| Date | Age | Bishop | Title |
| unknown | | Pietro de Aretio, O.S.M. † | Bishop of Aversa, Italy |
| unknown | | Bertrand de Botinand † | Bishop of Tulle, France |
| unknown | | Nicholas Fleming † | Archbishop of Armagh, Ireland |
| unknown | | Federico Frezzi, O.P. † | Bishop of Foligno, Italy |
| unknown | | Sanche Mulier, O.P. † | Bishop of Oloron (Oloron-Sainte-Marie), France |
| unknown | | Pietro † | Bishop of Martirano (Martoranum), Italy |
| unknown | | Guglielmo Pusterla † | Bishop of Brescia, Italy |
| 13 Jan | | Nicolò de Carturis, O.F.M. † | Bishop of Trieste, Italy |
| Feb | | Giacomo da Treviso † | Bishop of Treviso, Italy |
| 25 Mar | | Martinho Perez de Charneca † | Archbishop of Braga, Portugal |
| 6 May | | Jean Arnaud, O.F.M. † | Bishop of Sarlat, France |
| 31 May | 56.4 | Arnold Stapel (Stapil), O.T. † | Bishop of Chelmno (Culma, Kulm), Poland |
| Jun | | Adam Lynns, O.P. † | Bishop of Ardagh (and Clonmacnois), Ireland |
| Jul | | Henrich von Schanenburg † | Bishop of Samland (Sambia), Poland |
| 1 Aug | | Arnaud de Peyrac † | Bishop of Lectoure, France |
| 27 Aug | | Jean d’Arconvalle † | Bishop of Chalons-sur-Saône, France |
| 6 Sep | 66.6 | Francesco Bembo † | Bishop of Castello, Italy |
| 6 Sep | | Hartmann von Werdenberg-Sargans † | Bishop of Chur, Switzerland |
| Oct | 66.7 | Bandello Bandelli † | Cardinal, Administrator of Rimini, Italy |
| 1 Oct | 66.7 | Stefan ze Lwowa † | Bishop Emeritus of Chełm, Poland |
| 15 Oct | | Gatien de Monceaux † | Bishop of Quimper, France |
| 16 Oct | | Thomas Snell † | Bishop of Ossory, Ireland |
| 21 Oct | | Peder Jensen Lodehat (Sielindi) † | Bishop of Roskilde (Roeskilde), Denmark |
| 22 Dec | | Robert Mascall, O. Carm. † | Bishop of Hereford, England, Great Britain |