| 25531 | March 6 | Death | 1900 – Gottlieb Daimler, German businessman, co-founded Daimler-Motoren-Gesellschaft (b. 1834) |
| 25532 | March 6 | Death | 1905 – John Henninger Reagan, American surveyor, judge, and politician, 3rd Confederate States of America Secretary of the Treasury (b. 1818) |
| 25533 | March 6 | Death | 1917 – Valdemar Psilander Danish actor (b. 1884) |
| 25534 | March 6 | Death | 1919 – Oskars Kalpaks, Latvian colonel (b. 1882) |
| 25535 | March 6 | Death | 1920 – Ömer Seyfettin, Turkish author and educator (b. 1884) |
| 25536 | March 6 | Death | 1932 – John Philip Sousa, American conductor and composer (b. 1854) |
| 25537 | March 6 | Death | 1933 – Anton Cermak, Czech-American politician, 44th Mayor of Chicago (b. 1873) |
| 25538 | March 6 | Death | 1935 – Oliver Wendell Holmes, Jr., American colonel, lawyer, and jurist (b. 1841) |
| 25539 | March 6 | Death | 1935 – Fridolf Rhudin Swedish actor (b. 1895) |
| 25540 | March 6 | Death | 1939 – Ferdinand von Lindemann, German mathematician and academic (b. 1852) |
| 25541 | March 6 | Death | 1941 – Francis Aveling, Canadian psychologist and Roman Catholic priest (b. 1875) |
| 25542 | March 6 | Death | 1941 – Gutzon Borglum, Danish-American sculptor, designed Mount Rushmore (b. 1867) |
| 25543 | March 6 | Death | 1948 – Ross Lockridge, Jr., American author, poet, and academic (b. 1914) |
| 25544 | March 6 | Death | 1950 – Albert François Lebrun, French politician, 15th President of France (b. 1871) |
| 25545 | March 6 | Death | 1951 – Ivor Novello, Welsh singer-songwriter and actor (b. 1893) |
| 25546 | March 6 | Death | 1951 – Volodymyr Vynnychenko, Ukrainian playwright and politician, Prime Minister of Ukraine (b. 1880) |
| 25547 | March 6 | Death | 1952 – Jürgen Stroop, German SS officer (b. 1895) |
| 25548 | March 6 | Death | 1961 – George Formby, English singer-songwriter and actor (b. 1904) |
| 25549 | March 6 | Death | 1961 – Edgar Krahn, Estonian mathematician and academic (b. 1894) |
| 25550 | March 6 | Death | 1964 – Paul of Greece (b. 1901) |
| 25551 | March 6 | Death | 1965 – Margaret Dumont, American actress and singer (b. 1889) |
| 25552 | March 6 | Death | 1967 – John Haden Badley, English author and educator, founded the Bedales School (b. 1865) |
| 25553 | March 6 | Death | 1967 – Nelson Eddy, American actor and singer (b. 1901) |
| 25554 | March 6 | Death | 1967 – Zoltán Kodály, Hungarian composer, linguist, and philosopher (b. 1882) |
| 25555 | March 6 | Death | 1969 – Nadya Rusheva, Russian painter (b. 1952) |
| 25556 | March 6 | Death | 1970 – William Hopper, American actor (b. 1915) |
| 25557 | March 6 | Death | 1971 – Thurston Dart, English keyboard player and conductor (b. 1921) |
| 25558 | March 6 | Death | 1973 – Pearl S. Buck, American author and academic, Nobel Prize laureate (b. 1892) |
| 25559 | March 6 | Death | 1974 – Ernest Becker, American anthropologist and author (b. 1924) |
| 25560 | March 6 | Death | 1976 – Arapeta Awatere, New Zealand interpreter, military leader, maori welfare officer, politician, and murderer (b. 1910) |