| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 49.1 | Ordained Bishop | Pedro Cáceres Casado † | Bishop of Astorga, Spain |
| Died | Joseph-Pierre de Castellane † | Bishop of Fréjus, France |
| 45.9 | Ordained Bishop | Francisco Castillo Vintimilla † | Bishop of Barcelona, Spain | Bishop of Jaén, Spain |
| Appointed | Arcangelo Maria Ciccarelli, O.P. † | Archbishop (Personal Title) of Ugento, Italy | Bishop |
| Died | Francesco Andrea Correa, Sch. P. † | Bishop of Ripatransone, Italy |
| 52.0 | Appointed | Pietro Antonio Corsignani † | Bishop of Sulmona, Italy |
| Appointed | Domenico De Pace † | Archbishop of Lanciano, Italy |
| 64.0 | Died | Stanisław Józef Hozjusz † | Bishop of Poznań, Poland |
| 36.0 | Appointed | Daniel-Bertrand de Langle † | Bishop of Saint-Papoul, France |
| Died | Matteo Odierna, O.S.B. † | Bishop of Sulmona, Italy |
| 55.1 | Resigned | Domenico Silvio Passionei † | Apostolic Nuncio to Austria | Cardinal, Librarian of the Vatican Library |
| 55.9 | Ordained Bishop | Francisco Pérez Lozano, O.S.Bas. † | Bishop of Puerto Rico (Porto Rico) |
| Appointed | Giovanni Rossi † | Archbishop of Taranto, Italy | Archbishop of Acerenza e Matera, Italy |
| Died | Giulio Sacchi † | Bishop of Monopoli, Italy |
| Appointed | Waclaw Hieronim Sierakowski † | Bishop of Inflanty (Livonia), Poland | Archbishop of Lviv, Ukraine |
| Died | Sebastiano Venier † | Bishop of Vicenza, Italy |
| 8 Jan | 49.5 | Died | Francesco Maria Garetto, O.F.M. † | Coadjutor Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 11 Jan | | Born | Andrej (André) Szabó † | Alsomjek | Bishop of Košice, Slovakia |
| 12 Jan | 33.0 | Ordained Bishop | Charles-Prudent de Becdelièvre † | Bishop of Nimes, France |
| 39.0 | Ordained Bishop | Antoine-René de La Roche de Fontenille † | Bishop of Meaux, France |
| 20 Jan | | Born | Ippolito Antonio Vincenti Mareri † | Rieti | Cardinal, Bishop of Sabina, Italy |
| 25 Jan | 77.1 | Died | Jean-Marie Henriau † | Bishop of Boulogne (-Sur-Mer), France |
| 27 Jan | 44.2 | Appointed | Miguel Aguiar † | Bishop of Ceuta, Spain |
| 49.2 | Appointed | Pedro Cáceres Casado † | Bishop of Astorga, Spain |
| 53.6 | Appointed | Ramón Francisco Agustín Eura, O.S.A. † | Bishop of Orense, Spain |
| 52.2 | Appointed | Andrés Mayoral Alonso de Mella † | Archbishop of Valencia, Spain |
| 53.7 | Appointed | José Esteban Noriega, O. Praem. † | Bishop of Solsona, Spain |
| 44.9 | Appointed | Carlo della Torre Rezzonico † | Cardinal-Deacon of S. Nicola in Carcere | Pope (Roma {Rome}, Italy) |
| 31 Jan | | Born | Tiberio Cortese † | Modena | Bishop of Modena, Italy |
| 2 Feb | | Born | William Gibson † | Stonecroft | Vicar Apostolic of Northern District, England, Great Britain |
| 45.1 | Ordained Bishop | Guillaume-Samuel de Verthamon de Chavagnac † | Bishop of Luçon, France |
| 6 Feb | | Born | Antonio De Rossi † | | Bishop of Veroli, Italy |
| 9 Feb | 79.8 | Died | Fabio Olivieri † | Cardinal, Cardinal-Deacon of Ss. Vito, Modesto e Crescenzia |
| 17 Feb | 50.1 | Died | Tomás Ratto Ottonelli † | Bishop of Córdoba, Spain |
| 23 Feb | | Born | Stefano Bonsignore † | Busto | Bishop of Faenza, Italy |
| 55.1 | Ordained Bishop | Jean-Baptiste de Champflour † | Bishop of Mirepoix, France |
| Ordained Bishop | Robert Lacy † | Bishop of Limerick, Ireland |
| Born | Teodozy Wislocki, O.S.Bas. † | Ronerozniec | Bishop of Foreign Diocese |
| 27 Feb | | Born | Giuseppe Gioacchino Lovera † | Torino | Bishop of Saluzzo, Italy |
| 1 Mar | | Died | Fabrizio de Capua † | Archbishop of Salerno, Italy |
| Born | Antonio Raffaele Dolci, O.P. † | Ragusa | Bishop of Stagnum |
| 2 Mar | 78.2 | Retired | Gregorio Téllez, O.F.M. Conv. † | Bishop of Ciudad Rodrigo, Spain | Bishop Emeritus |
| 3 Mar | 54.6 | Appointed | Domingo Pantaleón Álvarez de Abreu † | Bishop of Santo Domingo, Dominican Republic | Bishop of Tlaxcala, Tlaxcala, México |
| 55.4 | Appointed | Plácido Bailés Padilla, O.S.A. † | Bishop of Huesca, Spain | Bishop of Plasencia, Spain |
| 61.9 | Appointed | Clemente Comenge Avio † | Bishop of Ciudad Rodrigo, Spain |
| 54.8 | Appointed | Juan de Galabis, O. Praem. † | Archbishop of Santafé en Nueva Granada, Colombia |
| 84.0 | Appointed | José Flores Osorio † | Bishop of Cuenca, Spain |
| 63.6 | Appointed | Domenico Antonio Manfredi † | Bishop of Boiano, Italy |
| 56.1 | Appointed | Francisco Pérez Lozano, O.S.Bas. † | Bishop of Puerto Rico (Porto Rico) |
| 53.3 | Ordained Bishop | Domingo Antonio de Zatarain † | Bishop of León en Nicaragua |
| 4 Mar | 36.2 | Appointed | Auguste-César d'Hervilly de Devise † | Bishop of Boulogne (-Sur-Mer), France |
| Born | Erasmus Dionys Krieger † | Masov | Auxiliary Bishop of Praha {Prague}, Czech Republic |
| 10 Mar | 60.2 | Ordained Bishop | François du Verdier † | Bishop of Angoulême, France |
| 16 Mar | | Born | Józef Kazimierz Kossakowski † | | Coadjutor Bishop of Vilnius, Lithuania |
| 23.1 | Ordained Deacon | Urbano Paracciani Rutili † | Deacon | Cardinal, Archbishop of Fermo, Italy |
| 19 Mar | | Born | Antonio Maria Gardini † | Venezia | Bishop of Crema, Italy |
| Appointed | Francesco De Novellis † | Bishop of Sarno, Italy |
| 20 Mar | | Born | Joachim-François-Mamert de Conzié † | S. Martin du Mont | Archbishop of Tours, France |
| 21 Mar | | Appointed | Troiano Caracciolo Del Sole † | Bishop of Nola, Italy |
| 23 Mar | 23.1 | Ordained Priest | Urbano Paracciani Rutili † | Priest of Roma {Rome}, Italy | Cardinal, Archbishop of Fermo, Italy |
| 25 Mar | 23.1 | Ordained Priest | Adam Dwerditsch † | Priest of Wien, Austria | Auxiliary Bishop |
| 31 Mar | 52.3 | Installed | Andrés Mayoral Alonso de Mella † | Archbishop of Valencia, Spain |
| 2 Apr | 70.8 | Died | Charles-Joachim Colbert de Croissy † | Bishop of Montpellier, France |
| 4 Apr | 71.7 | Died | José Luis Palos Bord, O.F.M. † | Bishop of Paraguay |
| 7 Apr | | Born | Francisco Ramón Larumbre † | Lumbier | Bishop of Tudela, Spain |
| 23.5 | Ordained Priest | Christoph Bartholomäus Anton Migazzi Von Waal Und Sonnenthurn † | Priest of Trento, Italy | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 27.1 | Ordained Priest | Johann Mathäus Schweiberer † | Priest of Praha {Prague}, Czech Republic | Auxiliary Bishop |
| 20 Apr | 44.5 | Ordained Bishop | Miguel Aguiar † | Bishop of Ceuta, Spain |
| 53.9 | Ordained Bishop | José Esteban Noriega, O. Praem. † | Bishop of Solsona, Spain |
| 21 Apr | | Appointed | Francisco Gutiérrez Galeano, O. de M. † | Auxiliary Bishop of Lima, Peru |
| 22 Apr | 48.5 | Appointed | Georges-Lazare Berger de Charancy † | Bishop of Montpellier, France |
| 26 Apr | 74.6 | Resigned | Tommaso Ruffo † | Archbishop of Ferrara, Italy | Cardinal, Archbishop Emeritus |
| Born | Melchor Serrano Lázaro, Sch. P. † | Bádenas | Auxiliary Bishop of Valencia, Spain |
| 27 Apr | 53.8 | Ordained Bishop | Ramón Francisco Agustín Eura, O.S.A. † | Bishop of Orense, Spain |
| 1 May | 65.9 | Died | Felipe Molina y Figueroa † | Bishop of Nueva Caceres, Philippines |
| 4 May | 62.1 | Ordained Bishop | Clemente Comenge Avio † | Bishop of Ciudad Rodrigo, Spain |
| 5 May | 56.4 | Appointed | Andrés Cabrejas Molina † | Bishop of Jaén, Spain |
| 56.0 | Appointed | Jorge Casado Torreblanca † | Bishop of Urgell, Spain | Bishop Emeritus |
| 68.2 | Appointed | Raniero d'Elci † | Archbishop of Ferrara, Italy | Cardinal, Cardinal-Bishop of Ostia (-Velletri) |
| 43.5 | Appointed | Melchiorre Delfico † | Bishop of Muro Lucano, Italy |
| 49.8 | Appointed | Juan Elías Gómez Terán † | Bishop of Orihuela, Spain |
| 34.1 | Appointed | Francesco Gaetano Incontri † | Bishop of Pescia, Italy | Archbishop of Firenze {Florence}, Italy |
| 57.0 | Appointed | Manuel Isidro Orozco Manrique de Lara † | Archbishop of Santiago de Compostela, Spain |
| Appointed | Casimiro Rossi † | Archbishop of Salerno, Italy |
| 61.3 | Appointed | Pedro Salazar Góngora † | Bishop of Córdoba, Spain |
| 11 May | 43.5 | Ordained Bishop | Melchiorre Delfico † | Bishop of Muro Lucano, Italy |
| 34.1 | Ordained Bishop | Francesco Gaetano Incontri † | Bishop of Pescia, Italy | Archbishop of Firenze {Florence}, Italy |
| 17 May | | Born | Louis Charrier de La Roche † | Lyon | Bishop of Versailles, France |
| Born | Tomás de Roa y Alarcón † | Quilpolemu | Bishop of Concepción, Chile |
| 19 May | 39.1 | Appointed | José de Peralta Barrionuevo y Rocha Benavídez, O.P. † | Bishop of Buenos Aires, Argentina | Bishop of La Paz, Bolivia |
| 20 May | 45.4 | Appointed | Camillo Paolucci † | Apostolic Nuncio to Austria | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 21 May | 47.2 | Appointed | Francesco Lanfreschi † | Archbishop of Acerenza e Matera, Italy | Archbishop Emeritus |
| 1 Jun | 36.4 | Ordained Bishop | Louis-Albert Joly de Choin † | Bishop of Toulon, France |
| 3 Jun | 55.7 | Ordained Bishop | Plácido Bailés Padilla, O.S.A. † | Bishop of Huesca, Spain | Bishop of Plasencia, Spain |
| 56.5 | Ordained Bishop | Andrés Cabrejas Molina † | Bishop of Jaén, Spain |
| 56.1 | Ordained Bishop | Jorge Casado Torreblanca † | Bishop of Urgell, Spain | Bishop Emeritus |
| 6 Jun | | Born | Marco Zaguri † | Venezia | Bishop of Vicenza, Italy |
| 23 Jun | 62.4 | Died | Ascanio Argelati † | Bishop of Città della Pieve, Italy |
| 61.8 | Resigned | Pedro Ayala, O.P. † | Bishop of Avila, Spain | Bishop Emeritus |
| 68.3 | Elevated to Cardinal | Raniero d'Elci † | Cardinal, Cardinal-Bishop of Ostia (-Velletri) |
| 71.3 | Appointed | Carlo Maria Marini † | Cardinal-Deacon of Ss. Vito, Modesto e Crescenzia | Cardinal, Cardinal-Deacon of S. Maria in Via Lata |
| 55.6 | Elevated to Cardinal | Domenico Silvio Passionei † | Cardinal, Librarian of the Vatican Library |
| 39.2 | Confirmed | José de Peralta Barrionuevo y Rocha Benavídez, O.P. † | Bishop of Buenos Aires, Argentina | Bishop of La Paz, Bolivia |
| 47.3 | Appointed | Narciso Queralt † | Bishop of Avila, Spain |
| 27 Jun | 43.1 | Appointed | Krzysztof Michal Dobinski † | Auxiliary Bishop of Gniezno, Poland |
| 43.1 | Appointed | Krzysztof Michal Dobinski † | Titular Bishop of Serra | Auxiliary Bishop of Gniezno, Poland |
| 29 Jun | 49.9 | Ordained Bishop | Juan Elías Gómez Terán † | Bishop of Orihuela, Spain |
| 54.9 | Ordained Bishop | Jakob Sigismund von Reinach-Steinbrunn † | Bishop of Basel, Switzerland |
| 61.5 | Ordained Bishop | Pedro Salazar Góngora † | Bishop of Córdoba, Spain |