| Date of Death | Deceased Bishops (82) |
| 1951.01.01 | Almoner of His Holiness of Office of Papal Charities (1935.12.19 – 1951.01.01) |
| 1951.01.03 | Bishop of Ancyra of the Armenians (Turkiye) (1911.08.27 – 1951.01.03) |
| 1951.01.08 | Bishop of Kottayam of the Syro-Malabars (India) (1923.12.21 – 1951.01.08) |
| 1951.01.13 | Cardinal-Bishop of Ostia (1948.02.16 – 1951.01.13) Cardinal-Bishop of Frascati (1936.06.15 – 1951.01.13) Prefect of Sacred Congregation of Ceremonies (1948.02.16 – 1951.01.13) President of Pontifical Commission for Sacred Archaeology (1931 – 1951.01.13) Archpriest of Papal Archbasilica of Saint John Lateran (1931.05.26 – 1951.01.13) Vicar General for the Vicariate of Rome of Roma (Italy) (1931.02.09 – 1951.01.13) Secretary of Supreme Sacred Congregation of the Holy Office (1939.04.30 – 1951.01.13) |
| 1951.01.17 | Vicar Apostolic emeritus of Cape Town (South Africa) (1939.06.13 – 1949) |
| 1951.01.19 | Bishop emeritus of Anglona–Tursi (Italy) (1935.05.05 – 1945.09.12) |
| 1951.01.19 | Auxiliary Bishop of Trier (Germany) (1941.05.12 – 1951.01.19) |
| 1951.01.23 | |
| 1951.01.28 | Archbishop emeritus of Zadar (Croatia) (1933.03.16 – 1948.12.11) |
| 1951.02.07 | Metropolitan Archbishop emeritus of Aix (France) (1940.05.11 – 1944.12.13) |
| 1951.02.13 | Bishop of Częstochowa (Poland) (1925.12.14 – 1951.02.13) |
| 1951.02.18 | Bishop of Breda (Netherlands) (1914.09.08 – 1951.02.18) |
| 1951.02.21 | |
| 1951.02.24 | |
| 1951.03.09 | |
| 1951.03.14 | Bishop emeritus of Ogliastra (Italy) (1923.03.02 – 1925.02.13) |
| 1951.03.16 | Bishop emeritus of Włocławek (Poland) (1929.04.05 – 1950.04.22) |
| 1951.03.18 | Metropolitan Archbishop of Urmyā of the Chaldeans (Iran) (1939.12.06 – 1951.03.18) Archbishop-Bishop of Salmas of the Chaldeans (Iran) (1939.12.06 – 1951.03.18) |
| 1951.03.20 | Vicar Apostolic of Bubuka (Tanzania) (1947.11.13 – 1951.03.20) |
| 1951.03.25 | Bishop emeritus of San Juan de Puerto Rico (Puerto Rico) (1924.11.21 – 1925.12.22) |
| 1951.03.28 | |
| 1951.04.03 | Bishop emeritus of Fenyang 汾陽 (China) (1946.04.11 – 1948.01.15) |
| 1951.04.05 | Bishop of Montefiascone (Italy) (1910.12.19 – 1951.04.05) |
| 1951.04.06 | Bishop emeritus of La Paz (Bolivia) (1924.11.15 – 1934.02.24) |
| 1951.04.18 | Bishop of Saint-Flour (France) (1943.01.12 – 1951.04.18) |
| 1951.04.21 | Titular Archbishop of Ægina (1935.08.05 – 1951.04.21) |
| 1951.04.29 | Auxiliary Bishop emeritus of Spiš (Slovakia) (1915.12.19 – 1946) |
| 1951.05.07 | Metropolitan Archbishop of Olinda e Recife (Brazil) (1922.02.10 – 1951.05.07) |
| 1951.05.09 | Titular Archbishop of Corinthus (1927.11.06 – 1951.05.09) Apostolic Nuncio to Ireland (1949.09.02 – 1951.05.09) |
| 1951.05.09 | Bishop of Vijayawada (India) (1938.12.03 – 1951.05.09) |
| 1951.05.13 | Auxiliary Bishop of San Juan de Cuyo (Argentina) (1913.05.30 – 1951.05.13) |
| 1951.05.17 | Bishop of Fall River (USA) (1934.07.28 – 1951.05.17) |
| 1951.05.24 | Metropolitan Archbishop of São Luís do Maranhão (Brazil) (1947.01.18 – 1951.05.24) |
| 1951.05.31 | Cardinal-Priest of Ss. Nereo ed Achilleo (1921.03.10 – 1951.05.31) Metropolitan Archbishop of Philadelphia (USA) (1918.05.01 – 1951.05.31) |
| 1951.06.03 | Bishop emeritus of Saskatoon (Canada) (1934.04.18 – 1944.01.08) Coadjutor Archbishop of Winnipeg (Canada) (1944.01.08 – 1951.06.03) |
| 1951.06.11 | |
| 1951.06.18 | Bishop of Carcassonne (France) (1932.08.16 – 1951.06.18) |
| 1951.06.28 | Bishop emeritus of Huejutla (Mexico) (1922.12.11 – 1939.07.01) |
| 1951.07.16 | Vicar Apostolic of Eastern New Guinea (Papua New Guinea) (1948.07.08 – 1951.07.16) |
| 1951.07.21 | Cardinal-Priest of S. Maria Nuova (1946.02.22 – 1951.07.21) Metropolitan Archbishop of Kraków (Poland) (1925.10.28 – 1951.07.21) |
| 1951.07.31 | Metropolitan Archbishop of Gorizia e Gradisca (Italy) (1934.07.25 – 1951.07.31) |
| 1951.07.31 | Bishop of Santa Rosa de Copán (Honduras) (1928.12.17 – 1951.07.31) |
| 1951.08.07 | Apostolic Exarch emeritus of Sofia of the Bulgarians (Bulgaria) (1942.07.06 – 1951.04.27) |
| 1951.08.07 | Bishop emeritus of Ayacucho (Peru) (1936.05.30 – 1939.07.21) |
| 1951.08.12 | |
| 1951.08.13 | Vicar Apostolic emeritus of Anguo 安國 (China) (1929.07.13 – 1936.02.07) |
| 1951.08.18 | Bishop emeritus of Yan’an 延安 (China) (1946.04.11 – 1949.01.13) |
| 1951.08.19 | Vicar Apostolic of Kontum (Vietnam) (1941.12.23 – 1951.08.19) |
| 1951.08.22 | Auxiliary Bishop of Łomża (Poland) (1946.12.06 – 1951.08.22) |
| 1951.08.23 | Metropolitan Archbishop of Monreale (Italy) (1925.04.06 – 1951.08.23) |
| 1951.08.26 | |
| 1951.08.26 | Auxiliary Bishop of Münster (Germany) (1948.10.08 – 1951.08.26) |
| 1951.09.01 | Ordinary emeritus of Eritrea of the Eritreans (Eritrea) (1930.07.04 – 1951.02.24) |
| 1951.09.03 | Master of the Order emeritus of Order of Preachers (Dominicans) (1929 – 1946.09.30) |
| 1951.09.03 | Bishop of Hong Kong 香港 (Hong Kong) (1946.04.11 – 1951.09.03) |
| 1951.09.09 | |
| 1951.10.17 | |
| 1951.10.17 | Auxiliary Bishop of Pompei (Italy) (1927.04.08 – 1951.10.17) |
| 1951.10.19 | Bishop of Resistencia (Argentina) (1940.08.01 – 1951.10.19) |
| 1951.10.24 | Bishop of Bacolod (Philippines) (1933.06.23 – 1951.10.24) |
| 1951.10.25 | Superior General emeritus of Congregation of Marian Fathers of the Immaculate Conception of the Blessed Virgin Mary (Marian Fathers) (1939 – 1951.05.14) |
| 1951.11.03 | |
| 1951.11.08 | |
| 1951.11.10 | Bishop of Peoria (USA) (1930.04.19 – 1951.11.10) Archbishop ad personam (1951.06.17 – 1951.11.10) |
| 1951.11.10 | |
| 1951.11.11 | Auxiliary Bishop emeritus of Siedlce (Poland) (1919.07.25 – 1946) |
| 1951.11.18 | Auxiliary Bishop of Augsburg (Germany) (1934.06.02 – 1951.11.18) |
| 1951.11.19 | |
| 1951.11.24 | Bishop of Xiwanzi 西灣子 (China) (1946.04.11 – 1951.11.24) |
| 1951.11.25 | |
| 1951.11.27 | Titular Bishop of Geras (1938.04.12 – 1951.11.27) |
| 1951.12.01 | Bishop of Espírito Santo (Brazil) (1933.07.28 – 1951.12.01) |
| 1951.12.03 | Vicar Apostolic of Basankusu (Congo-Kinshasa) (1948.07.08 – 1951.12.03) |
| 1951.12.05 | Metropolitan Archbishop emeritus of Monterrey (Mexico) (1929.09.20 – 1940.05.02) |
| 1951.12.05 | Archbishop-Bishop of Zacatecas (Mexico) (1922.10.27 – 1951.12.05) |
| 1951.12.08 | Bishop emeritus of Gravelbourg (Canada) (1937.06.02 – 1942.11.07) |
| 1951.12.10 | |
| 1951.12.14 | Archbishop of Mossul of the Syriacs (Iraq) (1926.07.31 – 1951.12.14) |
| 1951.12.16 | Auxiliary Bishop of Southwark (England) (1924.01.29 – 1951.12.16) |
| 1951.12.17 | Archbishop-Bishop emeritus of Poona (India) (1927.07.14 – 1948.01.15) |
| 1951.12.18 | Auxiliary Bishop emeritus of Carthage (Tunisia) (1930.05.28 – 1937.08) |
| 1951.12.20 | Archbishop-Bishop of Trier (Germany) (1944.01.04 – 1951.12.20) |
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