| Date | Age | Event | Bishop | Title | Current Title |
| May | 60.6 | Died | Cyprian Kazimierz von Wolicki † | Auxiliary Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 3 May | 49.9 | Installed | Johann Heinrich von Kerens, S.J. † | Bishop of Wiener Neustadt, Austria | Bishop of Sankt Pölten, Austria |
| 5 May | 73.0 | Died | Antonio Sánchez Sardinero † | Bishop of Huesca, Spain |
| 7 May | 44.3 | Ordained Bishop | Guillaume-Joseph d’Abzac de Mayac † | Bishop of Saint-Papoul, France |
| 39.0 | Ordained Bishop | Domingo Ramón Fernández Angulo † | Bishop of Tui, Spain |
| 48.2 | Ordained Bishop | Tomás Lorenzana Butrón † | Bishop of Gerona, Spain |
| 8 May | 39.6 | Appointed | Francis Moylan † | Bishop of Kerry (o Ardfert) e Aghadoe, Ireland | Bishop of Cork, Ireland |
| 14 May | 56.4 | Ordained Bishop | Friedrich Karl Joseph von Erthal † | Archbishop of Mainz, Germany | Archbishop Emeritus |
| 58.5 | Selected | Johann Andreas Kaiser † | Bishop of Hradec Králové, Czech Republic |
| 24 May | 46.7 | Died | Antonio Lanza, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 25 May | 71.0 | Died | Franz Xaver Anton Marxer † | Auxiliary Bishop of Wien, Austria |
| 22.5 | Ordained Deacon | Ivan Skakoc (Scacoz) † | Deacon | Bishop of Hvar (Lesina), Croatia |
| 26 May | 68.7 | Resigned | Francesco Maria Banditi, C.R. † | Bishop of Corneto (Tarquinia) e Montefiascone, Italy | Cardinal, Archbishop of Benevento, Italy |
| 28 May | 47.8 | Ordained Bishop | Antonius Maria Ambiveri † | Titular Bishop of Aureliopolis in Asia |
| 43.8 | Ordained Priest | Alexandre de Gouvea (Gouveia), T.O.R. † | Priest of Third Order Regular of St. Francis of Penance | Bishop of Peking [Beijing], China |
| 39.4 | Ordained Bishop | László Kollonitz † | Bishop of Transilvania, Erdély, Siebenbürgen, Romania | Archbishop of Kalocsa, Hungary |
| 41.6 | Ordained Bishop | Adam Stanisław Naruszewicz, S.J. † | Titular Bishop of Emmaüs | Bishop of Lutsk (Łuck), Ukraine |
| 40.4 | Ordained Bishop | János Szily † | Titular Bishop of Tinum | Bishop of Szombathely, Hungary |
| 29 May | 65.9 | Elevated to Cardinal | Giovanni Carlo Bandi † | In Pectore | Cardinal, Bishop |
| 68.7 | Appointed | Francesco Maria Banditi, C.R. † | Cardinal, Archbishop of Benevento, Italy |
| 52.0 | Appointed | Antonio Caballero y Góngora † | Bishop of Chiapas (Ciudad Real de Chiapas), México | Bishop of Córdoba, Spain |
| 30.4 | Appointed | Kasper Kazimierz Cieciszowski † | Coadjutor Bishop of Kyiv and Chernihiv (Kijów and Czernihow), Ukraine | Archbishop of Mohilev, Belarus |
| 30.4 | Appointed | Kasper Kazimierz Cieciszowski † | Titular Bishop of Theveste | Archbishop of Mohilev, Belarus |
| 35.2 | Appointed | François Citadella † | Bishop of Accia and Mariana, France |
| 51.3 | Appointed | Philippe Damien de Hoensbroeck † | Bishop of Roermond, Netherlands |
| 52.7 | Appointed | Gerolamo Landolfi (Dandolfi) † | Bishop of Pozzuoli, Italy |
| 55.4 | Appointed | Tommaso Mancini † | Bishop of Cittŕ della Pieve, Italy |
| 37.2 | Appointed | Joachim-François-Mamert de Conzié † | Archbishop of Tours, France |
| 46.0 | Appointed | Antoni Onufry Okecki † | Coadjutor Bishop of Poznań, Poland | Bishop |
| 55.0 | Appointed | José Gregorio Alonso de Ortigosa † | Bishop of Antequera, Oaxaca, México | Bishop Emeritus |
| 58.7 | Appointed | Benedetto Pucilli † | Bishop of Terracina, Priverno e Sezze, Italy |
| 34.5 | Confirmed | Jean-Auguste de Chastenet de Puységur † | Bishop of Saint-Omer, France | Archbishop Emeritus of Bourges, France |
| 43.4 | Appointed | Hugues-François de Regnault-Bellescize † | Bishop of Saint-Brieuc, France |
| 65.4 | Appointed | Giuseppe Sparano † | Archbishop of Acerenza e Matera, Italy |
| 53.4 | Appointed | Krysztof Hilary Szembek † | Coadjutor Bishop of Płock, Poland | Bishop |
| 75.9 | Installed | Bernardino de Vecchi † | Cardinal, Cardinal-Deacon of San Cesareo in Palatio |
| 48.0 | Selected | Friedrich Ludwig Franz von Wangen zu Geroldseck † | Bishop of Basel, Switzerland |
| 30 May | | Born | József Kopácsy † | Veszprém | Archbishop of Esztergom, Hungary |
| 2 Jun | 70.4 | Died | Antonius Taveira de Neiva Brum † | Archbishop Emeritus of Goa, India |
| 4 Jun | 52.7 | Ordained Bishop | Gerolamo Landolfi (Dandolfi) † | Bishop of Pozzuoli, Italy |
| 65.5 | Ordained Bishop | Giuseppe Sparano † | Archbishop of Acerenza e Matera, Italy |
| 5 Jun | 22.1 | Ordained Deacon | László Kámánházy † | Deacon | Bishop of Vác, Hungary |
| 74.4 | Died | François-Marie Le Maistre de La Garlaye † | Bishop of Clermont, France |
| 55.5 | Ordained Bishop | Tommaso Mancini † | Bishop of Cittŕ della Pieve, Italy |
| 10 Jun | 23.0 | Ordained Priest | Rainieri Alliata † | Priest | Archbishop of Pisa, Italy |
| 23.2 | Ordained Priest | Bartolomeo Cesare † | Priest | Bishop of Potenza e Marsico Nuovo, Italy |
| 24.2 | Ordained Priest | Francesco Ridolfi † | Priest | Titular Bishop of Carystus |
| 11 Jun | 45.5 | Ordained Priest | Jan Józef Dembowski † | Priest | Bishop of Kamyanets-Podilskyi (Kamieniec), Ukraine |
| 18 Jun | | Born | Jan Nepomucen Kossakowski † | Slaven | Bishop of Vilnius, Lithuania |
| 21 Jun | 67.2 | Died | Francesco Pantuliano † | Bishop of Policastro, Italy |
| 23 Jun | 46.1 | Selected | Ignaz Franz Stanislaus von Spaur † | Coadjutor Bishop of Brixen {Bressanone}, Italy | Bishop |
| 24 Jun | 58.7 | Ordained Bishop | Benedetto Pucilli † | Bishop of Terracina, Priverno e Sezze, Italy |
| 73.0 | Died | Antonio Sersale † | Cardinal, Archbishop of Napoli {Naples}, Italy |
| 25 Jun | 43.5 | Ordained Bishop | Hugues-François de Regnault-Bellescize † | Bishop of Saint-Brieuc, France |
| 26 Jun | 49.4 | Resigned | Jean-Auguste Frétat de Sarra † | Bishop of Tréguier, France | Bishop of Nantes, France |
| 78.7 | Retired | St. Alfonso Maria de’ Liguori, C.SS.R. † | Bishop of Sant’Agata de’ Goti, Italy | Bishop Emeritus |
| 29 Jun | 34.6 | Ordained Bishop | Jean-Auguste de Chastenet de Puységur † | Bishop of Saint-Omer, France | Archbishop Emeritus of Bourges, France |
| Jul | 68.9 | Died | Francesco Broccoli † | Bishop of Polignano (Polinianum), Italy |
| 70.7 | Died | Celestino Orlandi, O.S.B. † | Bishop of Molfetta, Italy |
| 2 Jul | 51.4 | Ordained Bishop | Philippe Damien de Hoensbroeck † | Bishop of Roermond, Netherlands |
| 44.1 | Ordained Bishop | Franz Philipp von Inzaghi † | Bishop of Trieste, Italy | Bishop of Gorizia e Gradisca, Italy |
| 5 Jul | | Born | Luigi Reggianini † | Modena | Bishop of Modena (e Nonantola), Italy |
| 14 Jul | 68.9 | Resigned | Dominik Kiełczewski † | Auxiliary Bishop of Chełm, Poland | Auxiliary Bishop Emeritus |
| 17 Jul | 48.1 | Appointed | Jan Alojzy Aleksandrowicz † | Coadjutor Bishop of Chełm, Poland | Bishop |
| 48.1 | Appointed | Jan Alojzy Aleksandrowicz † | Titular Bishop of Dardanus | Bishop of Chełm, Poland |
| 68.9 | Elevated to Cardinal | Francesco Maria Banditi, C.R. † | In Pectore | Cardinal, Archbishop |
| 32.5 | Elevated to Cardinal | Ignazio-Gaetano Boncompagni-Ludovisi † | In Pectore | Cardinal, Secretary Emeritus of the Secretariat of State |
| 49.9 | Appointed | Antonius Maria Colonna, O.S.B. † | Titular Bishop of Philadelphia in Arabia |
| 57.9 | Appointed | Onofrio de Rossi † | Bishop of Sant’Agata de’ Goti, Italy |
| 60.5 | Appointed | Adam Dwerditsch † | Auxiliary Bishop of Wien, Austria |
| 60.5 | Appointed | Adam Dwerditsch † | Titular Bishop of Paphus | Auxiliary Bishop of Wien, Austria |
| 35.4 | Appointed | Vincenzo Ferretti † | Bishop of Rieti, Italy | Bishop of Rimini, Italy |
| 42.6 | Appointed | Tommaso Maria Francone, C.R. † | Bishop of Umbriatico (Umbriaticum), Italy | Archbishop of Manfredonia, Italy |
| 48.9 | Appointed | Gaetano Ginanni (Giannini) † | Auxiliary Bishop of Ravenna, Italy | Bishop of Foligno, Italy |
| 48.9 | Appointed | Gaetano Ginanni (Giannini) † | Titular Bishop of Cydonia (Agia, Canea) | Bishop of Foligno, Italy |
| 58.6 | Confirmed | Johann Andreas Kaiser † | Bishop of Hradec Králové, Czech Republic |
| 55.5 | Appointed | Melchior Jan Kochnowski † | Auxiliary Bishop of Chełm, Poland |
| 55.5 | Appointed | Melchior Jan Kochnowski † | Titular Bishop of Dionysias | Auxiliary Bishop of Chełm, Poland |
| 35.5 | Appointed | Jean-Baptiste-Joseph de Lubersac † | Bishop of Tréguier, France | Bishop Emeritus of Chartres, France |
| 23 Jul | 35.4 | Ordained Bishop | Vincenzo Ferretti † | Bishop of Rieti, Italy | Bishop of Rimini, Italy |
| 25 Jul | 42.6 | Ordained Bishop | Tommaso Maria Francone, C.R. † | Bishop of Umbriatico (Umbriaticum), Italy | Archbishop of Manfredonia, Italy |
| 26 Jul | | Born | Karl Anton Joseph Lüpke † | Bersenbrück | Auxiliary Bishop of Osnabrück, Germany |
| 28 Jul | 72.4 | Died | Honuphrius del Tufo † | Bishop of Guardialfiera (Guardia), Italy |
| 30 Jul | 89.6 | Died | François-André Roussel de Tilly † | Bishop Emeritus of Orange, France |
| Aug | 60.5 | Ordained Bishop | Adam Dwerditsch † | Titular Bishop of Paphus | Auxiliary Bishop of Wien, Austria |
| 3 Aug | | Born | Filippo Domenico Bordini † | Scardona | Bishop of Hvar (Lesina), Croatia |
| 6 Aug | 50.6 | Ordained Bishop | Blas Manuel Sobrino y Minayo † | Bishop of Cartagena, Colombia | Bishop of Trujillo, Peru |
| 8 Aug | 35.6 | Ordained Bishop | Jean-Baptiste-Joseph de Lubersac † | Bishop of Tréguier, France | Bishop Emeritus of Chartres, France |
| 9 Aug | 54.2 | Died | Filippo Amadei † | Bishop of Perugia, Italy |
| 11 Aug | 82.2 | Died | Pedro Miguel Argandońa Pastene Salazar † | Archbishop of La Plata o Charcas, Bolivia |
| 16 Aug | 69.4 | Resigned | José Climent Avinent † | Bishop of Barcelona, Spain | Bishop Emeritus |
| 18 Aug | | Born | Johann Leonard Pfaff † | Hünfeld | Bishop of Fulda, Germany |
| Born | Giovanni Battista Sartori Canova † | Crespano del Grappa | Titular Bishop of Myndus |
| 19 Aug | | Born | Vincenzo Macioti † | Vellectri | Bishop of Ferentino, Italy |
| 20 Aug | 44.0 | Ordained Priest | Ignazio Busca † | Priest | Cardinal, Chamberlain (Camerlengo) of the College of Cardinals |
| 39.3 | Ordained Priest | Carlo Crivelli † | Priest | Cardinal, Official of the Roman Curia - Other |
| 46.4 | Ordained Priest | Jean-Charles-Vincent-Gaspar-Constantin-Antoine Giovio † | Priest | Archbishop of Avignon, France |
| 24.5 | Ordained Priest | Giovanni Battista Pio Vitale † | Priest | Bishop of Mondovi, Italy |
| 21 Aug | 84.6 | Died | Ippolito de Rossi † | Bishop of Senigallia, Italy |
| 24 Aug | 63.5 | Died | Girolamo Bajardi † | Bishop of Borgo San Donnino, Italy |
| 25 Aug | 26.6 | Ordained Priest | Franz Xaver von Salm-Reifferscheidt-Krautheim † | Priest of Wien {Vienna}, Austria | Cardinal, Bishop of Gurk, Austria |
| 28 Aug | | Born | Agustin Fernández de Córdoba † | Chuquisaca, Bolivia | Titular Bishop of Attalea in Pamphylia |
| Born | Annibale Tommasi † | Cortona | Bishop of Sansepolcro (Borgo San Sepolcro), Italy |