| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 54.0 | Died | Georgius Casimirus Ancuta † | Auxiliary Bishop of Vilnius, Lithuania |
| 25.7 | Ordained Priest | Emericus Christovich † | Priest | Bishop of Csanád, Hungary |
| 85.0 | Died | Denis Moriarty † | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland |
| Born | James Louis O’Donel, O.F.M. † | Knocklofty, Ireland | Vicar Apostolic Emeritus of Newfoundland, Canada |
| 22.9 | Ordained Priest | Saverio Palica, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Andria, Italy |
| 63.0 | Died | Pietro Scurra † | Archbishop of Durrës (Durazzo), Albania |
| 1 Jan | 32.0 | Ordained Priest | Antonius Taveira de Neiva Brum † | Priest | Archbishop Emeritus of Goa, India |
| 3 Jan | | Born | Kasimir Johann Baptist von Häffelin † | Minfeld | Cardinal, Cardinal-Priest of Sant’Anastasia |
| 4 Jan | | Born | Filippo Scarola † | Napoli | Titular Bishop of Helenopolis in Bithynia |
| 5 Jan | 86.0 | Died | Cyprien-Gabriel Bénard de Résay † | Bishop of Angoulême, France |
| 6 Jan | 80.4 | Died | Francesco Maria Federico Carafa, C.R. † | Bishop of Nola, Italy |
| 25.5 | Ordained Priest | Karl Michael von Attems (Attembs) † | Priest | Archbishop of Gorizia (Görz), Italy |
| 12 Jan | 28.9 | Appointed | Józef Julian Sapieha † | Coadjutor Bishop of Vilnius, Lithuania |
| 28.9 | Appointed | Józef Julian Sapieha † | Titular Bishop of Diocaesarea in Isauria | Coadjutor Bishop of Vilnius, Lithuania |
| 15 Jan | 85.7 | Died | Giuseppe Renato Imperiali † | Cardinal, Cardinal-Priest of San Lorenzo in Lucina |
| Born | Baltazar Jaime Martínez de Compañón † | Cabredo, Spain | Archbishop of Santafé en Nueva Granada, Colombia |
| 17 Jan | 68.9 | Died | Carlo Cornaccioli, O. Carm. † | Bishop of Bobbio, Italy |
| 24 Jan | 73.8 | Died | Alexander Sigmund am Rhein zu Neuburg † | Bishop of Augsburg, Germany |
| 78.9 | Succeeded | Johann Franz von Schenk von Stauffenberg † | Bishop of Augsburg, Germany | Bishop of Konstanz {Constance}, Germany |
| 26 Jan | | Born | Nicola Francesco Franchi † | Chieti | Bishop of Penne e Atri, Italy |
| 27 Jan | 48.1 | Ordained Priest | Pierre Louis Jacquet † | Priest of Liège, Belgium | Auxiliary Bishop |
| Feb | 74.0 | Died | Filippo Valignani, O.P. † | Archbishop of Chieti, Italy |
| 9 Feb | 65.3 | Died | Alfonso Mariconda, O.S.B. † | Archbishop of Acerenza e Matera, Italy |
| 10 Feb | 30.9 | Ordained Bishop | Józef Tadeusz Kierski † | Titular Bishop of Bolina | Bishop of Przemyśl, Poland |
| 24.0 | Ordained Priest | Giovanni Antonio Francisco de Nobili † | Priest | Bishop of Larino, Italy |
| 11 Feb | 35.1 | Appointed | Jakub Stefan Augustynowicz † | Coadjutor Archbishop of Lviv (Armenian), Ukraine |
| 35.1 | Appointed | Jakub Stefan Augustynowicz † | Titular Archbishop of Aegae | Coadjutor Archbishop of Lviv (Armenian), Ukraine |
| 46.2 | Appointed | Giovanni Antonio Bacchetoni † | Bishop of Anagni, Italy | Bishop of Recanati e Loreto, Italy |
| 37.2 | Confirmed | Bonaventure Bauyn † | Bishop of Uzés, France |
| 44.6 | Appointed | Carminus Cioffi † | Titular Bishop of Antaeopolis |
| 55.0 | Appointed | Valentinus Alexander Czapski, O. Cist. † | Bishop of Przemyśl, Poland | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 76.3 | Appointed | Gianantonio Davia † | Cardinal-Priest of San Lorenzo in Lucina | Cardinal, Bishop Emeritus of Rimini, Italy |
| 48.1 | Appointed | Pierre Louis Jacquet † | Auxiliary Bishop of Liège, Belgium |
| 48.1 | Appointed | Pierre Louis Jacquet † | Titular Bishop of Hippo Diarrhytus | Auxiliary Bishop of Liège, Belgium |
| 40.1 | Appointed | François de Lastic de Saint-Jal † | Bishop of Castres, France |
| 74.2 | Appointed | Vincenzo Petra † | Cardinal-Priest of San Pietro in Vincoli | Cardinal, Cardinal-Bishop of Palestrina |
| 45.2 | Appointed | Achille Puglia † | Bishop of Nicastro, Italy |
| 26 Feb | 64.0 | Died | Bartolomeo Pucci Franceschi † | Bishop of Pescia, Italy |
| 27 Feb | | Born | Fabien-Sébastien Imberties † | Cahors | Bishop of Autun, France |
| Mar | 66.8 | Died | Nicola Cani, O.P. † | Bishop of Bosa, Italy |
| Born | Jacobus Francone † | Pollena | Titular Bishop of Sidon |
| 2 Mar | | Born | Lorenzo Prospero Bottini † | Lucca, Italy | Cardinal, Priest of the Roman Curia - Other |
| 61.2 | Died | Sebastião de Andrade Peçanha † | Archbishop Emeritus of Goa, India |
| 6 Mar | | Born | Iovinus Fridericus Bystrzycki † | Wypychy | Auxiliary Bishop-Elect of Warszawa {Warsaw}, Poland |
| 10 Mar | | Born | Vittorio Maria Baldassare Gaetano Costa d’Arignano † | Turin | Cardinal, Archbishop of Torino {Turin}, Italy |
| 16 Mar | 24.2 | Ordained Priest | Ignazio Andrea Sambiase, C.R. † | Priest of Congregation of Clerics Regular | Archbishop of Conza, Italy |
| 18 Mar | | Born | Adalbert (Wilhelm Adolph Heinrich) von Harstall, O.S.B. † | Treffurt | Bishop of Fulda, Germany |
| 76.0 | Died | Curzio Origo † | Cardinal, Cardinal-Priest of Sant’Eustachio |
| 19 Mar | 79.6 | Died | Johann Konrad von Reinach-Hirzbach † | Bishop of Basel, Switzerland |
| 20 Mar | 56.1 | Appointed | Antonio Saverio Gentili † | Cardinal, Prefect of the Congregation of the Council |
| 24 Mar | 37.3 | Ordained Bishop | Bonaventure Bauyn † | Bishop of Uzés, France |
| 25 Mar | 23.9 | Ordained Priest | Edmond Bennetat, M.E.P. † | Priest of La Société des Missions Etrangères | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 29 Mar | 67.9 | Died | Álvaro Pires de Castro Noronha † | Bishop of Portalegre, Portugal |
| 31 Mar | 39.9 | Ordained Bishop | Józef Eustachy Szembek † | Bishop of Chełm, Poland | Bishop of Płock, Poland |
| 4 Apr | | Born | József Király † | Komárom | Bishop of Pécs, Hungary |
| 8 Apr | | Succeeded | Hilario a Jesu Costa, O.A.D. † | Vicar Apostolic of Eastern Tonking {Tonkino Orientale}, Viet Nam |
| 13 Apr | 66.7 | Died | Santiago Pinaque, O. Carm. † | Bishop of Gaeta, Italy |
| Born | Franciscus Xaverius de Vita † | Castelvetrano | Titular Bishop of Philomelium |
| 14 Apr | 31.1 | Ordained Priest | Franz Konrad Kasimir Ignaz von Rodt † | Priest of Konstanz {Constance}, Germany | Cardinal, Bishop |
| 16 Apr | 78.8 | Died | Marco Giacinto Gandolfo † | Bishop of Noli, Italy |
| 20 Apr | 29.0 | Ordained Priest | Josephus Aluffi † | Priest | Bishop Emeritus of Bagnoregio (Bagnorea), Italy |
| 23.9 | Ordained Priest | Francesco Antonio Scoppa † | Priest | Bishop of Ostuni, Italy |
| 28 Apr | 41.3 | Ordained Bishop | Valerian Rist, O.F.M. † | Titular Bishop of Myndus | Coadjutor Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 56.9 | Ordained Bishop | Giovanni Leonardo Sanna † | Bishop of Ampurias e Civita, Italy | Bishop of Bosa, Italy |
| 1 May | 34.0 | Ordained Priest | Juan Portugal de la Puebla † | Priest | Titular Patriarch of Constantinople |
| 3 May | | Born | Juan Félix de Villegas † | Cóbreces, Spain | Archbishop of Guatemala |
| 4 May | 62.1 | Resigned | Jean-François Boyer, C.R. † | Bishop of Mirepoix, France | Bishop Emeritus |
| Died | Cornelius O’Keeffe † | Bishop of Limerick, Ireland |
| 5 May | 35.3 | Ordained Bishop | Jakub Stefan Augustynowicz † | Titular Archbishop of Aegae | Coadjutor Archbishop of Lviv (Armenian), Ukraine |
| 6 May | 52.0 | Appointed | Neri Maria Corsini † | Cardinal-Deacon of Sant’Eustachio | Cardinal, Prefect of the Apostolic Signatura |
| 55.3 | Appointed | Antoni Sebastian Dembowski † | Bishop of Płock, Poland | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 31.8 | Appointed | Antonio Maria Franci † | Bishop of Grosseto, Italy |
| 47.7 | Appointed | Michele Palma † | Archbishop of Chieti, Italy |
| 69.5 | Appointed | Gaetano Stampa † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 40.5 | Appointed | Louis-Marie de Suarès d’Aulan † | Bishop of Acqs (Dax), France | Bishop Emeritus |
| 48.5 | Appointed | Andreas Venditti (Vinditti) † | Bishop of Polignano (Polinianum), Italy |
| 38.5 | Appointed | Mikołaj Gerard Wyżycki † | Archbishop of Lviv, Ukraine |
| 7 May | 44.3 | Appointed | Giuseppe Luigi de Andujar, O.P. † | Bishop of Bobbio, Italy | Bishop of Tortona, Italy |
| 8 May | | Born | Joseph Ernest Gandolph von Kuenburg † | Graz | Bishop of Lavant, Slovenia |
| 10 May | | Born | Franz Egon von Fürstenberg † | Herdringen | Bishop of Hildesheim, Germany |
| 12 May | 31.8 | Ordained Bishop | Antonio Maria Franci † | Bishop of Grosseto, Italy |
| 47.7 | Ordained Bishop | Michele Palma † | Archbishop of Chieti, Italy |
| 48.5 | Ordained Bishop | Andreas Venditti (Vinditti) † | Bishop of Polignano (Polinianum), Italy |
| 15 May | | Born | Salvator Giuseppe Mammeli † | Roma | Bishop-Elect of Alghero, Italy |
| 16 May | | Born | Thomas Johann Kaspar von Thun und Hohenstein † | Trento | Bishop of Passau, Germany |
| 18 May | 56.4 | Appointed | James O’Gallagher † | Bishop of Kildare and Leighlin, Ireland |
| 19 May | 44.3 | Ordained Bishop | Giuseppe Luigi de Andujar, O.P. † | Bishop of Bobbio, Italy | Bishop of Tortona, Italy |
| 23 May | 59.9 | Died | Juan José de Escalona y Calatayud † | Bishop of Michoacán, México |
| Born | Alexandre da Sagrada Familia Ferreira da Silva, O.F.M. † | Horta | Bishop of Angra, Portugal |
| 2 Jun | 40.6 | Ordained Bishop | Louis-Marie de Suarès d’Aulan † | Bishop of Acqs (Dax), France | Bishop Emeritus |
| 4 Jun | 53.8 | Selected | Jakob Sigismund von Reinach-Steinbrunn † | Bishop of Basel, Switzerland |
| 7 Jun | 62.9 | Confirmed | Johann Anton von Freyberg-Hopferau † | Bishop of Eichstätt, Germany |
| 50.2 | Appointed | Costantino Serra, C.R.S. † | Bishop of Noli, Italy | Bishop of Albenga, Italy |
| 9 Jun | 55.4 | Ordained Bishop | Antoni Sebastian Dembowski † | Bishop of Płock, Poland | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 10 Jun | 50.2 | Ordained Bishop | Costantino Serra, C.R.S. † | Bishop of Noli, Italy | Bishop of Albenga, Italy |
| 12 Jun | 46.2 | Appointed | Francesco Lanfreschi † | Bishop of Gaeta, Italy | Archbishop of Acerenza e Matera, Italy |
| 15 Jun | 29.5 | Ordained Priest | Jean-Baptiste-Joseph de Méallet de Fargues † | Priest | Bishop of Saint-Claude, France |
| 22.9 | Ordained Priest | Giovanni Evangelista Stefanini † | Priest | Bishop of Città della Pieve, Italy |
| 18 Jun | 21.6 | Professed | Anselmo (Nicolò) Cattich, O.F.M. † | Member of Order of Friars Minor | Bishop of Trebinje e Mrkan, Bosnia and Herzegovina |
| 21 Jun | | Born | Franciscus de Paula Paternò Castello † | Cataniae | Titular Bishop of Europus |
| 23 Jun | 54.3 | Appointed | Tomás Montaño y Aarón † | Bishop of Antequera, Oaxaca, México |
| 30 Jun | 46.3 | Ordained Bishop | Francesco Lanfreschi † | Bishop of Gaeta, Italy | Archbishop of Acerenza e Matera, Italy |