| Date of Death | Deceased Bishops (65) |
| 1930.01.03 | Bishop emeritus of Oppido Mamertina (Italy) (1927.08.26 – 1928.07.06) |
| 1930.01.18 | Vicar Apostolic of Bluefields (Nicaragua) (1913.12.10 – 1930.01.18) |
| 1930.01.23 | |
| 1930.02.01 | |
| 1930.02.09 | Bishop of Warmia (Poland) ([1908.11.26] 1909.04.12 – 1930.02.09) |
| 1930.02.22 | Cardinal-Deacon of S. Eustachio (1926.06.24 – 1930.02.22) Superior General of Congregation of the Missionaries of Saint Charles Borromeo (Scalabrinians) (1928 – 1930.02.22) Secretary of Sacred Consistorial Congregation (1928.11.01 – 1930.02.22) |
| 1930.02.25 | Vicar Apostolic of Shaozhou 韶州 (China) (1920.04.22 – 1930.02.25) |
| 1930.02.26 | Cardinal-Priest of S. Prassede (1903.11.12 – 1930.02.26) President of Sacred Congregation of the Reverend Basilica of Saint Peter (1914.01.12 – 1930.02.26) Archpriest of Papal Basilica of Saint Peter (1914.01.12 – 1930.02.26) Secretary of Supreme Sacred Congregation of the Holy Office (1914.10.14 – 1930.02.26) |
| 1930.03.09 | Vicar Apostolic of Fenyang 汾陽 (China) (1926.05.10 – 1930.03.09) |
| 1930.03.14 | |
| 1930.03.17 | |
| 1930.03.19 | Vicar Apostolic emeritus of Nyassa (Malawi) (1897.02.12 – 1911.02.24) |
| 1930.03.20 | Metropolitan Archbishop emeritus of Capua (Italy) (1913.03.04 – 1930.01.02) |
| 1930.03.22 | |
| 1930.03.24 | |
| 1930.04.04 | |
| 1930.04.05 | Bishop of Carcassonne (France) ([1902.05.13] 1902.06.09 – 1930.04.05) |
| 1930.04.05 | Bishop of Colle di Val d’Elsa (Italy) (1927.11.18 – 1930.04.05) |
| 1930.04.05 | Auxiliary Bishop of Córdoba (Argentina) (1914.05.25 – 1930.04.05) |
| 1930.04.11 | |
| 1930.04.18 | Cardinal-Priest of Ss. Bonifacio ed Alessio (1905.12.14 – 1930.04.18) Metropolitan Archbishop of São Sebastião do Rio de Janeiro (Brazil) (1897.08.31 – 1930.04.18) |
| 1930.04.18 | |
| 1930.04.18 | Titular Archbishop of Nicæa (1923.01.20 – 1930.04.18) |
| 1930.04.18 | Bishop of Senj–Modruš (Croatia) (1915.06.16 – 1930.04.18) |
| 1930.04.19 | Vicar Apostolic of Cirenaica (Libya) (1927.01.27 – 1930.04.19) |
| 1930.04.21 | Auxiliary Bishop of Milano (Italy) (1922.06.09 – 1930.04.21) |
| 1930.04.30 | |
| 1930.05.10 | Bishop of Fukuoka 福岡 (Japan) (1927.07.14 – 1930.05.10) |
| 1930.05.13 | |
| 1930.05.25 | Metropolitan Archbishop emeritus of Tokyo 東京 (Japan) (1912.06.01 – 1926.03.06) |
| 1930.05.28 | Cardinal-Priest of S. Maria Nuova (1907.12.19 – 1930.05.28) Metropolitan Archbishop of Reims (France) (1906.02.21 – 1930.05.28) |
| 1930.05.28 | Bishop of Sankt Gallen (Switzerland) ([1913.10.28] 1913.12.16 – 1930.05.28) |
| 1930.05.28 | |
| 1930.05.31 | Bishop of Augsburg (Germany) ([1902.03.18] 1902.06.09 – 1930.05.31) |
| 1930.06.03 | Bishop of Sandomierz (Poland) (1910.04.07 – 1930.06.03) |
| 1930.06.10 | Bishop of Conversano (Italy) (1918.03.14 – 1930.06.10) |
| 1930.07.08 | Bishop of Charlottetown (Canada) (1920.09.10 – 1930.07.08) |
| 1930.07.09 | Cardinal-Bishop of Ostia (1915.12.06 – 1930.07.09) Cardinal-Bishop of Palestrina (1900.04.19 – 1930.07.09) Prefect of Sacred Congregation of Ceremonies (1915.12.06 – 1930.07.09) Datary of His Holiness of Apostolic Dataria (1914.12.15 – 1930.07.09) Archpriest of Papal Basilica of Saint Mary Major (1896.12.16 – 1930.07.09) |
| 1930.07.09 | Bishop of Cuernavaca (Mexico) (1922.04.21 – 1930.07.09) |
| 1930.07.11 | Auxiliary Bishop of Westminster (England) (1917.10.30 – 1930.07.11) |
| 1930.07.14 | Bishop emeritus of Kumbakonam (India) (1913.05.21 – 1928.12.17) |
| 1930.07.14 | Bishop of San Luis Potosí (Mexico) (1922.02.24 – 1930.07.14) |
| 1930.07.16 | |
| 1930.07.23 | Bishop of Cerignola (Italy) (1915.02.19 – 1930.07.23) Bishop of Ascoli Satriano (Italy) (1915.02.19 – 1930.07.23) |
| 1930.08.04 | Metropolitan Archbishop of Milwaukee (USA) (1903.11.28 – 1930.08.04) |
| 1930.08.04 | Vicar Apostolic of Curaçao (Curaçao) (1910.06.10 – 1930.08.04) |
| 1930.08.06 | Bishop emeritus of Covington (USA) (1915.11.29 – 1923.03.12) |
| 1930.08.09 | |
| 1930.08.14 | |
| 1930.08.27 | |
| 1930.09.07 | Titular Archbishop of Tyrus (1921.03.10 – 1930.09.07) |
| 1930.09.12 | Auxiliary Bishop of Carthage (Tunisia) (1892.02.27 – 1930.09.12) |
| 1930.09.28 | Metropolitan Archbishop of Aix (France) (1920.07.09 – 1930.09.28) |
| 1930.10.04 | Bishop emeritus of São Tomé de Meliapor (India) (1887.03.14 – 1897.09.15) |
| 1930.10.07 | Vicar Apostolic of Norway (Norway) (1930.03.13 – 1930.10.07) |
| 1930.10.10 | Auxiliary Bishop of Praha (Czechia) (1917.07.07 – 1930.10.10) |
| 1930.10.16 | |
| 1930.10.23 | Cardinal-Priest of Ss. Vitale, Valeria, Gervasio e Protasio (1925.12.17 – 1930.10.23) Metropolitan Archbishop of Granada (Spain) (1921.03.07 – 1930.10.23) |
| 1930.10.30 | Bishop of Limburg (Germany) ([1913.01.22] 1913.06.04 – 1930.10.30) |
| 1930.11.07 | Cardinal-Priest of S. Maria della Vittoria (1922.12.14 – 1930.11.07) Metropolitan Archbishop of Rennes (France) (1921.09.22 – 1930.11.07) |
| 1930.11.07 | Cardinal-Priest of S. Maria degli Angeli (1915.12.09 – 1930.11.07) Metropolitan Archbishop of Firenze (Italy) (1899.06.19 – 1930.11.07) |
| 1930.11.13 | Archbishop emeritus of Baghdad (Iraq) (1887.11.24 – 1902.08.28) |
| 1930.11.21 | Vicar Apostolic of Goajira (Colombia) (1906.12.22 – 1930.11.21) |
| 1930.11.23 | |
| 1930.11.29 | Metropolitan Archbishop of Saint Paul (USA) (1919.01.31 – 1930.11.29) |
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