| Date | Age | Bishop | Title |
| unknown | 67.5 | Romualdu Massei † | Bishop of Nebbio, France |
| 14 Jan | 45.4 | Giuseppe Stanislao Concas † | Bishop of Bosa, Italy |
| 18 Jan | 54.7 | Girolamo Colonna di Sciarra † | Cardinal, Cardinal-Deacon of Sant’Agata de’ Goti |
| 19 Jan | | Antoine-Jérôme Boyvin de Vaurouy † | Former Bishop-Elect of Perpignan-Elne, France |
| 19 Jan | 76.6 | Antoni Józef Zolkowski † | Auxiliary Bishop of Vilnius, Lithuania |
| 27 Jan | 59.4 | Johann Theodor von Bayern † | Cardinal, Bishop of Regensburg, Germany |
| 29 Jan | 67.0 | Juan José de Eguiara y Eguren † | Former Bishop-Elect of Yucatán (Mérida), México |
| 31 Jan | | Felipe Manrique de Lara † | Bishop of Ayacucho o Huamanga (Guamanga), Peru |
| 26 Feb | 68.0 | Carolus Franciscus Casanova † | Archbishop of Sassari, Italy |
| 2 Mar | 53.2 | Baldassare Cenci (Jr.) † | Cardinal, Cardinal-Priest of Santa Maria in Ara Coeli |
| 18 Mar | 77.6 | Guido Orselli † | Bishop of Cesena, Italy |
| 21 Mar | 81.9 | Stanislao Poliastri † | Archbishop of Rossano, Italy |
| 4 Apr | 59.6 | Nicolás Gil Martínez y Malo † | Bishop of Santa Marta, Colombia |
| 11 Apr | | Richard Walsh † | Bishop of Cork, Ireland |
| 12 Apr | 69.2 | Giuseppe Spinelli † | Cardinal, Cardinal-Bishop of Ostia |
| 14 Apr | 64.0 | Francesco Paolo Carelli † | Bishop of Montepeloso, Italy |
| 4 Jun | 73.9 | Johann Friedrich Karl von Ostein † | Archbishop of Mainz, Germany |
| 4 Jun | 65.0 | Giovanni Domenico Santucci † | Bishop of Acquapendente, Italy |
| 11 Jun | 70.5 | Camillo Paolucci (Merlini) † | Cardinal, Cardinal-Bishop of Porto e Santa Rufina |
| 15 Jun | 65.2 | Giovanni Battista Miceli † | Bishop of Cassano all’Jonio, Italy |
| 15 Jun | 50.1 | Josef Maria von Thun und Hohenstein † | Bishop of Passau, Germany |
| 21 Jun | | Richard Lincoln † | Archbishop of Dublin, Ireland |
| 14 Jul | 71.5 | Francesco Pacca † | Archbishop of Benevento, Italy |
| 18 Jul | 64.5 | Pierre-Annet de Pérouse † | Bishop of Gap, France |
| 23 Aug | 76.4 | Charles-François Couton (Cantoni) † | Bishop of Nice, France |
| Sep | 72.4 | Massenzio dei Conti Filo † | Bishop of Castellaneta, Italy |
| 8 Sep | 83.3 | Nicolò Antonio Carafa, O.S.B. † | Bishop Emeritus of Tricarico, Italy |
| 12 Sep | 72.3 | Simon-Pierre de Lacoré (La Corée) † | Bishop of Saintes, France |
| 17 Sep | 81.6 | Antoni Sebastian Dembowski † | Bishop of Włocławek (Kujawy, Kalisze), Poland |
| 2 Oct | 65.9 | Claude-Antoine de Choiseul-Beaupré † | Bishop of Chalons-sur-Marne, France |
| 11 Oct | 74.8 | Pierre Louis Jacquet † | Auxiliary Bishop of Liège, Belgium |
| 16 Oct | 78.1 | Michele Vittorio Villa † | Bishop of Ivrea, Italy |
| 18 Oct | 69.1 | Giovanni Francesco Banchieri † | Cardinal, Cardinal-Priest of Sant’Adriano al Foro |
| 18 Oct | 68.5 | Ludovico Valenti † | Cardinal, Bishop of Rimini, Italy |
| 25 Oct | 61.5 | Domenico Rovegno † | Archbishop of Brindisi, Italy |
| 26 Oct | 87.4 | Johann Moritz Gustav von Manderscheid-Blankenheim † | Archbishop of Praha {Prague}, Czech Republic |
| 29 Oct | 81.2 | Nicolas François Bonhomme † | Titular Bishop of Carpasia |
| 2 Nov | 62.4 | Joseph-Nicolas Deschamps de Chaumont † | Bishop of Genève {Geneva}, Switzerland |
| 7 Nov | 76.9 | Ferdinando Romualdo Guiccioli † | Archbishop of Ravenna, Italy |
| 8 Nov | 73.3 | Henri-Constance de Lort de Sérignan de Valras † | Bishop of Mâcon, France |
| 20 Nov | 43.4 | Philipp Wirich Lorenz von Daun zu Sassenheim und Callenborn † | Auxiliary Bishop of Passau, Germany |
| 25 Nov | 50.9 | Giuseppe Locatelli † | Titular Archbishop of Cartagine |
| 28 Nov | 80.3 | Domingo Pantaleón Álvarez de Abreu † | Bishop of Tlaxcala, México |
| 29 Nov | 74.9 | Imrich I. Esterházy † | Bishop of Nitra, Slovakia |
| 9 Dec | 73.1 | Antonio Fonseca † | Bishop of Jesi, Italy |
| 11 Dec | 79.4 | Ramón Francisco Agustín Eura, O.S.A. † | Bishop of Orense, Spain |
| 23 Dec | 55.0 | Antoine de Lastic † | Bishop of Chalons-sur-Marne, France |
| 23 Dec | 76.8 | Costantino Serra, C.R.S. † | Bishop of Albenga, Italy |