, Ireland |
| 11 May | 43.9 | Ordained Bishop | Jean Baptiste D’Orliè De Saint Innocent, C.R.S.A. † | Bishop of Pinerolo, Italy |
| 53.2 | Ordained Bishop | Dominique (Wilhelm Philipp) Gentis, O.P. † | Bishop of Antwerpen {Antwerp, Anvers}, Belgium |
| 45.2 | Ordained Bishop | Giuseppe Lancellotti, O.F.M. Conv. † | Bishop of Isola, Italy |
| 15 May | 24.0 | Ordained Priest | Pasquale Sansone † | Priest | Bishop of Ischia, Italy |
| 18 May | 37.4 | Ordained Bishop | Jean-Louis de La Marthonie de Caussade † | Bishop of Poitiers, France | Bishop of Meaux, France |
| 27 May | 23.9 | Ordained Priest | Crescentius Maria Grippi † | Priest | Titular Bishop of Amorium |
| 31 May | 23.6 | Ordained Priest | Giuseppe Garampi † | Priest | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 23.0 | Ordained Priest | Venantius Felix Scotti † | Priest | Bishop of Šibenik (Knin), Croatia |
| 27.8 | Ordained Priest | Filippo Maria Visconti † | Priest | Archbishop of Milano {Milan}, Italy |
| 1 Jun | 60.0 | Ordained Bishop | Andreas Jakob von Dietrichstein † | Archbishop of Salzburg, Austria |
| 49.3 | Ordained Bishop | Ludwik Ignacy Riaucour † | Titular Bishop of Ptolemais in Thebaide | Auxiliary Bishop of Lutsk (Łuck), Ukraine |
| 25 Jun | 64.8 | Died | Giovanni Battista Campagnoli † | Bishop of Recanati e Loreto, Italy |
| 29 Jun | 55.9 | Ordained Bishop | Nicolaus Givovich † | Titular Bishop of Anemurium | Bishop of Sirmio (Srijem; Sirmium), Croatia |