| Date of Death | Deceased Bishops (67) |
| 1964.01.03 | Metropolitan Archbishop emeritus of Brindisi (Italy) (1942.11.26 – 1953.09.01) |
| 1964.01.10 | |
| 1964.01.11 | Cardinal-Deacon of S. Giorgio in Velabro (1958.12.18 – 1964.01.11) Dean emeritus of Sacred Roman Rota (1944.10.30 – 1958.12.15) |
| 1964.01.13 | Vicar Apostolic emeritus of Lulua (Congo-Kinshasa) (1934.02.26 – 1949) |
| 1964.01.21 | Cardinal-Priest of S. Maria in Portico pro hac vice Title (1958.12.18 – 1964.01.21) |
| 1964.01.27 | |
| 1964.01.28 | Bishop of Christchurch (New Zealand) (1950.04.18 – 1964.01.28) |
| 1964.02.02 | Vicar Apostolic emeritus of Hung Hoá (Vietnam) (1945.01.11 – 1960.03.05) |
| 1964.02.11 | |
| 1964.02.12 | Bishop of Beirut of the Chaldeans (Lebanon) (1957.06.28 – 1964.02.12) |
| 1964.02.15 | |
| 1964.02.18 | Bishop of Morondava (Madagascar) (1955.09.14 – 1964.02.18) |
| 1964.02.22 | |
| 1964.02.24 | |
| 1964.03.02 | Auxiliary Bishop of Ivano-Frankivsk of the Ukrainians (Ukraine) (1945 – 1964.03.02) |
| 1964.03.05 | |
| 1964.03.07 | Metropolitan Archbishop of Olinda e Recife (Brazil) (1960.03.26 – 1964.03.07) |
| 1964.03.19 | |
| 1964.03.24 | Archbishop of Beograd (Serbia) (1936.11.28 – 1964.03.24) Apostolic Administrator of Jugoslavenska Banat (Serbia) (1936.11.28 – 1964.03.24) |
| 1964.03.26 | Auxiliary Bishop of Birmingham (England) (1944.08.31 – 1964.03.26) |
| 1964.04.02 | Bishop of Cádiz y Ceuta (Spain) (1943.11.11 – 1964.04.02) |
| 1964.04.08 | |
| 1964.04.10 | Auxiliary Bishop of Fulda (Germany) (1953.04.12 – 1964.04.10) |
| 1964.04.11 | |
| 1964.04.12 | Metropolitan Archbishop of Oviedo (Spain) (1954.10.27 – 1964.04.12) |
| 1964.04.16 | Auxiliary Bishop of Spiš (Slovakia) (1949.10.25 – 1964.04.16) |
| 1964.04.29 | |
| 1964.05.04 | Titular Archbishop of Cesarea Philippi (1950.02.13 – 1964.05.04) Apostolic Nuncio to Brazil (1954 – 1964.05.04) |
| 1964.05.26 | |
| 1964.06.08 | Vicar Apostolic of Benghazi (Libya) (1951.07.05 – 1964.06.08) |
| 1964.06.08 | Bishop of Montepulciano (Italy) (1933.09.18 – 1964.06.08) |
| 1964.06.15 | Vicar Apostolic emeritus of Aliwal (South Africa) (1936.01.27 – 1944.02.03) |
| 1964.06.19 | |
| 1964.07.11 | |
| 1964.07.18 | |
| 1964.07.28 | Bishop emeritus of Toowoomba (Australia) (1938.07.13 – 1952.10.14) |
| 1964.07.31 | Metropolitan Archbishop emeritus of Port-au-Prince (Haiti) (1930.12.05 – 1955.06.24) |
| 1964.07.31 | Bishop of Kasongo (Congo-Kinshasa) (1963.04.05 – 1964.07.31) |
| 1964.08.10 | Coadjutor Vicar Apostolic emeritus of Mackenzie (Canada) (1931.06.23 – 1940) |
| 1964.08.14 | Bishop of Sovana–Pitigliano (Italy) (1963.08.14 – 1964.08.14) |
| 1964.08.16 | Bishop emeritus of ’s-Hertogenbosch (Netherlands) (1943.03.18 – 1960.06.27) |
| 1964.08.19 | Bishop of Brescia (Italy) (1933.12.21 – 1964.08.19) Archbishop ad personam (1958 – 1964.08.19) |
| 1964.08.22 | |
| 1964.08.26 | Bishop emeritus of Breda (Netherlands) (1951.02.18 – 1961.09.08) |
| 1964.09.04 | Cardinal-Priest of S. Balbina (1946.02.22 – 1964.09.04) Metropolitan Archbishop of Rennes (France) (1940.05.11 – 1964.09.04) |
| 1964.09.10 | Bishop emeritus of Langres (France) (1939.10.06 – 1964.01.15) |
| 1964.09.21 | Military Vicar emeritus of Poland (Poland) (1933.02.15 – 1947) |
| 1964.09.21 | Apostolic Administrator emeritus of Southern Albania (Albania) (1940 – 1945) |
| 1964.09.21 | |
| 1964.10.11 | |
| 1964.10.11 | Bishop emeritus of Kisantu (Congo-Kinshasa) (1959.11.10 – 1960.10.27) |
| 1964.10.12 | Bishop emeritus of Belgaum (India) (1953.09.19 – 1964.03.15) |
| 1964.11.04 | Bishop of Alessandria (Italy) (1945.10.30 – 1964.11.04) |
| 1964.11.08 | Metropolitan Archbishop of New Orleans (USA) (1935.03.09 – 1964.11.08) |
| 1964.11.12 | |
| 1964.11.13 | |
| 1964.11.13 | Bishop emeritus of Termoli (Italy) (1924.10.28 – 1962.03.19) |
| 1964.11.18 | Bishop of Qingdao 青島 (China) (1948.07.08 – 1964.11.18) |
| 1964.11.21 | Archbishop-Bishop of Gaspé (Canada) (1957.09.09 – 1964.11.21) |
| 1964.11.23 | Bishop of Des Moines (USA) (1948.03.13 – 1964.11.23) |
| 1964.11.26 | Vicar Apostolic emeritus of Rabaul (Papua New Guinea) (1939.06.13 – 1963) |
| 1964.11.26 | Bishop of Wamba (Congo-Kinshasa) (1959.11.10 – 1964.11.26) |
| 1964.11.28 | Bishop emeritus of Conversano (Italy) (1935.09.12 – 1964.05.24) |
| 1964.12.10 | Metropolitan Archbishop of Guatemala (Guatemala) (1939.01.08 – 1964.12.10) Bishop-Prelate of Santo Cristo de Esquipulas (Guatemala) (1956.09.16 – 1964.12.10) |
| 1964.12.10 | |
| 1964.12.16 | Bishop emeritus of Tamatave (Madagascar) (1955.09.14 – 1957.03.15) |
| 1964.12.29 | Bishop of Assiut of the Copts (Egypt) (1947.08.09 – 1964.12.29) |
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