| Date | Age | Event | Bishop | Title | Current Title |
| 1 May | 44.1 | Ordained Bishop | Joseph Bruno de Bausset-Roquefort † | Bishop of Béziers, France |
| 48.6 | Ordained Bishop | Joseph-Hubert de Boccard † | Bishop of Lausanne, Switzerland |
| 35.3 | Ordained Bishop | Louis-Marie Deveaux, M.E.P. † | Titular Bishop of Lerus | Coadjutor Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viet Nam |
| 44.6 | Selected | Franz Karl Eusebius von Waldburg-Friedberg und Trauchburg † | Bishop of Chiemsee, Germany |
| 2 May | 52.6 | Appointed | Bernardo Cangiani † | Bishop of Boiano, Italy | Bishop Emeritus |
| 48.0 | Confirmed | Jacques-Bonne Gigault de Bellefonds † | Archbishop of Paris, France |
| 38.0 | Appointed | Innocenzo Gorgoni, O.S.B. † | Bishop of Penne e Atri, Italy | President Emeritus of the Pontifical Ecclesiastical Academy |
| 51.3 | Confirmed | Charles-Guy Le Borgne de Kermorvan † | Bishop of Tréguier, France |
| 53.9 | Appointed | Giacinto Silvestri † | Bishop of Nepi e Sutri, Italy | Bishop of Orvieto, Italy |
| 51.3 | Confirmed | Andrzej Stanisław Załuski † | Bishop of Kraków, Poland |
| 5 May | 78.2 | Died | Edme Mongin † | Bishop of Bazas, France |
| 7 May | 59.2 | Resigned | Francesco Antonio Razzolini, O.F.M. Conv. † | Bishop of Santorini {Thira}, Greece | Bishop Emeritus |
| 8 May | 52.7 | Ordained Bishop | Bernardo Cangiani † | Bishop of Boiano, Italy | Bishop Emeritus |
| 38.0 | Ordained Bishop | Innocenzo Gorgoni, O.S.B. † | Bishop of Penne e Atri, Italy | President Emeritus of the Pontifical Ecclesiastical Academy |
| 53.9 | Ordained Bishop | Giacinto Silvestri † | Bishop of Nepi e Sutri, Italy | Bishop of Orvieto, Italy |
| 10 May | 64.2 | Died | Charles-François des Monstiers de Mérinville † | Bishop of Chartres, France |
| 18 May | 70.6 | Died | Lodovico Maria Pandolfini † | Bishop of Volterra, Italy |
| 19 May | | Born | Francesco Amoroso † | | Archbishop of Lanciano, Italy |
| 22 May | | Born | Dominic Bellew † | | Bishop of Killala, Ireland |
| 46.9 | Ordained Bishop | Georgius Wolfgangus Chiolich † | Bishop of Senj (-Modruš), Croatia |
| 60.0 | Ordained Bishop | Johann Christoph von Crass † | Titular Bishop of Dibon (Dibona) | Auxiliary Bishop of Paderborn, Germany |
| 48.3 | Ordained Bishop | Ferdinand Julius von Troyer † | Cardinal, Bishop of Olomouc (Olmütz), Czechia |
| 25 May | 68.8 | Died | Pier Gerolamo Caravadossi, O.P. † | Bishop of Casale Monferrato, Italy |
| 26 May | | Born | José António Pinto de Mendonça Arrais † | | Bishop of Guarda, Portugal |
| 1 Jun | | Born | Louis-François-Alexandre de Jarente de Senas d’Orgeval † | | Bishop Emeritus of Orléans, France |
| 4 Jun | 23.2 | Ordained Priest | Johann Georg Joseph von Eckart † | Priest of Mainz, Germany | Auxiliary Bishop |
| 32.2 | Ordained Priest | Pietro Paolo Leonardi † | Priest | Bishop of Ascoli Piceno, Italy |
| 5 Jun | | Born | Girolamo Luigi Crivelli † | | Bishop of Nepi e Sutri, Italy |
| 6 Jun | | Born | Hilarion-François de Chevigné de Boischollet † | | Bishop of Sées {Séez}, France |
| 7 Jun | | Born | Antonio Carrillo Mayoral † | | Bishop of Plasencia, Spain |
| 9 Jun | | Born | Salvatore Spinelli, O.S.B. † | | Archbishop of Salerno, Italy |
| 10 Jun | 39.6 | Resigned | Jean-Joseph Chapelle de Saint-Jean de Jumilhac † | Bishop of Vannes, France | Archbishop of Arles, France |
| 11 Jun | | Born | Elléon de Castellane-Mazangues † | | Bishop of Toulon, France |
| 12 Jun | 24.6 | Ordained Deacon | Antônio Corrêa, O.E.S.A. † | Deacon of Order of Hermits of St. Augustine | Archbishop of São Salvador da Bahia, Brazil |
| 47.8 | Ordained Bishop | Jean Antoine de Robiano † | Bishop of Roermond, Netherlands |
| 13 Jun | 47.8 | Installed | Jean Antoine de Robiano † | Bishop of Roermond, Netherlands |
| 14 Jun | 66.4 | Confirmed | Salvador Bermúdez y Becerra † | Archbishop of La Plata o Charcas, Bolivia |
| 47.8 | Appointed | Gaspare Lancillotti-Birago † | Bishop of Bobbio, Italy |
| 52.5 | Appointed | Giovanni Calebotta † | Bishop of Arbe (Rab), Croatia | Bishop of Šibenik (Knin), Croatia |
| 56.3 | Appointed | Agostino Maria (Cesar Philippe) Neuroni, O.F.M. Cap. † | Bishop of Como, Italy |
| 47.1 | Confirmed | José de Peralta Barrionuevo y Rocha Benavídez, O.P. † | Bishop of La Paz, Bolivia |
| 71.6 | Confirmed | Agustín Rodríguez Delgado † | Archbishop of Lima, Peru |
| 35.8 | Appointed | Giuseppe de Vignoli † | Bishop of San Severino (Marche), Italy | Bishop of Forli, Italy |
| 15 Jun | 60.0 | Installed | José Francisco Martínez de Tejada y Díez de Velasco, O.F.M. † | Bishop of Yucatán (Mérida), México | Bishop of Guadalajara, Jalisco, México |
| 17 Jun | | Born | Filippo Speranza † | | Bishop of Capaccio, Italy |
| 19 Jun | 47.8 | Ordained Bishop | Gaspare Lancillotti-Birago † | Bishop of Bobbio, Italy |
| 24.6 | Ordained Priest | Antônio Corrêa, O.E.S.A. † | Priest of Order of Hermits of St. Augustine | Archbishop of São Salvador da Bahia, Brazil |
| 36.9 | Selected | Jean-Baptiste-Amédée de Grégoire de Saint-Sauveur † | Bishop of Bazas, France |
| 56.3 | Ordained Bishop | Agostino Maria (Cesar Philippe) Neuroni, O.F.M. Cap. † | Bishop of Como, Italy |
| 29.1 | Selected | Pierre-Augustin-Bernardin de Rosset de Rocozel de Fleury † | Bishop of Chartres, France |
| 35.8 | Ordained Bishop | Giuseppe de Vignoli † | Bishop of San Severino (Marche), Italy | Bishop of Forli, Italy |
| 24 Jun | 41.6 | Ordained Deacon | Franz Heinrich Wendelin von Kagenegg † | Deacon of Eichstätt, Germany | Auxiliary Bishop Emeritus |
| 26 Jun | 52.5 | Ordained Bishop | Giovanni Calebotta † | Bishop of Arbe (Rab), Croatia | Bishop of Šibenik (Knin), Croatia |
| 41.6 | Ordained Priest | Franz Heinrich Wendelin von Kagenegg † | Priest of Eichstätt, Germany | Auxiliary Bishop Emeritus |
| 22.3 | Ordained Deacon | Ignatius Krzyżanowski † | Deacon | Auxiliary Bishop of Przemyśl, Poland |
| Born | Jean-Siffrein Maury † | | Cardinal, Bishop Emeritus of Corneto (Tarquinia) e Montefiascone, Italy |
| 29 Jun | 40.2 | Ordained Bishop | Miguel de Bulhões e Souza, O.P. † | Bishop of Malacca, Singapore | Bishop of Leiria, Portugal |
| 30.7 | Ordained Bishop | João Cosme da Cunha (de Nossa Senhora da Porta), C.R.S.A. † | Bishop of Leiria, Portugal | Cardinal, Archbishop of Évora, Portugal |
| Jul | | Born | Richard O’Reilly † | | Archbishop of Armagh, Ireland |
| 3 Jul | | Born | Jean-Louis-Simon Rollet † | | Bishop Emeritus of Montpellier, France |
| 10 Jul | 24.0 | Ordained Priest | Pier Luigi Galletti, O.S.B. † | Priest of Order of Saint Benedict | Titular Bishop of Cyrene |
| 51.4 | Ordained Bishop | Charles-Guy Le Borgne de Kermorvan † | Bishop of Tréguier, France |
| 15 Jul | 81.5 | Died | Ludovico Anselmo Gualtieri † | Bishop of Todi, Italy |
| 69.4 | Died | Giambattista Labanchi † | Bishop of Oria, Italy |
| 20 Jul | 48.2 | Died | Jacques-Bonne Gigault de Bellefonds † | Archbishop of Paris, France |
| Born | Jean Labartette, M.E.P. † | | Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| Born | Giovanni Battista Marchese † | | Bishop of Catanzaro, Italy |
| 22 Jul | | Born | Blas Jacobo Beltrán † | | Bishop of Coria, Spain |
| 24 Jul | 78.8 | Died | Girolamo Crispi † | Archbishop of Ferrara, Italy |
| 25 Jul | 72.3 | Died | Friedrich Karl von Schönborn † | Bishop of Würzburg, Germany |
| 29 Jul | 91.7 | Died | José de Sousa Castelo Branco † | Bishop Emeritus of Funchal, Portugal |
| 5 Aug | 43.0 | Selected | Christophe de Beaumont du Repaire † | Archbishop of Paris, France |
| 6 Aug | 80.9 | Appointed | Giuseppe Antonio Davanzati † | Titular Patriarch of Alexandria {Alessandria} | Archbishop of Trani, Italy |
| 7 Aug | 50.5 | Selected | Bernardo de Arbizu y Ugarte † | Bishop of Cartagena, Colombia | Bishop of Trujillo, Peru |
| 9 Aug | | Born | Lorenzo Igual de Soria † | | Bishop of Plasencia, Spain |
| 13 Aug | 44.9 | Confirmed | Franz Karl Eusebius von Waldburg-Friedberg und Trauchburg † | Bishop of Chiemsee, Germany |
| 14 Aug | 57.2 | Ordained Bishop | Joannes Antonius Stratman, O.C.D. † | Titular Bishop of Aureliopolis in Asia | Vicar Apostolic of Great Mogul (Mughals), India |
| 44.9 | Ordained Bishop | Franz Karl Eusebius von Waldburg-Friedberg und Trauchburg † | Bishop of Chiemsee, Germany |
| 15 Aug | 19.8 | Professed | Giuseppe Antonio Albertini, O.C.D. † | Member of Order of Discalced Carmelites | Vicar Apostolic Emeritus of Malabar, India |
| 17 Aug | 43.6 | Selected | Juan Nieto Polo del Aguila † | Bishop of Quito, Ecuador |
| 18 Aug | | Born | Charles-Antoine-Henri Du Valk de Dampierre † | | Bishop of Clermont, France |
| 22 Aug | 34.6 | Confirmed | Charles-Jean de Bertin † | Bishop of Vannes, France |
| 51.8 | Appointed | Marcello Crescenzi † | Cardinal, Archbishop of Ferrara, Italy |
| 30.0 | Appointed | Alexander Fé † | Titular Bishop of Methone |
| 56.3 | Appointed | Diego Martínez y Garrido, O.S. † | Titular Bishop of Tricca | Bishop Emeritus of Cartagena, Colombia |
| 56.3 | Resigned | Diego Martínez y Garrido, O.S. † | Bishop of Cartagena, Colombia | Bishop Emeritus |
| 27 Aug | 67.5 | Died | Carlo Leopoldo Calcagnini † | Cardinal, Cardinal-Deacon of Santa Maria in Ara Coeli |
| 28 Aug | 53.2 | Ordained Bishop | Pedro Miguel Argandoña Pastene Salazar † | Bishop of Córdoba (Tucumán), Argentina | Archbishop of La Plata o Charcas, Bolivia |
| 29 Aug | 62.7 | Selected | Anselm Franz von Ingelheim † | Bishop of Würzburg, Germany |