| Date | Age | Event | Bishop | Title | Current Title |
| May | 56.2 | Resigned | [Jean-Joseph Mestadier] † | Bishop of [Deux-Sèvres (Constitutional), France] | Bishop Emeritus |
| 8 May | 77.8 | Died | José Laplana y Castellón † | Bishop of Tarazona, Spain |
| 57.1 | Died | Joachim-François-Mamert de Conzié † | Archbishop of Tours, France |
| 9 May | 70.3 | Ordained Deacon | Christoph Franz von Buseck † | Deacon | Bishop of Bamberg, Germany |
| 10 May | 22.9 | Ordained Priest | John Murphy † | Priest | Bishop of Cork, Ireland |
| 12 May | 54.1 | Selected | Lourenço Correa de Sá e Benevides † | Bishop of Porto, Portugal |
| 54.0 | Selected | Saverio Granata, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| Born | Giovanni Niccolò Tanari (Tanara) † | | Titular Patriarch of Antiochia {Antioch} |
| 13 May | 70.3 | Ordained Priest | Christoph Franz von Buseck † | Priest | Bishop of Bamberg, Germany |
| 14 May | | Born | Zsigmond Deáky † | | Auxiliary Bishop of Győr (Raab), Hungary |
| 15 May | 63.2 | Appointed | Wenzel Kobaltz † | Prefect of Lausitz (Lusatia), Germany |
| 17 May | 85.3 | Died | Michael Fadel † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 19 May | | Born | Mellon Jolly † | | Archbishop Emeritus of Sens (-Auxerre), France |
| 46.4 | Appointed | Athanasius Saraff † | Titular Archbishop of Theodosiopolis in Armenia | Titular Bishop |
| 20 May | | Born | Francis Murphy † | | Bishop of Adelaide, Australia |
| Born | Józef Maksymilian Staniewski, O.P. † | | Auxiliary Bishop Emeritus of Mohilev, Belarus |
| 24 May | 22.9 | Ordained Deacon | Jan Kajetan Cywiński † | Deacon | Auxiliary Bishop of Vilnius, Lithuania |
| 26 May | 22.1 | Ordained Deacon | Kyran Marum † | Deacon of Ossory, Ireland | Bishop |
| 27 May | 69.6 | Died | Pedro Rubio-Benedicto Herrero † | Bishop of Jaén, Spain |
| 28 May | 48.1 | Resigned | Francisco de Cuerda † | Bishop of Puerto Rico (Porto Rico) | Bishop Emeritus |
| 75.8 | Retired | Francisco Fabián y Fuero † | Archbishop of Valencia, Spain | Archbishop Emeritus |
| 30 May | 32.2 | Ordained Priest | Antonio Maria Odescalchi † | Priest | Bishop of Jesi, Italy |
| 24.0 | Ordained Priest | Faustino Zucchini † | Priest | Titular Archbishop of Laodicea in Phrygia |
| 31 May | 22.4 | Ordained Deacon | Bonifaz Kaspar von Urban † | Deacon of Order of Hermits of St. Augustine | Archbishop of Bamberg, Germany |
| Jun | 64.8 | Confirmed | Joseph Antoine Cocatrix, C.R.A. † | Abbot of Saint-Maurice, Switzerland |
| 1 Jun | 63.7 | Appointed | Giovanni Andrea Archetti † | Archbishop (Personal Title) of Ascoli Piceno, Italy | Cardinal, Cardinal-Bishop of Sabina |
| 58.8 | Appointed | Giovanni Archinto † | Cardinal, Cardinal-Bishop of Sabina |
| 51.5 | Appointed | Michele Argelati, O.S.M. † | Auxiliary Bishop of Ostia (-Velletri), Italy | Bishop of Terracina, Priverno e Sezze, Italy |
| 51.5 | Appointed | Michele Argelati, O.S.M. † | Titular Bishop of Hippos | Bishop of Terracina, Priverno e Sezze, Italy |
| 49.5 | Appointed | Teodoro Loredano Balbi † | Bishop of Novigrad (Cittanova), Croatia |
| 42.5 | Appointed | Giovanni Martino Bernardoni Baccolo † | Titular Bishop of Famagusta | Bishop Emeritus of Kotor (Cattaro), Montenegro |
| 70.4 | Confirmed | Christoph Franz von Buseck † | Bishop of Bamberg, Germany |
| 66.4 | Appointed | Francisco Javier Cabrera Velasco † | Bishop of Orihuela, Spain | Bishop of Ávila, Spain |
| 45.5 | Appointed | Václav (Wenzel) Léopold von Chlumčansky † | Auxiliary Bishop of Praha {Prague}, Czechia | Archbishop |
| 45.5 | Appointed | Václav (Wenzel) Léopold von Chlumčansky † | Titular Bishop of Cydonia (Agia, Canea) | Archbishop of Praha {Prague}, Czechia |
| 52.8 | Confirmed | Mateus de Abreu Pereira † | Bishop of São Paulo, Brazil |
| 50.8 | Elevated to Cardinal | Giulio Maria della Somaglia † | Cardinal, Librarian of the Vatican Library |
| 50.1 | Confirmed | Antonio Despuig y Dameto † | Archbishop of Valencia, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |
| 24.8 | Appointed | Kaspar Max Droste zu Vischering † | Auxiliary Bishop of Münster, Germany | Bishop |
| 24.8 | Appointed | Kaspar Max Droste zu Vischering † | Titular Bishop of Ierichus | Bishop of Münster, Germany |
| 62.2 | Appointed | José Alejandro de Egües y Villamar † | Bishop of Santa Marta, Colombia |
| 46.2 | Confirmed | Georg Karl Ignaz von Fechenbach zu Laudenbach † | Bishop of Würzburg, Germany |
| 44.8 | Confirmed | Joaquim Ferreira de Carvalho † | Bishop of São Luís do Maranhão, Brazil |
| 58.3 | Appointed | Nicola Francesco Franchi † | Titular Bishop of Tremithus | Bishop of Penne e Atri, Italy |
| 54.8 | Appointed | Giovanni Pietro Galzigna † | Bishop of Arbe (Rab), Croatia |
| 51.1 | Appointed | Bonaventura (Domenico Giuseppe) Gazzola, O.F.M. Ref. † | Bishop of Cervia, Italy | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 54.0 | Confirmed | Saverio Granata, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 30.5 | Appointed | Karl Klemens von Gruben † | Auxiliary Bishop of Osnabrück, Germany |
| 30.5 | Appointed | Karl Klemens von Gruben † | Titular Bishop of Paros | Auxiliary Bishop of Osnabrück, Germany |
| 38.4 | Appointed | Adam Korwin Kossakowski † | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 38.4 | Appointed | Adam Korwin Kossakowski † | Titular Bishop of Limyra | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland |
| 52.8 | Appointed | Climent Llocer † | Bishop of Ibiza, Spain |
| 39.2 | Confirmed | Ferdinand Hermann Maria von Lüninck † | Bishop of Corvey, Germany | Bishop of Münster, Germany |
| 47.6 | Appointed | Rafael de Múzquiz y Aldunate † | Titular Archbishop of Seleucia in Isauria | Archbishop of Santiago de Compostela, Spain |
| 53.8 | Appointed | Vicente Navas y Márquez, O.P. † | Bishop of Comayagua, Honduras |
| 32.2 | Appointed | Antonio Maria Odescalchi † | Titular Archbishop of Iconium | Bishop of Jesi, Italy |
| 59.4 | Appointed | David Pilchowski † | Auxiliary Bishop of Vilnius, Lithuania |
| 59.4 | Appointed | David Pilchowski † | Titular Bishop of Echinus | Auxiliary Bishop of Vilnius, Lithuania |
| 60.1 | Appointed | Giovanni Antonio Pinelli † | Bishop of Trogir (Traù), Croatia | Bishop Emeritus |
| 58.5 | Appointed | Franz von Raigesfeld, S.J. † | Auxiliary Bishop of Ljubljana, Slovenia |
| 58.5 | Appointed | Franz von Raigesfeld, S.J. † | Titular Bishop of Derbe | Auxiliary Bishop of Ljubljana, Slovenia |
| 61.5 | Appointed | Félix Rico Rico † | Bishop of Teruel, Spain |
| 65.6 | Confirmed | Stefano Domenico Sceriman, O.P. † | Bishop of Chioggia, Italy |
| 34.0 | Confirmed | Maria-Thaddäus von Trauttmansdorf Wiensberg † | Bishop of Hradec Králové, Czechia | Cardinal, Archbishop of Olomouc, Czechia |
| 69.6 | Appointed | Luigi Valenti Gonzaga † | Cardinal-Bishop of Albano | Cardinal, Librarian of the Vatican Library |
| 57.3 | Appointed | Ippolito Antonio Vincenti Mareri † | Cardinal-Priest of Santi Nereo ed Achilleo | Cardinal, Cardinal-Bishop of Sabina |
| 58.7 | Confirmed | Juan Bautista de Zengotita y Bengoa, O. de M. † | Bishop of Puerto Rico (Porto Rico) |
| 44.5 | Appointed | Emidio Ziucci † | Titular Archbishop of Rhodus | Titular Archbishop of Damascus |
| 55.3 | Appointed | Antonio Felice Zondadari † | Cardinal, Archbishop of Siena, Italy |
| 5 Jun | | Born | Anton Ocskay † | | Bishop of Košice, Slovakia |
| 7 Jun | 51.5 | Ordained Bishop | Michele Argelati, O.S.M. † | Titular Bishop of Hippos | Bishop of Terracina, Priverno e Sezze, Italy |
| 51.1 | Ordained Bishop | Bonaventura (Domenico Giuseppe) Gazzola, O.F.M. Ref. † | Bishop of Cervia, Italy | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 54.0 | Ordained Bishop | Saverio Granata, C.R. † | Bishop of Agrigento (Girgenti), Italy |
| 32.2 | Ordained Bishop | Antonio Maria Odescalchi † | Titular Archbishop of Iconium | Bishop of Jesi, Italy |
| 8 Jun | 76.4 | Died | Giovanni Coccoli † | Bishop of Vulturara e Montecorvino, Italy |
| 14 Jun | 55.4 | Selected | Philippe Gemayel † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon | Bishop of Cyprus (Maronite) |
| 16 Jun | 58.6 | Died | Pasquale Martini † | Bishop of Città Ducale, Italy |
| 72.6 | Died | Domingos da Encarnação Pontével, O.P. † | Bishop of Mariana, Brazil |
| 17 Jun | 46.2 | Installed | Luis Ignatius Peñalver y Cárdenas † | Bishop of Louisiana and the Two Floridas (Saint Louis of New Orleans), USA | Archbishop Emeritus of Guatemala |
| 20 Jun | 32.2 | Appointed | Antonio Maria Odescalchi † | Apostolic Nuncio to Florence (Tuscany), Italy | Bishop of Jesi, Italy |
| 21 Jun | 46.3 | Ordained Bishop | Georg Karl Ignaz von Fechenbach zu Laudenbach † | Bishop of Würzburg, Germany |
| 60.1 | Ordained Bishop | Giovanni Antonio Pinelli † | Bishop of Trogir (Traù), Croatia | Bishop Emeritus |
| 23 Jun | | Born | Giovanni Brunelli † | | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 24 Jun | 46.5 | Ordained Bishop | Athanasius Saraff † | Titular Archbishop of Theodosiopolis in Armenia | Titular Bishop |
| 25 Jun | 51.0 | Selected | Vincenz Joseph Franz Sales von Schrattenbach † | Bishop of Lavant, Slovenia | Bishop of Brno, Czechia |
| 26 Jun | | Born | Antonio Gava † | | Bishop Emeritus of Belluno e Feltre, Italy |
| 29 Jun | 51.9 | Ordained Bishop | Pierre Denaut † | Titular Bishop of Canatha | Bishop of Québec, Canada |
| 56.4 | Appointed | Edward Dillon † | Apostolic Administrator of Kilfenora, Ireland | Archbishop of Tuam, Ireland |
| 56.4 | Succeeded | Edward Dillon † | Bishop of Kilmacduagh, Ireland | Archbishop of Tuam, Ireland |
| 22.8 | Ordained Priest | Mariano Baldassare Medici, O.P. † | Priest of Order of Friars Preachers | Bishop of Cervia, Italy |
| 69.0 | Died | Laurence Arthur Nihill † | Bishop of Kilfenora, Ireland |
| 30 Jun | 29.4 | Ordained Priest | Thomas Coen † | Priest | Bishop of Clonfert, Ireland |
| 50.2 | Installed | Antonio Despuig y Dameto † | Archbishop of Valencia, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |
| 2 Jul | | Born | Pierre Chatrousse † | | Bishop of Valence, France |
| 5 Jul | 60.0 | Died | Luigi Amici † | Archbishop of Camerino, Italy |
| 23.0 | Ordained Priest | Jan Kajetan Cywiński † | Priest | Auxiliary Bishop of Vilnius, Lithuania |
| 6 Jul | 39.2 | Appointed | Anton Anhelovych (Angellowicz) † | Bishop of Przemyśl, Sambor, et Sanok (Ukrainian), Poland | Archbishop of Lviv (Ukrainian), Ukraine |
| 10 Jul | 59.8 | Died | Bartolomé Fabro Palacios † | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 59.5 | Ordained Bishop | Agapios III Matar, B.S. † | Bishop of Saïda (Melkite Greek), Lebanon | Patriarch of Antiochia {Antioch} (Melkite Greek), Syria |
| 13 Jul | 64.9 | Died | Joseph Antoine Cocatrix, C.R.A. † | Abbot of Saint-Maurice, Switzerland |
| 15 Jul | 77.1 | Died | Felipe Pérez Santa María † | Auxiliary Bishop of Toledo, Spain |
| 16 Jul | 62.9 | Selected | Johann Karl von Hohenzollern-Hechingen † | Bishop of Warmia (Ermland), Poland |
| 19 Jul | | Born | József Viber † | | Auxiliary Bishop of Esztergom, Hungary |
| 22 Jul | 65.5 | Died | Ambrogio (Paulo Maria Michael) Mirelli, O.S.B. † | Archbishop of Chieti, Italy |
| 24 Jul | 78.1 | Died | Giovanni Rondinelli † | Bishop of Comacchio, Italy |
| 25 Jul | 49.7 | Ordained Bishop | Teodoro Loredano Balbi † | Bishop of Novigrad (Cittanova), Croatia |
| 26 Jul | 47.7 | Ordained Bishop | Rafael de Múzquiz y Aldunate † | Titular Archbishop of Seleucia in Isauria | Archbishop of Santiago de Compostela, Spain |
| 51.1 | Confirmed | Vincenz Joseph Franz Sales von Schrattenbach † | Bishop of Lavant, Slovenia | Bishop of Brno, Czechia |
| 27 Jul | | Born | Alessandro Asinari di San Marzano † | | Titular Archbishop of Ephesus |
| 28 Jul | 47.5 | Selected | Joseph Gaspard Exquis, C.R.A. † | Abbot of Saint-Maurice, Switzerland |
| 30 Jul | 72.5 | Died | Giovanni Crisostomo de Clugny, O.F.M. Conv. † | Archbishop of Durrës (Durazzo) (Albanian), Albania |
| 69.4 | Died | Urbain-René de Hercé † | Bishop of Dol, France |
| 31 Jul | | Born | Giacomo Piccolomini † | | Cardinal, Priest of the Roman Curia - Other |
| Aug | | Died | Luc d’Aïntab † | Bishop of Marasc (Armenian), Turkey |
| 59.0 | Resigned | Giuseppe Firrao † | Apostolic Nuncio to Venice, Italy | Cardinal, Secretary of the Congregation of Bishops and Regulars |
| 55.5 | Resigned | Antonio Felice Zondadari † | Secretary of the Congregation for Propagation of the Faith | Cardinal, Archbishop of Siena, Italy |
| 2 Aug | 66.6 | Ordained Bishop | Francisco Javier Cabrera Velasco † | Bishop of Orihuela, Spain | Bishop of Ávila, Spain |
| 24.6 | Ordained Deacon | Franciszek Ksawery Zachariasiewicz † | Deacon of Lviv (Armenian), Ukraine | Bishop of Przemyśl, Poland |
| 6 Aug | 39.4 | Ordained Priest | Ferdinand Hermann Maria von Lüninck † | Priest | Bishop of Münster, Germany |
| 8 Aug | 48.7 | Selected | Giuseppe Maria Peruzzi † | Bishop of Caorle, Italy | Bishop of Vicenza, Italy |
| 9 Aug | 24.6 | Ordained Priest | Franciszek Ksawery Zachariasiewicz † | Priest of Lviv (Armenian), Ukraine | Bishop of Przemyśl, Poland |
| 10 Aug | 50.3 | Selected | Antonio Despuig y Dameto † | Archbishop of Sevilla {Seville}, Spain | Cardinal, Archbishop Emeritus |
| 12 Aug | | Born | Pierre-Louis Parisis † | | Bishop of Arras (-Boulogne-Saint-Omer), France |
| 14 Aug | 57.0 | Appointed | Giuseppe Angeluni, B.C. † | Archbishop of Durrës (Durazzo) (Albanian), Albania |
| 16 Aug | 70.6 | Ordained Bishop | Christoph Franz von Buseck † | Bishop of Bamberg, Germany |
| 28.6 | Ordained Deacon | Jakob Frint † | Deacon of Wien {Vienna}, Austria | Bishop of Sankt Pölten, Austria |
| 21 Aug | 61.5 | Died | Joseph Franz Anton von Auersperg † | Cardinal, Bishop of Passau, Germany |
| 22 Aug | | Born | Auguste Jeanjean † | | Priest of New Orleans, Louisiana, USA |
| 23 Aug | 57.0 | Ordained Bishop | Giuseppe Angeluni, B.C. † | Archbishop of Durrës (Durazzo) (Albanian), Albania |
| 24 Aug | 44.7 | Ordained Bishop | Emidio Ziucci † | Titular Archbishop of Rhodus | Titular Archbishop of Damascus |
| 27 Aug | 54.8 | Installed | Joseph Christian Franz de Paula zu Hohenlohe-Waldenburg-Bartenstein † | Bishop of Wrocław (Breslau), Poland |
| 28 Aug | | Born | Agustín Gómez Cabezas y Sildo † | | Bishop of Santa Cruz de la Sierra, Bolivia |
| Born | Joannes Augustinus Paredis † | | Bishop of Roermond, Netherlands |
| 29 Aug | | Born | Marie-Auguste Fabre-des-Essarts † | | Bishop of Blois, France |
| 30 Aug | 28.7 | Ordained Priest | Jakob Frint † | Priest of Wien {Vienna}, Austria | Bishop of Sankt Pölten, Austria |
| 53.0 | Ordained Bishop | Climent Llocer † | Bishop of Ibiza, Spain |
| Born | Paolo Maria Mondio † | | Prelate of Santa Lucia del Mela, Italy |