| 1900 | 1901 |
| Date of Death | Deceased Bishops (73) |
| 1900? | Bishop of Trapezus of the Armenians (Turkiye) (1877.08.14 – 1900?) |
| 1900.01.07 | Metropolitan Archbishop of Michoacán (Mexico) (1868.12.21 – 1900.01.07) |
| 1900.01.09 | |
| 1900.01.16 | Auxiliary Bishop emeritus of Bourges (France) (1888.06.01 – 1892.05.26) |
| 1900.01.17 | Cardinal-Deacon of S. Eustachio (1899.06.22 – 1900.01.17) Secretary of Sacred Congregation of Bishops and Regulars (1896.12.24 – 1900.01.17) |
| 1900.01.30 | |
| 1900.02.01 | Cardinal-Priest of Ss. Marcellino e Pietro (1896.12.03 – 1900.02.01) Vicar General for the Vicariate of Rome of Roma (Italy) (1899.12.14 – 1900.02.01) |
| 1900.02.02 | Bishop of Roermond (Netherlands) (1886.06.18 – 1900.02.02) |
| 1900.02.05 | Metropolitan Archbishop of Lviv (Ukraine) (1885.02.15 – 1900.02.05) |
| 1900.02.05 | |
| 1900.02.06 | Metropolitan Archbishop of Buenos Aires (Argentina) (1895.09.12 – 1900.02.06) |
| 1900.02.15 | Titular Archbishop of Laodicea (1896.04.28 – 1900.02.15) |
| 1900.03.02 | Coadjutor Bishop emeritus of Sant’Agata de’ Goti (Italy) (1884.03.24 – 1896) |
| 1900.03.02 | |
| 1900.03.04 | Metropolitan Archbishop of Dubuque (USA) (1893.06.15 – 1900.03.04) |
| 1900.03.05 | Bishop of Mazara del Vallo (Italy) (1882.09.22 – 1900.03.05) |
| 1900.03.07 | Auxiliary Bishop of Santiago (Chile) (1892.07.11 – 1900.03.07) |
| 1900.03.12 | Cardinal-Priest of S. Marcello (1877.03.20 – 1900.03.12) |
| 1900.03.16 | President emeritus of Pontifical Ecclesiastical Academy (1892 – 1894) |
| 1900.03.22 | Military Vicar emeritus of Germany (Germany) (1868.05.22 – 1872.05.28) |
| 1900.03.26 | Cardinal-Bishop of Palestrina (1897.04.19 – 1900.03.26) Prefect emeritus of Sacred Congregation of Studies (1893.06.22 – 1897.04.19) |
| 1900.03.28 | |
| 1900.03.31 | |
| 1900.04.02 | Auxiliary Bishop of Wrocław (Poland) (1875.08.10 – 1900.04.02) |
| 1900.04.11 | Bishop of Tarentaise (France) ([1887.09.29] 1887.11.25 – 1900.04.11) |
| 1900.04.15 | |
| 1900.04.22 | |
| 1900.04.25 | |
| 1900.04.29 | Metropolitan Archbishop of Saint Andrews and Edinburgh (Scotland) (1892.07.15 – 1900.04.29) |
| 1900.05.04 | Metropolitan of Lviv–Halyč–Kamyanets of the Ukrainians (Ukraine) (1899.06.19 – 1900.05.04) |
| 1900.05.05 | Cardinal-Priest of S. Bartolomeo all’Isola (1896.06.25 – 1900.05.05) Metropolitan Archbishop of Salzburg (Austria) (1890.06.26 – 1900.05.05) |
| 1900.05.10 | |
| 1900.05.23 | Bishop of Portsmouth (England) (1882.06.03 – 1900.05.23) |
| 1900.06.02 | |
| 1900.06.12 | Bishop of Fort Wayne (USA) (1893.07.15 – 1900.06.12) |
| 1900.06.13 | Vicar Apostolic of Senegambia (Senegal) (1899.06.06 – 1900.06.13) Prefect Apostolic of Sénégal (Senegal) (1899.06.06 – 1900.06.13) |
| 1900.06.13 | |
| 1900.07.02 | Vicar Apostolic of Southern Manchuria 南滿 (China) (1898.05.10 – 1900.07.02) |
| 1900.07.04 | |
| 1900.07.07 | Vicar Apostolic of Southern Hunan 湖南南境 (China) (1892.07.11 – 1900.07.07) |
| 1900.07.09 | Coadjutor Vicar Apostolic of Northern Shanxi 山西北境 (China) (1898.07.18 – 1900.07.09) |
| 1900.07.09 | Vicar Apostolic of Northern Shanxi 山西北境 (China) (1890.06.17 – 1900.07.09) |
| 1900.07.15 | Vicar Apostolic of Southwestern Mongolia 西南蒙古 (China) (1888.08.30 – 1900.07.15) |
| 1900.07.15 | Bishop of Portoviejo (Ecuador) (1885.03.27 – 1900.07.15) |
| 1900.07.23 | |
| 1900.07.24 | Bishop of Angoulême (France) ([1899.12.07] 1899.12.14 – 1900.07.24) |
| 1900.07.25 | |
| 1900.08.05 | Bishop of Portland in Maine (USA) (1875.02.12 – 1900.08.05) |
| 1900.08.11 | Auxiliary Bishop emeritus of Rennes (France) (1877.09.11 – 1878.02.26) |
| 1900.08.11 | Bishop of Székesfehérvár (Hungary) (1890.06.26 – 1900.08.11) |
| 1900.08.20 | Metropolitan Archbishop of Modena (Italy) (1889.05.24 – 1900.08.20) Commendatory Abbot of Nonantola (Italy) (1889.05.24 – 1900.08.20) |
| 1900.08.20 | Archbishop of Aleppo of the Armenians (Syria) (1899.02.06 – 1900.08.20) |
| 1900.09.09 | Metropolitan Archbishop of Aix (France) ([1886.03.02] 1886.06.10 – 1900.09.09) |
| 1900.09.09 | Auxiliary Bishop of Madras (India) (1894.07.31 – 1900.09.09) |
| 1900.09.13 | |
| 1900.09.18 | Metropolitan Archbishop of Cagliari (Italy) (1893.01.16 – 1900.09.18) |
| 1900.09.26 | Bishop of Mende (France) ([1889.04.24] 1889.05.27 – 1900.09.26) |
| 1900.09.29 | Bishop emeritus of Ripatransone (Italy) (1890.06.23 – 1899) |
| 1900.10.11 | Bishop of Szombathely (Hungary) (1883.03.15 – 1900.10.11) |
| 1900.10.12 | Vicar Apostolic of Guangdong 廣東 (China) (1886.04.05 – 1900.10.12) |
| 1900.10.14 | Bishop of Sora (Italy) (1899.12.14 – 1900.10.14) Bishop of Pontecorvo (Italy) (1899.12.14 – 1900.10.14) |
| 1900.10.14 | Vicar Apostolic of Southeastern Chi-Li 直隸東南 (China) (1880.03.14 – 1900.10.14) |
| 1900.10.23 | Metropolitan emeritus of Lviv–Halyč–Kamyanets of the Ukrainians (Ukraine) (1870.06.27 – 1882.11.11) |
| 1900.10.27 | Bishop of Puebla–Tlaxcala (Mexico) (1896.12.03 – 1900.10.27) |
| 1900.11.11 | Archbishop of Mardin of the Armenians (Turkiye) (1864 – 1900.11.11) |
| 1900.11.18 | Bishop of Cerignola (Italy) (1887.05.23 – 1900.11.18) Bishop of Ascoli Satriano (Italy) (1887.05.23 – 1900.11.18) |
| 1900.11.19 | Bishop of Marseille (France) ([1878.06.13] 1878.07.15 – 1900.11.19) |
| 1900.11.24 | Bishop of Dromore (Northern Ireland) (1890.12.04 – 1900.11.24) |
| 1900.12.24 | Bishop of Mardin and Amida of the Syriacs (Turkiye) (1847.11.18 – 1900.12.24) |
| 1900.12.27 | Titular Archbishop of Attalia (1881.08.26 – 1900.12.27) |
| 1900.12.29 | Abbot nullius of New Norcia (Australia) (1867.03.12 – 1900.12.29) |
| 1900.12.31 | Metropolitan Archbishop of Guadalajara (Mexico) (1899.08.19 – 1900.12.31) |
| 1900.12.31 | Archbishop-Bishop emeritus of Gubbio (Italy) (1895.03.18 – 1900.04.19) |
| 1900 | 1901 |
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