| Date | Age | Event | Bishop | Title | Current Title |
| unknown | 23.0 | Ordained Priest | Pierre-François-Gabriel-Raymond-Ignace-Ferdinand de Bausset-Roquefort † | Priest | Archbishop of Aix (-Arles-Embrun), France |
| 28.0 | Ordained Priest | Edmund Burke † | Priest | Vicar Apostolic of Nova Scotia, Canada |
| 68.7 | Died | Francesco Antonio Deplano † | Bishop of Iglesias, Italy |
| 80.4 | Died | Gerolamo Formagliari † | Bishop Emeritus of Todi, Italy |
| 47.2 | Resigned | Józef Michał Ignacy Franciszek Olędzki, Sch. P. † | Auxiliary Bishop of Kyiv and Chernihiv (Kijów and Czernihow), Ukraine | Auxiliary Bishop Emeritus |
| 24.4 | Ordained Priest | Antoine-Xavier Maynaud de Pancemont † | Priest | Bishop of Vannes, France |
| 56.7 | Resigned | Carlo Rezzonico (Jr.) † | Archpriest of the Arcibasilica di San Giovanni in Laterano {Saint John Lateran Basilica} | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 69.6 | Died | Tommaso Agostino de Simone † | Bishop of Montepeloso, Italy |
| 56.4 | Died | Raffaele Tosti † | Bishop of Fondi (Fundi), Italy |
| 63.3 | Appointed | Francesco Saverio de Zelada † | Archpriest of the Arcibasilica di San Giovanni in Laterano {Saint John Lateran Basilica} | Cardinal, Archivist of the Vatican Secret Archives |
| 6 Jan | | Born | János Hám † | Gyöngyös | Bishop of Satu Mare {Szatmár}, Romania |
| 11 Jan | 73.5 | Died | Juan Bautista Cervera, O.F.M. † | Bishop of Cádiz, Spain |
| 12 Jan | 89.3 | Died | Richard Challoner † | Vicar Apostolic of London District, England, Great Britain |
| 54.5 | Succeeded | James Robert Talbot † | Vicar Apostolic of London District, England, Great Britain |
| 13 Jan | 62.7 | Died | Raymund Anton von Strasoldo † | Bishop of Eichstätt, Germany |
| 14 Jan | 57.1 | Ordained Bishop | Luis Tomás Esteban de Pińa y Mazo, O.S.B. † | Bishop of Yucatán (Mérida), México |
| 46.5 | Ordained Bishop | Franciszek Ksawery Rydzyński † | Titular Bishop of Nilopolis | Bishop of Chelmno (Culma, Kulm), Poland |
| 21 Jan | 22.0 | Ordained Priest | Alois Jozef Krakowski von Kolowrat † | Priest | Archbishop of Praha {Prague}, Czech Republic |
| 22 Jan | | Born | Francesco Faldi † | Trasasso | Bishop Emeritus of Fabriano e Matelica, Italy |
| 62.4 | Died | Henri-Marie-Bernardin de Rosset de Ceilhes de Fleury † | Archbishop of Cambrai, France |
| 24 Jan | 26.5 | Ordained Priest | Józef Arnulf Giedroyc † | Priest | Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 82.9 | Died | Pierre-Jules-César de Rochechouard-Montigny † | Bishop Emeritus of Bayeux, France |
| 27 Jan | | Born | Tommaso Bellacosa † | Naples | Bishop Emeritus of Cava e Sarno, Italy |
| 28 Jan | 45.4 | Selected | Jérôme-Marie Champion de Cicé † | Archbishop of Bordeaux, France | Archbishop of Aix, France |
| 42.2 | Selected | Ferdinand-Maximilien-Mériadec de Rohan-Guémené † | Archbishop of Cambrai, France | Archbishop Emeritus |
| 60.0 | Died | Jan Maurycy von Strachwitz † | Apostolic Administrator of Wrocław (Breslau), Poland |
| 9 Feb | | Born | Tomás Díez de Bedoya, O.F.M. Cap. † | Sanlúcar de Barrameda | Auxiliary Bishop of Santiago de Compostela, Spain |
| 11 Feb | 68.2 | Ordained Bishop | Paolo Francesco Antamori † | Cardinal, Bishop of Orvieto, Italy |
| 23.2 | Ordained Deacon | Jozef Bélik † | Deacon | Bishop of Spiš, Slovakia |
| 14 Feb | | Born | Walenty Maciej Tomaszewski † | Łęczyca | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 15 Feb | | Born | Giovanni Maria Visconte Proto, O.S.B. † | Milazzo | Bishop of Cefalů, Italy |
| 16 Feb | 42.1 | Appointed | José Calvo, O.P. † | Vicar Apostolic of Fo-Kien, China |
| 42.1 | Appointed | José Calvo, O.P. † | Titular Bishop of Meloë in Lycia | Vicar Apostolic of Fo-Kien, China |
| 18 Feb | 34.7 | Ordained Bishop | Louis-François-Alexandre de Jarente de Senas d’Orgeval † | Titular Bishop of Olba | Bishop Emeritus of Orléans, France |
| 54.9 | Ordained Bishop | Roque Martín Merino † | Bishop of Teruel, Spain |
| 55.1 | Ordained Bishop | Santiago Palmero Escada † | Bishop of Badajoz, Spain |
| 20 Feb | | Born | Pietro Saggioli † | Gavinana | Bishop of Montepulciano, Italy |
| 21 Feb | 80.1 | Died | Bonaventura Bernardi † | Bishop of Ossero (Osor), Croatia |
| 24 Feb | 81.0 | Died | Domenico Giordani † | Titular Patriarch of Antiochia {Antioch} | Bishop Emeritus of Teano, Italy |
| 39.9 | Ordained Bishop | Antonio Maria Sacconi, O.F.M. † | Titular Bishop of Domitiopolis | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 25 Feb | 32.4 | Ordained Bishop | Felix von Stubenberg † | Titular Bishop of Tanagra | Auxiliary Bishop of Eichstätt, Germany |
| 3 Mar | | Born | Juan Antonio Ignacio Fernández Peńa y Angulo † | Mérida | Archbishop of Caracas, Santiago de Venezuela |
| 10 Mar | 23.6 | Ordained Priest | Pietro Balducci † | Priest | Bishop of Fabriano e Matelica, Italy |
| 23.3 | Ordained Priest | Jozef Bélik † | Priest | Bishop of Spiš, Slovakia |
| 23.6 | Ordained Priest | Francesco Vincenzo Lombard † | Priest | Bishop of Susa, Italy |
| 24.3 | Ordained Priest | Jean-Baptiste-François-Nicolas Millaux † | Priest | Bishop of Nevers, France |
| 24.2 | Ordained Priest | Isidoro Spanň † | Priest | Auxiliary Bishop of Mazara del Vallo, Italy |
| 22.8 | Ordained Priest | Vincenzo Torrusio † | Priest | Bishop of Nola, Italy |
| 31.2 | Ordained Priest | José Valério da Cruz, C.O. † | Priest of Confederation of Oratorians of St. Philip Neri | Bishop of Portalegre, Portugal |
| 11 Mar | 45.9 | Ordained Bishop | Johann Leopold von Hay † | Bishop of Hradec Králové, Czech Republic |
| 15 Mar | | Born | José da Assunçăo Vieira, O.F.M. † | Requeizo | Bishop-Elect of Lamego, Portugal |
| 21 Mar | 50.1 | Died | Antoni Maciej Sierakowski † | Bishop of Inflanty (Livonia)-Pilten, Poland |
| 24 Mar | 64.6 | Died | Giuseppe Du Mesnil † | Bishop of Volterra, Italy |
| 69.9 | Succeeded | Alessandro Galletti † | Bishop of Volterra, Italy |
| 25 Mar | 77.0 | Died | Francesco Gaetano Incontri † | Archbishop of Firenze {Florence}, Italy |
| 41.2 | Ordained Priest | Vincenzo Manni † | Priest | Bishop of Tivoli, Italy |
| 26 Mar | 49.0 | Ordained Bishop | Georgius Powslowski † | Titular Bishop of Alalis | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 27 Mar | | Born | Kaspar de Carl ab Hobenbalken † | Tarasp | Bishop of Chur, Switzerland |
| 65.3 | Selected | Johann Anton von Zehmen † | Bishop of Eichstätt, Germany |
| 31 Mar | 76.4 | Died | Franz Heinrich Wendelin von Kageneck † | Auxiliary Bishop Emeritus of Eichstätt, Germany |
| 2 Apr | 56.4 | Installed | Vincenzo Maria Altieri † | Cardinal-Deacon of San Giorgio in Velabro | |
| 68.4 | Installed | Paolo Francesco Antamori † | Cardinal-Priest of Sant’Alessio | Cardinal, Bishop of Orvieto, Italy |
| 65.8 | Appointed | Antoni Wacław Betański † | Coadjutor Bishop of Przemyśl, Poland | Bishop |
| 65.8 | Appointed | Antoni Wacław Betański † | Titular Bishop of Troas | Bishop of Przemyśl, Poland |
| 74.8 | Appointed | Carlo Camuzi † | Titular Patriarch of Antiochia {Antioch} | Bishop Emeritus of Capodistria (Capo d’Istria)(Koper), Slovenia |
| 53.8 | Appointed | Paolo Giuseppe Castelli Piratini † | Titular Bishop of Targa |
| 45.6 | Confirmed | Jérôme-Marie Champion de Cicé † | Archbishop of Bordeaux, France | Archbishop of Aix, France |
| 37.6 | Appointed | Francesco Maria d’Este † | Titular Bishop of Anastasiopolis | Bishop of Reggio Emilia, Italy |
| 50.8 | Appointed | Pál László Esterházy † | Bishop of Pécs, Hungary |
| 54.3 | Appointed | Giovanni Logorezzi † | Bishop of Pult, Albania | Bishop of Sapë, Albania |
| 51.1 | Installed | Giovanni Ottavio Manciforte Sperelli † | Cardinal-Priest of Santa Maria in Trastevere | Cardinal, Titular Archbishop of Teodosia |
| 45.6 | Appointed | Franciscus Carolus Palma † | Auxiliary Bishop of Kalocsa, Hungary |
| 45.6 | Appointed | Franciscus Carolus Palma † | Titular Bishop of Colophon | Auxiliary Bishop of Kalocsa, Hungary |
| 42.4 | Confirmed | Ferdinand-Maximilien-Mériadec de Rohan-Guémené † | Archbishop of Cambrai, France | Archbishop Emeritus |
| 45.3 | Appointed | Charles Colbert Seignelay de Castle Hill † | Bishop of Rodez, France | Bishop Emeritus |
| 5 Apr | 22.7 | Ordained Priest | Pedro Valera y Jiménez † | Priest | Archbishop of Santo Domingo, Dominican Republic |
| 14 Apr | 24.2 | Ordained Priest | Abbon-Pierre-François Bonnel de la Brageresse † | Priest | Bishop Emeritus of Viviers, France |
| 25.2 | Ordained Priest | Francesco Antonio Mondelli † | Priest | Bishop of Cittŕ di Castello, Italy |
| 22 Apr | 45.3 | Ordained Bishop | Charles Colbert Seignelay de Castle Hill † | Bishop of Rodez, France | Bishop Emeritus |
| 14 May | 63.0 | Died | Salvatore Pisano † | Bishop of Patti, Italy |
| 19 May | 41.2 | Resigned | Maciej Grzegorz Garnysz † | Auxiliary Bishop of Włocławek (Kujawy, Kalisze), Poland | Bishop of Chełm, Poland |
| 20 May | 55.3 | Ordained Bishop | Francisco Cuadrillero Mota † | Bishop of Mondońedo, Spain |
| 22.6 | Ordained Deacon | Marcin von Siemieński † | Deacon of Kraków, Poland | Auxiliary Bishop of Gniezno e Poznań, Poland |
| 25 May | | Born | Dionisio-Andrea Pasio † | Sant'Egidio | Bishop of Alessandria (della Paglia), Italy |
| 27 May | 37.7 | Ordained Bishop | Francesco Maria d’Este † | Titular Bishop of Anastasiopolis | Bishop of Reggio Emilia, Italy |
| 2 Jun | | Born | János Sztankovits † | Léva | Bishop of Győr (Raab), Hungary |
| 3 Jun | 24.0 | Ordained Priest | Salvador de Sanmartin y Cuevas † | Priest | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 5 Jun | 51.3 | Died | Giovanni Ottavio Manciforte Sperelli † | Cardinal, Titular Archbishop of Teodosia |
| 9 Jun | | Born | Alessandro d’Angennes † | Torino | Archbishop of Vercelli, Italy |
| 23.1 | Ordained Priest | Giovanni Battista de Martino di Pietradoro † | Priest | Bishop of Telese o Cerreto Sannita, Italy |
| 23.7 | Ordained Priest | Teresio Maria Carlo Vittorio Ferrero della Marmora † | Priest of Torino {Turin}, Italy | Cardinal, Bishop Emeritus of Saluzzo, Italy |
| 12 Jun | 63.2 | Died | Antonio Macarulla Minguilla de Aguilain † | Bishop of Durango, México |
| 20 Jun | | Appointed | Richard O’Reilly † | Coadjutor Bishop of Kildare and Leighlin, Ireland | Archbishop of Armagh, Ireland |
| Appointed | Richard O’Reilly † | Titular Bishop of Oropus | Archbishop of Armagh, Ireland |
| 83.0 | Died | Giuseppe Filippo Porporato † | Bishop of Saluzzo, Italy |
| 22 Jun | | Born | Giovanni Giuseppe Canali † | Cesano | Bishop Emeritus of Ferentino, Italy |
| 25 Jun | | Confirmed | Parsegh Petros IV Avkadian † | Patriarch of Cilicia (Armenian), Lebanon |
| 40.5 | Appointed | Ignatius Batthyány † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| Appointed | Jason Junosza Smogorzewski † | Archbishop of Kyiv-Halyč {Kiev} (Ruthenian), Ukraine |
| 37.4 | Appointed | Jan Chryzostom Kaczkowski † | Auxiliary Bishop of Lutsk and Zhytomyr (Łuck and Zytomierz), Ukraine |
| 37.4 | Appointed | Jan Chryzostom Kaczkowski † | Titular Bishop of Chariopolis | Auxiliary Bishop of Lutsk and Zhytomyr (Łuck and Zytomierz), Ukraine |
| 45.5 | Appointed | László Kollonitz † | Bishop of Oradea Mare {Gran Varadino, Nagyvárad}, Romania | Archbishop of Kalocsa, Hungary |
| 61.2 | Appointed | Antonio Martini † | Archbishop of Firenze {Florence}, Italy |
| 42.0 | Appointed | Anton Ferdinand von Rothkirch und Panthen † | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 42.0 | Appointed | Anton Ferdinand von Rothkirch und Panthen † | Titular Bishop of Paphus | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 64.5 | Appointed | Simon Spalatin † | Bishop of Ossero (Osor), Croatia |
| 27 Jun | 70.3 | Died | Johann Mathäus Schweiberer † | Auxiliary Bishop of Praha {Prague}, Czech Republic |