| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 54.3 | Resigned | Honuphrius Belsito † | Bishop of Lavello, Italy | Bishop Emeritus |
| Born | Ignace V Cattan (Qattan) † | Alep | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 72.0 | Died | John Galata † | Archbishop of Durrës (Durazzo), Albania |
| 26.3 | Ordained Priest | Michal Mateusz Kosmowski, C.R.L. † | Priest of Canons Regular of the Congregation of the Most Holy Saviour of the Lateran | Auxiliary Bishop of Gniezno, Poland |
| Born | Patrick MacMullan † | | Bishop of Down and Connor, Ireland |
| 15.3 | Professed | Franz von Raigesfeld, S.J. † | Member of Society of Jesus | Auxiliary Bishop of Ljubljana, Slovenia |
| 16.4 | Professed | Kajetan Maria (Ignaz Judas Thaddäus) Reisach, C.R. † | Member of Congregation of Clerics Regular | Titular Bishop of Dibon (Dibona) |
| 2 Jan | 82.1 | Died | Giovanni Pietro Faccolli † | Bishop of Troia, Italy |
| 3 Jan | 66.0 | Died | Egidio Antonio Isabelli † | Bishop of Alife, Italy |
| 6 Jan | 83.3 | Died | Pompeio Aldrovandi † | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 7 Jan | 38.0 | Appointed | Félicien Bocon de La Merlière † | Bishop of Apt, France | Bishop Emeritus |
| 15 Jan | 40.1 | Appointed | Franz Josef von Gondola, O.S.B. † | Auxiliary Bishop of Paderborn, Germany |
| 40.1 | Appointed | Franz Josef von Gondola, O.S.B. † | Titular Bishop of Tempe | Auxiliary Bishop of Paderborn, Germany |
| 17 Jan | 69.5 | Resigned | Francesco Landi Pietra † | Archbishop of Benevento, Italy | Cardinal, Archbishop Emeritus |
| 18 Jan | | Born | Fabrizio Selvi † | Sorano Sovana | Bishop Emeritus of Grosseto, Italy |
| 19 Jan | 67.8 | Died | Johann Joseph Anton Blatter † | Bishop of Sion {Sitten}, Switzerland |
| Appointed | James Keefe † | Bishop of Kildare and Leighlin, Ireland |
| 21 Jan | 50.5 | Appointed | Jean-Antoine Buocher, O.F.M. † | Coadjutor Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China | Vicar Apostolic Emeritus |
| 50.5 | Appointed | Jean-Antoine Buocher, O.F.M. † | Titular Bishop of Rosalia | Vicar Apostolic Emeritus of Shansi {Scian-Si} (Chan-Si), China |
| 22 Jan | | Born | Antonio Maria Nappi † | Livardi di Nola | Bishop of Ascoli Satriano e Cerignola, Italy |
| 23 Jan | | Born | Giuseppe d’Amante † | Procida | Bishop of Ischia, Italy |
| 22.9 | Ordained Priest | Baldassarre Vulcano, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Sessa Aurunca, Italy |
| 24 Jan | 40.2 | Appointed | Carlo Ciocchi † | Bishop of Valva, Italy | Bishop Emeritus |
| 40.2 | Appointed | Carlo Ciocchi † | Bishop of Sulmona, Italy | Bishop Emeritus of Valva, Italy |
| 45.4 | Appointed | Diego del Corro † | Bishop of Popayán, Colombia | Archbishop of Lima, Peru |
| 56.0 | Appointed | Juan José de Eguiara y Eguren † | Bishop of Yucatán (Mérida), México | Former Bishop-Elect |
| 55.3 | Appointed | Michele di Tarsia, C.P.O. † | Bishop of Conversano, Italy |
| 67.1 | Appointed | Francisco José de Figueredo y Victoria † | Archbishop of Guatemala |
| 53.9 | Appointed | Giovanni Battista Miceli † | Bishop of Cassano all’Jonio, Italy |
| 53.9 | Appointed | Franjo Thauszy † | Bishop of Zagreb (Agram), Croatia |
| 29 Jan | 47.1 | Ordained Bishop | Lucretius-Henri-François de La Tour du Pin † | Bishop of Riez, France |
| 50.7 | Died | Manuel Machado y Luna † | Bishop of Caracas, Santiago de Venezuela |
| 30 Jan | 42.3 | Ordained Bishop | Jean-Baptiste de Belloy-Morangle † | Bishop of Glandèves, France | Cardinal, Archbishop of Paris, France |
| 40.2 | Ordained Bishop | Carlo Ciocchi † | Bishop of Valva, Italy | Bishop Emeritus |
| 55.3 | Ordained Bishop | Michele di Tarsia, C.P.O. † | Bishop of Conversano, Italy |
| 53.9 | Ordained Bishop | Giovanni Battista Miceli † | Bishop of Cassano all’Jonio, Italy |
| 2 Feb | 80.8 | Died | Paolo de Mercurio † | Bishop of Giovinazzo e Terlizzi, Italy |
| 7 Feb | | Born | Charles-François-Marie Petit-Benoit de Chaffoy † | Bessançon | Bishop of Nîmes, France |
| 9 Feb | 78.5 | Died | Tommaso Maria Marelli, C.O. † | Bishop of Imola, Italy |
| 10 Feb | 46.0 | Ordained Bishop | John Joseph Hornyold † | Titular Bishop of Philomelium | Vicar Apostolic of Midland District, England, Great Britain |
| 12 Feb | | Born | John Chisholm † | Strathglass, Inverness | Vicar Apostolic of Highland District, Scotland, Great Britain |
| 16 Feb | | Born | Luigi Bottiglia Savoulx † | Cavour, Italy | Cardinal, Prefect of the Apostolic Signatura |
| 25 Feb | | Died | Patrick MacDonogh † | Bishop of Killaloe, Ireland |
| 28 Feb | 40.0 | Appointed | Petru Pavel Aron, O.S.B.M. † | Bishop of Făgăraş (Romanian), Romania |
| Mar | 60.2 | Died | Diego García Medrano † | Bishop of Segovia, Spain |
| 1 Mar | 54.2 | Resigned | Antun Becić † | Bishop of Nicopoli, Bulgaria | Bishop of Hvar (Lesina), Croatia |
| 5 Mar | 41.9 | Ordained Bishop | György Klimó † | Bishop of Pécs, Hungary |
| 62.0 | Died | Józef Dominik Puzyna † | Bishop of Inflanty (Livonia)-Pilten, Poland |
| 8 Mar | 24.4 | Ordained Priest | Etienne-Charles de Loménie de Brienne † | Priest | Cardinal, Archbishop of Sens, France |
| 12 Mar | | Born | Filippo Ghighi † | Bibiana | Bishop of Sovana (Soana), Italy |
| 41.0 | Ordained Bishop | Giovanni Battista Albrici Pellegrini † | Titular Bishop of Epiphania in Syria | Bishop of Como, Italy |
| 14 Mar | 61.7 | Died | François de Baglion de la Salle † | Bishop of Arras, France |
| Born | Bernardo García y Hernández (Fernandez Perdigon), O.F.M. † | El Perdigón, Spain | Bishop of Nueva Caceres, Philippines |
| 18 Mar | 23.1 | Ordained Priest | Sebastiano de Rosa † | Priest | Bishop of Avellino e Frigento, Italy |
| 25.1 | Ordained Priest | Francesco Maria Locatelli † | Priest | Cardinal, Bishop of Spoleto, Italy |
| 23.2 | Ordained Priest | Franz Melchior Joseph Zen-Ruffinen † | Priest of Sion {Sitten}, Switzerland | Bishop |
| 20 Mar | 42.7 | Appointed | Giovanni Carlo Bandi † | Cardinal, Bishop of Imola, Italy |
| 61.1 | Appointed | Josephus Antonius Chiolnich † | Bishop of Bosnia, Croatia |
| 62.9 | Appointed | Hijacint Marija Milković, O.P. † | Archbishop of Dubrovnik (Ragusa), Croatia |
| 60.1 | Appointed | Francesco Pacca † | Archbishop of Benevento, Italy |
| 56.8 | Appointed | Juan Manuel Rodríguez Castañón † | Bishop of Tui, Spain |
| 45.6 | Appointed | Carlo Rosati † | Bishop of Alife, Italy |
| 64.7 | Appointed | Onésimo Salamanca Zaldívar † | Archbishop of Granada, Spain | Archbishop of Burgos, Spain |
| 21 Mar | | Born | Bartolomeo Cesare † | Napoli | Bishop of Potenza e Marsico Nuovo, Italy |
| Ordained Bishop | James Keefe † | Bishop of Kildare and Leighlin, Ireland |
| 25 Mar | 60.2 | Ordained Bishop | Francesco Pacca † | Archbishop of Benevento, Italy |
| 23.5 | Ordained Priest | Adelmo Gennaro Pignatelli, O.S.B. † | Priest of Order of Saint Benedict | Archbishop of Capua, Italy |
| Born | Giuseppe Maria Tedeschi † | Castellaneta | Archbishop of Brindisi, Italy |
| 26 Mar | | Born | Ramón Falcón y Salcedo † | Sigüenza | Bishop of Cuenca, Spain |
| 29 Mar | 45.6 | Ordained Bishop | Carlo Rosati † | Bishop of Alife, Italy |
| Apr | 65.2 | Died | Jean-François de Macheco de Prémeaux † | Bishop of (Saint-Lizier de) Couserans, France |
| 1 Apr | 32.2 | Ordained Priest | Giovanni Francesco Guidi di Bagno-Talenti † | Priest | Titular Patriarch of Antiochia {Antioch} |
| 25.3 | Ordained Priest | John MacDonald † | Priest | Vicar Apostolic of Highland District, Scotland, Great Britain |
| 4 Apr | 61.7 | Ordained Priest | Giovanni Carlo Antonelli † | Priest | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 8 Apr | | Born | Claude-François de Thiollaz † | Chaumont-sur-Frangy | Bishop of Annecy, France |
| 9 Apr | 70.8 | Ordained Bishop | Giovanni Battista Spínola † | Bishop of Albano | Cardinal, Cardinal-Bishop |
| 12 Apr | | Born | Johann Aloys (Algis) Schneider † | Brno | Vicar Apostolic of Foreign Vicariate |
| 13 Apr | | Born | Pietro Antonio Raimundo de San Giuseppe Roviglia, O.C.D. † | Mombaruzzo | Vicar Apostolic Emeritus of Malabar, India |
| 16 Apr | 38.6 | Ordained Bishop | Sebastianus a S. Margherita (Marcus Antonius) Piacentini, O.C.D. † | Bishop of Ispahan, Iran |
| 18 Apr | | Born | Etienne-Parfait-Martin Maurel de Mons † | Aix-en-Provence | Archbishop of Avignon, France |
| 40.8 | Appointed | Karl Michael von Attems (Attembs) † | Archbishop of Gorizia (Görz), Italy |
| 24 Apr | 63.9 | Appointed | Jaime Cortada Bru † | Bishop of Zamora, Spain | Archbishop of Tarragona, Spain |
| 81.4 | Died | Edward Dicconson † | Vicar Apostolic of Northern District, England, Great Britain |
| 52.8 | Appointed | Juan Manuel Escobar Carrera † | Bishop of Mondoñedo, Spain |
| 38.4 | Appointed | Giuseppe Orlandi, O.S.B. † | Bishop of Giovinazzo e Terlizzi, Italy |
| 25 Apr | | Born | Vincenzo Maria Mossi de Morano † | Casalen | Bishop Emeritus of Alessandria (della Paglia), Italy |
| 30 Apr | 38.4 | Ordained Bishop | Giuseppe Orlandi, O.S.B. † | Bishop of Giovinazzo e Terlizzi, Italy |
| 3 May | | Born | Juan Cruz Ruiz de Cabañas y Crespo † | Espronceda, Spain | Bishop of Guadalajara, Jalisco, México |
| 4 May | | Appointed | John MacColgan † | Bishop of Derry, Ireland |
| 5 May | | Selected | Patrick O’Naghten † | Bishop of Killaloe, Ireland | Former Bishop-Elect |
| 59.6 | Succeeded | Francis Petre † | Vicar Apostolic of Northern District, England, Great Britain |
| 12 May | | Confirmed | Patrick O’Naghten † | Bishop of Killaloe, Ireland | Former Bishop-Elect |
| 13 May | 72.3 | Died | Alessandro Guiccioli † | Bishop of Rimini, Italy |
| 15 May | 61.8 | Appointed | Giovanni Carlo Antonelli † | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 61.8 | Appointed | Giovanni Carlo Antonelli † | Titular Bishop of Dioclea | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 53.5 | Appointed | Josephus de Oliveira Calado † | Auxiliary Bishop of Braga, Portugal |
| 53.5 | Appointed | Josephus de Oliveira Calado † | Titular Bishop of Mauricastro | Auxiliary Bishop of Braga, Portugal |
| 44.4 | Appointed | Giacinto Giustiniani, O.P. † | Bishop of Syros (e Milos), Greece | Bishop Emeritus |
| 45.3 | Appointed | Gottfried Xaver von Laimbeckhoven, S.J. † | Bishop of Nanking [Nanjing], China |
| 21 May | 23.4 | Ordained Priest | Joseph VI Estephan † | Priest | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 22 May | 66.9 | Died | Juan Bravo del Rivero y Correa † | Bishop of Arequipa, Peru |
| 23 May | 64.0 | Ordained Bishop | Jaime Cortada Bru † | Bishop of Zamora, Spain | Archbishop of Tarragona, Spain |
| 24 May | 55.4 | Died | François de Lastic de Saint-Jal † | Bishop of Castres, France |
| 27 May | 59.1 | Ordained Priest | Vincenzo Acqua † | Priest | Bishop of Spoleto, Italy |
| 26.1 | Ordained Priest | Angelo Maria Zuccari † | Priest | Bishop of Capaccio, Italy |
| 28 May | 27.8 | Ordained Priest | César Constantin François de Hoensbroeck † | Priest of Liège, Belgium | Bishop |
| 29 May | | Born | Rainieri Alliata † | Pisa | Archbishop of Pisa, Italy |
| 30 May | 60.7 | Died | Miguel Vicente Cebrián Agustín † | Bishop of Córdoba, Spain |
| 31 May | | Born | Jacques-Benjamin Longer, M.E.P. † | Le Havre, France | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| Jun | 78.9 | Died | Michele Orsi † | Archbishop of Otranto, Italy |
| 4 Jun | 61.9 | Ordained Bishop | Giovanni Carlo Antonelli † | Titular Bishop of Dioclea | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 38.4 | Ordained Bishop | Félicien Bocon de La Merlière † | Bishop of Apt, France | Bishop Emeritus |
| 7 Jun | 86.1 | Died | Lorenzo Tartagni † | Bishop Emeritus of Veroli, Italy |
| 11 Jun | 53.0 | Ordained Bishop | Juan Manuel Escobar Carrera † | Bishop of Mondoñedo, Spain |
| 16 Jun | 61.5 | Died | José Maria da Fonseca de Évora, O.F.M. † | Bishop of Porto, Portugal |
| 20 Jun | 80.5 | Died | José Cubero Ramírez de Arellano, O. de M. † | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 24 Jun | 68.9 | Appointed | Carlo Alberto Guidobono Cavalchini † | Chamberlain (Camerlengo) of the College of Cardinals | Cardinal, Datary of the Apostolic Datary |
| 74.4 | Died | Domenico Marzano † | Bishop of Bova, Italy |
| 26 Jun | 88.1 | Died | Giulio Alberoni † | Cardinal, Bishop Emeritus of Málaga, Spain |
| 29 Jun | 23.0 | Ordained Priest | Manuel Ferrer y Figueredo † | Priest | Bishop of Málaga, Spain |