| 119401 | October 18 | Death | 1871 – Charles Babbage, English mathematician and engineer, invented the mechanical computer (b. 1791) |
| 119402 | October 18 | Death | 1886 – Philipp Franz von Siebold, German physician and botanist (b. 1796) |
| 119403 | October 18 | Death | 1889 – Antonio Meucci, Italian-American engineer (b. 1808) |
| 119404 | October 18 | Death | 1892 – William W. Chapman, American lawyer and politician (b. 1808) |
| 119405 | October 18 | Death | 1893 – Charles Gounod, French composer and educator (b. 1818) |
| 119406 | October 18 | Death | 1908 – Nozu Michitsura, Japanese field marshal (b. 1840) |
| 119407 | October 18 | Death | 1911 – Alfred Binet, French psychologist and author (b. 1857) |
| 119408 | October 18 | Death | 1921 – Ludwig III of Bavaria (b. 1845) |
| 119409 | October 18 | Death | 1931 – Thomas Edison, American engineer and businessman, invented the light bulb and phonograph (b. 1847) |
| 119410 | October 18 | Death | 1934 – Santiago Ramón y Cajal, Spanish pathologist, histologist, and neuroscientist, Nobel Prize laureate (b. 1852) |
| 119411 | October 18 | Death | 1935 – Gaston Lachaise, French-American sculptor (b. 1882) |
| 119412 | October 18 | Death | 1941 – Manuel Teixeira Gomes, Portuguese lawyer and politician, 7th President of Portugal (b. 1860) |
| 119413 | October 18 | Death | 1942 – Mikhail Nesterov, Russian painter (b. 1862) |
| 119414 | October 18 | Death | 1947 – Michiaki Kamada, Japanese admiral (b. 1890) |
| 119415 | October 18 | Death | 1948 – Walther von Brauchitsch, German field marshal (b. 1881) |
| 119416 | October 18 | Death | 1956 – Yoshio Markino, Japanese painter and author (b. 1869) |
| 119417 | October 18 | Death | 1959 – Boughera El Ouafi, Algerian-French runner (b. 1898) |
| 119418 | October 18 | Death | 1961 – Tsuru Aoki, Japanese-American actress (b. 1892) |
| 119419 | October 18 | Death | 1962 – Iván Petrovich, Serbian-German actor and singer (b. 1894) |
| 119420 | October 18 | Death | 1965 – Lauri Törni, Finnish-American captain (b. 1919) |
| 119421 | October 18 | Death | 1965 – Henry Travers, English-American actor (b. 1874) |
| 119422 | October 18 | Death | 1966 – Elizabeth Arden, Canadian-American businesswoman, founded Elizabeth Arden, Inc. (b. 1878) |
| 119423 | October 18 | Death | 1966 – S. S. Kresge, American businessman, founded Kmart (b. 1867) |
| 119424 | October 18 | Death | 1973 – Margaret Caroline Anderson, American publisher, founded The Little Review (b. 1886) |
| 119425 | October 18 | Death | 1973 – Walt Kelly, American illustrator and animator (b. 1913) |
| 119426 | October 18 | Death | 1973 – Leo Strauss, German-American political scientist, philosopher, and academic (b. 1899) |
| 119427 | October 18 | Death | 1975 – Al Lettieri, American actor (b. 1928) |
| 119428 | October 18 | Death | 1976 – Viswanatha Satyanarayana, Indian poet and author (b. 1895) |
| 119429 | October 18 | Death | 1977 – Andreas Baader, German militant (b. 1943) |
| 119430 | October 18 | Death | 1977 – Gudrun Ensslin, German militant leader, founded the Red Army Faction (b. 1940) |