| Date of Death | Deceased Bishops (84) |
| 1977 | Bishop emeritus of Hengzhou 衡州 (China) (1958 – ?▼) |
| 1977 | |
| 1977.01.04 | |
| 1977.01.07 | Bishop emeritus of Poitiers (France) (1956.08.04 – 1975.07.05) |
| 1977.01.12 | Bishop emeritus of Rochester (USA) (1937.07.31 – 1966.10.21) |
| 1977.01.17 | Bishop emeritus of São Mateus (Brazil) (1959.05.09 – 1970.05.14) Auxiliary Bishop of Belo Horizonte (Brazil) (1973.10.05 – 1977.01.17) |
| 1977.01.22 | Bishop emeritus of Crema (Italy) (1963.04.17 – 1963.12.18) General Ecclesiastical Assistant emeritus of Italian Catholic Action (1963.12.18 – 1972) |
| 1977.01.26 | |
| 1977.01.31 | Metropolitan Archbishop emeritus of Matera (Italy) (1954.07.02 – 1974) |
| 1977.02.06 | Vicar Apostolic of Araucanía (Chile) (1958.03.05 – 1977.02.06) |
| 1977.02.26 | |
| 1977.03.06 | |
| 1977.03.13 | Bishop emeritus of Marquette (USA) (1947.08.25 – 1968.01.05) |
| 1977.03.17 | |
| 1977.03.19 | Titular Bishop of Voli (1965.12.04 – 1977.03.19) |
| 1977.03.21 | Metropolitan Archbishop emeritus of Modena (Italy) (1956.12.23 – 1976.02.07) Abbot nullius emeritus of Nonantola (Italy) (1956.12.23 – 1976.02.07) |
| 1977.03.23 | Cardinal-Priest of S. Marco in Agro Laurentino (1973.03.05 – 1977.03.23) Metropolitan Archbishop of Brazzaville (Congo-Brazzaville) (1971.06.14 – 1977.03.23) |
| 1977.04.03 | Bishop emeritus of Tarbes et Lourdes (France) (1947.02.17 – 1970.02.12) |
| 1977.04.05 | Bishop of Valledupar (Colombia) (1969.04.25 – 1977.04.05) |
| 1977.04.12 | Vicar Apostolic emeritus of Caroline and Marshall Islands (Micronesia) (1956.12.09 – 1971.09.20) |
| 1977.04.14 | Metropolitan Archbishop emeritus of Braga (Portugal) (1963.12.12 – 1977.02.03) |
| 1977.04.14 | Bishop of Concordia–Pordenone (Italy) (1971.01.12 – 1977.04.14) |
| 1977.04.17 | Cardinal-Priest of S. Patrizio (1965.02.25 – 1977.04.17) Metropolitan Archbishop of Armagh (Northern Ireland) (1963.09.09 – 1977.04.17) |
| 1977.04.26 | |
| 1977.05.03 | Metropolitan Archbishop of Sorrento (Italy) (1972.07.30 – 1977.05.03) Bishop of Castellammare di Stabia (Italy) (1971.06.28 – 1977.05.03) |
| 1977.05.06 | Auxiliary Bishop emeritus of Scranton (USA) (1947.05.10 – 1973.05.15) |
| 1977.05.29 | Metropolitan Archbishop emeritus of Asunción (Paraguay) (1949.02.25 – 1970.06.16) |
| 1977.06.08 | Archbishop-Bishop of Minya of the Copts (Egypt) (1967.05.08 – 1977.06.08) |
| 1977.06.15 | |
| 1977.06.15 | |
| 1977.06.26 | Metropolitan Archbishop of Freiburg im Breisgau (Germany) ([1958.05.14] 1958.06.14 – 1977.06.26) |
| 1977.06.29 | Bishop emeritus of Antioquía (Colombia) (1944.06.16 – 1955.03.09) |
| 1977.06.30 | Auxiliary Bishop of Hartford (USA) (1964.11.09 – 1977.06.30) |
| 1977.07.04 | Archbishop emeritus of Singapore (Singapore) (1972.12.18 – 1977.02.03) |
| 1977.07.04 | |
| 1977.07.04 | Auxiliary Bishop emeritus of New York (USA) (1957.11.04 – 1972.08.12) |
| 1977.07.06 | |
| 1977.07.07 | Metropolitan Archbishop emeritus of Pisa (Italy) (1948.01.13 – 1970.09.22) |
| 1977.07.07 | Bishop emeritus of Penne e Pescara (Italy) (1949.07.02 – 1959.01.01) |
| 1977.07.11 | Bishop of San Nicolás de los Arroyos (Argentina) (1966.04.28 – 1977.07.11) |
| 1977.07.12 | Bishop emeritus of Kisantu (Congo-Kinshasa) (1961.06.24 – 1973.04.27) Archbishop ad personam (1971.11.08 – 1973.04.27) |
| 1977.07.16 | Cardinal-Priest of Ss. XII Apostoli (1967.06.26 – 1977.07.16) Prefect emeritus of Supreme Tribunal of the Apostolic Signatura (1959.11.14 – 1969.03.24) |
| 1977.07.24 | Metropolitan Archbishop of Guiyang 貴陽 (China) (1958 – 1977.07.24▼) |
| 1977.07.26 | Metropolitan Archbishop of Miami (USA) (1968.03.02 – 1977.07.26) |
| 1977.07.26 | Metropolitan Archbishop emeritus of Manizales (Colombia) (1959.07.07 – 1975.05.22) |
| 1977.08.01 | |
| 1977.08.02 | Cardinal-Priest of Ss. Marcellino e Pietro (1929.12.19 – 1977.08.02) Military Vicar emeritus of Portugal (Portugal) (1966 – 1972) |
| 1977.08.02 | Metropolitan Archbishop emeritus of San Antonio (USA) (1941.01.23 – 1969.05.23) |
| 1977.08.06 | Metropolitan Archbishop of Piura (Peru) (1966.06.30 – 1977.08.06) |
| 1977.08.07 | Cardinal-Priest of S. Maria sopra Minerva (1976.05.24 – 1977.08.07) Prefect of Supreme Tribunal of the Apostolic Signatura (1969.03.26 – 1977.08.07) |
| 1977.08.09 | Archbishop of Zahleh–Furzol of the Greek-Melkites (Lebanon) (1971.08.21 – 1977.08.09) |
| 1977.08.13 | |
| 1977.08.14 | Metropolitan Archbishop emeritus of Calcutta (India) (1962.08.08 – 1969.05.29) |
| 1977.08.16 | Bishop emeritus of Cairo of the Syriacs (Egypt) (1963.07.06 – 1965.12.03) |
| 1977.08.17 | Auxiliary Bishop emeritus of Boston (USA) (1959.11.04 – 1976.06.28) |
| 1977.08.19 | |
| 1977.08.20 | Metropolitan Archbishop of Poznań (Poland) (1957.05.30 – 1977.08.20) |
| 1977.08.23 | Metropolitan Archbishop emeritus of Cincinnati (USA) (1950.06.14 – 1969.07.19) |
| 1977.08.27 | Bishop emeritus of Basse-Terre et Pointe-à-Pitre (Guadeloupe) (1951.07.19 – 1968.01.29) |
| 1977.09 | Vicar Apostolic of Phnom Penh (Cambodia) (1976.04.30 – 1977.09) |
| 1977.09.02 | Metropolitan Archbishop of Dacca (Bangladesh) (1967.11.23 – 1977.09.02) |
| 1977.09.02 | Bishop emeritus of Kandy (Sri Lanka) (1936.01.27 – 1958.09.24) |
| 1977.09.25 | Bishop-Prelate emeritus of Pompei (Italy) (1951.05.08 – 1955) |
| 1977.09.29 | Bishop of Tiruvalla of the Syro-Malankara (India) (1955.01.27 – 1977.09.29) |
| 1977.10.01 | Auxiliary Bishop emeritus of Newark (USA) (1957.06.27 – 1972.04.17) |
| 1977.10.04 | Titular Archbishop of Thibiuca (1967.09.02 – 1977.10.04) Apostolic Pro-Nuncio to Japan (1974.01.10 – 1977.10.04) |
| 1977.10.07 | Auxiliary Bishop of Toronto (Canada) (1954.07.02 – 1977.10.07) |
| 1977.10.21 | Cardinal-Priest of Ss. Quattro Coronati (1946.02.22 – 1977.10.21) Metropolitan Archbishop emeritus of Sydney (Australia) (1940.03.08 – 1971.07.09) |
| 1977.10.21 | |
| 1977.11.09 | Bishop emeritus of San Severino (Italy) (1934.10.22 – 1966.10.05) |
| 1977.11.13 | Bishop emeritus of Townsville (Australia) (1938.07.13 – 1967.09.14) |
| 1977.11.22 | Cardinal-Bishop of Ostia (1974.01.07 – 1977.11.22) Cardinal-Bishop of Albano (1972.03.15 – 1977.11.22) Chancellor emeritus of Apostolic Chancery (1968.01.13 – 1973.02.07) |
| 1977.11.25 | Auxiliary Bishop emeritus of Paris (France) (1947.11.08 – 1966.12) |
| 1977.11.30 | |
| 1977.12.02 | |
| 1977.12.02 | Bishop emeritus of Fort-Rousset (Congo-Brazzaville) (1955.09.14 – 1968.03.02) |
| 1977.12.02 | Bishop emeritus of Ciudad Guzmán (Mexico) (1972.03.25 – 1977.07.07) |
| 1977.12.05 | |
| 1977.12.09 | Metropolitan Archbishop emeritus of Fermo (Italy) (1941.10.22 – 1976) |
| 1977.12.10 | |
| 1977.12.13 | |
| 1977.12.20 | Bishop emeritus of Namur (Belgium) (1941.12.12 – 1974.06.24) |
| 1977.12.20 | Bishop emeritus of Jabalpur (India) (1954.07.05 – 1965.12.17) |
| 1977.12.29 | Bishop emeritus of Hearst (Canada) (1946.02.22 – 1952.01.14) |
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