| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 56.8 | Died | Isidro de Arevalo † | Bishop of Nueva Caceres, Philippines |
| Born | Francesco Borzi † | Scutaren | Archbishop of Bar (Antivari), Montenegro |
| Born | Alexandre-Henri de Chauvigny de Blot † | Clermont | Bishop of Lombez, France |
| Born | John Connolly, O.P. † | Monknewtown, Ireland | Bishop of New York, New York, USA |
| 25.2 | Appointed | Giuseppe Garampi † | Prefect of the Vatican Secret Archives | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 51.7 | Died | Andrés Licht Barrera † | Bishop Emeritus of Guadix, Spain |
| Born | Józef Leon Łopaciński † | Leonpoli | Auxiliary Bishop Emeritus of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 28.3 | Ordained Priest | Francisco Antonio de Lorenzana y Butrón † | Priest | Cardinal, Archbishop Emeritus of Toledo, Spain |
| Born | Charles La Mothe, M.E.P. † | Sens, France | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 67.0 | Died | François-Joseph Robuste † | Auxiliary Bishop of Reims, France |
| 44.0 | Ordained Bishop | Diego Rodríguez de Rivas y Velasco † | Bishop of Comayagua, Honduras | Bishop of Guadalajara, Jalisco, México |
| 16.6 | Professed | Valentin Philipp Anton Schmidt † | Member of Society of Jesus | Auxiliary Bishop of Speyer, Germany |
| Born | Peter Waldron † | Tuam | Bishop of Killala, Ireland |
| 79.1 | Died | Giovanni Domenico Xiberras, O.S.Io.Hieros. † | Titular Bishop of Epiphania in Syria |
| 3 Jan | 49.2 | Ordained Bishop | Pedro Antonio de Barroeta Angel † | Archbishop of Lima, Peru | Archbishop of Granada, Spain |
| 6 Jan | 69.5 | Died | Octavius da Pozzo † | Bishop of Catanzaro, Italy |
| Born | François-Marie-Fortuné de Vintimille † | Marseille | Bishop Emeritus of Carcassonne, France |
| 11 Jan | 51.0 | Died | Pierre de Beaupoil de Saint-Aulaire † | Bishop of Tarbes, France |
| 14 Jan | 72.8 | Died | Juan Leandro Gómez de Parada Valdez y Mendoza † | Bishop of Guadalajara, Jalisco, México |
| 15 Jan | | Born | Pál Rosos † | Sümeg | Bishop of Veszprém, Hungary |
| 21 Jan | 25.0 | Ordained Priest | Ferdinand-Marie de Lobkowitz † | Priest | Bishop of Gent {Ghent, Gand}, Belgium |
| 24 Jan | | Born | Alfonso Aguado y Jaraba † | Villapando | Auxiliary Bishop of Toledo, Spain |
| 27 Jan | 55.0 | Resigned | Lodovico Calini † | Cardinal, Bishop of Crema, Italy |
| 29 Jan | | Appointed | Patrick Bradley, O.P. † | Bishop of Derry, Ireland | Bishop Emeritus |
| 30 Jan | | Appointed | Edmund O’Doran † | Bishop of Down and Connor, Ireland |
| Feb | | Died | Thomas MacDermot † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 1 Feb | 61.1 | Appointed | Mario Bolognetti † | Cardinal, Cardinal-Deacon of Santa Maria ad Martyres |
| 55.0 | Appointed | Lodovico Calini † | Titular Patriarch of Antiochia {Antioch} | Cardinal, Bishop of Crema, Italy |
| 45.4 | Appointed | Giovanni Angelo Ciocchi del Monte † | Archbishop of Brindisi, Italy | Archbishop Emeritus |
| 60.5 | Died | Mondilio Orsini, C.O. † | Archbishop Emeritus of Capua, Italy |
| 54.5 | Appointed | Ferdinando Maria de Rossi † | Titular Patriarch of Constantinople | Cardinal, Prefect of the Congregation of the Council |
| 61.4 | Appointed | Carlo Maria Sacripante † | Cardinal-Priest of Sant’Anastasia | Cardinal, Cardinal-Bishop of Frascati |
| 65.5 | Appointed | Fabius Troyli † | Bishop of Catanzaro, Italy |
| 2 Feb | 49.0 | Died | Pedro Pardo de Figueroa † | Archbishop of Guatemala |
| 7 Feb | 45.4 | Ordained Bishop | Giovanni Angelo Ciocchi del Monte † | Archbishop of Brindisi, Italy | Archbishop Emeritus |
| 10 Feb | 82.1 | Died | Jean d’Yse (d’Ize) de Saléon † | Archbishop of Vienne, France |
| 15 Feb | | Born | Giovanni Battista Pio Vitale † | Mondovi | Bishop of Mondovi, Italy |
| 17 Feb | 71.1 | Died | Charles-Guillaume de Maupeou † | Bishop of Lombez, France |
| 24 Feb | | Born | François Joseph Hirn † | Strasbourg | Bishop of Tournai {Doornik}, Belgium |
| 3 Mar | | Ordained Bishop | Patrick Bradley, O.P. † | Bishop of Derry, Ireland | Bishop Emeritus |
| 4 Mar | 69.1 | Died | Valentinus Alexander Czapski, O. Cist. † | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 5 Mar | 67.2 | Died | Jean-Louis Berton des Balbes de Crillon † | Archbishop of Narbonne, France |
| 6 Mar | 64.8 | Died | Johann Christoph von Crass † | Auxiliary Bishop of Paderborn, Germany |
| 48.4 | Succeeded | Giovanni Luis, S.J. † | Archbishop of Cranganore (Angamala), India |
| 75.2 | Died | Antonius Pimentel, S.J. † | Archbishop of Cranganore (Angamala), India |
| 25.2 | Ordained Priest | Ludovico Spagnoletti, O.F.M. † | Priest of Order of Friars Minor | Archbishop of Dubrovnik (Ragusa), Croatia |
| 8 Mar | | Born | Giovanni Caccia-Piatti (Cacciapiatti) † | Novara, Italy | Cardinal, Prefect of the Roman Curia - Other |
| 12 Mar | 76.5 | Resigned | Januarius Guglielmini † | Bishop of Tropea, Italy | Bishop Emeritus |
| 15 Mar | 47.8 | Appointed | Felix de Paù † | Bishop of Tropea, Italy |
| 65.2 | Appointed | Juan Francisco Guillén † | Archbishop of Burgos, Spain |
| 40.9 | Appointed | Marcantonio Lombardi † | Bishop of Crema, Italy |
| 57.1 | Appointed | Valentín Moran Menéndez, O. de M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop Emeritus |
| 37.5 | Appointed | Sebastianus a S. Margherita (Marcus Antonius) Piacentini, O.C.D. † | Bishop of Ispahan, Iran |
| 45.0 | Confirmed | Franz Konrad Kasimir Ignaz von Rodt † | Cardinal, Bishop of Konstanz {Constance}, Germany |
| 45.2 | Appointed | Stefano Gennaro Spani † | Bishop of Minervino Murge, Italy |
| 19 Mar | 47.8 | Ordained Bishop | Felix de Paù † | Bishop of Tropea, Italy |
| 46.4 | Appointed | Franz Heinrich Wendelin von Kageneck † | Auxiliary Bishop of Eichstätt, Germany | Auxiliary Bishop Emeritus |
| 46.4 | Appointed | Franz Heinrich Wendelin von Kageneck † | Titular Bishop of Comana Armeniae | Auxiliary Bishop Emeritus of Eichstätt, Germany |
| 24.1 | Ordained Priest | Emmanuel Felix Soares (de Santa Catarina), O.C.D. † | Priest of Order of Discalced Carmelites | Archbishop of Goa, India |
| 45.2 | Ordained Bishop | Stefano Gennaro Spani † | Bishop of Minervino Murge, Italy |
| 20 Mar | 78.3 | Died | Giovanni Maria de Laurentiis, O. Carm. † | Bishop of Capri, Italy |
| 21 Mar | 40.9 | Ordained Bishop | Marcantonio Lombardi † | Bishop of Crema, Italy |
| 26 Mar | | Born | Francesco Ridolfi † | Spoleto, Italy | Titular Bishop of Carystus |
| 27 Mar | 23.7 | Ordained Priest | Antonius Maria Ambiveri † | Priest | Titular Bishop of Aureliopolis in Asia |
| 22.8 | Ordained Deacon | Gaetano Maria Bonanno † | Deacon of Siracusa, Italy | Bishop |
| 24.8 | Ordained Priest | Alexander Maria Calefati † | Priest | Bishop of Oria, Italy |
| 23.0 | Ordained Priest | Saverio Marini † | Priest | Bishop of Rieti, Italy |
| 4 Apr | 37.3 | Selected | Gabriel Cortois de Quincey † | Bishop of Belley, France |
| 63.7 | Appointed | Guillaume d’Hugues de la Motte † | Archbishop of Vienne, France |
| 42.3 | Appointed | Joseph-Antoine-Jacques Richier de Cérisy † | Bishop of Lombez, France |
| 10 Apr | 22.7 | Ordained Deacon | Dominik Piotr Karwosiecki, O.F.M. Conv. † | Deacon of Order of Friars Minor Conventual | Bishop of Bacău, Romania |
| 24.6 | Ordained Priest | Franciscus Xaverius Romanelli † | Priest | Bishop of Lavello, Italy |
| 12 Apr | 74.9 | Died | Sigismund Kollonitsch † | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 46.7 | Succeeded | Johann Joseph von Trautson zu Falkenstein (Trauston) † | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 14 Apr | 64.4 | Resigned | Francesco Antonio Spadea † | Bishop of Aquino e Pontecorvo, Italy | Bishop Emeritus |
| 15 Apr | 46.5 | Ordained Bishop | Franz Heinrich Wendelin von Kageneck † | Titular Bishop of Comana Armeniae | Auxiliary Bishop Emeritus of Eichstätt, Germany |
| Died | Inácio de Santa Teresa, O.S.A. † | Bishop of Faro {Algarve}, Portugal |
| 16 Apr | 79.9 | Died | Virgilio Giannotti † | Bishop of Città della Pieve, Italy |
| 18 Apr | 22.9 | Ordained Priest | Gaetano Maria Bonanno † | Priest of Siracusa, Italy | Bishop |
| 22 Apr | 41.3 | Ordained Bishop | Nicolaus (Florentius) Szostak (a Jesu), O.C.D. † | Titular Bishop of Areopolis |
| 24 Apr | | Born | Marcos Cabello y López, O.S.A. † | Córdoba | Bishop of Guadix, Spain |
| 25 Apr | | Born | Ottavio Angelelli † | Bologna | Bishop of Gubbio, Italy |
| 57.2 | Ordained Bishop | Valentín Moran Menéndez, O. de M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop Emeritus |
| 28 Apr | 24.7 | Ordained Priest | Moyses Drágosi † | Priest | Bishop of Oradea Mare {Gran Varadino} (Romanian), Romania |
| May | 72.2 | Died | Domenico Maria de Liguori (Liguoro), C.R. † | Bishop of Cava (de’ Tirreni), Italy |
| 70.3 | Died | James O’Gallagher † | Bishop of Kildare and Leighlin, Ireland |
| 2 May | | Born | Atanasio Puyal y Poveda † | Alpera | Bishop of Calahorra y La Calzada, Spain |
| 53.5 | Died | Domenico Valguarnera, C.O. † | Bishop of Cefalù, Italy |
| 7 May | 59.3 | Resigned | Ioan Inocențiu Klein (Micu), O.S.B.M. † | Bishop of Făgăraş (Romanian), Romania | Bishop Emeritus |
| 12 May | 62.8 | Died | Cayetano Gil Taboada † | Archbishop of Santiago de Compostela, Spain |
| 14 May | | Born | Dominicus Ventapane † | Napoli | Titular Bishop of Tium |
| 17 May | 56.2 | Appointed | Carolus Franciscus Casanova † | Archbishop of Sassari, Italy |
| 54.1 | Appointed | Giuseppe Agostino Delbecchi, Sch. P. † | Bishop of Alghero, Italy | Archbishop of Cagliari, Italy |
| 55.5 | Appointed | Francisco Javier de Luna Victoria y Castro † | Bishop of Panamá | Bishop of Trujillo, Peru |
| 57.7 | Appointed | Francesco Antonio Rocco † | Bishop of Capri, Italy |
| 42.7 | Appointed | Esteban Villanova Colomer † | Bishop of Jaca, Spain | Bishop of Tarazona, Spain |
| 20 May | | Born | Andrea Mastai-Ferretti † | Senigallia | Bishop of Pesaro, Italy |
| 23 May | 54.1 | Ordained Bishop | Giuseppe Agostino Delbecchi, Sch. P. † | Bishop of Alghero, Italy | Archbishop of Cagliari, Italy |
| 57.7 | Ordained Bishop | Francesco Antonio Rocco † | Bishop of Capri, Italy |
| 5 Jun | 24.5 | Ordained Priest | Paolo Maurizio Caissotti, C.O. † | Priest of Confederation of Oratorians of St. Philip Neri | Bishop of Asti, Italy |
| 59.3 | Ordained Priest | Francesco Pacca † | Priest | Archbishop of Benevento, Italy |
| 24.4 | Ordained Priest | Paschalis Sifanni † | Priest | Titular Bishop of Tium |
| 6 Jun | | Born | Andrés Quintian Ponte de Andrade † | La Coruña, Spain | Bishop of Cuenca, Ecuador |
| 12 Jun | | Born | Sebastianus Brisciano † | Syracusa | Titular Bishop of Hippos |
| 20 Jun | 40.5 | Ordained Bishop | Miguel Anselmo Álvarez de Abreu y Valdéz † | Titular Bishop of Cisamus | Bishop of Antequera, Oaxaca, México |
| 32.8 | Appointed | Henri-Marie-Bernardin de Rosset de Ceilhes de Fleury † | Archbishop of Tours, France | Archbishop of Cambrai, France |
| 22 Jun | 25.5 | Ordained Priest | Francisco de São Simão, O.F.M. † | Priest of Order of Friars Minor | Bishop of Santiago de Cabo Verde |
| 26 Jun | 50.8 | Died | Paulo Maria Mariotti † | Bishop of Sagone (Sagona), France |
| 28 Jun | 54.1 | Installed | Antônio da Madre de Deus Galvão, O.F.M. † | Bishop of São Paulo, Brazil |
| 29 Jun | 24.4 | Ordained Priest | József Batthyány † | Priest of Esztergom, Hungary | Cardinal, Archbishop |
| 46.9 | Installed | Johann Joseph von Trautson zu Falkenstein (Trauston) † | Cardinal, Archbishop of Wien {Vienna}, Austria |
| 42.9 | Ordained Bishop | Esteban Villanova Colomer † | Bishop of Jaca, Spain | Bishop of Tarazona, Spain |