| 117931 | October 15 | Event | 2005 – A riot in Toledo, Ohio breaks out during a National Socialist/Neo-Nazi protest over 100 are arrested. |
| 117932 | October 15 | Event | 2006 – Hawaii earthquake: A magnitude 6.7 earthquake rocks Hawaii, causing property damage, injuries, landslides, power outages, and the closure of Honolulu International Airport. |
| 117933 | October 15 | Event | 2007 – Seventeen activists in New Zealand are arrested in the country's first post 9/11 anti-terrorism raids. |
| 117934 | October 15 | Event | 2008 – The Dow Jones Industrial Average closes down 733.08 points, or 7.87%, the second worst day in the Dow's history based on a percentage drop. |
| 117935 | October 15 | Event | 2011 – Global protests break out in 120 cities in 48 countries. |
| 117936 | October 15 | Event | 2013 – A 7.2-magnitude earthquake strikes the Philippines, resulting in more than 215 deaths. |
| 117937 | October 15 | Birth | 70 BC – Virgil, Roman poet (d. 19 BC) |
| 117938 | October 15 | Birth | 1265 – Temür Khan, Emperor Chengzong of Yuan (d. 1307) |
| 117939 | October 15 | Birth | 1471 – Konrad Mutian, German epigrammatist and academic (d. 1526) |
| 117940 | October 15 | Birth | 1608 – Evangelista Torricelli, Italian physicist and mathematician (d. 1647) |
| 117941 | October 15 | Birth | 1686 – Allan Ramsay, Scottish poet and playwright (d. 1758) |
| 117942 | October 15 | Birth | 1701 – Marie-Marguerite d'Youville, Canadian nun and saint, founded Grey Nuns (d. 1771) |
| 117943 | October 15 | Birth | 1711 – Elisabeth Therese of Lorraine (d. 1741) |
| 117944 | October 15 | Birth | 1762 – Samuel Adams Holyoke, American composer and educator (d. 1820) |
| 117945 | October 15 | Birth | 1784 – Thomas Robert Bugeaud, French general and politician, Governor-General of Algeria (d. 1849) |
| 117946 | October 15 | Birth | 1785 – José Miguel Carrera, Chilean general and politician (d. 1821) |
| 117947 | October 15 | Birth | 1814 – Mikhail Lermontov, Russian author, poet, and painter (d. 1841) |
| 117948 | October 15 | Birth | 1818 – Alexander Dreyschock, Czech pianist and composer (d. 1869) |
| 117949 | October 15 | Birth | 1825 – Marie of Prussia (d. 1889) |
| 117950 | October 15 | Birth | 1829 – Asaph Hall, American astronomer and academic (d. 1907) |
| 117951 | October 15 | Birth | 1836 – James Tissot, French painter and illustrator (d. 1902) |
| 117952 | October 15 | Birth | 1840 – Honoré Mercier, Canadian journalist, lawyer, and politician, 9th Premier of Quebec (d. 1894) |
| 117953 | October 15 | Birth | 1844 – Friedrich Nietzsche, German composer, poet, and philosopher (d. 1900) |
| 117954 | October 15 | Birth | 1858 – John L. Sullivan, American boxer, actor, and journalist (d. 1918) |
| 117955 | October 15 | Birth | 1865 – Charles W. Clark, American singer and educator (d. 1925) |
| 117956 | October 15 | Birth | 1865 – Albert Heijn, Dutch businessman (d. 1945) |
| 117957 | October 15 | Birth | 1872 – Wilhelm Miklas, Austrian educator and politician, 3rd President of Austria (d. 1956) |
| 117958 | October 15 | Birth | 1872 – August Nilsson, Swedish pole vaulter, shot putter, and tug of war competitor (d. 1921) |
| 117959 | October 15 | Birth | 1874 – Alfred, Hereditary Prince of Saxe-Coburg and Gotha (d. 1899) |
| 117960 | October 15 | Birth | 1878 – Paul Reynaud, French lawyer and politician, 118th Prime Minister of France (d. 1966) |