| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Born | Manuel Abad y Queipo † | Asturias, Spain | Former Bishop-Elect of Michoacán, México |
| 31.8 | Ordained Priest | Iovinus Fridericus Bystrzycki † | Priest | Auxiliary Bishop-Elect of Warszawa {Warsaw}, Poland |
| Born | Bartholomew Crotty † | Clonakilty | Bishop of Ross, Ireland |
| 24.4 | Ordained Priest | Ignacy Houwalt † | Priest | Auxiliary Bishop-Elect of Vilnius, Lithuania |
| 22.5 | Ordained Priest | Jean-Siffrein Maury † | Priest | Cardinal, Bishop Emeritus of Corneto (Tarquinia) e Montefiascone, Italy |
| Born | Giovanni Battista Russin † | Tinos | Bishop Emeritus of Syros (e Milos), Greece |
| Born | Kyrylo Syrotynskyj † | | Bishop of Pińsk-Turow (Ukrainian), Belarus |
| 63.5 | Died | Fridericus von Pfutschner † | Auxiliary Bishop of Győr (Raab), Hungary |
| Jan | 48.1 | Died | José Luis de Lila y Moreno, O.S.A. † | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 53.3 | Died | Erasmo Mastrilli, O.S.B. † | Bishop of Isernia, Italy |
| 11 Jan | 70.9 | Died | Franjo Thauszy † | Bishop of Zagreb (Agram), Croatia |
| 18 Jan | 57.2 | Selected | Anton Ignaz von Fugger-Glött † | Bishop of Regensburg, Germany |
| 23 Jan | 41.7 | Selected | Ludwig Joseph von Welden auf Laubheim und Hohenaltingen † | Bishop of Freising, Germany |
| 25 Jan | 81.6 | Died | Francesco Trevisan Suarez † | Bishop of Caorle, Italy |
| 26 Jan | | Born | Niccola Kováts de Csil-Tusnad † | Tusnád | Bishop of Transilvania, Erdély, Siebenbürgen, Romania |
| 29 Jan | | Born | Joachin (Gioacchino Domenico) Salvetti, O.F.M. † | Bagno di Casciano, Italy | Vicar Apostolic of Shansi {Scian-Si} (Chan-Si), China |
| 31 Jan | | Born | Epiphanius Maria Turrisi † | Tusa | Titular Bishop of Flavias |
| Feb | 55.9 | Died | Sebastiano Canepa † | Bishop of Nicopoli, Bulgaria |
| 2 Feb | 33.6 | Ordained Priest | Andrea Corsini † | Priest | Cardinal, Cardinal-Bishop of Sabina |
| 75.9 | Died | Carlo della Torre Rezzonico † | Pope (Roma {Rome}, Italy) |
| 3 Feb | 70.3 | Died | Domenico Andrea Calvaccante (Cavalcante), C.R. † | Archbishop of Trani, Italy |
| 54.8 | Died | Diego Antonio Díez Madroñero † | Bishop of Caracas, Santiago de Venezuela |
| 5 Feb | 57.5 | Died | Giacomo Leto † | Archbishop of Lanciano, Italy |
| 12 Feb | 61.4 | Died | Francesco Piazza † | Bishop of Forli, Italy |
| 18 Feb | 24.0 | Ordained Priest | Francesco Saverio Bassi, O.S.B. † | Priest of Order of Saint Benedict | Archbishop of Chieti, Italy |
| 23.9 | Ordained Priest | Joseph Anton Blatter † | Priest of Sion {Sitten}, Switzerland | Bishop |
| 24.2 | Ordained Priest | Manuel Joaquim Da Silva † | Priest | Titular Archbishop of Hadrianopolis in Haemimonto |
| 56.3 | Died | Pierre de La Romagère de Ronssecy † | Bishop of Tarbes, France |
| 19 Feb | 74.7 | Died | Franciscus Antonius de los Reyes † | Bishop of Oria, Italy |
| 77.6 | Died | Bartolomé Rull, O.S.Io.Hieros. † | Bishop of Malta |
| 20 Feb | | Born | Michael Angelo Buono † | Napoli, Italy | Titular Bishop of Derbe |
| 23 Feb | 67.3 | Died | Francisco Galindo Sanz, O.M. † | Bishop of Orense, Spain |
| 26 Feb | 54.7 | Ordained Bishop | Vladislaus Joannes Walknowski † | Titular Bishop of Benda | Auxiliary Bishop of Poznań, Poland |
| 28 Feb | 63.2 | Died | Jean de Bonneguise † | Bishop of Arras, France |
| 5 Mar | 54.1 | Ordained Bishop | Scipione Ardoino Alcontres, C.R. † | Titular Bishop of Zenopolis in Lycia | Archbishop of Messina, Italy |
| 8 Mar | | Born | Francisco Pablo Vásquez Bizcaíno (y Sánchez) † | Atlixco | Bishop of Tlaxcala, México |
| 10 Mar | | Born | Salvatore de Luca † | Napoli | Archbishop of Rossano, Italy |
| 13 Mar | 68.2 | Died | John O’Brien † | Bishop of Cloyne, Ireland | Bishop of Ross, Ireland |
| 22 Mar | 66.5 | Died | Michal Witosławski † | Auxiliary Bishop of Przemyśl, Poland |
| 23 Mar | 22.3 | Ordained Priest | Giacomo Boschi † | Priest | Bishop of Carpi, Italy |
| 24 Mar | | Born | José Maria de Araújo, O.S.H. † | Porto | Bishop of Olinda, Brazil |
| 25 Mar | 23.1 | Ordained Priest | Giovanni Gaetano del Muscio † | Priest | Archbishop of Manfredonia, Italy |
| 25.9 | Ordained Priest | Onufry Kajetan Szembek † | Priest | Bishop of Płock, Poland |
| 1 Apr | | Born | Julius Benzo † | Palermo | Auxiliary Bishop of Mazara del Vallo, Italy |
| 2 Apr | | Born | Giacinto Placido Zurla, O.S.B. † | Legnano, Italy | Cardinal, Prefect of the Congregation for Studies |
| 5 Apr | | Born | Claude-Hippolyte Clausel de Montals † | Coussergues | Bishop Emeritus of Chartres, France |
| 8 Apr | | Born | Dionisio Castaño y Bermúdez † | Novés | Bishop of Gerona, Spain |
| 14 Apr | 61.3 | Died | Johann Friedrich von Lasser † | Auxiliary Bishop of Mainz, Germany |
| 15 Apr | | Born | Carlo Oppizzoni (Opizoni) † | Milano | Cardinal, Archbishop Emeritus of Bologna, Italy |
| 16 Apr | 22.5 | Ordained Deacon | Franciszek Remigiusz Zambrzycki † | Deacon | Auxiliary Bishop of Kyiv and Chernihiv (Kijów and Czernihow), Ukraine |
| 18 Apr | | Born | Manuel Santo Galdino, O.F.M. † | Lisboa, Portugal | Archbishop of Goa, India |
| 19 Apr | | Born | Anselmo Basilici † | Canemorto | Bishop of Nepi e Sutri, Italy |
| 7 May | 30.1 | Ordained Deacon | Wojciech Górski † | Deacon | Bishop of Kielce, Poland |
| 9 May | | Born | Gregorio Rodríguez Carrillo, O.S.Bas. † | Villanueva del Ariscal, Spain | Bishop of Cartagena, Colombia |
| 14 May | 30.1 | Ordained Priest | Wojciech Górski † | Priest | Bishop of Kielce, Poland |
| 19 May | 63.6 | Elected | Lorenzo (Giovanni Vincenzo Antonio) Ganganelli, O.F.M. Conv. † | Pope (Roma {Rome}, Italy) |
| 49.6 | Appointed | Lazzaro Opiziio Pallavicino † | Cardinal, Secretary of the Secretariat of State |
| 20 May | 24.1 | Ordained Priest | Sylvestre a Maria Santissima (Santa Maria), O.F.M. † | Priest of Order of Friars Minor | Bishop of Santiago de Cabo Verde |
| 21 May | 39.7 | Ordained Bishop | George Hay † | Titular Bishop of Daulia | Vicar Apostolic Emeritus of Lowland District, Scotland, Great Britain |
| 23 May | 79.1 | Died | Christoph Nebel † | Auxiliary Bishop of Mainz, Germany |
| 28 May | 63.6 | Ordained Bishop | Lorenzo (Giovanni Vincenzo Antonio) Ganganelli, O.F.M. Conv. † | Pope (Roma {Rome}, Italy) |
| 6 Jun | 23.5 | Ordained Priest | Matthäus Georg von Chandelle † | Priest of Mainz, Germany | Bishop of Speyer, Germany |
| 7 Jun | 31.3 | Ordained Priest | Teodozy Wislocki, O.S.B.M. † | Priest of Basilian Order of Saint Josaphat (Order of St. Basil the Great) | Bishop of Suprasl (Ukrainian), Belarus |
| 9 Jun | 63.6 | Installed | Lorenzo (Giovanni Vincenzo Antonio) Ganganelli, O.F.M. Conv. † | Pope (Roma {Rome}, Italy) |
| 10 Jun | | Born | László Esterházy † | Sopron, Hungary | Bishop of Rožňava, Slovakia |
| 12 Jun | 63.7 | Appointed | Giuseppe Boccarelli † | Bishop of Termoli, Italy |
| 61.9 | Appointed | Juan Bautista Cervera, O.F.M. † | Bishop of Islas Canarias {Canary Islands}, Spain | Bishop of Cádiz, Spain |
| 57.6 | Confirmed | Anton Ignaz von Fugger-Glött † | Bishop of Regensburg, Germany |
| 37.6 | Appointed | Franciscus Kornis de Goncz-Ruszka † | Auxiliary Bishop of Győr (Raab), Hungary |
| 37.6 | Appointed | Franciscus Kornis de Goncz-Ruszka † | Titular Bishop of Iuliopolis | Auxiliary Bishop of Győr (Raab), Hungary |
| 47.6 | Appointed | Marcantonio Marcolini † | Titular Archbishop of Thessalonica | Cardinal, Cardinal-Priest of Sant’Onofrio |
| 42.1 | Confirmed | Ludwig Joseph von Welden auf Laubheim und Hohenaltingen † | Bishop of Freising, Germany |
| 16 Jun | | Born | Antonio Savorin † | Torreglia | Bishop of Chioggia, Italy |
| 18 Jun | 63.7 | Ordained Bishop | Giuseppe Boccarelli † | Bishop of Termoli, Italy |
| 42.4 | Selected | Michel-François de Couët du Vivier de Lorry † | Bishop of Tarbes, France | Bishop Emeritus of La Rochelle, France |
| 31.2 | Selected | Joachim-François-Mamert de Conzié † | Bishop of Saint-Omer, France | Archbishop of Tours, France |
| 23.4 | Ordained Priest | Riccardo Capece Minutolo, O.S.B. † | Priest of Order of Saint Benedict | Bishop of Gaeta, Italy |
| 23.0 | Ordained Priest | Salvatore Spinelli, O.S.B. † | Priest of Order of Saint Benedict | Archbishop of Salerno, Italy |
| 22 Jun | | Born | Pablo Hernández, O.SS.T. † | Madrid | Bishop of Ceuta, Spain |
| 24 Jun | | Born | Domenico Armellini † | Rome | Bishop of Terni, Italy |
| 25 Jun | 76.4 | Died | Carlo Francesco Durini † | Cardinal, Bishop of Pavia, Italy |
| 47.6 | Ordained Bishop | Marcantonio Marcolini † | Titular Archbishop of Thessalonica | Cardinal, Cardinal-Priest of Sant’Onofrio |
| 26 Jun | 45.3 | Installed | Buenaventura Córdoba Espinosa de la Cerda † | Cardinal-Priest of San Lorenzo in Panisperna | Cardinal, Patriarch of West Indies, Spain |
| 64.2 | Installed | Giovanni Molino † | Cardinal-Priest of San Sisto | Cardinal, Bishop of Brescia, Italy |
| 54.1 | Appointed | François-Joachim de Pierres de Bernis † | Cardinal-Priest of San Silvestro in Capite | Cardinal, Archbishop of Albi, France |
| 56.4 | Installed | Francisco de Solís Folch de Cardona † | Cardinal-Priest of Santi XII Apostoli | Cardinal, Archbishop of Sevilla {Seville}, Spain |
| 27 Jun | 73.9 | Died | Domenico de Amato † | Bishop of Castro di Puglia, Italy |
| 28 Jun | 70.9 | Died | Jean Antoine de Robiano † | Bishop of Roermond, Netherlands |
| 29 Jun | 23.1 | Ordained Priest | Girolamo Luigi Crivelli † | Priest | Bishop of Nepi e Sutri, Italy |