| Date | Age | Event | Bishop | Title | Current Title |
| May | 41.3 | Ordained Bishop | Ignace Michel Zahir (Daher) † | Patriarch of Antiochia {Antioch} (Syrian), Lebanon | Patriarch Emeritus |
| 1 May | 39.1 | Ordained Bishop | Jean-Baptiste-Marie Caffarelli † | Bishop of Saint-Brieuc, France |
| 62.2 | Confirmed | Jean-Baptiste de Chabot † | Bishop of Mende, France | Bishop Emeritus |
| Born | Carlo Gigli † | Anagni | Bishop Emeritus of Tivoli, Italy |
| 70.9 | Ordained Bishop | Giuseppe Guzzetta † | Titular Bishop of Lampsacus |
| 2 May | 54.2 | Installed | Antonio Bergosa y Jordán † | Bishop of Antequera, Oaxaca, México | Archbishop of Tarragona, Spain |
| 55.7 | Ordained Bishop | Charles-Antoine-Henri Du Valk de Dampierre † | Bishop of Clermont, France |
| Born | Vincent Jekelfalussy † | Mucsony, Hungary | Bishop of Székesfehérvár (Albareale), Hungary |
| 64.5 | Confirmed | Henri Reymond † | Bishop of Dijon, France |
| 4 May | 64.5 | Confirmed | Pierre-François Bienaymé † | Bishop of Metz, France |
| 49.8 | Confirmed | Charles Brault † | Bishop of Bayeux, France | Archbishop of Albi, France |
| 59.8 | Confirmed | René des Monstiers de Mérinville † | Bishop of Chambéry, France | Bishop Emeritus |
| 6 May | 33.7 | Confirmed | Hugues-Robert-Jean-Charles de la Tour d'Auvergne-Lauraquais † | Cardinal, Bishop of Arras, France |
| 9 May | 58.9 | Ordained Bishop | Claude André † | Bishop of Quimper, France | Bishop Emeritus |
| 64.5 | Ordained Bishop | Pierre-François Bienaymé † | Bishop of Metz, France |
| 64.0 | Confirmed | Louis Charrier de La Roche † | Bishop of Versailles, France |
| 11 May | | Born | Giuseppe Andrea Bizzarri † | Paliano | Cardinal, Prefect of the Roman Curia - Other |
| 55.9 | Confirmed | Hilarion-François de Chevigné de Boischollet † | Bishop of Sées, France |
| 44.2 | Appointed | Giuseppe Morozzo Della Rocca † | Apostolic Nuncio to Other | Cardinal, Bishop of Novara, Italy |
| 12 May | | Born | Nicolas-Marie Sergent † | Corbigny | Bishop of Quimper [Cornouailles](-Léon), France |
| 13 May | 47.8 | Succeeded | Józef Arnulf Giedroyc † | Bishop of Samogizia o Tels (Zmudz), Lithuania |
| 72.3 | Died | Jan Stefan Giedroyc † | Bishop of Samogizia o Tels (Zmudz), Lithuania |
| 15 May | 52.1 | Confirmed | Etienne-André-François de Paule de Fallot de Béaupré de Beaumont † | Bishop of Gent {Ghent, Gand}, Belgium | Bishop Emeritus of Foreign Diocese |
| 63.3 | Confirmed | Jean-Chrysostome de Villaret † | Bishop of Amiens, France | Bishop Emeritus of Foreign Diocese |
| 16 May | 49.8 | Ordained Bishop | Charles Brault † | Bishop of Bayeux, France | Archbishop of Albi, France |
| 55.9 | Ordained Bishop | Hilarion-François de Chevigné de Boischollet † | Bishop of Sées, France |
| Born | Juan Nepomuceno Garcia Gómez † | Pradillo | Bishop of Coria, Spain |
| 33.8 | Ordained Bishop | Hugues-Robert-Jean-Charles de la Tour d'Auvergne-Lauraquais † | Cardinal, Bishop of Arras, France |
| 80.6 | Confirmed | Gabriel-François Moreau † | Bishop of Autun, France |
| 20 May | | Born | François-Alexis Rameaux, C.M. † | Desnes, France | Vicar Apostolic of Chekiang {Ce-Kiam}, China |
| 23 May | 58.6 | Ordained Bishop | Manuel Cid Monroy † | Archbishop of Burgos, Spain |
| 58.7 | Ordained Bishop | Manuel Gómez Salazar † | Bishop of Avila, Spain |
| 53.5 | Died | Gregory Stapleton † | Vicar Apostolic of Midland District, England, Great Britain |
| 63.3 | Ordained Bishop | Jean-Chrysostome de Villaret † | Bishop of Amiens, France | Bishop Emeritus of Foreign Diocese |
| 24 May | 48.1 | Appointed | Francesco Bertazzoli † | Titular Archbishop of Edessa in Macedonia | Cardinal, Prefect of the Congregation for Studies |
| 74.0 | Appointed | Gaetano Maria Bonanno † | Bishop of Siracusa, Italy |
| 53.8 | Appointed | Luiz de Brito Homem † | Bishop of São Luís do Maranhão, Brazil |
| 69.0 | Appointed | Giovanni Battista Caprara Montecuccoli † | Cardinal, Archbishop of Milano {Milan}, Italy |
| 43.7 | Confirmed | Jean-Baptiste Colonna d'Istria † | Bishop of Nice, France | Bishop Emeritus |
| 52.5 | Appointed | Francisco Javier de Lizana y Beaumont † | Archbishop of México, Federal District |
| 68.8 | Appointed | Ludovico Flangini Giovanelli † | Cardinal-Priest of S. Anastasia | Cardinal, Patriarch of Venezia {Venice}, Italy |
| 54.3 | Appointed | Francisco Javier Mier Campillo † | Bishop of Almería, Spain | Bishop Emeritus |
| 75.4 | Died | Jean-Marc de Royére † | Bishop Emeritus of Castres, France |
| 57.1 | Appointed | Sylvestre a Maria Santissima (Santa Maria), O.F.M. † | Bishop of Santiago de Cabo Verde |
| 46.2 | Appointed | Giuseppe Spina † | Archbishop of Genova, Italy | Cardinal, Archbishop Emeritus |
| 59.6 | Appointed | Ercole Teresi † | Archbishop of Monreale, Italy |
| 73.5 | Appointed | Cayetano Velozo, O.F.M. † | Bishop of São Tomé e Príncipe |
| 25 May | 65.9 | Appointed | Claude de Bexon † | Bishop of Namur {Namen}, Belgium | Bishop Emeritus |
| 67.5 | Confirmed | Johann Michael Josef von Pidoll de Quitenbach † | Bishop of Le Mans, France |
| 27 May | 64.0 | Installed | Louis Charrier de La Roche † | Bishop of Versailles, France |
| 30 May | 61.7 | Appointed | Marc-Antione Berdolet † | Bishop of Aachen, Germany |
| 48.1 | Ordained Bishop | Francesco Bertazzoli † | Titular Archbishop of Edessa in Macedonia | Cardinal, Prefect of the Congregation for Studies |
| 66.0 | Ordained Bishop | Claude de Bexon † | Bishop of Namur {Namen}, Belgium | Bishop Emeritus |
| 71.7 | Ordained Bishop | Juan Antonio Pérez Hernández de Larrea † | Bishop of Valladolid, Spain |
| 1 Jun | 50.8 | Confirmed | Marie-Jean-Philippe Dubourg † | Bishop of Limoges, France |
| 2 Jun | 65.8 | Confirmed | Charles-François d'Aviau Du Bois de Sanzay † | Archbishop of Bordeaux, France |
| 3 Jun | 69.4 | Died | Joseph Adam Graf Arco † | Bishop of Seckau, Austria |
| 66.5 | Confirmed | Jean-Evangéliste Zaepfell † | Bishop of Liège, Belgium |
| 7 Jun | 50.8 | Ordained Bishop | Marie-Jean-Philippe Dubourg † | Bishop of Limoges, France |
| 66.5 | Ordained Bishop | Jean-Evangéliste Zaepfell † | Bishop of Liège, Belgium |
| 13 Jun | 59.7 | Ordained Bishop | Ercole Teresi † | Archbishop of Monreale, Italy |
| 16 Jun | 57.3 | Confirmed | Louis Sébastiani (de La Porta) † | Bishop of Ajaccio, France |
| 20 Jun | 74.1 | Ordained Bishop | Gaetano Maria Bonanno † | Bishop of Siracusa, Italy |
| 52.9 | Installed | Dominique Lacombe † | Bishop of Angoulême, France |
| 23.0 | Ordained Priest | Joseph Karl von Schuberth † | Priest of Wrocław, Poland | Auxiliary Bishop |
| 24 Jun | 57.3 | Ordained Bishop | Louis Sébastiani (de La Porta) † | Bishop of Ajaccio, France |
| 30 Jun | 52.6 | Installed | Václav (Wenzel) Léopold Ritter von Chlumčansky † | Bishop of Litomĕrice, Czech Republic | Archbishop of Praha {Prague}, Czech Republic |
| 1 Jul | 79.7 | Died | Carlo Livizzani Forni † | Cardinal, Cardinal-Priest of S. Silvestro in Capite |
| 2 Jul | 57.3 | Appointed | Guillaume-Balthasar Cousin de Grainville † | Bishop of Cahors, France |
| Born | Pierre-Antoine-Marie Lamouroux de Pompignac † | Saint-Flour | Bishop of Saint-Flour, France |
| 4 Jul | 83.5 | Resigned | Friedrich Karl Joseph Reichsfreiherr von Erthal † | Archbishop of Mainz, Germany | Archbishop Emeritus |
| 83.5 | Resigned | Friedrich Karl Joseph Reichsfreiherr von Erthal † | Bishop of Worms, Germany | Archbishop Emeritus of Mainz, Germany |
| 5 Jul | 70.3 | Appointed | François Bécherel † | Bishop of Valence, France |
| 45.8 | Confirmed | Etienne-Hubert de Cambacérès † | Cardinal, Archbishop of Rouen, France |
| 57.7 | Appointed | Jean-Baptiste Duvoisin † | Bishop of Nantes, France |
| 41.2 | Appointed | Jean Jacoupy † | Bishop of Agen, France | Bishop Emeritus |
| 45.5 | Appointed | Arnaud-Ferdinand de La Porte † | Bishop of Carcassonne, France |
| 58.4 | Appointed | Joseph-Jacques Loison † | Bishop of Bayonne, France |
| 56.7 | Appointed | Charles Mannay † | Bishop of Trier, Germany | Bishop of Rennes, France |
| 46.3 | Appointed | Jean-Eléonor Montanier de Belmont † | Bishop of Saint-Flour, France |
| 57.6 | Appointed | Claude Simon † | Bishop of Grenoble, France |
| 58.1 | Confirmed | Irénée-Yves Desolle (Dessole) † | Bishop of Digne, France | Archbishop Emeritus of Chambéry, France |
| 6 Jul | 26.0 | Ordained Priest | Jakob Brand † | Priest of Mainz, Germany | Bishop of Limburg, Germany |
| 10 Jul | 51.4 | Appointed | François Joseph Hirn † | Bishop of Tournai {Doornik}, Belgium |
| 46.3 | Confirmed | Jean-Eléonor Montanier de Belmont † | Bishop of Saint-Flour, France |
| 11 Jul | 43.9 | Ordained Bishop | Jean-Baptiste Colonna d'Istria † | Bishop of Nice, France | Bishop Emeritus |
| 47.4 | Ordained Bishop | Santiago Hernández Milanés † | Bishop of Mérida, Venezuela |
| 58.1 | Ordained Bishop | Irénée-Yves Desolle (Dessole) † | Bishop of Digne, France | Archbishop Emeritus of Chambéry, France |
| 63.5 | Installed | Jean-Chrysostome de Villaret † | Bishop of Amiens, France | Bishop Emeritus of Foreign Diocese |
| 12 Jul | 80.8 | Died | Antônio Corrêa, O.S.A. † | Archbishop of São Salvador da Bahia, Brazil |
| 14 Jul | 66.9 | Installed | Jérôme-Marie Champion de Cicé † | Archbishop of Aix, France |
| 15 Jul | 70.4 | Confirmed | François Bécherel † | Bishop of Valence, France |
| 41.2 | Confirmed | Jean Jacoupy † | Bishop of Agen, France | Bishop Emeritus |
| 17 Jul | 56.8 | Confirmed | Charles Mannay † | Bishop of Trier, Germany | Bishop of Rennes, France |
| 18 Jul | 51.4 | Ordained Bishop | François Joseph Hirn † | Bishop of Tournai {Doornik}, Belgium |
| 41.2 | Ordained Bishop | Jean Jacoupy † | Bishop of Agen, France | Bishop Emeritus |
| 23.3 | Ordained Priest | Patrick Kelly † | Priest | Bishop of Waterford and Lismore, Ireland |
| 56.8 | Ordained Bishop | Charles Mannay † | Bishop of Trier, Germany | Bishop of Rennes, France |
| 46.4 | Ordained Bishop | Jean-Eléonor Montanier de Belmont † | Bishop of Saint-Flour, France |
| 21 Jul | 57.3 | Confirmed | Guillaume-Balthasar Cousin de Grainville † | Bishop of Cahors, France |
| 45.9 | Appointed | Johann Friedrich Graf von Waldenstein-Wartenberg † | Bishop of Seckau, Austria |
| 23 Jul | 70.4 | Installed | François Bécherel † | Bishop of Valence, France |
| 25 Jul | 61.9 | Ordained Bishop | Marc-Antione Berdolet † | Bishop of Aachen, Germany |
| 58.5 | Succeeded | Karl Theodor Freiherr von Dalberg † | Bishop of Worms, Germany |
| 57.8 | Confirmed | Jean-Baptiste Duvoisin † | Bishop of Nantes, France |
| 83.6 | Died | Friedrich Karl Joseph Reichsfreiherr von Erthal † | Archbishop Emeritus of Mainz, Germany |
| Born | John Pius Leahy, O.P. † | Cork | Bishop of Dromore, Ireland |
| 36.3 | Ordained Bishop | Pierre Trenchant, M.E.P. † | Titular Bishop of Charadrus | Coadjutor Vicar Apostolic of Se-Ciuen, China |
| 29 Jul | 39.6 | Appointed | Joseph Fesch † | Archbishop of Lyon, France | Cardinal, Archbishop of Lyon (-Vienne), France |
| 1 Aug | 42.1 | Appointed | Joseph Ludwig Colmar † | Bishop of Mainz, Germany |
| 57.3 | Ordained Bishop | Guillaume-Balthasar Cousin de Grainville † | Bishop of Cahors, France |
| 57.8 | Ordained Bishop | Jean-Baptiste Duvoisin † | Bishop of Nantes, France |
| 2 Aug | 73.5 | Died | Salvador Bienpica y Sotomayor † | Bishop of Tlaxcala, Tlaxcala, México |
| 25.8 | Ordained Priest | Bernard Georg Kellermann † | Priest of Münster, Germany | Bishop-Elect |
| 57.7 | Confirmed | Claude Simon † | Bishop of Grenoble, France |
| Born | Nicholas Patrick Stephen (Nicolás Patricio Esteban) Wiseman † | Seville, Spain | Cardinal, Archbishop of Westminster, England, Great Britain |
| 4 Aug | 39.6 | Confirmed | Joseph Fesch † | Archbishop of Lyon, France | Cardinal, Archbishop of Lyon (-Vienne), France |
| 7 Aug | 42.1 | Confirmed | Joseph Ludwig Colmar † | Bishop of Mainz, Germany |
| 8 Aug | 57.7 | Ordained Bishop | Claude Simon † | Bishop of Grenoble, France |
| 9 Aug | 43.5 | Appointed | Alfonso Aguado Jaraba † | Auxiliary Bishop of Toledo, Spain |
| 43.5 | Appointed | Alfonso Aguado Jaraba † | Titular Bishop of Augustopolis in Phrygia | Auxiliary Bishop of Toledo, Spain |
| 61.8 | Appointed | Carlo Francesco Maria Caselli, O.S.M. † | Cardinal-Priest of S. Marcello | Cardinal, Bishop of Parma, Italy |
| 61.8 | Elevated to Cardinal | Carlo Francesco Maria Caselli, O.S.M. † | Cardinal, Bishop of Parma, Italy |
| 48.5 | Appointed | Mateo Delgado Moreno † | Archbishop (Personal Title) of Badajoz, Spain | Bishop |
| 55.6 | Appointed | Michele Di Pietro † | Cardinal-Priest of S. Maria in Via | Cardinal, Official of the Roman Curia - Other |
| 55.6 | Elevated to Cardinal | Michele Di Pietro † | Cardinal, Official of the Roman Curia - Other |
| 56.7 | Appointed | Franz Karl Joseph Fürst von Hohenlohe-Waldenburg-Schillingsfürst † | Auxiliary Bishop of Augsburg, Germany | Bishop |
| 56.7 | Appointed | Franz Karl Joseph Fürst von Hohenlohe-Waldenburg-Schillingsfürst † | Titular Bishop of Tempe | Bishop of Augsburg, Germany |
| 62.8 | Appointed | Alphonse-Hubert de Latier de Bayane † | Cardinal-Deacon of S. Angelo in Pescheria | Cardinal, Priest of the Roman Curia - Other |
| 62.8 | Elevated to Cardinal | Alphonse-Hubert de Latier de Bayane † | Cardinal, Priest of the Roman Curia - Other |
| 59.7 | Confirmed | Francisco Leitão de Carvalho † | Bishop of Beja, Portugal |
| 49.4 | Appointed | Benito Lué y Riega † | Bishop of Buenos Aires, Argentina |
| 71.7 | Elevated to Cardinal | Domenico Pignatelli di Belmonte, C.R. † | Cardinal, Archbishop of Palermo, Italy |
| 41.0 | Appointed | Dionisio Ridolfini Conestabile † | Titular Archbishop of Corinthus | Bishop of Viterbo e Tuscania, Italy |
| 52.0 | Appointed | Luigi Ruffo Scilla † | Cardinal, Archbishop of Napoli {Naples}, Italy |
| 61.9 | Appointed | Bernardo Serio † | Auxiliary Bishop of Palermo, Italy |
| 61.9 | Appointed | Bernardo Serio † | Titular Bishop of Hermopolis Maior | Auxiliary Bishop of Palermo, Italy |
| 73.1 | Appointed | Domenico Spoto † | Bishop of Lipari, Italy | Bishop of Cefalù, Italy |
| 60.7 | Appointed | Nicolás Videla del Pino † | Bishop of Paraguay | Bishop of Salta, Argentina |
| 10 Aug | 62.5 | Died | J. Damián Martínez de Galinsonga, O.F.M. † | Bishop of Tarazona, Spain |
| 11 Aug | | Born | Bartholomaeus Widmer † | Carnioburg | Bishop Emeritus of Ljubljana, Slovenia |
| 12 Aug | 84.1 | Died | Hyacinthe-Sigismond Gerdil, B. † | Cardinal, Cardinal-Priest of S. Cecilia |
| Born | Bernard-Vincent Laribe, C.M. † | Sousceyrac, France | Vicar Apostolic of Kiam-Si {Kiangsi}, China |
| 14 Aug | | Born | Fabio Maria Asquini † | Fagagna | Cardinal, Secretary of the Roman Curia - Other |
| 15 Aug | 39.6 | Ordained Bishop | Joseph Fesch † | Archbishop of Lyon, France | Cardinal, Archbishop of Lyon (-Vienne), France |
| 41.0 | Ordained Bishop | Dionisio Ridolfini Conestabile † | Titular Archbishop of Corinthus | Bishop of Viterbo e Tuscania, Italy |
| 46.0 | Ordained Bishop | Johann Friedrich Graf von Waldenstein-Wartenberg † | Bishop of Seckau, Austria |
| 16 Aug | 70.7 | Appointed | Stefano Borgia † | Cardinal, Prefect of the Congregation for Propagation of the Faith |
| 18 Aug | 58.3 | Appointed | Michelangelo Luchi, O.S.B. † | Prefect of the Roman Curia - Other | Cardinal, Priest |
| 24 Aug | 42.2 | Ordained Bishop | Joseph Ludwig Colmar † | Bishop of Mainz, Germany |
| Ordained Bishop | Peter McLaughlin † | Bishop of Raphoe, Ireland | Bishop of Derry, Ireland |
| 28 Aug | | Born | Angelo Quaglia † | Corneto | Cardinal, Priest of the Roman Curia - Other |