| 118171 | October 15 | Birth | 1989 – Leandro Antonio Martínez, Argentinian-Italian footballer |
| 118172 | October 15 | Birth | 1989 – Alen Pamić, Croatian footballer (d. 2013) |
| 118173 | October 15 | Birth | 1990 – Jeon Ji-yoon, South Korean singer-songwriter and dancer (4Minute and 2Yoon) |
| 118174 | October 15 | Birth | 1990 – Kiko Mizuhara, American-Japanese model, actress, and singer |
| 118175 | October 15 | Birth | 1992 – Vincent Martella, American actor and singer |
| 118176 | October 15 | Birth | 1994 – Stephen Arthurworrey, English footballer |
| 118177 | October 15 | Birth | 1995 – Billy Unger, American actor |
| 118178 | October 15 | Birth | 1996 – Zelo, South Korean rapper and dancer (B.A.P) |
| 118179 | October 15 | Birth | 1999 – Bailee Madison, American actress |
| 118180 | October 15 | Birth | 2005 – Prince Christian of Denmark |
| 118181 | October 15 | Death | 898 – Lambert of Italy (b. 880) |
| 118182 | October 15 | Death | 912 – Abdullah ibn Muhammad al-Umawi, Spanish emir (b. 844) |
| 118183 | October 15 | Death | 1080 – Rudolf of Rheinfelden (b. 1025) |
| 118184 | October 15 | Death | 1174 – Petronilla of Aragon (b. 1135) |
| 118185 | October 15 | Death | 1326 – Walter de Stapledon, English bishop and politician, Lord High Treasurer (b. 1261) |
| 118186 | October 15 | Death | 1389 – Pope Urban VI (b. 1318) |
| 118187 | October 15 | Death | 1564 – Andreas Vesalius, Belgian-Greek anatomist, physician, and author (b. 1514) |
| 118188 | October 15 | Death | 1690 – Juan de Valdés Leal, Spanish painter and illustrator (b. 1622) |
| 118189 | October 15 | Death | 1715 – Humphry Ditton, English mathematician and philosopher (b. 1675) |
| 118190 | October 15 | Death | 1788 – Samuel Greig, Scottish-Russian admiral (b. 1735) |
| 118191 | October 15 | Death | 1810 – Alfred Moore, American captain and judge (b. 1755) |
| 118192 | October 15 | Death | 1811 – Nathaniel Dance-Holland, English painter and politician (b. 1735) |
| 118193 | October 15 | Death | 1817 – Tadeusz Kościuszko, Polish-Lithuanian general and engineer (b. 1746) |
| 118194 | October 15 | Death | 1819 – Sergey Vyazmitinov, Russian general and politician, War Governor of Saint Petersburg (b. 1744) |
| 118195 | October 15 | Death | 1820 – Karl Philipp, Prince of Schwarzenberg (b. 1771) |
| 118196 | October 15 | Death | 1837 – Ivan Dmitriev, Russian poet and politician, Russian Minister of Justice (b. 1760) |
| 118197 | October 15 | Death | 1891 – Gilbert Arthur à Beckett, English author and songwriter (b. 1837) |
| 118198 | October 15 | Death | 1900 – Zdeněk Fibich, Czech pianist and composer (b. 1850) |
| 118199 | October 15 | Death | 1910 – Stanley Ketchel, American boxer (b. 1886) |
| 118200 | October 15 | Death | 1917 – Mata Hari, Dutch dancer (b. 1876) |