| Date | Age | Event | Bishop | Title | Current Title |
| May | 44.7 | Appointed | Francesco Capaccini † | Apostolic Internuncio to Netherlands | Cardinal, Substitute (Sostituto) of the Secretariat of State |
| 1 May | 25.6 | Ordained Deacon | Luis José Gabriel Segura y Cubas † | Deacon | Bishop of Paraná, Argentina |
| 3 May | 40.3 | Ordained Bishop | Paul Aroutin † | Bishop of Alep [Beroea, Halab] (Maronite), Syria |
| 25.7 | Ordained Priest | Luis José Gabriel Segura y Cubas † | Priest | Bishop of Paraná, Argentina |
| 4 May | 63.8 | Selected | Alessandro Berrettini † | Bishop of Teramo, Italy |
| 55.2 | Selected | Giuseppe-Maria de Letto (Leto) † | Bishop of Valva e Sulmona, Italy |
| 7 May | 67.5 | Died | Hilarión Diéz Fernández, O.S.A. † | Archbishop of Manila, Philippines |
| 10 May | 22.6 | Ordained Priest | Giacinto Maria Barberi, O.P. † | Priest of Order of Friars Preachers | Bishop of Nicastro, Italy |
| 35.3 | Appointed | Ignazio Giustiniani † | Vicar Apostolic of Chios (Scio), Greece | Bishop |
| 35.3 | Appointed | Ignazio Giustiniani † | Titular Bishop of Aenus | Bishop of Chios (Scio), Greece |
| 70.7 | Ordained Bishop | Wawrzyniec Gutowski † | Titular Bishop of Gerasa | Auxiliary Bishop of Płock, Poland |
| Born | John Joseph Hogan † | | Bishop of Kansas City, Missouri, USA |
| 15 May | 33.2 | Appointed | William Kinsella † | Bishop of Ossory, Ireland |
| 33.6 | Appointed | Michael Portier † | Bishop of Mobile, Alabama, USA |
| 17 May | 23.0 | Ordained Priest | János Ranolder † | Priest | Bishop of Veszprém, Hungary |
| 60.5 | Ordained Bishop | Teofil von Wolicki † | Archbishop of Gniezno e Poznań, Poland |
| 18 May | 63.8 | Confirmed | Emanuele Maria Bellorado, O.P. † | Bishop of Sant’Agata de’ Goti, Italy |
| 63.8 | Confirmed | Emanuele Maria Bellorado, O.P. † | Bishop of Acerra, Italy | Bishop of Sant’Agata de’ Goti, Italy |
| 68.4 | Confirmed | Donat Nicholas Vincenzo Zaccaria Boccardo, O.F.M. Cap. † | Bishop of Crotone (Cotrone), Italy |
| 54.5 | Confirmed | Luigi Francesco Paolo Maria Bovio, O.S.B. † | Bishop of Melfi e Rapolla, Italy |
| 47.0 | Confirmed | Leone Ciampa, O.F.M. Disc. † | Archbishop of Reggio Calabria, Italy | Archbishop of Sorrento, Italy |
| 62.2 | Appointed | Jean-Joseph Delplancq † | Bishop of Tournai {Doornik}, Belgium |
| 58.0 | Confirmed | Matteo Franco, C.P.O. † | Bishop of Catanzaro, Italy |
| 70.4 | Appointed | Emmanuele de Gregorio † | Cardinal-Bishop of Frascati | Cardinal, Major Penitentiary of the Apostolic Penitentiary |
| 62.0 | Confirmed | Michele Lanzetta † | Bishop of Oria, Italy | Bishop of Lacedonia, Italy |
| 49.0 | Confirmed | Josef Anton Salzmann † | Bishop of Basel, Switzerland |
| 48.8 | Confirmed | Sebastiano Soldati † | Bishop of Treviso, Italy |
| 54.2 | Confirmed | José Talayero Royo, O.P. † | Bishop of Albarracin, Spain |
| 39.1 | Appointed | Cornelius Richard Antoon van Bommel † | Bishop of Liège, Belgium |
| 49.6 | Appointed | Jan Frans (Jean-François) Van de Velde † | Bishop of Gent {Ghent, Gand}, Belgium |
| 19 May | 29.3 | Ordained Priest | Motiejus Wołonczewscki † | Priest | Bishop of Žemaičiai (Samogizia o Tels; Żmudź), Lithuania |
| 21 May | 64.0 | Appointed | Giovanni Antonio Benvenuti † | Cardinal-Priest of Santi Quirico e Giulitta | Cardinal, Bishop of Osimo e Cingoli, Italy |
| 53.6 | Confirmed | Michele Bombini † | Bishop of Cassano all’Jonio, Italy |
| 70.2 | Appointed | Pietro Caprano † | Cardinal-Priest of Santi Nereo ed Achilleo | Cardinal, Prefect of the Congregation of the Index |
| 40.5 | Installed | Benedetto Colonna Barberini di Sciarra † | Cardinal-Priest of Santa Maria sopra Minerva | Cardinal, Archpriest of the Arcibasilica di San Giovanni in Laterano {Saint John Lateran Basilica} |
| 55.6 | Installed | Gustave-Maximilien-Juste de Croÿ-Solre † | Cardinal-Priest of Santa Sabina | Cardinal, Archbishop of Rouen, France |
| 68.5 | Appointed | Antonio Domenico Gamberini † | Cardinal-Priest of Santa Prassede | Cardinal, Cardinal-Bishop of Sabina |
| 59.7 | Installed | Karl Kajetan von Gaisruck (Gaysruck) † | Cardinal-Priest of San Marco | Cardinal, Archbishop of Milano {Milan}, Italy |
| 68.2 | Installed | Jean-Baptist-Marie-Anne-Antoine de Latil † | Cardinal-Priest of San Sisto | Cardinal, Archbishop of Reims, France |
| 58.5 | Appointed | Niccolò Mazzoni † | Bishop of Terni, Italy |
| 54.1 | Appointed | Franciszek di Paolo Pawłowski † | Coadjutor Bishop of Płock, Poland | Bishop |
| 64.3 | Confirmed | Vincenzo Rocca † | Bishop of Larino, Italy |
| 69.3 | Appointed | Georg Michael Wittmann † | Auxiliary Bishop of Regensburg, Germany |
| 69.3 | Appointed | Georg Michael Wittmann † | Titular Bishop of Comana Armeniae | Auxiliary Bishop of Regensburg, Germany |
| 24 May | 53.6 | Ordained Bishop | Michele Bombini † | Bishop of Cassano all’Jonio, Italy |
| 54.5 | Ordained Bishop | Luigi Francesco Paolo Maria Bovio, O.S.B. † | Bishop of Melfi e Rapolla, Italy |
| 58.0 | Ordained Bishop | Matteo Franco, C.P.O. † | Bishop of Catanzaro, Italy |
| 62.0 | Ordained Bishop | Michele Lanzetta † | Bishop of Oria, Italy | Bishop of Lacedonia, Italy |
| 26 May | 68.4 | Ordained Bishop | Donat Nicholas Vincenzo Zaccaria Boccardo, O.F.M. Cap. † | Bishop of Crotone (Cotrone), Italy |
| 47.0 | Ordained Bishop | Leone Ciampa, O.F.M. Disc. † | Archbishop of Reggio Calabria, Italy | Archbishop of Sorrento, Italy |
| Born | Pierre-Marie Osouf, M.E.P. † | | Archbishop of Tōkyō, Japan |
| 64.3 | Ordained Bishop | Vincenzo Rocca † | Bishop of Larino, Italy |
| 27 May | 74.3 | Died | Jean-François Martin de Boisville † | Bishop of Dijon, France |
| 28 May | | Born | Germán de Ascensión Villalvazo y Rodríguez † | | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 31 May | 70.4 | Appointed | Emmanuele de Gregorio † | Cardinal, Major Penitentiary of the Apostolic Penitentiary |
| 70.4 | Ordained Bishop | Emmanuele de Gregorio † | Cardinal-Bishop of Frascati | Cardinal, Major Penitentiary of the Apostolic Penitentiary |
| Jun | 27.4 | Converted | Iacobus (Yacoub) Eliani (Haliani) † | Archbishop of Damas (Syrian), Syria |
| 1 Jun | 24.4 | Ordained Priest | Estefan El-Khazen (Gazeno) † | Priest | Archbishop of Damas (Maronite), Syria |
| 3 Jun | 69.8 | Selected | Charles-Alexandre de Richery † | Archbishop of Aix (-Arles-Embrun), France |
| 22.9 | Ordained Priest | William Barber Tyler † | Priest of Boston, Massachusetts, USA | Bishop of Hartford, Connecticut, USA |
| 4 Jun | 67.2 | Died | Giacomo Coccia † | Prelate of Santa Lucia del Mela, Italy |
| 5 Jun | 21.5 | Ordained Deacon | Johann Valentin von Reißmann † | Deacon of Würzburg, Germany | Bishop |
| 7 Jun | 58.5 | Ordained Bishop | Niccolò Mazzoni † | Bishop of Terni, Italy |
| 8 Jun | 22.1 | Ordained Deacon | Manoel Joaquim da Silveira † | Deacon | Archbishop of São Salvador da Bahia, Brazil |
| 11 Jun | 78.6 | Died | Louis-Siffrein-Joseph de Salamon † | Bishop of Saint-Flour, France |
| 13 Jun | 25.4 | Ordained Priest | Jean-Rémi Bessieux, C.S.Sp. † | Priest of Congregation of the Holy Spirit | Vicar Apostolic of Two Guineas {Des Deux Guinées}, Gabon |
| 24.0 | Ordained Priest | Giuseppe Caiazzo, O.E.S.A. † | Priest of Order of Hermits of St. Augustine | Archbishop of Otranto, Italy |
| 24.2 | Ordained Priest | Pierre-Louis Coeur † | Priest | Bishop of Troyes, France |
| 23.8 | Ordained Priest | Antoine-Charles Cousseau † | Priest | Bishop Emeritus of Angoulême, France |
| 22.5 | Ordained Priest | Mariano Falcinelli Antoniacci, O.S.B. † | Priest of Order of Saint Benedict | Cardinal, Cardinal-Priest of San Marcello |
| 24.1 | Ordained Priest | Jean-Baptiste-Amédée Georges-Massonnais † | Priest of Bordeaux, France | Bishop of Périgueux (-Sarlat), France |
| 23.6 | Ordained Priest | Prosper-Michel-Arnaud Hiraboure † | Priest of Bayonne, France | Bishop of Aire et Dax, France |
| 24.1 | Ordained Priest | Gregoria María López y Zaragoza † | Priest | Bishop of Plasencia, Spain |
| 24.2 | Ordained Priest | Louis-Antoine-Augustin Pavy † | Priest of Lyon (-Vienne), France | Bishop of Alger, Algeria |
| 27.5 | Ordained Priest | Jean-Baptiste-François Pompallier † | Priest of Lyon, France | Bishop Emeritus of Auckland, New Zealand |
| 28.8 | Ordained Priest | Angelo Francesco Ramazzotti † | Priest | Patriarch of Venezia {Venice}, Italy |
| 22.4 | Ordained Priest | Simone Spilotros, O. Carm. † | Priest of Order of Our Lady of Mt. Carmel | Bishop of Tricarico, Italy |
| 22.5 | Ordained Priest | Pasquale Taccone † | Priest | Bishop of Teramo, Italy |
| 22.5 | Ordained Priest | Petrus Maria Vrancken † | Priest | Vicar Apostolic Emeritus of Batavia, Indonesia |
| 14 Jun | 58.0 | Selected | Charles de Douhet d’Auzers † | Bishop of Nevers, France |
| Born | Bernard-Thadée Petitjean, M.E.P. † | | Vicar Apostolic of Southern Japan |
| 66.9 | Selected | Jacques Raillon † | Bishop of Dijon, France | Archbishop of Aix (-Arles-Embrun), France |
| 19 Jun | 24.1 | Ordained Priest |
Étienne-Raymond Albrand, M.E.P. † | Priest of Gap, France | Vicar Apostolic of Kuiceu (Kweichow), China |
| 30.7 | Resigned | Costantino Patrizi Naro † | Apostolic Nuncio to Florence (Tuscany), Italy | Cardinal, Secretary of the Congregation for Universal Inquisition |
| 25 Jun | 58.4 | Died | James Magauran † | Bishop of Ardagh (and Clonmacnois), Ireland |
| 28 Jun | 69.4 | Ordained Bishop | Georg Michael Wittmann † | Titular Bishop of Comana Armeniae | Auxiliary Bishop of Regensburg, Germany |
| 29 Jun | | Born | Filippo Allegro † | | Bishop of Albenga, Italy |
| 37.3 | Ordained Bishop | Barthélemy Bruguière, M.E.P. † | Titular Bishop of Capsus | Vicar Apostolic of Corea |
| 30 Jun | | Born | Yves-Marie Croc, M.E.P. † | | Vicar Apostolic of Southern Tonking {Tonkino Meridionale}, Viet Nam |
| 8 Jul | 64.4 | Died | Emmanuele Custo † | Bishop of Mazara del Vallo, Italy |
| 10 Jul | 37.5 | Appointed | Michael Anthony Fleming, O.F.M. Ref. † | Coadjutor Vicar Apostolic of Newfoundland, Canada | Bishop of Newfoundland, Canada |
| 37.5 | Appointed | Michael Anthony Fleming, O.F.M. Ref. † | Titular Bishop of Carpasia | Bishop of Newfoundland, Canada |
| 61.6 | Died | Francesco Saverio Triggiani, O.F.M. Conv. † | Bishop Emeritus of Oria, Italy |
| 12 Jul | 23.6 | Ordained Priest | Louis-Martin Porchez † | Priest | Bishop of Martinique (Fort-de-France e Saint Pierre), Antilles |
| Ordained Bishop | Luca de Cigalla † | Bishop of Santorini {Thira}, Greece |
| 14 Jul | 67.9 | Died | Ferdinando Mattei † | Bishop of Malta |
| 15 Jul | 42.7 | Selected | François-Marie-Edouard de Gualy † | Bishop of Saint-Flour, France | Archbishop of Albi, France |
| 17 Jul | 54.2 | Appointed | Pietro Ostini † | Apostolic Nuncio to Brazil | Cardinal, Prefect of the Congregation of the Council |
| 21 Jul | 60.0 | Died | Pablo Hernández, O.SS.T. † | Bishop of Ceuta, Spain |
| Born | Manuel Ignacio Riaño, O.P. † | | Vicar Apostolic of Central Tonking {Tonkino Centrale}, Viet Nam |
| 25 Jul | 25.0 | Ordained Deacon | Gregor (Leonhard Andreas) von Scherr, O.S.B. † | Deacon of Regensburg, Germany | Archbishop of München und Freising {Munich}, Germany |
| 26 Jul | 65.7 | Selected | Santos Gómez Marañón, O.S.A. † | Bishop of Cebu, Philippines |
| 33.4 | Ordained Bishop | William Kinsella † | Bishop of Ossory, Ireland |
| 49.2 | Ordained Bishop | Josef Anton Salzmann † | Bishop of Basel, Switzerland |
| 27 Jul | | Born | Jean-Pierre Boyer † | | Cardinal, Archbishop of Bourges, France |
| 56.2 | Appointed | Ugolino Carlini † | Bishop of Cortona, Italy |
| 72.2 | Elevated to Cardinal | Remigio Crescini, O.S.B. † | Cardinal, Bishop of Parma, Italy |
| 55.5 | Confirmed | Giuseppe-Maria de Letto (Leto) † | Bishop of Valva e Sulmona, Italy |
| 58.2 | Confirmed | Charles de Douhet d’Auzers † | Bishop of Nevers, France |
| 32.0 | Confirmed | Bénigne-Urbain-Jean-Marie du Trousset d’Héricourt † | Bishop of Autun, France |
| 62.3 | Confirmed | Juan Nepomuceno Gómez Durán † | Bishop of Málaga, Spain |
| 68.0 | Confirmed | Louis-Charles-Jean-Baptiste Michel † | Bishop of Fréjus, France |
| 60.6 | Elevated to Cardinal | Cesare Nembrini Pironi Gonzaga † | Cardinal, Bishop of Ancona e Numana, Italy |
| 50.3 | Appointed | Ippolito Niccolai † | Bishop of Montepulciano, Italy |
| 61.4 | Confirmed | Godehard Joseph Osthaus † | Bishop of Hildesheim, Germany |
| 69.9 | Confirmed | Charles-Alexandre de Richery † | Archbishop of Aix (-Arles-Embrun), France |
| 63.7 | Died | Bernardo Rossi † | Bishop of San Severo, Italy |
| 55.8 | Appointed | José Maria Seguí Molas, O.S.A. † | Auxiliary Bishop of Manila, Philippines | Archbishop |
| 55.8 | Appointed | José Maria Seguí Molas, O.S.A. † | Titular Bishop of Hierocaesarea | Archbishop of Manila, Philippines |
| 61.5 | Confirmed | Wincenty Saryusz Karol Skórkowski † | Bishop of Kraków, Poland |
| 29 Jul | 77.2 | Died | Vincenzo Maria Mossi de Morano † | Bishop Emeritus of Alessandria (della Paglia), Italy |
| 31 Jul | | Born | Francesco Vitagliano † | | Bishop Emeritus of Nocera de’ Pagani, Italy |
| Aug | 22.4 | Ordained Deacon | William Riddell † | Deacon of Northern District, England, Great Britain | Vicar Apostolic |
| 2 Aug | 56.2 | Ordained Bishop | Ugolino Carlini † | Bishop of Cortona, Italy |
| 55.5 | Ordained Bishop | Giuseppe-Maria de Letto (Leto) † | Bishop of Valva e Sulmona, Italy |
| 50.3 | Ordained Bishop | Ippolito Niccolai † | Bishop of Montepulciano, Italy |
| 4 Aug | | Born | José Ignacio Checa y Barba † | | Archbishop of Quito, Ecuador |
| 30.1 | Appointed | Leo Raymond de Neckère, C.M. † | Bishop of New Orleans, Louisiana, USA |
| 40.5 | Ceased | Joseph Rosati, C.M. † | Apostolic Administrator of New Orleans, Louisiana, USA | Bishop of Saint Louis, Missouri, USA |
| 25.1 | Ordained Priest | Gregor (Leonhard Andreas) von Scherr, O.S.B. † | Priest of Regensburg, Germany | Archbishop of München und Freising {Munich}, Germany |
| 5 Aug | 69.5 | Succeeded | Patrick MacMahon (McMahon) † | Bishop of Killaloe, Ireland |
| 84.5 | Died | James O’Shaughnessy † | Bishop of Killaloe, Ireland |
| 6 Aug | | Born | Eugenio Cano † | | Bishop Emeritus of Bosa, Italy |
| 7 Aug | | Born | Pedro José Cayetano de la Llosa, C.O. † | | Archbishop of La Plata o Charcas, Bolivia |
| 9 Aug | 54.4 | Ordained Bishop | José Talayero Royo, O.P. † | Bishop of Albarracin, Spain |
| 22.9 | Ordained Deacon | Ivan Josip Vitezić † | Deacon | Bishop of Krk (Veglia), Croatia |
| 11 Aug | 70.5 | Appointed | Aeneas Bernard MacEachern † | Bishop of Charlottetown, Prince Edward Island, Canada |
| 69.6 | Died | Giuseppe Perugini, O.E.S.A. † | Titular Bishop of Porphyreon |
| 13 Aug | 69.8 | Selected | Placido Maria Tadini, O.C.D. † | Bishop of Biella, Italy | Cardinal, Archbishop of Genova, Italy |
| 15 Aug | 51.8 | Ordained Bishop | Mariano Talavera y Garcés † | Titular Bishop of Tricca | Vicar Apostolic Emeritus of Guayana, Venezuela |
| 16 Aug | 30.6 | Ordained Bishop | [Yosyf (Józef) Semashko (Siemaszko)] † | Auxiliary Bishop of Polotsk (Połock)-Vitebsk (ROC), Belarus | Archbishop |
| 17 Aug | 42.9 | Appointed | Gabriel Henri Jérôme de Solages † | Prefect of Bourbon, Réunion |
| 82.2 | Died | Joaquín Javier Uriz Lasaga † | Bishop of Pamplona, Spain |
| 22 Aug | | Born | Raffaele Capone, C.Ss.R. † | | Bishop of Muro Lucano, Italy |
| 60.6 | Died | Ioannes Baptistus Russin † | Bishop Emeritus of Syros (e Milos), Greece |
| 23 Aug | 86.4 | Died | Johann Nepomuk von Wolf † | Bishop of Regensburg, Germany |
| 25 Aug | 74.0 | Resigned | Claude-Madeleine de La Myre-Mory † | Bishop of Le Mans, France | Bishop Emeritus |
| 28 Aug | | Born | Patrick Augustine Feehan † | | Archbishop of Chicago, Illinois, USA |
| 29 Aug | 68.2 | Selected | Antal Török † | Bishop of Csanád, Hungary |
| 30 Aug | 63.8 | Selected | Felipe González Abarca, O. de M. † | Bishop of Santander, Spain |