| Date | Age | Bishop | Title |
| unknown | | Eugenio Cattaneo, B. † | Bishop of Telese o Cerreto Sannita, Italy |
| unknown | | Jérôme Centelles † | Bishop of Cavaillon, France |
| unknown | | Alexander Filaretus † | Bishop of Umbriatico (Umbriaticum), Italy |
| unknown | | Eugenio Fucci † | Bishop of Veroli, Italy |
| unknown | | Scipione Gesualdo † | Archbishop of Conza, Italy |
| unknown | | Francesco Liparuli (Liparolo) † | Bishop of Capri, Italy |
| unknown | | Fausto Malari (Molari, Mellari) † | Bishop of Chiusi, Italy |
| unknown | | Jorge de Padilla, O.P. † | Bishop of Città Ducale, Italy |
| unknown | | Jean de Tulles † | Bishop of Orange, France |
| unknown | 48.0 | Antonio Valente, O.P. † | Bishop of São Tomé e Príncipe |
| Jan | 37.0 | Fabrizio Perugini † | Bishop of Terracina, Priverno e Sezze, Italy |
| 19 Jan | 60.0 | Bernard Maciejowski † | Cardinal, Archbishop of Gniezno, Poland |
| 5 Feb | | Blasius Laubich † | Auxiliary Bishop of Passau, Germany |
| 8 Feb | 70.1 | Alphonse d’Elbène † | Bishop of Albi, France |
| Mar | | Youssef Rizzi el-Bkoufani † | Patriarch of Antiochia {Antioch} (Maronite), Lebanon |
| 27 Mar | 68.2 | Vicente Roca de la Serna † | Bishop of Albarracin, Spain |
| Apr | 60.3 | Antonio de Santo Estevão, O.P. † | Bishop of Angola e Congo, Angola |
| 18 Apr | 66.3 | Jakob Christoph Blarer von Wartensee † | Bishop of Basel, Switzerland |
| 25 Apr | | Jan von Sitsch † | Bishop of Wrocław (Breslau), Poland |
| 17 May | 48.1 | Ascanio Colonna † | Cardinal, Cardinal-Bishop of Palestrina |
| 8 Jun | 53.4 | Juan Bautista Acevedo Muñoz † | Bishop Emeritus of Valladolid, Spain |
| 9 Jun | 57.4 | Štefan Szuhay † | Archbishop of Kalocsa, Hungary |
| 11 Jun | 82.8 | François-Marie Tarugi, C.O. † | Cardinal, Archbishop Emeritus of Siena, Italy |
| 5 Jul | | Diego Haëdo † | Archbishop of Palermo, Italy |
| 14 Jul | | Pedro Brandão, O. Carm. † | Bishop of Santiago de Cabo Verde |
| Aug | 42.6 | Giacomo Candido † | Bishop of Lacedonia, Italy |
| Aug | | Modesto Gavazzi, O.F.M. Conv. † | Bishop of Alife, Italy |
| 2 Aug | 75.5 | Fernando Suárez Figueroa † | Bishop of Zamora, Spain |
| Sep | 54.7 | Giulio Calvi † | Bishop of Sora, Italy |
| Sep | 63.7 | Ilario Cortesi, C.R. † | Bishop of Policastro, Italy |
| 8 Sep | 62.7 | Jerónimo Xavierre, O.P. † | Cardinal, Priest of Order of Friars Preachers |
| 11 Sep | 38.0 | Alexandre de Bragança † | Archbishop of Évora, Portugal |
| 12 Sep | | Flaminio Filonardi † | Bishop of Aquino, Italy |
| 19 Sep | 56.7 | Alfonso Visconti, C.O. † | Cardinal, Bishop of Spoleto, Italy |
| 29 Sep | | Carlo Carafa † | Bishop of Boiano, Italy |
| 14 Oct | 64.8 | Pedro de Agurto, O.S.A. † | Bishop of Cebu, Philippines |
| 21 Oct | 47.8 | Valentin Mohr, O.S.B. † | Auxiliary Bishop of Mainz, Germany |
| 19 Nov | | Antonio Agelli, C.R. † | Bishop Emeritus of Acerno, Italy |
| 19 Nov | | Péter Radovich † | Bishop of Vác, Hungary |
| 24 Nov | | Giovanni Battista Giorgi, O.S.B. † | Bishop of Stagno (Ston), Croatia |
| 26 Nov | 64.3 | Luís de Figueiredo e Lemos † | Bishop of Funchal, Portugal |
| 27 Nov | | Nuno de Noronha † | Bishop of Guarda, Portugal |
| 4 Dec | | Tommaso Monti, C.R. † | Bishop of Crotone (Cotrone), Italy |