| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Joseph VI Audu † | | Patriarch of Babylon {Babilonia} (Chaldean), Iraq |
| 25.1 | Ordained Priest | Adolphus Louis Barth de Walbach † | Priest | Former Bishop-Elect of Philadelphia, Pennsylvania, USA |
| Appointed | Cyrille Benham Bischara Abtal † | Bishop of Mossul (Syrian), Iraq |
| Ordained Bishop | Cyrille Benham Bischara Abtal † | Bishop of Mossul (Syrian), Iraq |
| 51.0 | Appointed | José Calvo, O.P. † | Vicar Apostolic of Fukien, Chekiang, and Kiangsi, China |
| 41.5 | Resigned | Antonio Dugnani † | Apostolic Nuncio to France | Cardinal, Prefect of the Apostolic Signatura |
| Born | Thomas Feeny † | | Bishop of Killala, Ireland |
| 80.4 | Died | Luigi del Giudice, O.S.B. † | Archbishop of Chieti, Italy |
| 77.8 | Died | Agostino Gorgoni † | Bishop of Castro di Puglia, Italy |
| 25.9 | Ordained Priest | Joaquín López y Sicilia † | Priest | Archbishop of Valencia, Spain |
| 20.0 | Professed | Charles Francis McDonnel, O.F.M. Rec. † | Member of Order of Friars Minor Recollect | Priest |
| 30.0 | Ordained Priest | Peter McLaughlin † | Priest | Bishop of Derry, Ireland |
| 21.7 | Ordained Priest | Daniel Murray † | Priest | Archbishop of Dublin, Ireland |
| 22.2 | Ordained Priest | José Calixto Orihuela Valderrama, O.E.S.A. † | Priest of Order of Hermits of St. Augustine | Bishop Emeritus of Cuzco, Peru |
| 17.3 | Professed | Justo de Santa María de Oro y Albarracín, O.P. † | Member of Order of Friars Preachers | Bishop of San Juan de Cuyo, Argentina |
| Appointed | Rafael d’Ossery, O.C.D. † | Vicar Apostolic of Sweden | Vicar Apostolic Emeritus |
| Removed | Nicolas Oster † | Vicar Apostolic of Sweden | Vicar Apostolic Emeritus |
| Born | Antonio Clemens Scisman (Chichemanian) † | | Bishop of Ancira (Angora) (Armenian), Turkey |
| 18.2 | Professed | Filip Felicjan Szumborski, O.S.B.M. † | Member of Basilian Order of Saint Josaphat (Order of St. Basil the Great) | Bishop of Chełm and Bełz (Ukrainian), Poland |
| Born | Giovanni Giorgio Topich, O.F.M. Obs. † | | Bishop Emeritus of Shkodrë (Scutari), Albania |
| 3 Jan | 48.0 | Ordained Bishop | Jean-René Asseline † | Bishop of Boulogne (-Sur-Mer), France |
| 55.1 | Ordained Bishop | Giuseppe Bertieri, O.A.D. † | Bishop of Como, Italy | Bishop of Pavia, Italy |
| 43.2 | Ordained Bishop | Jean-Charles de Coucy † | Bishop of La Rochelle, France | Archbishop of Reims, France |
| 53.4 | Ordained Bishop | Charles-François d’Aviau Du Bois-de-Sanzay † | Archbishop of Vienne, France | Archbishop of Bordeaux, France |
| 4 Jan | 72.8 | Died | Antonio Bucci † | Titular Bishop of Orthosias in Caria |
| 14 Jan | | Born | József Durguth † | | Auxiliary Bishop of Esztergom, Hungary |
| 17 Jan | 40.9 | Ordained Bishop | Marcelino José Da Silva † | Bishop of Macau, China | Bishop Emeritus |
| 23.0 | Ordained Priest | Pál Mátyás (Matija Pavao) Szutsits (Sučić) † | Priest | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 19 Jan | 51.7 | Selected | Miklós Milassin, O.F.M. Obs. † | Bishop of Székesfehérvár (Albareale), Hungary |
| 23 Jan | 50.8 | Ordained Bishop | Franc Joef Mikolič (Mikolitsch) † | Titular Bishop of Gratianopolis | Auxiliary Bishop of Ljubljana, Slovenia |
| 24 Jan | 63.5 | Died | James Robert Talbot † | Vicar Apostolic of London District, England, Great Britain |
| 26 Jan | 75.0 | Died | Jean-Félix-Henri de Fumel † | Bishop of Lodčve, France |
| 29 Jan | 45.6 | Resigned | Vincenz Joseph Franz Sales von Schrattenbach † | Bishop of Lavant, Slovenia | Bishop of Brno, Czechia |
| 30 Jan | 68.6 | Died | Anton Zlatarić † | Bishop of Beograd (-Smederevo), Serbia |
| 1 Feb | | Born | Benedetto D’Acquisto, O.F.M. Ref. † | | Archbishop of Monreale, Italy |
| 2 Feb | 58.7 | Ordained Deacon | Tommaso Antici † | Deacon | |
| 4 Feb | 49.3 | Selected | Ferdinand Kindermann von Schulstein † | Bishop of Litoměřice, Czechia |
| 5 Feb | | Born | Francisco de Paula León de Aguirre Velasco † | | Former Bishop-Elect of La Paz, Bolivia |
| Born | Patrick Durcan † | | Bishop of Achonry, Ireland |
| 7 Feb | 57.9 | Ordained Bishop | Giuseppe Gregorio (Josip Grgur) Scotti † | Bishop of Nona (Nin), Croatia | Archbishop of Zadar (Zara), Croatia |
| 12 Feb | 58.2 | Died | Franciscus Kornis de Göncz-Ruszka † | Auxiliary Bishop of Győr (Raab), Hungary |
| 19 Feb | 77.3 | Ceased | Dominique de La Rochefoucauld † | Abbot of Cluny, France | Cardinal, Archbishop of Rouen, France |
| 20 Feb | 59.8 | Died | Antun Belglava (Belgravia) † | Bishop of Trogir (Traů), Croatia |
| 52.7 | Selected | Joseph Ernest Gandolph von Kuenburg † | Bishop of Lavant, Slovenia |
| 21 Feb | | Born | Pedro Ignacio de Benavente y del Castillo † | | Auxiliary Bishop of Lima, Peru |
| 27 Feb | 24.0 | Ordained Priest | Carlo Pio Ravasi, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Adria, Italy |
| 22.8 | Ordained Priest | Camillo Giovanni Rossi † | Priest | Bishop Emeritus of San Severo, Italy |
| 1 Mar | 47.0 | Selected | Joseph Konrad von Schroffenberg, C.R.S.A. † | Bishop of Freising, Germany |
| 2 Mar | 60.6 | Died | Francisco López Sánchez † | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 4 Mar | 73.6 | Died | Lourenço de Lencastre † | Bishop of Leiria, Portugal |
| 7 Mar | 52.8 | Confirmed | Joseph Ernest Gandolph von Kuenburg † | Bishop of Lavant, Slovenia |
| 13 Mar | 51.3 | Ordained Bishop | Ignatius Darabanth, O.S.B.M. † | Bishop of Oradea Mare {Gran Varadino} (Romanian), Romania |
| 14 Mar | 52.8 | Ordained Bishop | Joseph Ernest Gandolph von Kuenburg † | Bishop of Lavant, Slovenia |
| 17 Mar | 71.4 | Died | José Escalzo y Miguel, O.S.B. † | Bishop of Cádiz, Spain |
| 20 Mar | 24.1 | Ordained Priest | Louis-Guillaume-Valentin Dubourg, P.S.S. † | Priest of Society of Priests of Saint Sulpice | Archbishop of Besançon, France |
| 27.6 | Ordained Priest | Daniel Eliasz Ostrowski † | Priest | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 61.3 | Ordained Deacon | Fernando Spinelli † | Cardinal-Deacon of Sant’Angelo in Pescheria | Cardinal, Cardinal-Deacon of Santa Maria in Cosmedin |
| 24.9 | Ordained Deacon | Augustin-Sulpice Zen-Ruffinen † | Deacon of Sion {Sitten}, Switzerland | Bishop |
| 26 Mar | 21.6 | Solemn Vows | Edward Dominic Fenwick, O.P. † | Member of Order of Friars Preachers | Bishop of Cincinnati, Ohio, USA |
| 28 Mar | 56.6 | Ordained Deacon | Ludovico Flangini Giovanelli † | Deacon | Cardinal, Patriarch of Venezia {Venice}, Italy |
| 29 Mar | 47.5 | Appointed | Francisco Mateo Aguiriano Gómez † | Bishop of Calahorra y La Calzada, Spain |
| 66.1 | Appointed | Juan Alvarez Castro † | Bishop of Coria, Spain |
| 62.2 | Appointed | José Constancio Andino † | Bishop of Osma, Spain |
| 54.4 | Appointed | Giovanni Andrea Avogadro, S.J. † | Bishop of Verona, Italy | Bishop Emeritus |
| 66.0 | Appointed | Agustín Benito Torres, O. Carm. † | Bishop of Albarracin, Spain |
| 63.1 | Appointed | Salvador Biempica y Sotomayor † | Bishop of Tlaxcala (Puebla de los Angeles), México |
| 49.5 | Confirmed | Cayetano Da Annunciaçăo Brandăo, T.O.R. † | Archbishop of Braga, Portugal |
| 72.3 | Appointed | Nicolaus d’Ambrosio † | Titular Bishop of Philomelium |
| 42.9 | Appointed | Francisco de Cuerda † | Bishop of Puerto Rico (Porto Rico) | Bishop Emeritus |
| 43.0 | Confirmed | Giacinto della Torre, O.E.S.A. † | Archbishop of Sassari, Italy | Archbishop of Torino {Turin}, Italy |
| 47.3 | Appointed | Andreas Joseph Fahrmann † | Auxiliary Bishop of Würzburg, Germany |
| 47.3 | Appointed | Andreas Joseph Fahrmann † | Titular Bishop of Halmiros | Auxiliary Bishop of Würzburg, Germany |
| 51.9 | Appointed | Anselmo José de Fraga y Márquez † | Bishop of Santa Marta, Colombia |
| 49.5 | Confirmed | Ferdinand Kindermann von Schulstein † | Bishop of Litoměřice, Czechia |
| 58.2 | Confirmed | Francesco Paolo Perremuto, O.S.B. † | Archbishop of Messina, Italy |
| 58.0 | Appointed | Antonio José Salinas y Moreno, O.F.M. Obs. † | Bishop of Tortosa, Spain |
| 55.8 | Appointed | Valentin Philipp Anton Schmidt † | Auxiliary Bishop of Speyer, Germany |
| 55.8 | Appointed | Valentin Philipp Anton Schmidt † | Titular Bishop of Thermae Basilicae | Auxiliary Bishop of Speyer, Germany |
| 30 Mar | 26.3 | Died | Eusebio Luciano Carvalho Gomes da Silva, C.M. † | Bishop-Elect of Nanking [Nanjing], China |
| 47.1 | Selected | Joseph Konrad von Schroffenberg, C.R.S.A. † | Bishop of Regensburg, Germany | Bishop of Freising, Germany |
| 1 Apr | | Born | Vicente Barreiro y Pérez, O.E.S.A. † | | Bishop of Nueva Segovia, Philippines |
| 3 Apr | 22.7 | Ordained Priest | Giuseppe Vincenzo Airenti, O.P. † | Priest of Order of Friars Preachers | Archbishop of Genova, Italy |
| 57.6 | Appointed | Porifiriusz Skarbek-Ważyński, O.S.B.M. † | Bishop of Chełm and Bełz (Ukrainian), Poland |
| 24.9 | Ordained Priest | Augustin-Sulpice Zen-Ruffinen † | Priest of Sion {Sitten}, Switzerland | Bishop |
| 22.3 | Ordained Deacon | Franciszek Ksawery Zglenicki † | Deacon of Kraków, Poland | Auxiliary Bishop |
| 4 Apr | 58.3 | Died | Jean-Baptiste-Charles-Marie de Beauvais † | Bishop Emeritus of Senez, France |
| 65.2 | Resigned | Tadeusz Teodozy Rostocki, O.S.B.M. † | Bishop of Chełm and Bełz (Ukrainian), Poland | Archbishop of Kyiv-Halyč {Kiev} (Ukrainian), Ukraine |
| 5 Apr | | Born | Cornelius Richard Antoon van Bommel † | | Bishop of Ličge, Belgium |
| 6 Apr | 54.4 | Ordained Bishop | Giovanni Andrea Avogadro, S.J. † | Bishop of Verona, Italy | Bishop Emeritus |
| 58.2 | Ordained Bishop | Francesco Paolo Perremuto, O.S.B. † | Archbishop of Messina, Italy |
| 10 Apr | 84.7 | Died | Antonio Maria Franci † | Bishop of Grosseto, Italy |
| 16 Apr | | Appointed | Pasquale Orlandini, O.F.M. Ref. † | Vicar Apostolic of Smirne, Turkey |
| 64.1 | Died | Mariano Zaralli, O.F.M. Obs. † | Vicar Apostolic of Hukwang, Shansi [Shanxi], and Shensi [Shaanxi], China |
| 17 Apr | | Born | Rodrigo Moreno Echevarría y Briones, O.S.B. † | | Bishop of Segovia, Spain |
| 1 May | 24.0 | Ordained Priest | Vincenzo-Maria Armentano, O.P. † | Priest of Order of Friars Preachers | Bishop of Mileto, Italy |
| 2 May | 43.1 | Ordained Bishop | Giacinto della Torre, O.E.S.A. † | Archbishop of Sassari, Italy | Archbishop of Torino {Turin}, Italy |
| 3 May | | Born | José Agustín Domínguez y Díaz † | | Bishop of Antequera, Oaxaca, México |
| 5 May | 38.3 | Selected | Manuel de Aguiar † | Bishop of Leiria, Portugal |
| 43.3 | Selected | Manoel de Almeida de Carvalho † | Bishop of Belém do Pará, Brazil |
| 7 May | 81.1 | Died | Nicolň Cicirelli † | Bishop of Gravina (di Puglia), Italy |
| 9 May | 66.2 | Ordained Bishop | Juan Alvarez Castro † | Bishop of Coria, Spain |
| 16 May | 66.1 | Ordained Bishop | Agustín Benito Torres, O. Carm. † | Bishop of Albarracin, Spain |
| 47.5 | Ordained Bishop | Andreas Joseph Fahrmann † | Titular Bishop of Halmiros | Auxiliary Bishop of Würzburg, Germany |
| 55.9 | Ordained Bishop | Valentin Philipp Anton Schmidt † | Titular Bishop of Thermae Basilicae | Auxiliary Bishop of Speyer, Germany |
| 17 May | 56.1 | Died | Matthew Gibson † | Vicar Apostolic of Northern District, England, Great Britain |
| 23 May | 19.0 | Professed | Francesco Saverio (di Sant’Anna) Pescetto, O.C.D. † | Member of Order of Discalced Carmelites | Vicar Apostolic Emeritus of Verapoly, India |
| 29 May | 13.7 | Ordained Priest | Evasio Secundo Agodino † | Priest | Bishop of Aosta, Italy |
| 23.8 | Ordained Priest | Eustachio Dentice, C.R. † | Priest | Archbishop of Manfredonia (e Vieste), Italy |
| 26.7 | Ordained Priest | Augustin de Mailhet de Vachčres † | Priest | Bishop of Tulle, France |
| 24.0 | Ordained Priest | Francesco Luigi Piervisani † | Priest | Bishop of Nocera Umbra, Italy |
| 23.1 | Ordained Deacon | Konstanty Wincenty Plejewski † | Deacon of Płock, Poland | Auxiliary Bishop |
| 22.8 | Ordained Deacon | Ignatz Albert (Joseph Ignatz Alexius) von Riegg, O.E.S.A. † | Deacon of Order of Hermits of St. Augustine | Bishop of Augsburg, Germany |
| 26.8 | Ordained Priest | Luigi Tosi † | Priest of Milano {Milan}, Italy | Bishop of Pavia, Italy |
| 2 Jun | 61.3 | Selected | Feliks Paweł Turski † | Bishop of Kraków, Poland |
| 3 Jun | 56.6 | Selected | Adam Stanisław Naruszewicz † | Bishop of Lutsk (Łuck), Ukraine |
| Born | Manuel José Pardio Lizama † | | Auxiliary Bishop of Yucatán (Mérida), México |
| 4 Jun | 47.3 | Selected | Tymoteusz Pawel von Gorzeński † | Bishop of Smoleńsk, Poland | Archbishop of Gniezno e Poznań, Poland |
| 82.3 | Died | Louis-Albert de Lezay-Marnézia † | Bishop Emeritus of Évreux, France |
| 6 Jun | 23.1 | Ordained Priest | Konstanty Wincenty Plejewski † | Priest of Płock, Poland | Auxiliary Bishop |
| 8 Jun | 64.4 | Appointed | Jose Martinez Palomino y Lopez de Lorena † | Abbot | Bishop Emeritus of Chiapas (Ciudad Real de Chiapas), México |
| 11 Jun | 61.2 | Died | Józef Korytowski † | Auxiliary Bishop of Gniezno, Poland |
| 14 Jun | | Born | Giuseppe Trama † | | Bishop Emeritus of Calvi e Teano, Italy |
| 61.4 | Died | Franz Melchior Joseph Zen-Ruffinen † | Bishop of Sion {Sitten}, Switzerland |
| 17 Jun | | Born | Guillaume-Laurent-Louis Angebault † | | Bishop of Angers, France |
| 21 Jun | 47.0 | Appointed | Agustín Ińigo Abad Lasierra, O.S.B. † | Bishop of Barbastro, Spain |
| 38.5 | Confirmed | Manuel de Aguiar † | Bishop of Leiria, Portugal |
| 43.4 | Confirmed | Manoel de Almeida de Carvalho † | Bishop of Belém do Pará, Brazil |
| 52.1 | Confirmed | Miklós Milassin, O.F.M. Obs. † | Bishop of Székesfehérvár (Albareale), Hungary |
| 46.5 | Appointed | Cayetano Peńa Granada † | Bishop of Huesca, Spain |
| 39.1 | Appointed | Atanasio Puyal y Poveda † | Auxiliary Bishop of Toledo, Spain | Bishop of Calahorra y La Calzada, Spain |
| 39.1 | Appointed | Atanasio Puyal y Poveda † | Titular Bishop of Carystus | Bishop of Calahorra y La Calzada, Spain |
| 47.3 | Confirmed | Joseph Konrad von Schroffenberg, C.R.S.A. † | Bishop of Freising, Germany |
| 47.3 | Confirmed | Joseph Konrad von Schroffenberg, C.R.S.A. † | Bishop of Regensburg, Germany | Bishop of Freising, Germany |
| 23 Jun | 74.5 | Died | Johann Anton von Zehmen † | Bishop of Eichstätt, Germany |
| 26 Jun | | Born | Vincenzo Scarpa † | | Bishop-Elect of Belluno e Feltre, Italy |
| 28 Jun | 49.7 | Installed | Cayetano Da Annunciaçăo Brandăo, T.O.R. † | Archbishop of Braga, Portugal |
| Born | Jozef Kunszt † | | Archbishop of Kalocsa, Hungary |