| 38911 | April 4 | Death | 1929 – Karl Benz, German engineer and businessman, founded Mercedes-Benz (b. 1844) |
| 38912 | April 4 | Death | 1931 – André Michelin, French businessman, co-founded the Michelin Tyre Company (b. 1853) |
| 38913 | April 4 | Death | 1932 – Wilhelm Ostwald, Latvian-German chemist and academic, Nobel Prize laureate (b. 1853) |
| 38914 | April 4 | Death | 1933 – Elizabeth Bacon Custer, American author and educator (b. 1842) |
| 38915 | April 4 | Death | 1940 – Gustav Goßler, German rower (b. 1879) |
| 38916 | April 4 | Death | 1951 – George Albert Smith, American religious leader, 8th President of The Church of Jesus Christ of Latter-day Saints (b. 1870) |
| 38917 | April 4 | Death | 1953 – Carol II of Romania (b. 1893) |
| 38918 | April 4 | Death | 1957 – E. Herbert Norman, Canadian historian and diplomat (b. 1909) |
| 38919 | April 4 | Death | 1958 – Johnny Stompanato, American soldier and bodyguard (b. 1925) |
| 38920 | April 4 | Death | 1961 – Harald Riipalu, Estonian military commander (b. 1912) |
| 38921 | April 4 | Death | 1961 – Simion Stoilow, Romanian mathematician and academic (b. 1873) |
| 38922 | April 4 | Death | 1962 – James Hanratty, English murderer (b. 1936) |
| 38923 | April 4 | Death | 1967 – Al Lewis, American songwriter (b. 1901) |
| 38924 | April 4 | Death | 1967 – Héctor Scarone, Uruguayan footballer and manager (b. 1898) |
| 38925 | April 4 | Death | 1968 – Martin Luther King Jr., American minister and activist, Nobel Prize laureate (b. 1929) |
| 38926 | April 4 | Death | 1970 – Byron Foulger, American actor (b. 1899) |
| 38927 | April 4 | Death | 1972 – Adam Clayton Powell, Jr., American pastor and politician (b. 1908) |
| 38928 | April 4 | Death | 1972 – Stefan Wolpe, German-American composer and academic (b. 1902) |
| 38929 | April 4 | Death | 1976 – Harry Nyquist, Swedish engineer and theorist (b. 1889) |
| 38930 | April 4 | Death | 1977 – Andrey Dikiy, Ukrainian-American journalist, historian, and politician (b. 1893) |
| 38931 | April 4 | Death | 1979 – Zulfikar Ali Bhutto, Pakistani lawyer and politician, 4th President of Pakistan (b. 1928) |
| 38932 | April 4 | Death | 1979 – Edgar Buchanan, American actor and singer (b. 1903) |
| 38933 | April 4 | Death | 1980 – Red Sovine, American singer-songwriter and guitarist (b. 1917) |
| 38934 | April 4 | Death | 1983 – Gloria Swanson, American actress, singer, and producer (b. 1899) |
| 38935 | April 4 | Death | 1983 – Bernard Vukas, Croatian football player, played for 1953 FIFA's "Rest of the World" team against England at Wembley (b. 1927) |
| 38936 | April 4 | Death | 1984 – Oleg Antonov, Russian-Ukrainian engineer and businessman, founded Antonov (b. 1906) |
| 38937 | April 4 | Death | 1985 – Kate Roberts, Welsh author and activist (b. 1891) |
| 38938 | April 4 | Death | 1987 – C. L. Moore, American author and academic (b. 1911) |
| 38939 | April 4 | Death | 1987 – Chögyam Trungpa, Tibetan guru, poet, and scholar (b. 1939) |
| 38940 | April 4 | Death | 1987 – Sachchidananda Vatsyayan, Indian journalist and author (b. 1911) |