| Date | Age | Bishop | Title |
| unknown | 80.0 | Pál Bornemissza † | Bishop of Nitra, Slovakia |
| unknown | 66.0 | Pietro Antonio Di Capua † | Archbishop of Otranto, Italy |
| unknown | | Antonius Lucurri (Cogorno), O.P. † | Bishop Emeritus of Brugnato, Italy |
| unknown | | Antonio Bargaeus de Angelis † | Bishop of Massa Marittima, Italy |
| unknown | | Giovanni Ludovico da Campania † | Bishop of Mottola (Motula), Italy |
| unknown | | Vincenzo Ferreri † | Bishop of Umbriatico (Umbriaticum), Italy |
| unknown | | Agostino Folignatti (Molignatus) † | Bishop of Bertinoro, Italy |
| unknown | | Gregorio Forbicini † | Bishop of Strongoli, Italy |
| unknown | 71.0 | Jean de Montluc † | Bishop Emeritus of Valence and Die, France |
| unknown | | Odo Hugh O’Sheridan (Ogendriamus) † | Bishop of Kilmore, Ireland |
| unknown | | Robert de Pellevé † | Bishop of Pamiers, France |
| unknown | 74.0 | Walerian Protosewicz † | Bishop of Vilnius, Lithuania |
| 18 Jan | | Jorge de Santa Luzia, O.P. † | Bishop of Malacca, Singapore |
| 19 Mar | | Bertrando de Romanis † | Bishop of Fréjus, France |
| 26 Mar | 69.2 | Christoph von Lamberg † | Bishop Emeritus of Seckau, Austria |
| 8 Apr | | Orazio Montegranelli † | Bishop of Fossombrone, Italy |
| 29 Apr | 54.4 | Diego de Landa, O.F.M. † | Bishop of Yucatán (Mérida), México |
| 4 Jun | 53.4 | Edmund Tanner † | Bishop of Cork and Cloyne, Ireland |
| 8 Jun | | Romolo de Valenti † | Bishop of Conversano, Italy |
| 22 Jun | 43.4 | David Kölderer von Burgstall † | Bishop of Regensburg, Germany |
| 19 Jul | | Baltazar Radlič † | Bishop-Elect of Ljubljana (Laybach; Laibach), Slovenia |
| 23 Jul | | Bernardo de Albuquerque, O.P. † | Bishop of Antequera, Oaxaca, México |
| 24 Jul | 62.5 | Benedetto Lomellini † | Cardinal, Bishop of Anagni, Italy |
| 26 Jul | | Alessandro Ruffino † | Bishop of Melfi e Rapolla, Italy |
| 27 Jul | | Pietro Camaiani † | Bishop of Ascoli Piceno, Italy |
| 5 Aug | 75.2 | Stanislaw Hosius (Hozjusz) † | Cardinal, Bishop of Warmia (Ermland), Poland |
| 12 Aug | 65.5 | Domenico Bollani † | Bishop of Brescia, Italy |
| 13 Aug | | Bl. Patrick O’Healy, O.F.M. Obs. † | Bishop of Mayo, Ireland |
| 14 Aug | 58.6 | Ghislain de Vroede † | Auxiliary Bishop of Mechelen, Belgium |
| 23 Aug | | Miguel Jerónimo Morell † | Bishop of Urgell, Spain |
| 23 Aug | 71.6 | Francisco Pacheco de Toledo (Villena) † | Cardinal, Archbishop of Burgos, Spain |
| 11 Sep | | Pomponio Cotta † | Bishop of Novara, Italy |
| 13 Sep | | Diego Deza Tello † | Bishop of Jaén, Spain |
| 20 Sep | | Gonzalo Herrera Olivares † | Auxiliary Bishop of Burgos, Spain |
| 25 Sep | 70.5 | Gregorio Antonio Gallo de Andrade † | Bishop of Segovia, Spain |
| Nov | | Giovanni Luigi Guarini † | Bishop of Aquino, Italy |
| 8 Nov | 80.8 | Tristan de Bizet, O.S.B. † | Bishop Emeritus of Saintes, France |
| 8 Dec | 63.9 | Girolamo Federici † | Bishop of Lodi, Italy |