| Date | Age | Event | Bishop | Title | Current Title |
| unknown | | Died | Joseph Adjemian † | Bishop |
| Born | Abraham Kandilian (Candil) † | | Archbishop of Mardin (Armenian), Turkey |
| 31.5 | Selected | François-Joseph-Emmanuel de Crussol d’Uzès d’Amboise † | Bishop of La Rochelle, France |
| Appointed | Michel El-Khazen † | Titular Bishop of Caesarea in Palaestina |
| 27.0 | Appointed | Philippe Gemayel † | Coadjutor Bishop of Cyprus (Maronite) | Bishop |
| 27.0 | Appointed | Philippe Gemayel † | Titular Bishop of Lystra | Bishop of Cyprus (Maronite) |
| 22.2 | Ordained Priest | Michal Franciszek Karpowicz, C.M. † | Priest of Congregation of the Mission | Bishop of Wigry, Poland |
| Died | Melkon Markar Tahmanian † | Bishop of Mardin (Armenian), Turkey |
| 51.2 | Professed | Niccolò Oddi, S.J. † | Member of Society of Jesus | Cardinal, Archbishop of Ravenna, Italy |
| Resigned | Gilles-François Pinabel, C.S.Sp. † | Prefect of Iles Saint-Pierre et Miquelon | Prefect Emeritus |
| Jan | 69.3 | Died | Giovanni Antonio Borro † | Bishop of Bosa, Italy |
| 63.3 | Died | Hieronim Wieloglowski † | Auxiliary Bishop of Przemyśl, Poland |
| 1 Jan | | Born | Andrzej Benedykt Kłągiewicz † | | Bishop of Vilnius, Lithuania |
| Born | Antoine Casimir Libère de Stockem † | | Auxiliary Bishop of Liège, Belgium |
| 4 Jan | 57.2 | Died | Giuseppe Simonetti † | Cardinal, Cardinal-Priest of San Marcello |
| 47.1 | Ordained Bishop | Tadeusz Benedykt Feliks Towiański, O.F.M. Conv. † | Titular Bishop of Carpasia | Auxiliary Bishop of Vilnius, Lithuania |
| 9 Jan | 36.9 | Appointed | Cesare Alberico Lucini † | Apostolic Nuncio to Spain |
| 11 Jan | | Born | Pál Mátyás (Matija Pavao) Szutsits (Sučić) † | | Bishop of Bosna (Djakovo) et Srijem, Croatia |
| 42.9 | Ordained Deacon | Manuel Tavares Coutinho da Silva † | Deacon | Bishop of Portalegre, Portugal |
| 16 Jan | 39.0 | Selected | Antonio Stefano Trevisan † | Bishop of Scardona (Skradin), Croatia |
| 22 Jan | 64.9 | Died | Pedro Albornoz Tapia † | Bishop of Orihuela, Spain |
| 23 Jan | | Born | Alexandre-Raymond Devie † | | Bishop of Belley, France |
| 24 Jan | 40.8 | Appointed | François Pottier, M.E.P. † | Vicar Apostolic of Se-Ciuen (Setchoan, Szechwan, Sichuan), China |
| 40.8 | Appointed | François Pottier, M.E.P. † | Titular Bishop of Agathopolis | Vicar Apostolic of Se-Ciuen (Setchoan, Szechwan, Sichuan), China |
| 25 Jan | 23.5 | Ordained Priest | Pierre Denaut † | Priest of Québec, Canada | Bishop |
| 27 Jan | 82.3 | Died | Francisco Javier Sánchez Cabezón † | Bishop of Astorga, Spain |
| 29 Jan | 63.0 | Died | Jean-Joseph de Fogasses d’Entrechaux de La Bastie † | Bishop of Saint-Malo, France |
| 31 Jan | | Born | Jean-Joseph Delplancq † | | Bishop of Tournai {Doornik}, Belgium |
| 79.3 | Died | Charles-Louis de Froullay de Tessé † | Bishop of Le Mans, France |
| 53.6 | Appointed | Antonio Eugenio Visconti † | Apostolic Nuncio to Emperor | Cardinal, Prefect of the Congregation for Indulgences and Relics |
| Feb | 81.6 | Died | Agostino Giannini † | Bishop of Lettere (-Gragnano), Italy |
| 1 Feb | 54.8 | Died | Gabriele Maria (Giuseppe Pietro) di Blasi e Gambacorta, O.S.B. † | Archbishop of Messina, Italy |
| 82.5 | Died | Sante Veronese † | Cardinal, Bishop of Padova {Padua}, Italy |
| 2 Feb | 35.4 | Professed | Francesco Benincasa, S.J. † | Priest of Society of Jesus | Bishop of Carpi, Italy |
| 49.1 | Ordained Bishop | Andrzej Mikołaj Stanisław Kostka Młodziejewski † | Bishop of Przemyśl, Poland | Bishop of Poznań, Poland |
| 5 Feb | 52.0 | Resigned | Giovanni (Jan) Pettani † | Bishop of Šibenik (Knin), Croatia | Bishop Emeritus |
| 8 Feb | 43.0 | Ordained Priest | Manuel Tavares Coutinho da Silva † | Priest | Bishop of Portalegre, Portugal |
| 10 Feb | 46.1 | Appointed | Denis Maguire, O.F.M. Obs. † | Bishop of Dromore, Ireland | Bishop of Kilmore, Ireland |
| 11 Feb | 73.1 | Died | Jean-François Dondel † | Bishop of Dol, France |
| 14 Feb | | Born | Valery Henryk Kamionko † | | Auxiliary Bishop of Lviv, Ukraine |
| 52.1 | Appointed | Giovanni (Jan) Pettani † | Titular Bishop of Cisamus | Bishop Emeritus of Šibenik (Knin), Croatia |
| 16 Feb | 35.8 | Appointed | Ernest Johann Nepomuk von Herberstein (Herbstein) † | Auxiliary Bishop of Freising, Germany | Bishop of Linz, Austria |
| 35.8 | Appointed | Ernest Johann Nepomuk von Herberstein (Herbstein) † | Titular Bishop of Eucarpia | Bishop of Linz, Austria |
| 34.9 | Confirmed | Giulio (Giovanni Michele) Pignatelli, O.S.B. † | Archbishop of Otranto, Italy | Archbishop of Salerno, Italy |
| 39.3 | Confirmed | Jean-Marc de Royére † | Bishop of Tréguier, France | Bishop Emeritus of Castres, France |
| 54.1 | Appointed | Ignazio Andrea Sambiase, C.R. † | Bishop of Teramo, Italy | Archbishop of Conza, Italy |
| 44.7 | Appointed | Konstanty Leon Sosnowski, O.S.P.P.E. † | Auxiliary Bishop of Inflanty (Livonia)-Pilten, Poland | Auxiliary Bishop Emeritus |
| 44.7 | Appointed | Konstanty Leon Sosnowski, O.S.P.P.E. † | Titular Bishop of Arethusa | Auxiliary Bishop Emeritus of Inflanty (Livonia)-Pilten, Poland |
| 39.1 | Confirmed | Antonio Stefano Trevisan † | Bishop of Scardona (Skradin), Croatia |
| 22 Feb | 65.1 | Died | Nicolas de Bouillé de Saint-Géran † | Bishop of Autun, France |
| 54.3 | Ordained Bishop | Adam Joseph Ernest Bernclau von Schönreith † | Titular Bishop of Abila Lysaniae | Auxiliary Bishop of Regensburg, Germany |
| 58.7 | Ordained Bishop | Aldrago Antonio de Piccardi † | Bishop of Pedena, Austria | Bishop of Senj (-Modruš), Croatia |
| 24 Feb | 65.1 | Died | Manuel de Matos, O.F.M. Disc. † | Bishop of Nueva Caceres, Philippines |
| 34.9 | Ordained Bishop | Giulio (Giovanni Michele) Pignatelli, O.S.B. † | Archbishop of Otranto, Italy | Archbishop of Salerno, Italy |
| 54.1 | Ordained Bishop | Ignazio Andrea Sambiase, C.R. † | Bishop of Teramo, Italy | Archbishop of Conza, Italy |
| 1 Mar | 54.7 | Ordained Bishop | Miguel Fernando Merino † | Bishop of Ávila, Spain |
| 2 Mar | | Born | Tommaso Ronna † | | Bishop of Crema, Italy |
| 4 Mar | | Born | Giovanni Battista Iacobini † | | Bishop of Bagnoregio (Bagnorea), Italy |
| 7 Mar | 58.9 | Selected | Alberto Maria (Leonardo Antonio Pasquale) Capobianco, O.P. † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus |
| 8 Mar | 35.8 | Ordained Bishop | Ernest Johann Nepomuk von Herberstein (Herbstein) † | Titular Bishop of Eucarpia | Bishop of Linz, Austria |
| Born | Giuseppe Maria (Carlo) Velzi, O.P. † | | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 10 Mar | | Appointed | Giuseppe Roverani (Roverano) † | Vicar Apostolic of Constantinople, Turkey |
| Appointed | Giuseppe Roverani (Roverano) † | Titular Archbishop of Marcianopolis | Vicar Apostolic of Constantinople, Turkey |
| 11 Mar | 73.7 | Died | Vito Moio (Mojo) † | Bishop of Muro Lucano, Italy |
| 14 Mar | 24.1 | Ordained Priest | Giovanni Francesco d’Alessandria † | Priest | Bishop of Catanzaro, Italy |
| 22.2 | Ordained Deacon | Salvatore Maria Caccamo, O.E.S.A. † | Deacon of Order of Hermits of St. Augustine | Titular Archbishop of Larissa in Thessalia |
| 24.1 | Ordained Priest | Tymoteusz Pawel von Gorzeński † | Priest of Poznań, Poland | Archbishop of Gniezno e Poznań, Poland |
| 23.0 | Ordained Priest | Karl Josef Jerome von Kolborn † | Priest of Mainz, Germany | Auxiliary Bishop of Regensburg, Germany |
| 17 Mar | | Born | José Ignacio de Arancibia y Hormaguei, O.F.M. † | | Bishop of Linares o Nueva León, Nuevo León, México |
| 19 Mar | 45.6 | Ordained Priest | Bernardino Giraud † | Priest | Cardinal, Archbishop Emeritus of Ferrara, Italy |
| 20 Mar | 26.3 | Ordained Priest | Charles-François Bailly de Messein † | Priest of Québec, Canada | Coadjutor Bishop |
| Born | Juan Nepomuceno Gómez Durán † | | Bishop of Málaga, Spain |
| 24 Mar | 69.3 | Died | Antonio Andrea Galli, C.R.SS.S. † | Cardinal, Cardinal-Priest of San Pietro in Vincoli |
| 25 Mar | 23.0 | Ordained Priest | Francesco Milesi † | Priest | Patriarch of Venezia {Venice}, Italy |
| 30 Mar | 44.9 | Ordained Bishop | Konstanty Leon Sosnowski, O.S.P.P.E. † | Titular Bishop of Arethusa | Auxiliary Bishop Emeritus of Inflanty (Livonia)-Pilten, Poland |
| 4 Apr | 25.1 | Ordained Deacon | José de Santa Escolástica Álvares (Alves) Pereira, O.S.B. † | Deacon of Order of Saint Benedict | Archbishop of São Salvador da Bahia, Brazil |
| 22.9 | Ordained Priest | Bonaventura (Domenico Giuseppe) Gazzola, O.F.M. Ref. † | Priest of Order of Reformed Friars Minor | Cardinal, Bishop of Corneto (Tarquinia) e Montefiascone, Italy |
| 32.7 | Ordained Deacon | Antonio Cayetano Maciel Calheiros † | Deacon | Auxiliary Bishop of Lisboa {Lisbon}, Portugal |
| 24.2 | Ordained Priest | Jean-Didier de Saint Martin, M.E.P. † | Priest | Vicar Apostolic of Se-Ciuen (Setchoan, Szechwan, Sichuan), China |
| 6 Apr | 56.1 | Installed | Antonio Branciforte Colonna † | Cardinal-Priest of Santa Maria in Via | Cardinal, Bishop of Agrigento (Girgenti), Italy |
| 59.0 | Confirmed | Alberto Maria (Leonardo Antonio Pasquale) Capobianco, O.P. † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus |
| 39.8 | Appointed | Marco Giuseppe Cornaro (Corner) † | Bishop of Vicenza, Italy |
| 38.2 | Confirmed | Joseph VI Estephan † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 58.6 | Appointed | Gaetano Fantuzzi † | Cardinal, Cardinal-Priest of San Pietro in Vincoli |
| 45.7 | Appointed | Bernardino Giraud † | Titular Archbishop of Damascus | Cardinal, Archbishop Emeritus of Ferrara, Italy |
| 58.2 | Resigned | Gioacchino Maria Pontalti, O. Carm. † | Bishop of Hvar (Lesina), Croatia | Bishop Emeritus |
| 59.6 | Appointed | Antonio Maria Priuli † | Cardinal, Bishop of Padova {Padua}, Italy |
| 48.6 | Appointed | Nicola Pugliesi † | Archbishop of Dubrovnik (Ragusa), Croatia | Archbishop Emeritus |
| 7 Apr | | Born | Giovanni Francesco Falzacappa † | | Cardinal, Prefect of the Apostolic Signatura |
| Born | Konstanty Wincenty Plejewski † | | Auxiliary Bishop of Płock, Poland |
| 9 Apr | 26.5 | Ordained Priest | Marc-Antoine Berdolet † | Priest of Besançon, France | Bishop of Aachen, Germany |
| Born | Salvator Ferro de Berardis † | | Bishop of Catania, Italy |
| 12 Apr | 59.0 | Ordained Bishop | Alberto Maria (Leonardo Antonio Pasquale) Capobianco, O.P. † | Archbishop of Reggio Calabria, Italy | Archbishop Emeritus |
| 13 Apr | 58.2 | Appointed | Gioacchino Maria Pontalti, O. Carm. † | Titular Bishop of Ascalon | Bishop Emeritus of Hvar (Lesina), Croatia |
| 14 Apr | 37.2 | Resigned | Cesare Alberico Lucini † | Apostolic Nuncio to Germany | Apostolic Nuncio to Spain |
| 22.1 | Ordained Deacon | Johannes Antonius de Ricci † | Deacon of Ljubljana (Laybach; Laibach), Slovenia | Auxiliary Bishop of Ljubljana, Slovenia |
| 76.1 | Died | Giuseppe Saporiti † | Archbishop of Genova, Italy |
| 19 Apr | 54.1 | Appointed | Antoine-Joseph des Laurents † | Bishop of Saint-Malo, France |
| 30.3 | Selected | Louis-André de Grimaldi † | Bishop of Le Mans, France | Bishop of Noyon, France |
| 41.2 | Selected | Urbain-René de Hercé † | Bishop of Dol, France |
| 45.9 | Selected | Pierre-Louis de Leyssin † | Archbishop of Embrun, France |
| 32.9 | Selected | Yves-Alexandre de Marbeuf † | Bishop of Autun, France | Archbishop of Lyon, France |
| 21 Apr | 25.1 | Ordained Priest | José de Santa Escolástica Álvares (Alves) Pereira, O.S.B. † | Priest of Order of Saint Benedict | Archbishop of São Salvador da Bahia, Brazil |
| 68.4 | Died | Sándor Fonyó † | Priest |
| 23.2 | Ordained Deacon | Jan Chryzostom Kaczkowski † | Deacon | Auxiliary Bishop of Lutsk and Zhytomyr (Łuck and Zytomierz), Ukraine |
| 23 Apr | 42.7 | Resigned | Bernardino Honorati † | Apostolic Nuncio to Florence (Tuscany), Italy | Cardinal, Bishop of Senigallia, Italy |
| 26 Apr | 45.7 | Ordained Bishop | Bernardino Giraud † | Titular Archbishop of Damascus | Cardinal, Archbishop Emeritus of Ferrara, Italy |
| 23.2 | Ordained Priest | Jan Chryzostom Kaczkowski † | Priest | Auxiliary Bishop of Lutsk and Zhytomyr (Łuck and Zytomierz), Ukraine |
| 39.5 | Ordained Bishop | Jean-Marc de Royére † | Bishop of Tréguier, France | Bishop Emeritus of Castres, France |
| 27 Apr | 59.3 | Appointed | Miguel Cilieza y Velasco † | Bishop of Chiapas (Ciudad Real de Chiapas), México |
| 50.0 | Appointed | Antonio Jorge y Galván † | Bishop of Zamora, Spain | Archbishop of Granada, Spain |
| Born | Camillo Giovanni Rossi † | | Bishop Emeritus of San Severo, Italy |
| 28 Apr | 62.3 | Appointed | Julien-François Becquet, C.S.Sp. † | Prefect of Iles Saint-Pierre et Miquelon | Prefect Emeritus |
| 30 Apr | 33.3 | Appointed | Gjergj Engjëll Radovani † | Vicar Apostolic of Sofia e Plovdiv, Bulgaria | Archbishop of Bar (Antivari), Montenegro |
| 3 May | 46.3 | Ordained Bishop | Denis Maguire, O.F.M. Obs. † | Bishop of Dromore, Ireland | Bishop of Kilmore, Ireland |
| 6 May | | Born | Pierre-Michel-Marie Double † | | Bishop of Tarbes, France |
| 16 May | | Born | Michele Lanzetta † | | Bishop of Lacedonia, Italy |
| 25 May | 62.3 | Resigned | Bernardin-Louis Foucquet † | Archbishop of Embrun, France | Archbishop Emeritus |
| 51.6 | Died | Niccolò Oddi, S.J. † | Cardinal, Archbishop of Ravenna, Italy |
| 26 May | 51.6 | Died | Gennaro Maria Albertini, C.R. † | Bishop of Caserta, Italy |
| 28 May | | Born | Augustin-Louis de Montblanc † | | Archbishop of Tours, France |
| 1 Jun | 54.2 | Appointed | Sebastiano Canepa † | Bishop of Nicopoli, Bulgaria |
| 51.9 | Appointed | Nicolaus Difnico † | Bishop of Šibenik (Knin), Croatia |
| 56.9 | Appointed | Juan Manuel Merino y Lumbreras † | Bishop of Astorga, Spain |
| 45.3 | Appointed | Krysztof Hilary Szembek † | Titular Bishop of Verinopolis | Bishop of Płock, Poland |
| 45.3 | Confirmed | Krysztof Hilary Szembek † | Coadjutor Bishop of Chelmno (Culma, Kulm), Poland | Bishop of Płock, Poland |
| 45.4 | Appointed | José Tormo Juliá † | Bishop of Orihuela, Spain |
| 2 Jun | | Born | Gaetano Maria Giuseppe Benedetto Placido Vincenzo Trigona e Parisi † | | Cardinal, Archbishop of Palermo, Italy |
| 7 Jun | 51.9 | Ordained Bishop | Nicolaus Difnico † | Bishop of Šibenik (Knin), Croatia |
| 8 Jun | 36.9 | Ordained Priest | Johann Nepomuk Augustin von Hornstein zu Hohenstoffen † | Priest of Konstanz {Constance}, Germany | Auxiliary Bishop Emeritus |
| 78.5 | Died | Andreas Venditti (Vinditti) † | Bishop of Polignano (Polinianum), Italy |
| 12 Jun | 40.2 | Selected | Giovanni Nani † | Bishop of Torcello (Turris), Italy | Bishop of Brescia, Italy |
| 13 Jun | 22.9 | Ordained Priest | Andrzej Chołoniewski † | Priest | Auxiliary Bishop of Vilnius, Lithuania |
| 29.5 | Ordained Priest | Charles-Joseph Compans de Brichanteau † | Priest | Bishop of Saint-Jean-de-Maurienne, France |
| 29.3 | Ordained Priest | Tiburzio Cortese † | Priest | Bishop of Modena, Italy |
| 23.1 | Ordained Priest | Vicente Alexandre de Tovar † | Priest | Prelate of Goiás, Brazil |
| 15 Jun | 30.4 | Confirmed | Louis-André de Grimaldi † | Bishop of Le Mans, France | Bishop of Noyon, France |
| 41.3 | Confirmed | Urbain-René de Hercé † | Bishop of Dol, France |
| 46.1 | Confirmed | Pierre-Louis de Leyssin † | Archbishop of Embrun, France |
| 33.0 | Confirmed | Yves-Alexandre de Marbeuf † | Bishop of Autun, France | Archbishop of Lyon, France |
| 52.3 | Installed | Urbano Paracciani Rutili † | Cardinal-Priest of San Callisto | Cardinal, Archbishop of Fermo, Italy |
| 17 Jun | 17.1 | Professed | Adrijan Holovnja (Hołownia), O.S.B.M. † | Member of Basilian Order of Saint Josaphat (Order of St. Basil the Great) | Auxiliary Bishop of Žyrovyci (Ukrainian), Lithuania |
| 66.5 | Died | Marcin Załuski † | Auxiliary Bishop Emeritus of Płock, Poland |
| 20 Jun | | Born | Giuseppe Vincenzo Airenti, O.P. † | | Archbishop of Genova, Italy |
| 63.6 | Died | Władysław Aleksander Łubieński † | Archbishop of Gniezno, Poland |
| 24 Jun | 48.2 | Selected | Gabriel Jan Podoski † | Archbishop of Gniezno, Poland |
| 27 Jun | 45.9 | Appointed | Bernardino Giraud † | Apostolic Nuncio to France | Cardinal, Archbishop Emeritus of Ferrara, Italy |