| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Joannes Bapt. Belland † | Viennen | Titular Bishop of Messene |
| 58.3 | Died | Joannes Cuppari † | Bishop of Trogir (Traù), Croatia |
| Born | Jean-François Dondel † | Vannes | Bishop of Dol, France |
| Born | Xaverius Giustiniani † | Chien | Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 66.4 | Ordained Bishop | Martín de Híjar y Mendoza, O.S.A. † | Bishop of Concepción, Chile |
| Born | Charles-Guy Le Borgne de Kermorvan † | Léon | Bishop of Tréguier, France |
| 67.0 | Resigned | José de Lencastre, O. Carm. † | Bishop of Leiria, Portugal | Bishop Emeritus |
| Born | Jacques Le Févre du Quesnoy † | Golleville | Bishop of Coutances, France |
| 27.9 | Ordained Priest | Johann Franz Riccius † | Priest of Strasbourg, France | Auxiliary Bishop |
| Born | Alexander Smith † | Fochabers, Moray | Vicar Apostolic of Lowland District, Scotland, Great Britain |
| 56.5 | Died | Romualdo Tancredi, O.S.B. † | Bishop of Montalcino, Italy |
| Died | Cyprianus Zochowski † | Archbishop of Kyiv-Halyč {Kiev} (Ruthenian), Ukraine |
| Jan | 74.1 | Died | Giulio Giacomo Castellani, O.S.A. † | Bishop of Cagli, Italy |
| 52.3 | Died | Giaconto Tuartkovich, O.F.M. † | Bishop of Stagno (Ston), Croatia |
| 3 Jan | 40.0 | Ordained Bishop | Joachim-Joseph d’Estaing de Saillans † | Bishop of Saint-Flour, France |
| 44.4 | Ordained Bishop | Georg Sigismund von Sinnersberg † | Titular Bishop of Nicopolis ad Iaterum | Auxiliary Bishop of Trento, Italy |
| 48.0 | Ordained Bishop | Jean-Baptiste de Verthamon † | Bishop of Pamiers, France |
| 4 Jan | 57.8 | Appointed | Pedro Pacheco, O.P. † | Bishop of Cochin, India |
| 38.3 | Confirmed | Lothar Franz von Schönborn † | Bishop of Bamberg, Germany | Archbishop of Mainz, Germany |
| 10 Jan | 46.0 | Ordained Bishop | Augustin de Maupeou † | Bishop of Castres, France | Archbishop of Auch, France |
| 17 Jan | 45.6 | Ordained Bishop | Daniel de Francheville † | Bishop of Périgueux (Vesuna), France |
| 18 Jan | 22.1 | Selected | Joseph Clemens von Bayern von Wittelsbach † | Coadjutor Bishop of Hildesheim, Germany | Archbishop of Köln {Cologne}, Germany |
| 23 Jan | 49.1 | Selected | William Dalton (Daton) † | Bishop of Ossory, Ireland |
| 36.1 | Selected | Richard Piers † | Bishop of Waterford and Lismore, Ireland | Bishop Emeritus |
| 24 Jan | 39.1 | Ordained Bishop | Jacques des Maretz † | Bishop of Riez, France | Archbishop of Auch, France |
| 59.1 | Died | Antonio de Sangro, C.R. † | Bishop of Troia, Italy |
| 25 Jan | 58.1 | Appointed | Isidoro Aparici Gilart † | Auxiliary Bishop of Valencia, Spain |
| 58.1 | Appointed | Isidoro Aparici Gilart † | Titular Bishop of Croae | Auxiliary Bishop of Valencia, Spain |
| 37.5 | Appointed | Francesco Maria Federico Carafa, C.R. † | Bishop of San Marco (Argentano), Italy | Bishop of Nola, Italy |
| 54.7 | Appointed | Alessandro Ciceri, S.J. † | Bishop of Nanking [Nanjing], China |
| 48.2 | Appointed | Bernardino Plastina, O.M. † | Bishop of Oppido Mamertina, Italy |
| 25.0 | Ordained Priest | Pablo Vilana Perlas † | Priest | Archbishop of Salerno, Italy |
| 30 Jan | 25.4 | Ordained Priest | Andrea Luigi Cattani † | Priest | Bishop of San Miniato, Italy |
| 31 Jan | 37.5 | Ordained Bishop | Francesco Maria Federico Carafa, C.R. † | Bishop of San Marco (Argentano), Italy | Bishop of Nola, Italy |
| 48.2 | Ordained Bishop | Bernardino Plastina, O.M. † | Bishop of Oppido Mamertina, Italy |
| 50.3 | Ordained Bishop | António de Saldanha † | Bishop of Portalegre, Portugal | Bishop of Guarda, Portugal |
| 1 Feb | 73.3 | Died | Jean Louis d’Elderen † | Bishop of Liège, Belgium |
| Born | Giuseppe Spinelli † | Naples | Cardinal, Cardinal-Bishop of Ostia |
| 6 Feb | | Born | Johann Joseph von Wratislaw von Mitrowitz † | Deschna | Bishop of Hradec Králové, Czech Republic |
| 8 Feb | 51.1 | Appointed | John Dempsy † | Bishop of Kildare and Leighlin, Ireland |
| 30.7 | Appointed | Antonio Giustiniani † | Bishop of Syros (e Milos), Greece | Archbishop of Naxos, Greece |
| 52.1 | Confirmed | Laurentius Fergusius Lea † | Bishop of Derry, Ireland |
| 51.1 | Appointed | Gaspar Alonso Valerià y Aloza, O.F.M. † | Bishop of Solsona, Spain | Bishop of Lérida, Spain |
| 11 Feb | 69.8 | Died | Johann Daniel von Gudenus † | Auxiliary Bishop of Mainz, Germany |
| 13 Feb | 86.1 | Died | Léon Bacoué, O.F.M. † | Bishop Emeritus of Glandèves, France |
| 14 Feb | 36.1 | Ordained Bishop | Louis Milon † | Bishop of Condom, France |
| 51.1 | Ordained Bishop | Gaspar Alonso Valerià y Aloza, O.F.M. † | Bishop of Solsona, Spain | Bishop of Lérida, Spain |
| 18 Feb | | Born | Valentín Moran Menéndez, O. de M. † | Cabruña, Spain | Bishop Emeritus of Islas Canarias {Canary Islands}, Spain |
| 78.4 | Died | Giuseppe Saggese † | Bishop of Ravello e Scala, Italy |
| 74.1 | Installed | Kazimierz Szczuka † | Bishop of Chelmno (Culma, Kulm), Poland |
| 19 Feb | 72.1 | Died | Gennaro Sanfelice † | Archbishop of Cosenza, Italy |
| 24 Feb | 24.6 | Ordained Priest | Marco Antonio de Rosa † | Priest | Bishop of Policastro, Italy |
| 25 Feb | 47.1 | Ordained Bishop | Mathieu Ysoré d’Hervault † | Archbishop of Tours, France |
| 1 Mar | 34.2 | Appointed | Gianfrancesco Bembo, C.R.S. † | Bishop of Belluno, Italy |
| 5 Mar | | Born | Hernando Eusebio Oscot y Colombres, O.P. † | Las Llanas, Spain | Auxiliary Bishop of Fo-Kien, China |
| 6 Mar | 24.1 | Ordained Priest | Joseph-Louis de Cahorne de La Palun † | Priest | Bishop of Vaison, France |
| 27.8 | Ordained Priest | Luigi Forni † | Priest | Bishop Emeritus of Reggio Emilia, Italy |
| 24.7 | Ordained Priest | Gaston-Jean-Baptiste-Louis de Noailles † | Priest | Bishop of Chalons-sur-Marne, France |
| 24.1 | Ordained Priest | Domenico Rossi † | Priest | Bishop of Vulturara e Montecorvino, Italy |
| 7 Mar | 34.2 | Ordained Bishop | Gianfrancesco Bembo, C.R.S. † | Bishop of Belluno, Italy |
| 10 Mar | | Born | Isidro de Arevalo † | Cebu | Bishop of Nueva Caceres, Philippines |
| 70.4 | Died | Joannes Paulus Inurea, O.S.B. † | Bishop of Ajaccio, France |
| 14 Mar | | Born | José Ignacio Rodríguez Cornejo † | Almonacid | Bishop of Plasencia, Spain |
| 15 Mar | 57.5 | Appointed | Francesco Azzolini † | Bishop of Ripatransone, Italy |
| 40.2 | Appointed | Luigi (Ludovico) Capuano (de Capua) † | Bishop of Ravello e Scala, Italy | Bishop of Gravina (di Puglia), Italy |
| 39.2 | Appointed | Eligio Caracciolo, C.R. † | Archbishop of Cosenza, Italy |
| 40.2 | Appointed | Armand Wiktoryn Cieszeyko, O.P. † | Bishop of Bacău, Romania |
| 21 Mar | 57.5 | Ordained Bishop | Francesco Azzolini † | Bishop of Ripatransone, Italy |
| 40.2 | Ordained Bishop | Luigi (Ludovico) Capuano (de Capua) † | Bishop of Ravello e Scala, Italy | Bishop of Gravina (di Puglia), Italy |
| 39.2 | Ordained Bishop | Eligio Caracciolo, C.R. † | Archbishop of Cosenza, Italy |
| 22 Mar | 35.8 | Died | Gaetano de Castillo, C.R. † | Bishop of Lipari, Italy |
| 24 Mar | 65.2 | Died | Didacus Ros de Medrano † | Bishop of Orense, Spain |
| 59.3 | Selected | Pietro de Torres † | Archbishop of Trani, Italy |
| 26 Mar | | Died | José Sanchis i Ferrandis, O. de M. † | Archbishop of Tarragona, Spain |
| 27 Mar | 34.3 | Ordained Priest | Orazio Filippo Spada † | Priest | Cardinal, Bishop of Osimo, Italy |
| 30 Mar | | Born | Blas Roldán, O.S.H. † | Arganda del Rey | Bishop of Segorbe, Spain |
| 4 Apr | 22.3 | Selected | Joseph Clemens von Bayern von Wittelsbach † | Bishop of Liège, Belgium | Archbishop of Köln {Cologne}, Germany |
| 5 Apr | | Born | Ciro de Alteriis † | Napoli | Bishop of Acerra, Italy |
| 45.0 | Died | Diego Ibáñez de la Madrid y Bustamente † | Bishop of Ceuta, Spain |
| 10 Apr | 51.3 | Selected | Armand de Montmorin de Saint-Hérem † | Archbishop of Vienne, France |
| 51.3 | Selected | Séraphin de Pajot de Plouy † | Bishop of Die, France |
| 16 Apr | | Born | Francesco Guidi † | Volterra | Archbishop of Pisa, Italy |
| 18 Apr | 49.3 | Ordained Bishop | Charles de Villeneuve de Vence † | Bishop of Glandèves, France |
| 19 Apr | 39.8 | Appointed | Didacus Álvares † | Archbishop of Cranganore (Angamala), India | Archbishop Emeritus |
| 30.7 | Appointed | Emilio Giacomo Cavaliere, C.P.O. † | Bishop of Troia, Italy |
| 65.3 | Appointed | Benedetto Luperti † | Bishop of Cagli, Italy |
| Born | Adamus Emericus Majthenyi Kesseloko † | Szeniczien | Titular Bishop of Esbus |
| 59.3 | Appointed | Juan Queipo de Llano y Valdés † | Archbishop of La Plata o Charcas, Bolivia |
| 20 Apr | 82.3 | Died | Giovanni Carlo Antonelli † | Bishop of Ferentino, Italy |
| 25 Apr | 65.3 | Ordained Bishop | Benedetto Luperti † | Bishop of Cagli, Italy |
| 28 Apr | 52.3 | Died | Michel Phélypeaux de La Vrillière † | Archbishop of Bourges, France |
| May | 50.3 | Died | Alfonso de Aloysio † | Bishop of Squillace, Italy |
| 1 May | 23.2 | Ordained Priest | Arcangelo Maria Ciccarelli, O.P. † | Priest of Order of Friars Preachers | Bishop Emeritus of Ugento, Italy |
| 2 May | 58.3 | Ordained Bishop | Isidoro Aparici Gilart † | Titular Bishop of Croae | Auxiliary Bishop of Valencia, Spain |
| 30.8 | Ordained Bishop | Emilio Giacomo Cavaliere, C.P.O. † | Bishop of Troia, Italy |
| 4 May | 33.9 | Died | Ludwig Anton von Rhein zu Neuburg † | Bishop-Elect of Worms, Germany |
| 6 May | | Born | Isidoro Pitellia, O.M. † | Fluminis Frigidi | Bishop of Termoli, Italy |
| 9 May | 57.4 | Ordained Bishop | Louis-Marie Pidou de Saint-Olon, C.R. † | Bishop of Baghdad, Iraq |
| Born | Nicola Stanislavich, O.F.M. † | Craioven Vallachiae | Bishop of Csanád, Hungary |
| 11 May | 45.2 | Died | Aleksandar Ignacije Mikulić Brokunovečki † | Bishop of Zagreb (Agram), Croatia |
| 15 May | 59.4 | Died | Eustache Le Séneschal de Carcado † | Bishop of Tréguier, France |
| 16 May | 24.0 | Ordained Priest | Antonio Bianchi di Gennaro, O.F.M. † | Priest of Order of Friars Minor | Bishop of Mottola (Motula), Italy |
| 17 May | | Confirmed | François Chevalier de Saulx † | Bishop of Alès (Alais), France |
| 39.7 | Confirmed | Charles-Madeleine Frézeau de Frèzelière † | Bishop of La Rochelle, France |
| 49.9 | Appointed | Savo (Savio) Millini (Mellini) † | Archbishop (Personal Title) of Nepi e Sutri, Italy | Cardinal, Bishop |
| 22 May | 72.4 | Died | Ignatius Fiumi, O.P. † | Bishop of Polignano (Polinianum), Italy |
| 27 May | | Born | Franciscus Antonius de los Reyes † | Brundusin | Bishop of Oria, Italy |
| 29 May | 51.4 | Selected | Olivier Jégou de Kervilio † | Bishop of Tréguier, France |
| 30 May | 45.9 | Installed | Daniel de Francheville † | Bishop of Périgueux (Vesuna), France |
| Jun | 74.4 | Died | Giulio Vincenzo Gentile, O.P. † | Archbishop of Genova, Italy |
| 1 Jun | 22.5 | Confirmed | Joseph Clemens von Bayern von Wittelsbach † | Coadjutor Bishop of Hildesheim, Germany | Archbishop of Köln {Cologne}, Germany |
| 3 Jun | 57.4 | Died | Nilo Catalani, O.S.B.M. † | Archbishop of Durrës (Durazzo) (Albanian), Albania |
| 51.8 | Died | Johann Friedrich von Waldstein † | Archbishop of Praha {Prague}, Czech Republic |
| 4 Jun | 52.3 | Died | Albert van Hornes † | Bishop of Gent {Ghent, Gand}, Belgium |
| 5 Jun | 24.1 | Ordained Priest | Nicola Cani, O.P. † | Priest of Order of Friars Preachers | Bishop of Bosa, Italy |
| 27.3 | Ordained Priest | Jean-Louis Cotyon de La Bourdonnaye † | Priest | Bishop of Saint-Pol-de-Léon, France |
| 25.4 | Ordained Priest | Jean-Louis du Bouschet de Sourches † | Priest | Bishop of Dol, France |
| 24.8 | Ordained Priest | Domenico De Pace † | Priest | Archbishop of Lanciano, Italy |
| 24.4 | Ordained Priest | Konstanty Moszynski, O.S.P. † | Priest | Bishop of Inflanty (Livonia)-Pilten, Poland |
| 22.9 | Ordained Priest | Gioacchino Maria Oldo, O. Carm. † | Priest of Order of Our Lady of Mt. Carmel | Bishop of Terracina, Priverno e Sezze, Italy |
| 24.1 | Ordained Priest | Gennaro Scalea † | Priest | Bishop of San Severo, Italy |
| 24.5 | Ordained Priest | Alessandro Zondadari † | Priest | Archbishop of Siena, Italy |
| 8 Jun | 29.9 | Appointed | Franz Ludwig am Rhein zu Neuburg † | Bishop of Worms, Germany | Archbishop-Elect of Mainz, Germany |
| 10 Jun | | Born | Octavius Antonius Baiardi † | Parma | Titular Archbishop of Tyrus |
| 13 Jun | | Born | Antônio de Nossa Senhora do Desterro Malheiro, O.S.B. † | Viana de Lima, Portugal | Bishop of São Sebastião do Rio de Janeiro, Brazil |
| 16 Jun | 57.7 | Died | Francesco Azzolini † | Bishop of Ripatransone, Italy |
| Born | Scipione de’ Lorenzi † | Napoli | Bishop of Larino, Italy |
| 72.5 | Died | Costanzo Zani, O.S.B. † | Bishop of Imola, Italy |
| 17 Jun | 64.7 | Died | Philip Thomas Howard of Norfolk, O.P. † | Cardinal, Cardinal-Priest of Santa Maria sopra Minerva |
| Died | Johann Stieff von Kränzen † | Auxiliary Bishop of Gurk, Austria |
| 21 Jun | 48.5 | Appointed | Valeriano Chierichelli † | Bishop of Ferentino, Italy | Bishop Emeritus |
| 51.3 | Appointed | Rodrigo de Moura Telles † | Bishop of Guarda, Portugal | Archbishop of Braga, Portugal |
| 24 Jun | 78.5 | Died | Carlo Stefano Anastasio Ciceri † | Cardinal, Bishop of Como, Italy |
| 27 Jun | 48.5 | Ordained Bishop | Valeriano Chierichelli † | Bishop of Ferentino, Italy | Bishop Emeritus |
| 39.8 | Ordained Bishop | Charles-Madeleine Frézeau de Frèzelière † | Bishop of La Rochelle, France |
| 30 Jun | 74.5 | Died | Kazimierz Szczuka † | Bishop of Chelmno (Culma, Kulm), Poland |