| Date of Death | Deceased Bishops (68) |
| 1918.01.05 | |
| 1918.01.13 | |
| 1918.01.18 | Bishop of Argyll and The Isles (Scotland) (1892.12.31 – 1918.01.18) |
| 1918.01.21 | Metropolitan of Făgăraş şi Alba Iulia of the Romanians (Romania) (1895.03.18 – 1918.01.21) |
| 1918.01.21 | |
| 1918.01.23 | |
| 1918.01.23 | |
| 1918.02.17 | |
| 1918.02.27 | Metropolitan Archbishop of Philadelphia (USA) (1911.05.27 – 1918.02.27) |
| 1918.03.04 | Vicar Apostolic emeritus of Macedonia of the Bulgarians (Greece) (1883.06.12 – 1895.07.23) |
| 1918.03.05 | Cardinal-Priest of S. Cecilia (1914.05.28 – 1918.03.05) Archbishop emeritus of Spoleto (Italy) (1900.04.19 – 1912.03.02) Prefect of Sacred Congregation of the Propagation of the Faith (1916.03.24 – 1918.03.05) |
| 1918.03.06 | Vicar Apostolic emeritus of Central Madagascar (Madagascar) (1885.05.05 – 1911.08.30) |
| 1918.03.17 | Bishop emeritus of Massa Carrara (Italy) (1894.05.18 – 1909.04.29) |
| 1918.03.18 | Metropolitan Archbishop of Albi (France) ([1899.12.07] 1899.12.14 – 1918.03.18) |
| 1918.03.19 | Metropolitan Archbishop of Tuam (Ireland) (1903.02.13 – 1918.03.19) |
| 1918.03.24 | Auxiliary Bishop emeritus of Lviv (Ukraine) (1895.12.02 – 1906.05.26) |
| 1918.03.30 | |
| 1918.04.05 | Auxiliary Bishop of Praha (Czechia) (1908.05.01 – 1918.04.05) |
| 1918.04.21 | Vicar Apostolic of Fernando Poo (Equatorial Guinea) (1904.05.12 – 1918.04.21) |
| 1918.04.22 | Auxiliary Bishop of Tuam (Ireland) (1912.03.23 – 1918.04.22) |
| 1918.04.24 | |
| 1918.04.24 | Vicar Apostolic of Southern Shaanxi 陝西南境 (China) (1895.03.29 – 1918.04.24) |
| 1918.05.04 | Vicar Apostolic emeritus of Trichur of the Syro-Malabars (India) (1887.09.13 – 1896) |
| 1918.05.12 | Titular Bishop of Augusta (1894.05.21 – 1918.05.12) |
| 1918.05.17 | Bishop of Brixen (Italy) ([1912.09.27] 1912.11.06 – 1918.05.17) |
| 1918.05.26 | |
| 1918.06.04 | Bishop of São Luís do Maranhão (Brazil) (1907.04.18 – 1918.06.04) |
| 1918.06.06 | Metropolitan Archbishop of Burgos (Spain) (1913.07.18 – 1918.06.06) |
| 1918.06.09 | Metropolitan Archbishop of Santiago (Chile) (1908.08.08 – 1918.06.09) |
| 1918.06.22 | Metropolitan Archbishop emeritus of Dubuque (USA) (1900.07.24 – 1911.04.28) |
| 1918.07.04 | Cardinal-Priest of S. Agostino (1902.06.09 – 1918.07.04) Prefect of Congregation for Sacred Rites (1909.02.08 – 1918.07.04) |
| 1918.07.06 | Metropolitan Archbishop of Salzburg (Austria) ([1914.04.02] 1914.05.25 – 1918.07.06) |
| 1918.07.10 | |
| 1918.07.11 | Bishop of Sion (Switzerland) (1901.02.26 – 1918.07.11) |
| 1918.07.12 | |
| 1918.07.16 | Bishop of Alessandria (Italy) (1897.04.19 – 1918.07.16) |
| 1918.07.20 | Auxiliary Bishop of Napoli (Italy) (1906.12.06 – 1918.07.20) |
| 1918.07.25 | Metropolitan Archbishop of Besançon (France) (1910.01.20 – 1918.07.25) |
| 1918.07.27 | Metropolitan Archbishop of Urmyā of the Chaldeans (Iran) (1892.09.04 – 1918.07.27) |
| 1918.07.27 | |
| 1918.08.13 | Auxiliary Bishop of Providence (USA) (1917.08.24 – 1918.08.13) |
| 1918.08.13 | |
| 1918.08.21 | Titular Bishop of Arethusus of the Syriacs (1912.09.14 – 1918.08.21) |
| 1918.08.22 | Auxiliary Bishop of Westminster (England) (1904.04.16 – 1918.08.22) |
| 1918.08.31 | |
| 1918.09.07 | Bishop of Saïdā of the Maronites (Lebanon) (1900.02.18 – 1918.09.07) |
| 1918.09.07 | Bishop of Indianapolis (USA) (1898.03.28 – 1918.09.07) |
| 1918.09.17 | Cardinal-Priest of S. Maria sopra Minerva (1911.11.30 – 1918.09.17) Metropolitan Archbishop of New York (USA) (1902.09.15 – 1918.09.17) |
| 1918.09.23 | Archbishop emeritus of L’Aquila (Italy) (1907.04.15 – 1916.01.21) |
| 1918.09.23 | Bishop emeritus of Matanzas (Cuba) (1913.04.26 – 1914.02.11) |
| 1918.09.25 | Metropolitan Archbishop of Saint Paul (USA) (1888.05.04 – 1918.09.25) |
| 1918.10.01 | Titular Archbishop of Tamiathis (1904.11.14 – 1918.10.01) |
| 1918.10.03 | Vicar Apostolic emeritus of Northern Burma (Myanmar) (1872.10.01 – 1887.05.01) |
| 1918.10.04 | Archbishop of Barletta (Italy) (1915.12.06 – 1918.10.04) Metropolitan Archbishop of Trani (Italy) (1915.12.06 – 1918.10.04) |
| 1918.10.09 | Vicar Apostolic of Archipelago of the Navigators (Samoa) (1896.03.30 – 1918.10.09) |
| 1918.10.10 | Bishop of Tarentaise (France) (1907.11.28 – 1918.10.10) |
| 1918.10.15 | |
| 1918.10.19 | Bishop emeritus of Nancy (France) ([1882.03.23] 1882.03.30 – 1913.08.01) |
| 1918.10.25 | |
| 1918.10.31 | Auxiliary Bishop of Gniezno (Poland) (1915.06.30 – 1918.10.31) |
| 1918.11.22 | Bishop of Dunedin (New Zealand) (1896.01.24 – 1918.11.22) |
| 1918.11.29 | Bishop of Luxembourg (Luxembourg) (1883.09.28 – 1918.11.29) |
| 1918.12.11 | Cardinal-Priest of Ss. Silvestro e Martino ai Monti (1915.12.09 – 1918.12.11) Metropolitan Archbishop emeritus of Port-au-Prince (Haiti) (1894.10.01 – 1902.08.23) Prefect of Sacred Congregation of Religious (1917.02.13 – 1918.12.11) |
| 1918.12.11 | Metropolitan Archbishop of Vrhbosna (Bosnia and Herzegovina) (1881.11.18 – 1918.12.11) |
| 1918.12.17 | Bishop of Bagnoregio (Italy) (1912.08.28 – 1918.12.17) |
| 1918.12.23 | Metropolitan Archbishop of Genova (Italy) (1915.01.22 – 1918.12.23) |
| 1918.12.23 | Metropolitan Archbishop of Tarragona (Spain) (1913.07.18 – 1918.12.23) |
| 1918.12.27 |
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