| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Died | Gaetano Capece † | Archbishop of Trani, Italy |
| 38.0 | Succeeded | William Coppinger † | Bishop of Cloyne, Ireland |
| 38.0 | Succeeded | William Coppinger † | Bishop of Ross, Ireland | Bishop of Cloyne, Ireland |
| Born | Cornelius Denvir † | | Bishop Emeritus of Down and Connor, Ireland |
| Ordained Bishop | Marcelino José Da Silva † | Bishop of Macau, China | Bishop Emeritus |
| Appointed | José Ramón de Estrada y Orgas † | Bishop of Santa Cruz de la Sierra, Bolivia |
| 55.4 | Ordained Bishop | Bartolomé Fabro Palacios † | Bishop of Ayacucho o Huamanga, Peru |
| 25.2 | Ordained Priest | Felipe González Abarca, O. de M. † | Priest of Order of Our Lady of Mercy | Bishop of Santander, Spain |
| 61.9 | Died | Louis-Marie de Nicolay † | Bishop of Cahors, France |
| Died | Alejandro José de Ochoa y Morillo † | Bishop of Santa Cruz de la Sierra, Bolivia |
| Died | Gioacchino Paglione † | Bishop of Trivento, Italy |
| 24.8 | Ordained Priest | Alexander Paterson † | Priest | Vicar Apostolic of Eastern District, Scotland, Great Britain |
| Born | Tomás Miguel Pineda y Saldaña † | Guatemala | Bishop of San Salvador, El Salvador |
| 26.0 | Ordained Priest | Thomas Scallan, O.F.M. † | Priest of Order of Friars Minor | Vicar Apostolic of Newfoundland, Canada |
| Died | Andrea Torre † | Bishop of Minori, Italy |
| Appointed | Giovanni Battista Pio Vitale † | Bishop of Alba (Pompea), Italy | Bishop of Mondovi, Italy |
| 14 Jan | 56.0 | Died | José do Menino Jesus (Deus), O.C.D. † | Bishop of Viseu, Portugal |
| 30 Jan | 38.8 | Ordained Bishop | Ramón Falcón Salcedo † | Titular Bishop of Thaumacus | Bishop of Cuenca, Ecuador |
| 6 Feb | | Born | Frederick John Conrad Résé (Reze) † | Vienenberg, Germany | Bishop of Detroit, Michigan, USA |
| 10 Feb | 60.8 | Appointed | Sigismund Anton Graf von Hohenwart, S.J. † | Bishop of Trieste, Italy | Archbishop of Wien {Vienna}, Austria |
| 13 Feb | 45.9 | Ordained Bishop | Joseph Anton Blatter † | Bishop of Sion {Sitten}, Switzerland |
| 14 Feb | 50.6 | Appointed | Jean-François Périer † | Bishop of Foreign Diocese | Bishop of Avignon, France |
| Born | William Wareing † | London | Bishop Emeritus of Northampton, England, Great Britain |
| 16 Feb | 57.9 | Appointed | Jean-Pierre Saurine † | Bishop of Foreign Diocese | Bishop of Strasbourg, France |
| 22 Feb | 59.0 | Appointed | François Bécherel † | Bishop | Bishop of Valence, France |
| 24 Feb | | Born | Mariano Fernández Fortique † | Caracas | Bishop of Santo Tomás de Guayana, Venezuela |
| 27 Feb | 57.1 | Ordained Bishop | Stefan Wojciech von Łubieński † | Titular Bishop of Byblus | Auxiliary Bishop of Gniezno, Poland |
| 43.6 | Appointed | Claude-François-Marie Primat † | Bishop of Foreign Diocese | Archbishop of Toulouse, France |
| 58.0 | Ordained Bishop | Jean-Pierre Saurine † | Bishop of Foreign Diocese | Bishop of Strasbourg, France |
| 6 Mar | | Born | John MacHale † | Tubbernavine | Archbishop of Tuam, Ireland |
| 7 Mar | 50.2 | Appointed | Claude Le Coz † | Bishop of Foreign Diocese | Archbishop of Besançon, France |
| 9 Mar | | Born | Pietro Raffaelli † | Fosciandora | Bishop of Reggio Emilia, Italy |
| 10 Mar | | Born | Józef Grzegorz Wojtarowicz † | Szynwald | Bishop Emeritus of Tarnów, Poland |
| 17 Mar | 81.7 | Died | Augstín González Pisador † | Bishop of Oviedo, Spain |
| 19 Mar | 23.3 | Ordained Priest | Jean-Joseph-Pierre Guigou † | Priest | Bishop of Angoulême, France |
| 20 Mar | 59.0 | Ordained Bishop | François Bécherel † | Bishop | Bishop of Valence, France |
| 23 Mar | 52.8 | Appointed | Louis Charrier de La Roche † | Bishop of Foreign Diocese | Bishop of Versailles, France |
| 27 Mar | 50.8 | Ordained Bishop | Jean-François Périer † | Bishop of Foreign Diocese | Bishop of Avignon, France |
| Apr | 22.9 | Ordained Priest | Pierre-Marie Cottret † | Priest | Bishop of Beauvais, France |
| 9 Apr | 61.3 | Resigned | Manuel Abad Lasierra † | Bishop of Astorga, Spain | Bishop Emeritus |
| 10 Apr | 52.9 | Ordained Bishop | Louis Charrier de La Roche † | Bishop of Foreign Diocese | Bishop of Versailles, France |
| 50.3 | Ordained Bishop | Claude Le Coz † | Bishop of Foreign Diocese | Archbishop of Besançon, France |
| 43.7 | Ordained Bishop | Claude-François-Marie Primat † | Bishop of Foreign Diocese | Archbishop of Toulouse, France |
| 11 Apr | 59.6 | Appointed | Ignazio Busca † | Cardinal, Chamberlain (Camerlengo) of the College of Cardinals |
| 55.6 | Appointed | Bartolomé Fabro Palacios † | Bishop of Ayacucho o Huamanga, Peru |
| 36.7 | Appointed | Józef Arnulf Giedroyc † | Coadjutor Bishop of Samogizia o Tels (Zmudz), Lithuania | Bishop |
| 36.7 | Appointed | Józef Arnulf Giedroyc † | Titular Bishop of Orthosias in Caria | Bishop of Samogizia o Tels (Zmudz), Lithuania |
| 60.9 | Appointed | Francisco Isidoro Gutiérrez Vigil † | Bishop of Astorga, Spain |
| 55.7 | Appointed | Kajetan Maria (Ignaz Judas Thaddäus) Reisach, C.R. † | Titular Bishop of Dibon |
| 50.4 | Confirmed | Joseph Graf von Stubenberg † | Bishop of Eichstätt, Germany | Archbishop of Bamberg, Germany |
| 53.5 | Appointed | Antonio Tavira Almazán † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop of Salamanca, Spain |
| 13 Apr | 37.2 | Resigned | Charles-Maurice de Talleyrand-Périgord † | Bishop of Autun, France | Bishop Emeritus |
| 23 Apr | 24.1 | Ordained Priest | Giovanni Battista Iacobini † | Priest | Bishop of Bagnoregio (Bagnorea), Italy |
| 15 May | 55.8 | Ordained Bishop | Kajetan Maria (Ignaz Judas Thaddäus) Reisach, C.R. † | Titular Bishop of Dibon |
| 17 May | | Born | Richard Pius Miles, O.P. † | Prince George's County, MD | Bishop of Nashville, Tennessee, USA |
| 26 May | 72.7 | Died | Joseph Philipp Franz Reichsgraf von Spaur † | Bishop of Brixen {Bressanone}, Italy |
| 31 May | 43.0 | Resigned | Antonio Dugnani † | Apostolic Nuncio to France | Cardinal, Prefect of the Apostolic Signatura |
| 1 Jun | 87.2 | Died | José Javier Rodríguez Arellano † | Archbishop of Burgos, Spain |
| 2 Jun | | Born | Alexis-Basile-Alexandre Menjaud † | Chusclan | Archbishop of Bourges, France |
| 4 Jun | 85.4 | Died | Mathew McKenna † | Bishop of Ross, Ireland |
| 5 Jun | 23.7 | Ordained Priest | Candido Maria Frattini † | Priest of Roma {Rome}, Italy | Titular Archbishop of Philippi |
| 17 Jun | 68.3 | Died | Johann Georg Joseph von Eckart † | Auxiliary Bishop of Mainz, Germany |
| Born | Luigi Ricci † | Cupi | Bishop of Segni, Italy |
| 18 Jun | 23.0 | Ordained Priest | François-Antoine Arbaud † | Priest | Bishop of Gap, France |
| 24.3 | Ordained Priest | Tommaso Ronna † | Priest | Bishop of Crema, Italy |
| 24.0 | Ordained Priest | Gaetano Maria Giuseppe Benedetto Placido Vincenzo Trigona e Parisi † | Priest | Cardinal, Archbishop of Palermo, Italy |
| 19 Jun | 36.9 | Ordained Bishop | Józef Arnulf Giedroyc † | Titular Bishop of Orthosias in Caria | Bishop of Samogizia o Tels (Zmudz), Lithuania |
| 24.5 | Ordained Priest | Antoine Casimir Libère de Stockem † | Priest of Liège, Belgium | Auxiliary Bishop |
| 22 Jun | | Born | Thomas Griffiths † | London | Vicar Apostolic of London District, England, Great Britain |
| 25 Jun | 62.7 | Died | Antonio Feliú y Centena † | Bishop of Santiago de Cuba |
| 29 Jun | | Born | Ugo Pietro Spinola † | Genoa | Cardinal, Official of the Roman Curia - Other |
| 2 Jul | | Born | Carlo Vizzardelli † | Monte San Giovanni Campano | Cardinal, Cardinal-Priest of S. Pancrazio |
| 4 Jul | | Born | José Antonio Laureano de Zubiría y Escalante † | Arispe | Bishop of Durango, Durango, México |
| 16 Jul | | Born | Jean-Pierre Sola † | Carmagnole, Italy | Bishop Emeritus of Nice, France |
| 24 Jul | 61.2 | Ordained Bishop | Francisco Isidoro Gutiérrez Vigil † | Bishop of Astorga, Spain |
| 29 Jul | | Died | James Butler (2nd) † | Archbishop of Cashel (-Emly), Ireland |
| 7 Aug | 53.9 | Ordained Bishop | Antonio Tavira Almazán † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop of Salamanca, Spain |
| 11 Aug | | Born | Pierre Giraud † | Montferrand | Cardinal, Archbishop of Cambrai, France |
| 16 Aug | 42.7 | Appointed | Karl Franz von Lodron † | Bishop of Brixen {Bressanone}, Italy |
| 4 Sep | 36.3 | Appointed | Charles Montault des Isles † | Bishop of Foreign Diocese | Bishop of Angers, France |
| 9 Sep | 55.7 | Died | Alexander MacDonald † | Vicar Apostolic of Highland District, Scotland, Great Britain |
| Born | Jean-François Ollivier, M.E.P. † | Pleurtuit, France | Vicar Apostolic of Western Tonking {Tonkino Occidentale}, Viêt Nam |
| 11 Sep | 76.7 | Died | José Antonio Umeres de Miranda (Humeres) † | Bishop of Panamá |
| 12 Sep | 60.3 | Appointed | Franz Philipp Graf von Inzaghi † | Bishop of Gorizia e Gradisca, Italy |
| 20 Sep | | Born | Jan Kanty Dabrowski † | Umieczki | Auxiliary Bishop of Gniezno-Poznań, Poland |
| 24 Sep | 22.8 | Ordained Priest | Geraldo Maciioti † | Priest | Auxiliary Bishop of Ostia (-Velletri), Italy |
| 23.5 | Ordained Priest | Antônio Rodrigues de Aguiar † | Priest | Prelate of Goiás, Brazil |
| 26 Sep | 23.1 | Ordained Priest | Joseph Vitus Burg † | Priest of Konstanz {Constance}, Germany | Bishop of Mainz, Germany |
| 59.9 | Appointed | Carlo Luigi Buronzo del Signore † | Bishop of Novara, Italy | Archbishop of Torino {Turin}, Italy |
| 46.5 | Appointed | Antonio Despuig y Dameto † | Bishop of Orihuela, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |
| 66.0 | Appointed | Michal Mateusz Kosmowski † | Auxiliary Bishop of Gniezno, Poland |
| 66.0 | Appointed | Michal Mateusz Kosmowski † | Titular Bishop of Martyropolis | Auxiliary Bishop of Gniezno, Poland |
| 64.4 | Appointed | Juan Llano Ponte † | Bishop of Oviedo, Spain |
| 64.0 | Resigned | Etienne-Charles de Loménie de Brienne † | Cardinal-Priest | Cardinal, Archbishop of Sens, France |
| 47.0 | Elevated to Cardinal | Fabrizio Dionigi Ruffo † | In Pectore | Cardinal, Chamberlain Emeritus of the College of Cardinals |
| 61.4 | Confirmed | Sigismund Anton Graf von Hohenwart, S.J. † | Bishop of Trieste, Italy | Archbishop of Wien {Vienna}, Austria |
| 29 Sep | | Born | Antônio Joaquim de Mello † | Itú | Bishop of São Paulo, Brazil |
| 46.5 | Ordained Bishop | Antonio Despuig y Dameto † | Bishop of Orihuela, Spain | Cardinal, Archbishop Emeritus of Sevilla {Seville}, Spain |
| 1 Oct | | Born | Thomas Burgess † | Clayton Green | Bishop of Clifton, England, Great Britain |
| 19 Oct | | Born | Joseph William Hendren, O.F.M. † | Birmingham | Bishop Emeritus of Nottingham, England, Great Britain |
| 23 Oct | 36.5 | Ordained Bishop | Charles Montault des Isles † | Bishop of Foreign Diocese | Bishop of Angers, France |
| 61.5 | Ordained Bishop | Sigismund Anton Graf von Hohenwart, S.J. † | Bishop of Trieste, Italy | Archbishop of Wien {Vienna}, Austria |
| 26 Oct | | Ordained Bishop | Giovanni Battista Pio Vitale † | Bishop of Alba (Pompea), Italy | Bishop of Mondovi, Italy |
| 27 Oct | 78.1 | Died | Vicente da Gamal Leao † | Coadjutor Bishop Emeritus of São Sebastião do Rio de Janeiro, Brazil |
| 30 Oct | 24.8 | Ordained Priest | Alexande-Raymond Devie † | Priest of Valence, France | Bishop of Belley, France |
| 6 Nov | 66.1 | Ordained Bishop | Michal Mateusz Kosmowski † | Titular Bishop of Martyropolis | Auxiliary Bishop of Gniezno, Poland |
| 8 Nov | 78.2 | Died | Pierre Brigot, M.E.P. † | Vicar Apostolic of Verapoly, India |
| 57.6 | Succeeded | Nicolas Champenois, M.E.P. † | Vicar Apostolic of Verapoly, India |
| 39.7 | Appointed | John Chisholm † | Vicar Apostolic of Highland District, Scotland, Great Britain |
| 39.7 | Appointed | John Chisholm † | Titular Bishop of Oreus | Vicar Apostolic of Highland District, Scotland, Great Britain |
| 13 Nov | 51.0 | Ordained Bishop | Joseph Graf von Stubenberg † | Bishop of Eichstätt, Germany | Archbishop of Bamberg, Germany |
| 17 Dec | 43.4 | Appointed | Luiz de Brito Homem † | Bishop of Angola e Congo, Angola | Bishop of São Luís do Maranhão, Brazil |
| 23.1 | Ordained Priest | Pietro Fazzi † | Priest | Bishop of San Miniato, Italy |
| 52.6 | Appointed | Miguel da Madre de Deus da Cruz, O.F.M. † | Bishop of São Paulo, Brazil | Archbishop of Braga, Portugal |
| 19 Dec | 65.3 | Appointed | Francisco de Ibarra y Herrera † | Bishop of Santo Tomás de Guayana, Venezuela | Archbishop of Caracas, Santiago de Venezuela |
| 43.0 | Appointed | Andrés Ambrosio de Llanos y Valdés, O.F.M. † | Bishop of Linares o Nueva León, Nuevo León, México | Bishop of Chiapas (Ciudad Real de Chiapas), Chiapas, México |
| 53.8 | Appointed | Józef Kazimierz Kossakowski † | Coadjutor Bishop of Vilnius, Lithuania |
| 56.1 | Appointed | Cándido Manuel de Torrijos Riguerra, O.P. † | Bishop of Mérida, Venezuela |
| 67.5 | Appointed | Juan Antonio de los Tueros † | Archbishop of Burgos, Spain |
| 21 Dec | 23.4 | Ordained Priest | Joseph Maria Johann Nepomuk Freiherr von Fraunberg † | Priest of Regensburg, Germany | Archbishop of Bamberg, Germany |
| 26 Dec | 39.9 | Ordained Priest | Luigi Bottiglia Savoulx † | Priest | Cardinal, Prefect of the Apostolic Signatura |
| 27 Dec | 18.6 | Ordained Priest | Simón Rojas Guardiola y Hortoneda, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Urgell, Spain |