| 110431 | September 26 | Death | 1877 – Hermann Grassmann, German mathematician and physicist (b. 1809) |
| 110432 | September 26 | Death | 1902 – Levi Strauss, German-American businessman, founded Levi Strauss & Co. (b. 1829) |
| 110433 | September 26 | Death | 1904 – Lafcadio Hearn, Greek-Japanese author and academic (b. 1850) |
| 110434 | September 26 | Death | 1904 – John Fitzwilliam Stairs, Canadian businessman and politician (b. 1848) |
| 110435 | September 26 | Death | 1935 – Andy Adams, American author (b. 1859) |
| 110436 | September 26 | Death | 1935 – Iván Persa, Slovene-Hungarian priest and author (b. 1861) |
| 110437 | September 26 | Death | 1937 – Bessie Smith, American singer and actress (b. 1894) |
| 110438 | September 26 | Death | 1945 – Béla Bartók, Hungarian pianist and composer (b. 1881) |
| 110439 | September 26 | Death | 1946 – William Strunk, Jr., American author and educator (b. 1869) |
| 110440 | September 26 | Death | 1947 – Hugh Lofting, English-American author and poet (b. 1886) |
| 110441 | September 26 | Death | 1951 – Hans Cloos, German geologist and academic (b. 1885) |
| 110442 | September 26 | Death | 1952 – George Santayana, Spanish-American philosopher and author (b. 1863) |
| 110443 | September 26 | Death | 1953 – Xu Beihong, Chinese painter and educator (b. 1895) |
| 110444 | September 26 | Death | 1954 – Ellen Roosevelt, American tennis player (b. 1868) |
| 110445 | September 26 | Death | 1957 – Arthur Powell Davies, American minister and author (b. 1902) |
| 110446 | September 26 | Death | 1959 – S. W. R. D. Bandaranaike, Sri Lankan lawyer and politician, 4th Prime Minister of Sri Lanka (b. 1899) |
| 110447 | September 26 | Death | 1959 – Leslie Morshead, Australian general (b. 1889) |
| 110448 | September 26 | Death | 1959 – Teodor Ussisoo, Estonian furniture designer and educator (b. 1878) |
| 110449 | September 26 | Death | 1965 – James Fitzmaurice, Irish soldier and pilot (b. 1898) |
| 110450 | September 26 | Death | 1968 – Ben Shlomo Lipman-Heilprin, Polish-Israeli neurologist and physician (b. 1902) |
| 110451 | September 26 | Death | 1968 – Daniel Johnson, Sr., Canadian lawyer and politician, 20th Premier of Quebec (b. 1915) |
| 110452 | September 26 | Death | 1968 – Władysław Kędra, Polish pianist (b. 1918) |
| 110453 | September 26 | Death | 1972 – Charles Correll, American actor and screenwriter (b. 1890) |
| 110454 | September 26 | Death | 1973 – Samuel Flagg Bemis, American historian and author (b. 1891) |
| 110455 | September 26 | Death | 1973 – Ralph Earnhardt, American race car driver (b. 1923) |
| 110456 | September 26 | Death | 1973 – Anna Magnani, Italian actress and singer (b. 1908) |
| 110457 | September 26 | Death | 1976 – Leopold Ružička, Croatian-Swiss chemist and academic, Nobel Prize laureate (b. 1887) |
| 110458 | September 26 | Death | 1977 – Uday Shankar, Indian dancer and choreographer (b. 1900) |
| 110459 | September 26 | Death | 1978 – Manne Siegbahn, Swedish physicist and academic, Nobel Prize laureate (b. 1886) |
| 110460 | September 26 | Death | 1979 – Arthur Hunnicutt, American actor (b. 1910) |