| Date of Death | Deceased Bishops (50) |
| 1912.01.02 | Vicar Apostolic of Bight of Benin (Nigeria) (1902.07.19 – 1912.01.02) |
| 1912.01.08 | Archbishop emeritus of Perugia (Italy) (1895.11.29 – 1910.09.30) |
| 1912.01.11 | Metropolitan Archbishop of Tokyo 東京 (Japan) (1910.09.15 – 1912.01.11) |
| 1912.01.17 | Vicar Apostolic emeritus of New Guinea (Papua New Guinea) (1889.05.10 – 1908.01) |
| 1912.01.19 | Titular Archbishop of Pharsalus (1901.07.17 – 1912.01.19) Apostolic Nuncio to Austria-Hungary (1911.02.02 – 1912.01.19) |
| 1912.02.04 | Metropolitan Archbishop of La Plata (Bolivia) (1906.04.30 – 1912.02.04) |
| 1912.02.06 | Vicar Apostolic emeritus of Central Africa (Sudan) (1882.10.04 – 1895) President of Pontifical Ecclesiastical Academy (1903 – 1912.02.06) |
| 1912.02.11 | Bishop emeritus of Baalbek of the Greek-Melkites (Lebanon) (1886 – 1894) Superior General of Society of Missionaries of Saint Paul (1903.08.15 – 1912.02.11) |
| 1912.02.28 | Titular Archbishop of Trapezus (1889.02.11 – 1912.02.28) |
| 1912.03.05 | Auxiliary Bishop of Olomouc (Czechia) (1906.12.06 – 1912.03.05) |
| 1912.04.23 | Metropolitan Archbishop of Bamberg (Germany) ([1905.01.30] 1905.03.27 – 1912.04.23) |
| 1912.05.01 | Metropolitan Archbishop of Cagliari (Italy) (1900.12.17 – 1912.05.01) |
| 1912.05.03 | |
| 1912.05.11 | Auxiliary Bishop of Paderborn (Germany) (1890.05.02 – 1912.05.11) |
| 1912.05.13 | Auxiliary Bishop of Wien (Austria) (1899.01.11 – 1912.05.13) |
| 1912.05.19 | |
| 1912.05.27 | Vicar Apostolic of Marquesas Islands (French Polynesia) (1892.06.03 – 1912.05.27) |
| 1912.05.29 | |
| 1912.06.02 | Bishop of Le Mans (France) ([1898.03.22] 1898.03.24 – 1912.06.02) |
| 1912.06.02 | Bishop of Mukačeve of the Ruthenians (Ukraine) (1891.12.17 – 1912.06.02) |
| 1912.06.02 | Vicar Apostolic of Eastern Kiangsi 江西東境 (China) (1885.07.11 – 1912.06.02) |
| 1912.06.19 | Metropolitan Archbishop of Guadalajara (Mexico) (1901.09.16 – 1912.06.19) |
| 1912.06.20 | Titular Bishop of Danaba-orum (1884.03.27 – 1912.06.20) Apostolic Administrator of Banjaluka (Bosnia and Herzegovina) (1884.03.27 – 1912.06.20) |
| 1912.06.25 | Bishop of Brixen (Italy) ([1904.05.06] 1904.07.02 – 1912.06.25) |
| 1912.06.27 | Vicar Apostolic of Unianyembé (Tanzania) (1897.01.28 – 1912.06.27) |
| 1912.07.07 | Vicar Apostolic of Southern Tonking (Vietnam) (1911.02.09 – 1912.07.07) |
| 1912.07.30 | Cardinal-Priest of Ss. Nereo ed Achilleo (1903.06.25 – 1912.07.30) Metropolitan Archbishop of Köln (Germany) (1903.02.14 – 1912.07.30) |
| 1912.08.06 | |
| 1912.08.13 | |
| 1912.08.15 | Bishop emeritus of San Miniato (Italy) (1897.02.02 – 1907.08.30) |
| 1912.08.20 | Cardinal-Priest of S. Marco (1906.12.06 – 1912.08.20) Metropolitan Archbishop of Eger (Hungary) (1873.07.25 – 1912.08.20) |
| 1912.08.26 | Bishop of Bragança e Miranda (Portugal) (1885.07.30 – 1912.08.26) |
| 1912.09.02 | Bishop emeritus of Plymouth (England) (1902.10.25 – 1911.03.16) |
| 1912.09.12 | Cardinal-Priest of SS. Trinità al Monte Pincio (1898.03.24 – 1912.09.12) Metropolitan Archbishop of Lyon (France) (1893.06.15 – 1912.09.12) |
| 1912.09.17 | Bishop emeritus of Harbour Grace (Canada) (1881.05.24 – 1906.09.03) |
| 1912.09.24 | |
| 1912.10.13 | Auxiliary Bishop of Santiago (Chile) (1901.01.14 – 1912.10.13) |
| 1912.10.19 | |
| 1912.10.28 | Metropolitan Archbishop of Burgos (Spain) (1909.04.29 – 1912.10.28) |
| 1912.10.30 | Vicar Apostolic emeritus of Senegambia (Senegal) (1889.07.30 – 1898.12.15) |
| 1912.11.03 | |
| 1912.11.09 | |
| 1912.11.14 | Cardinal-Priest of S. Maria del Popolo (1886.01.15 – 1912.11.14) Metropolitan Archbishop of Capua (Italy) (1880.08.20 – 1912.11.14) |
| 1912.11.27 | Bishop of Aguascalientes (Mexico) (1902.03.08 – 1912.11.27) |
| 1912.11.27 | Bishop emeritus of Sansepolcro (Italy) (1892.07.11 – 1911.07.03) |
| 1912.12 | Archbishop of Aleppo of the Maronites (Syria) (1896.03.22 – 1912.12) |
| 1912.12.01 | Bishop of Charlottetown (Canada) (1891.05.01 – 1912.12.01) |
| 1912.12.02 | Ordinary of Silicia of the Italo-Albanese (Italy) (1902.04.24 – 1912.12.02▼) Ordinary of Italia continentale of the Italo-Albanese (Italy) (1902.04.24 – 1912.12.02) |
| 1912.12.07 | Metropolitan Archbishop of Warszawa (Poland) (1883.03.15 – 1912.12.07) |
| 1912.12.27 | Bishop of Poreč i Pula (Croatia) (1884.11.13 – 1912.12.27) |
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