| Date | Age | Event | Bishop | Title | Current Title |
| 2 May | 23.1 | Ordained Priest | Manoel Joaquim da Silveira † | Priest | Archbishop of São Salvador da Bahia, Brazil |
| 78.3 | Died | Antonio Maria Nappi † | Bishop of Ascoli Satriano e Cerignola, Italy |
| 3 May | 59.3 | Died | Carolus von Aulock † | Auxiliary Bishop of Wrocław (Breslau), Poland |
| 4 May | | Born | José María Carpenter Aponte † | Arequipa | Auxiliary Bishop of Lima, Peru |
| 23.6 | Ordained Priest | Joseph Freusberg † | Priest of Paderborn, Germany | Auxiliary Bishop |
| 59.4 | Died | João José Vaz Pereira † | Auxiliary Bishop of Braga, Portugal |
| 8 May | 60.2 | Died | Antonio Baldini † | Titular Archbishop of Neocaesarea in Ponto |
| 19 May | | Born | José Ignacio Árciga Ruiz de Chávez † | Pázcuaro | Archbishop of Michoacán, México |
| 20 May | 38.3 | Selected | Jacques-Marie-Antoine-Célestin du Pont † | Bishop of Saint-Dié, France | Cardinal, Archbishop of Bourges, France |
| 23 May | | Born | John Walsh † | Mooncoin, Ireland | Archbishop of Toronto, Ontario, Canada |
| 27 May | 64.4 | Died | Juan Baltasar Toledano † | Bishop of Valladolid, Spain |
| 28 May | | Born | Elzear Torreggiani, O.F.M. Cap. † | Porto di Recanati, Italy | Bishop of Armidale, Australia |
| 29 May | 38.4 | Succeeded | Michael Anthony Fleming, O.F.M. † | Vicar Apostolic of Newfoundland, Canada | Bishop of Newfoundland, Canada |
| 59.6 | Appointed | Pietro Francesco Galleffi † | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 30 May | 69.4 | Ordained Bishop | Aleksandar Alagović † | Bishop of Zagreb (Agram), Croatia |
| 35.9 | Ordained Bishop | Jean-Louis Taberd, M.E.P. † | Titular Bishop of Isauropolis | Vicar Apostolic of Cochin {Cocincina}, Viet Nam |
| 26.9 | Ordained Priest | James Walshe † | Priest | Bishop of Kildare and Leighlin, Ireland |
| Jun | 24.5 | Ordained Priest | Ponciano Arciniega † | Priest | Bishop of Mondoñedo, Spain |
| 5 Jun | 22.6 | Ordained Priest | Francesco Brigante Colonna † | Priest | Bishop of Recanati e Loreto, Italy |
| 24.2 | Ordained Priest | Etienne-Louis Charbonnaux, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Mysore, India |
| 25.1 | Ordained Priest | Henri Louis Charles Maret † | Priest | Titular Archbishop of Naupactus |
| 24.8 | Ordained Priest | Jean-Claude Miche, M.E.P. † | Priest of La Société des Missions Etrangères | Vicar Apostolic of Western Cochin {Cocincina Occidentale}, Viet Nam |
| 22.8 | Ordained Priest | Ignazio Selitti † | Priest | Bishop Emeritus of Melfi e Rapolla, Italy |
| 6 Jun | 33.5 | Ordained Bishop | Francis Patrick Kenrick † | Titular Bishop of Arathia | Archbishop of Baltimore, Maryland, USA |
| 7 Jun | 65.4 | Died | Thomas Scallan, O.F.M. † | Vicar Apostolic of Newfoundland, Canada |
| 8 Jun | | Born | Francesco Ricci Paracciani † | Roma, Italy | Cardinal, Archpriest of the Basilica di San Pietro in Vaticano {Saint Peter Basilica} |
| 9 Jun | 23.0 | Ordained Priest | Gabriel Mariássy † | Priest | Auxiliary Bishop of Eger, Hungary |
| 11 Jun | | Died | Marcelino José Da Silva † | Bishop Emeritus of Macau, China |
| 13 Jun | 55.6 | Ordained Bishop | Severo Leonardo Andriani Escofet † | Bishop of Pamplona, Spain | Bishop of Pamplona (-Tudela), Spain |
| 24.3 | Ordained Priest | Boulos Boutros Mass’ad (Massaad) † | Priest | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 57.4 | Ordained Bishop | Juan Sánchez Barragán y Vera † | Bishop of Ceuta, Spain |
| 69.0 | Ordained Bishop | Antonio Török † | Bishop of Csanád, Hungary |
| 14 Jun | 80.6 | Died | Václav (Wenzel) Léopold von Chlumčansky † | Archbishop of Praha {Prague}, Czech Republic |
| 63.4 | Selected | Pál Mátyás Szutsits † | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 15 Jun | 23.6 | Ordained Priest | Marie-Jean-François Allard, O.M.I. † | Priest of Oblates of Mary Immaculate | Vicar Apostolic Emeritus of Natal, South Africa |
| 16 Jun | 79.9 | Retired | Jacques-Alexis Jacquemin † | Bishop of Saint-Dié, France | Bishop Emeritus |
| 18 Jun | | Appointed | Frederic Cao, Sch. P. † | Vicar Apostolic of Ava e Pegù, Myanmar | Vicar Apostolic Emeritus |
| Appointed | Frederic Cao, Sch. P. † | Titular Bishop of Zama Major | Vicar Apostolic Emeritus of Ava e Pegù, Myanmar |
| 20 Jun | | Ordained Bishop | Frederic Cao, Sch. P. † | Titular Bishop of Zama Major | Vicar Apostolic Emeritus of Ava e Pegù, Myanmar |
| 24 Jun | 30.0 | Ordained Bishop | Leo Raymond De Neckère, C.M. † | Bishop of New Orleans, Louisiana, USA |
| 26 Jun | 54.1 | Resigned | Luigi Emmanuele Nicolo Lambruschini, B. † | Archbishop of Genova, Italy | Cardinal, Prefect of the Congregation of Rites |
| 27 Jun | 45.2 | Died | François-Hyacinthe-Jean Feutrier † | Bishop of Beauvais, France |
| 30 Jun | 29.5 | Ordained Priest | Josephus Gregorius Hagi † | Priest | Bishop of Garin (Erzerum) (Armenian) |
| 60.4 | Resigned | Tomas Manoel de Noronha e Brito, O.P. † | Bishop of Olinda, Brazil | Bishop Emeritus |
| Jul | 54.1 | Resigned | Luigi Emmanuele Nicolo Lambruschini, B. † | Apostolic Nuncio to France | Cardinal, Prefect of the Congregation of Rites |
| 3 Jul | 61.3 | Appointed | Giacinto Placido Zurla, O.S.B. † | Cardinal, Prefect of the Congregation for Studies |
| 4 Jul | | Born | William Robert Brownlow † | Winslow | Bishop of Clifton, England, Great Britain |
| 5 Jul | 65.1 | Confirmed | Giovanni Battista Accusani † | Bishop of Vigevano, Italy |
| 63.0 | Confirmed | Giuseppe Vincenzo Airenti, O.P. † | Archbishop of Genova, Italy |
| 73.6 | Appointed | Tommaso Arezzo † | Cardinal, Official of the Roman Curia - Other |
| 65.0 | Confirmed | Alessandro Berettini † | Bishop of Teramo, Italy |
| 69.0 | Appointed | Adeodato Caleffi, O.S.B. † | Bishop of Modena (e Nonantola), Italy |
| 66.3 | Confirmed | Jean-Joseph-Marie-Victoire de Cosnac † | Archbishop of Sens (-Auxerre), France |
| 51.5 | Confirmed | Etienne-Bruno-Marie d’Arbou † | Bishop of Bayonne, France | Bishop Emeritus |
| 57.7 | Confirmed | Paul-Thérèse-David d’Astros † | Cardinal, Archbishop of Toulouse (-Narbonne), France |
| 38.4 | Confirmed | Jacques-Marie-Antoine-Célestin du Pont † | Bishop of Saint-Dié, France | Cardinal, Archbishop of Bourges, France |
| 63.2 | Appointed | Giovanni Francesco Falzacappa † | Cardinal-Priest of Albano | Cardinal, Prefect of the Apostolic Signatura |
| 45.0 | Confirmed | Romain-Frédéric Gallard † | Bishop of Meaux, France | Coadjutor Archbishop of Reims, France |
| 38.9 | Confirmed | Pierre Giraud † | Bishop of Rodez, France | Cardinal, Archbishop of Cambrai, France |
| 52.2 | Confirmed | Antonio Giurico † | Bishop of Dubrovnik (Ragusa), Croatia |
| Confirmed | Youhanan VIII Hormez † | Patriarch of Babylon {Babilonia} (Chaldean), Iraq |
| 46.3 | Confirmed | Francesco Maria Icheri di Malabaila † | Bishop of Casale Monferrato, Italy |
| 54.1 | Appointed | Luigi Emmanuele Nicolo Lambruschini, B. † | Titular Archbishop of Berytus | Cardinal, Prefect of the Congregation of Rites |
| 54.9 | Appointed | Karl Anton Joseph Lüpke † | Auxiliary Bishop of Osnabrück, Germany |
| 54.9 | Appointed | Karl Anton Joseph Lüpke † | Titular Bishop of Anthedon | Auxiliary Bishop of Osnabrück, Germany |
| 73.5 | Appointed | Bartolomeo Pacca † | Cardinal-Bishop of Ostia (e Velletri) | Cardinal, Secretary of the Roman Curia - Other |
| 73.5 | Appointed | Bartolomeo Pacca † | Archpriest of the Arcibasilica di San Giovanni in Laterano {Saint John Lateran Basilica} | Cardinal, Secretary of the Roman Curia - Other |
| Born | Paolo Giuseppe Palma, C.P. † | Roma | Archbishop of Bucarest {Bucureşti}, Romania |
| 60.7 | Appointed | Carlo Maria Pedicini † | Bishop of Palestrina, Italy | Cardinal, Bishop of Porto e Santa Rufina, Italy |
| 60.7 | Appointed | Carlo Maria Pedicini † | Cardinal-Bishop of Palestrina | Cardinal, Bishop of Porto e Santa Rufina, Italy |
| 42.4 | Appointed | Louis-François-Auguste de Rohan-Chabot † | Cardinal-Priest of Santissima Trinità al Monte Pincio | Cardinal, Archbishop of Besançon, France |
| 42.4 | Elevated to Cardinal | Louis-François-Auguste de Rohan-Chabot † | Cardinal, Archbishop of Besançon, France |
| 47.2 | Confirmed | Moritz-Fabian Roten † | Bishop of Sion {Sitten}, Switzerland |
| 56.8 | Confirmed | José Maria Seguí, O.S.A. † | Archbishop of Manila, Philippines |
| 6 Jul | | Born | Benedetto Mariani † | Rocca Santo Stefano | Auxiliary Bishop of Sabina (-Farfa), Italy |
| Appointed | Antonius Nurigian † | Archbishop of Constantinople (Istanbul) (Armenian), Turkey |
| 7 Jul | 22.8 | Ordained Deacon | Ignacy Hołowiński † | Deacon | Archbishop of Mohilev, Belarus |
| 11 Jul | 65.0 | Ordained Bishop | Alessandro Berettini † | Bishop of Teramo, Italy |
| Ordained Bishop | Antonius Nurigian † | Archbishop of Constantinople (Istanbul) (Armenian), Turkey |
| 13 Jul | | Born | Jean-Baptiste Frérot † | Buncey-Sur-Seine | Bishop of Angoulême, France |
| 18 Jul | 57.7 | Selected | Clemente Maria Basetti † | Bishop of Carpi, Italy |
| 23.9 | Ordained Priest | Jacques-Antoine-Claude-Marie Boudinet † | Priest | Bishop of Amiens, France |
| 46.3 | Ordained Bishop | Francesco Maria Icheri di Malabaila † | Bishop of Casale Monferrato, Italy |
| 43.7 | Ordained Bishop | Paolo Miossich † | Bishop of Split-Makarska (Spalato-Macarska), Croatia |
| 20 Jul | | Appointed | John Cantwell † | Bishop of Meath, Ireland |
| 73.2 | Died | Remigio Crescini, O.S.B. † | Cardinal, Bishop of Parma, Italy |
| 25 Jul | 80.1 | Died | Manuel Benito y Tabernero † | Bishop of Solsona, Spain |
| 73.6 | Died | Francesco Cesarei Leoni † | Cardinal, Bishop of Jesi, Italy |
| 26 Jul | 16.4 | Professed | Rudesindo Salvado, O.S.B. † | Member of Order of Saint Benedict | Abbot of New Norcia, Australia |
| 31 Jul | 72.7 | Died | Konstantin Stanich † | Bishop of Križevci (Kreutz) (Križevci), Croatia |
| 1 Aug | | Born | Giovanni Battista Bongiorni † | Palazzolo Acreide | Bishop Emeritus of Caltagirone, Italy |
| 23.4 | Ordained Deacon | Benedetto Riccabona de Reinchenfels † | Deacon of Trento, Italy | Bishop |
| 6 Aug | 23.9 | Ordained Priest | Johann Baptist Orbin † | Priest of Freiburg im Breisgau, Germany | Archbishop |
| 7 Aug | | Born | Antônio de Macedo Costa † | Maragogipe | Archbishop of São Salvador da Bahia, Brazil |
| Born | Félix-Clair Ridel, M.E.P. † | Chantenay-sur-Loire, France | Vicar Apostolic of Corea |
| 8 Aug | 23.4 | Ordained Priest | Benedetto Riccabona de Reinchenfels † | Priest of Trento, Italy | Bishop |
| 61.1 | Ordained Bishop | Antonio Savorin † | Bishop of Chioggia, Italy |
| 10 Aug | 70.9 | Died | Pietro Vidoni (Jr.) † | Cardinal, Priest of Cremona, Italy |
| 11 Aug | 50.6 | Succeeded | Michael Collins † | Bishop of Ross, Ireland |
| 50.6 | Succeeded | Michael Collins † | Bishop of Cloyne, Ireland | Bishop of Ross, Ireland |
| 77.2 | Died | William Coppinger † | Bishop of Cloyne, Ireland |
| 15 Aug | 60.8 | Ordained Bishop | Carlo Maria Pedicini † | Bishop of Palestrina, Italy | Cardinal, Bishop of Porto e Santa Rufina, Italy |
| 24.6 | Ordained Priest | José Bernardo Piñol y Aycinena † | Priest | Archbishop of Guatemala |
| 24 Aug | 56.4 | Selected | Juan Antonio Rivadeneyra † | Bishop of Valladolid, Spain |
| Born | Michel Rosset † | Betton-Bettonet | Bishop of Saint-Jean-de-Maurienne, France |
| 27 Aug | | Appointed | Nicolaus Bianchi † | Archbishop of Skopje, Macedonia | Archbishop of Durrës (Durazzo), Albania |
| Born | Agustín Lucero Lazcano, O.P. † | Putaendo | Bishop of San Carlos de Ancud, Chile |
| 28 Aug | 47.4 | Ordained Bishop | Moritz-Fabian Roten † | Bishop of Sion {Sitten}, Switzerland |
| 30 Aug | | Born | François-Marie-Anatole de Rovérié de Cabrières † | Beaucaire | Cardinal, Bishop of Montpellier (-Lodève-Béziers-Agde-Saint-Pons-de-Thomières), France |
| 31 Aug | 63.7 | Ordained Bishop | Andrzej Benedykt Kłagiewicz † | Titular Bishop of Chrysopolis in Arabia | Bishop of Vilnius, Lithuania |
| 71.6 | Selected | Alois Jozef Krakowski von Kolowrat † | Archbishop of Praha {Prague}, Czech Republic |