| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Joseph VI Audu † | Alkosch | Patriarch of Babylon {Babilonia} (Chaldean), Iraq |
| 54.0 | Resigned | Alexandre-Joseph-Alexis de Bruyère de Chalabre † | Bishop of Saint-Omer, France | Bishop Emeritus |
| 89.0 | Died | Jan Dembowski † | Auxiliary Bishop Emeritus of Włocławek (Kujawy, Kalisze), Poland |
| Born | Tommaso Feeny † | Crossboyne | Bishop of Killala, Ireland |
| 80.5 | Died | Luigi del Giudice, O.S.B. † | Archbishop of Chieti, Italy |
| 77.9 | Died | Agostino Gorgoni † | Bishop of Castro di Puglia, Italy |
| 22.2 | Ordained Priest | José Calixto Orihuela Valderrama, O.S.A. † | Priest of Order of St. Augustine | Bishop Emeritus of Cuzco, Peru |
| 17.3 | Professed | Justo Santa María de Oro y Albarracín, O.P. † | Member of Order of Friars Preachers | Bishop of San Juan de Cuyo, Argentina |
| 62.9 | Died | Giacinto Rolfi, O.S.A. † | Bishop of Iglesias, Italy |
| Born | Antonio Clemens Scisman † | Constantinople | Bishop of Ancira (Angora) (Armenian), Turkey |
| Born | Giovanni Topich, O.F.M. † | | Bishop Emeritus of Shkodrë (Scutari), Albania |
| Born | Daniel Vaughan † | | Bishop of Killaloe, Ireland |
| 3 Jan | 48.0 | Ordained Bishop | Jean-René Asseline † | Bishop of Boulogne (-Sur-Mer), France |
| 55.2 | Ordained Bishop | Giuseppe Bertieri, O.A.D. † | Bishop of Como, Italy | Bishop of Pavia, Italy |
| 43.3 | 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 |
| 14 Jan | | Born | Giuseppe Durguth † | Ürmény | Auxiliary Bishop of Esztergom, Hungary |
| 17 Jan | | Ordained Bishop | Marcelino José Da Silva † | Bishop of Macau, China | Bishop Emeritus |
| 23.0 | Ordained Priest | Pál Mátyás Szutsits † | Priest | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 23 Jan | 50.8 | Ordained Bishop | Franc Jožef Mikolič (Mikolitsch) † | Titular Bishop of Gratianopolis | Auxiliary Bishop of Ljubljana, Slovenia |
| 26 Jan | 75.1 | Died | Jean-Félix-Henri de Fumel † | Bishop of Lodève, France |
| 63.6 | Died | James Robert Talbot † | Vicar Apostolic of London District, England, Great Britain |
| 29 Jan | 45.6 | Resigned | Vinzenz Joseph Franz Sales von Schrattenbach † | Bishop of Lavant, Slovenia | Bishop of Brno, Czech Republic |
| 30 Jan | 68.6 | Died | Anton Zlatarić † | Bishop of Beograd (-Smederevo), Serbia |
| 1 Feb | | Born | Benedetto D’Acquisto, O.F.M. † | Monreale | Archbishop of Monreale, Italy |
| 2 Feb | 58.7 | Ordained Deacon | Tommaso Antici † | Deacon | |
| 4 Feb | 49.4 | Selected | Ferdinand Kindermann † | Bishop of Litoměřice, Czech Republic |
| 5 Feb | | Born | Francesco Leone de Aguirre † | S. Lorenzo della Barranca | Bishop-Elect of La Paz, Bolivia |
| Born | Patrick Durcan † | Kilmactigue | Bishop of Achonry, Ireland |
| 12 Feb | 58.3 | Died | Franciscus Kornis de Goncz-Ruszka † | Auxiliary Bishop of Győr (Raab), Hungary |
| 20 Feb | 52.8 | Appointed | Joseph Ernest Gandolph von Kuenburg † | Bishop of Lavant, Slovenia |
| 21 Feb | | Born | Pedro Ignacio de Benavente y del Castillo † | Lima | 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 | 47.1 | 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 | 73.7 | Died | Lourenço de Lencastre † | Bishop of Leiria, Portugal |
| 13 Mar | 52.8 | Ordained Bishop | Joseph Ernest Gandolph von Kuenburg † | Bishop of Lavant, Slovenia |
| 17 Mar | 71.5 | Died | José Escalzo Miguel, O.S.B. † | Bishop of Cádiz, Spain |
| 20 Mar | 24.2 | Ordained Priest | Louis-Guillaume-Valentin Dubourg, P.S.S. † | Priest of Society of Priests of Saint Sulpice | Archbishop of Besançon, France |
| 27.7 | Ordained Priest | Daniel Eliasz Ostrowski † | Priest | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 61.4 | Ordained Deacon | Fernando Spinelli † | Deacon | Cardinal, Cardinal-Deacon of Santa Maria in Cosmedin |
| 24.9 | Ordained Deacon | Augustin-Sulpice Zen-Ruffinen † | Deacon of Sion {Sitten}, Switzerland | Bishop |
| 28 Mar | 56.7 | 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 |
| 66.2 | Appointed | Juan Alvarez Castro † | Bishop of Coria, Spain |
| 62.3 | Appointed | José Constancio Andino † | Bishop of Osma, Spain |
| 54.4 | Appointed | Giovanni Andrea Avogadro † | Bishop of Verona, Italy | Bishop Emeritus |
| 66.0 | Appointed | Agustín Benito Torres, O. Carm. † | Bishop of Albarracin, Spain |
| 63.1 | Appointed | Salvador Bienpica y Sotomayor † | Bishop of Tlaxcala, México |
| 49.5 | Appointed | Cayetano Da Annunciação Brandão, T.O.R. † | Archbishop of Braga, Portugal |
| 72.3 | Appointed | Nicolaus d’Ambrosio † | Titular Bishop of Philomelium |
| 43.0 | Appointed | Francisco de Cuerda † | Bishop of Puerto Rico (Porto Rico) | Bishop Emeritus |
| 43.0 | Appointed | Giacinto della Torre, O.S.A. † | Archbishop of Sassari, Italy | Archbishop of Torino {Turin}, Italy |
| 47.4 | Appointed | Andreas Joseph Fahrmann † | Auxiliary Bishop of Würzburg, Germany |
| 47.4 | Appointed | Andreas Joseph Fahrmann † | Titular Bishop of Halmiros | Auxiliary Bishop of Würzburg, Germany |
| Appointed | Anselmo José de Fraga y Márquez † | Bishop of Santa Marta, Colombia |
| 49.5 | Confirmed | Ferdinand Kindermann † | Bishop of Litoměřice, Czech Republic |
| 58.2 | Appointed | Francesco Paolo Perremuto, O.S.B. † | Archbishop of Messina, Italy |
| 58.1 | Appointed | Antonio José Salinas y Moreno, O.F.M. † | 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 |
| 47.2 | 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.S.A. † | Santa María de Vigo, Spain | Bishop of Nueva Segovia, Philippines |
| 3 Apr | 22.8 | Ordained Priest | Giuseppe Vincenzo Airenti, O.P. † | Priest of Order of Friars Preachers | Archbishop of Genova, Italy |
| 25.0 | Ordained Priest | Augustin-Sulpice Zen-Ruffinen † | Priest of Sion {Sitten}, Switzerland | Bishop |
| 22.3 | Ordained Deacon | Franciszek Ksawery Zglenicki † | Deacon | Auxiliary Bishop of Kraków, Poland |
| 4 Apr | 58.3 | Died | Jean-Baptiste-Charles-Marie de Beauvais † | Bishop Emeritus of Senez, France |
| 65.3 | Resigned | Tadeusz Teodozy Rostocki, O.S.B.M. † | Bishop of Chełm (Ruthenian), Poland | Archbishop of Kyiv-Halyč {Kiev} (Ruthenian), Ukraine |
| 5 Apr | | Born | Cornelius Richard Antoon van Bommel † | Leyden | Bishop of Liège, Belgium |
| 6 Apr | 54.4 | Ordained Bishop | Giovanni Andrea Avogadro † | 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 | 64.2 | Died | Mariano Zaralli, O.F.M. † | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 17 Apr | | Born | Rodrigo Moreno Echevarría y Briones, O.S.B. † | San Millán de la Cogolla | Bishop of Segovia, Spain |
| May | 81.1 | Died | Nicolò Cicirelli † | Bishop of Gravina (di Puglia), Italy |
| 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.S.A. † | Archbishop of Sassari, Italy | Archbishop of Torino {Turin}, Italy |
| 3 May | | Born | José Agustín Domínguez y Díaz † | Zaachila | Bishop of Antequera, Oaxaca, México |
| 9 May | 66.3 | Ordained Bishop | Juan Alvarez Castro † | Bishop of Coria, Spain |
| 16 May | 66.2 | 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 |
| 56.0 | Ordained Bishop | Valentin Philipp Anton Schmidt † | Titular Bishop of Thermae Basilicae | Auxiliary Bishop of Speyer, Germany |
| 17 May | 56.2 | Died | Matthew Gibson † | Vicar Apostolic of Northern District, England, Great Britain |
| 23 May | 19.1 | Professed | Francesco Saverio Pescetto, O.C.D. † | Member of Order of Discalced Carmelites | Titular Archbishop of Sardes |
| 29 May | 13.8 | Ordained Priest | Evasio Secundo Agodino † | Priest | Bishop of Aosta, Italy |
| 23.9 | Ordained Priest | Eustachio Dentice, C.R. † | Priest | Archbishop of Manfredonia (e Vieste), Italy |
| 26.8 | Ordained Priest | Augustin de Mailhet de Vachères † | 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 | Auxiliary Bishop of Płock, Poland |
| 22.9 | Ordained Deacon | Ignatz Albert (Joseph Ignatz Alexius) von Riegg, O.S.A. † | Deacon of Order of St. Augustine | Bishop of Augsburg, Germany |
| 26.9 | Ordained Priest | Luigi Tosi † | Priest | Bishop of Pavia, Italy |
| 3 Jun | | Born | Manuel José Pardio Lizama † | Mérida | Auxiliary Bishop of Yucatán (Mérida), México |
| 4 Jun | 47.4 | Selected | Tymoteusz Pawel von Gorzeński † | Bishop of Smoleńsk, Poland | Archbishop of Gniezno e Poznań, Poland |
| 82.3 | Died | Louis-Albert de Lezay-Marnesia † | Bishop Emeritus of Evreux, France |
| 6 Jun | 23.2 | Ordained Priest | Konstanty Wincenty Plejewski † | Priest | Auxiliary Bishop of Płock, Poland |
| 8 Jun | 64.5 | Appointed | Jose Martinez Palomino y Lopez de Lorena † | Abbot | Bishop Emeritus of Chiapas (Ciudad Real de Chiapas), México |
| 11 Jun | 61.3 | Died | Josephus Korytkowski † | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 14 Jun | | Born | Giuseppe Trama † | Napoli | 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 † | Rennes | Bishop of Angers, France |
| 21 Jun | 47.0 | Appointed | Agustín Iñigo Abad Lasierra, O.S.B. † | Bishop of Barbastro, Spain |
| 38.5 | Appointed | Manuel de Aguiar † | Bishop of Leiria, Portugal |
| 43.5 | Appointed | Manoel de Almeida de Carvalho † | Bishop of Belém do Pará, Brazil |
| 52.2 | Appointed | Miklós Milassin, O.F.M. † | Bishop of Székesfehérvár (Albareale), Hungary |
| 46.6 | Appointed | Cayetano Peña 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 |
| 47.4 | Confirmed | Joseph Konrad von Schroffenberg, C.R.S.A. † | Bishop of Freising, Germany |
| 47.4 | Confirmed | Joseph Konrad von Schroffenberg, C.R.S.A. † | Bishop of Regensburg, Germany | Bishop of Freising, Germany |
| 23 Jun | 74.6 | Died | Johann Anton von Zehmen † | Bishop of Eichstätt, Germany |
| 26 Jun | | Born | Vincent Scarpa † | Este | Bishop-Elect of Belluno e Feltre, Italy |
| 28 Jun | 49.8 | Installed | Cayetano Da Annunciação Brandão, T.O.R. † | Archbishop of Braga, Portugal |
| Born | Jozef Kunszt † | Zubrohlaván | Archbishop of Kalocsa, Hungary |