| Date of Death | Deceased Bishops (66) |
| 1956.01.03 | Bishop emeritus of Recanati (Italy) (1923.12.20 – 1955.08.12) |
| 1956.01.04 | |
| 1956.01.10 | Metropolitan Archbishop of Ernakulam of the Syro-Malabars (India) (1923.12.21 – 1956.01.10) |
| 1956.01.20 | |
| 1956.02.01 | |
| 1956.02.09 | Metropolitan Archbishop of México (Mexico) (1937.02.20 – 1956.02.09) |
| 1956.02.15 | |
| 1956.02.15 | |
| 1956.02.23 | Bishop of Hanyang 漢陽 (China) (1946.04.11 – 1956.02.23) |
| 1956.02.27 | Bishop emeritus of Jaffna (Sri Lanka) (1924.01.16 – 1950.07.18) |
| 1956.02.28 | Auxiliary Bishop of Warszawa (Poland) (1928.07.09 – 1956.02.28) |
| 1956.03.02 | |
| 1956.03.04 | |
| 1956.03.04 | |
| 1956.03.10 | Metropolitan Archbishop of Albi (France) (1940.05.11 – 1956.03.10) |
| 1956.03.22 | Metropolitan Archbishop of Cuiabá (Brazil) (1921.08.26 – 1956.03.22) |
| 1956.04.02 | Metropolitan Archbishop of Hangzhou 杭州 (China) (1946.04.11 – 1956.04.02) |
| 1956.04.21 | Bishop of Boise City (USA) (1927.12.16 – 1956.04.21) |
| 1956.04.25 | Metropolitan Archbishop of Eger (Hungary) (1943.05.07 – 1956.04.25) |
| 1956.04.25 | |
| 1956.05.12 | |
| 1956.05.16 | |
| 1956.05.17 | Bishop emeritus of La Spezia (Italy) (1929.02.08 – 1943.07.26) Bishop emeritus of Brugnato (Italy) (1929.02.08 – 1943.07.26) Bishop emeritus of Luni–Sarzana (Italy) (1929.02.08 – 1943.07.26) |
| 1956.05.17 | Vicar Apostolic emeritus of Loango (Congo-Brazzaville) (1922.03.22 – 1946.04.04) |
| 1956.05.18 | Bishop emeritus of Ruvo (Italy) (1929.08.27 – 1949.04.30) Bishop emeritus of Bitonto (Italy) (1929.08.27 – 1949.04.30) |
| 1956.05.20 | Auxiliary Bishop emeritus of Lutsk (Ukraine) (1916.10.21 – 1949.01.14) |
| 1956.05.23 | |
| 1956.05.26 | Metropolitan Archbishop of Kirkuk of the Chaldeans (Iraq) (1954.02.08 – 1956.05.26) |
| 1956.06.14 | Metropolitan Archbishop emeritus of Santiago (Chile) (1931.08.11 – 1939.07.29) |
| 1956.06.27 | Bishop emeritus of Tiruvalla of the Syro-Malankara (India) (1932.06.11 – 1950.07.25) |
| 1956.07.21 | Vicar Apostolic emeritus of Cape of Good Hope, Western District (South Africa) (1925.07.15 – 1932.06.06) |
| 1956.07.31 | Bishop of Fort Wayne (USA) (1924.05.12 – 1956.07.31) Archbishop ad personam (1953.09.02 – 1956.07.31) |
| 1956.07.31 | Bishop emeritus of Seckau (Austria) (1927.04.26 – 1953.12.07) |
| 1956.08.01 | |
| 1956.08.04 | |
| 1956.08.05 | Auxiliary Bishop of Köln (Germany) (1932.02.09 – 1956.08.05) |
| 1956.08.12 | Vicar Apostolic emeritus of Antsirabé (Madagascar) (1947.02.13 – 1955.03) |
| 1956.08.13 | Bishop-Prelate of Registro do Araguaia (Brazil) (1937.12.27 – 1956.08.13) |
| 1956.08.14 | Bishop of Hildesheim (Germany) (1934.06.22 – 1956.08.14) Archbishop ad personam (1956.07.13 – 1956.08.14) |
| 1956.08.20 | Cardinal-Priest of Ss. Andrea e Gregorio al Monte Celio (1946.02.22 – 1956.08.20) Metropolitan Archbishop of Westminster (England) (1943.12.18 – 1956.08.20) |
| 1956.08.21 | |
| 1956.08.31 | |
| 1956.09.01 | Apostolic Exarch of Manitoba of the Ukrainians (Canada) (1929.05.20 – 1956.09.01) |
| 1956.09.11 | Bishop of Kansas City–Saint Joseph (USA) (1956.07.02 – 1956.09.11) Archbishop ad personam (1954.06.29 – 1956.09.11) |
| 1956.09.13 | Coadjutor Archbishop of Westminster (England) (1951.01.20 – 1956.09.13) |
| 1956.09.27 | Auxiliary Bishop of México (Mexico) (1951.04.13 – 1956.09.27) |
| 1956.09.30 | |
| 1956.10.01 | Auxiliary Bishop of Brooklyn (USA) (1934.12.22 – 1956.10.01) |
| 1956.10.07 | Bishop emeritus of Irsina (Italy) (1922.05.12 – 1953.04.15) Bishop emeritus of Gravina (Italy) (1922.05.12 – 1953.04.15) |
| 1956.10.08 | Bishop of Città di Castello (Italy) (1934.09.29 – 1956.10.08) |
| 1956.10.10 | Auxiliary Bishop emeritus of Innsbruck–Feldkirch (Austria) (1936.08.08 – 1955.10.01) |
| 1956.10.11 | Metropolitan Archbishop of Saint Paul (USA) (1931.10.29 – 1956.10.11) |
| 1956.10.21 | Bishop of Luxembourg (Luxembourg) (1935.10.09 – 1956.10.21) |
| 1956.10.22 | Metropolitan Archbishop of Poznań (Poland) (1946.05.03 – 1956.10.22) |
| 1956.10.28 | Metropolitan Archbishop of Tours (France) (1931.09.25 – 1956.10.28) |
| 1956.10.30 | Archbishop-Bishop of Zaku of the Chaldeans (Iraq) (1937.04.20 – 1956.10.30) |
| 1956.10.30 | |
| 1956.10.31 | Metropolitan Archbishop of Modena (Italy) (1940.03.28 – 1956.10.31) Abbot nullius of Nonantola (Italy) (1940.03.28 – 1956.10.31) |
| 1956.11.03 | Bishop of Burlington (USA) (1944.11.11 – 1956.11.03) |
| 1956.11.05 | Cardinal-Priest of S. Pudenziana (1946.05.17 – 1956.11.05) Metropolitan Archbishop of Toulouse (France) (1928.12.17 – 1956.11.05) |
| 1956.11.09 | |
| 1956.11.12 | Bishop of Hradec Králové (Czechia) (1931.10.22 – 1956.11.12) |
| 1956.11.15 | Auxiliary Bishop of Santa Fe (Argentina) (1921.11.25 – 1956.11.15) |
| 1956.11.26 | Bishop of Brooklyn (USA) (1921.11.21 – 1956.11.26) Archbishop ad personam (1951.04.07 – 1956.11.26) |
| 1956.12.11 | |
| 1956.12.18 | Bishop emeritus of Sant’Agata de’ Goti (Italy) (1916.09.12 – 1953.04.01) |
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