| 111811 | September 30 | Event | 2005 – The controversial drawings of Muhammad are printed in the Danish newspaper Jyllands-Posten. |
| 111812 | September 30 | Event | 2009 – The 2009 Sumatra earthquakes occur, killing over 1,115 people. |
| 111813 | September 30 | Birth | 1207 – Rumi, Persian mystic and poet (d. 1273) |
| 111814 | September 30 | Birth | 1227 – Pope Nicholas IV (d. 1292) |
| 111815 | September 30 | Birth | 1530 – Girolamo Mercuriale, Italian philologist and physician (d. 1606) |
| 111816 | September 30 | Birth | 1550 – Michael Maestlin, German astronomer and mathematician (d. 1631) |
| 111817 | September 30 | Birth | 1689 – Jacques Aubert, French violinist and composer (d. 1753) |
| 111818 | September 30 | Birth | 1700 – Stanisław Konarski, Polish monk, poet, and playwright (d. 1773) |
| 111819 | September 30 | Birth | 1710 – John Russell, 4th Duke of Bedford, English politician, Lord President of the Council (d. 1771) |
| 111820 | September 30 | Birth | 1714 – Étienne Bonnot de Condillac, French epistemologist and philosopher (d. 1780) |
| 111821 | September 30 | Birth | 1732 – Jacques Necker, Swiss-French politician, Prime Minister of France (d. 1804) |
| 111822 | September 30 | Birth | 1743 – Christian Ehregott Weinlig, German cantor and composer (d. 1813) |
| 111823 | September 30 | Birth | 1760 – Michele Cachia, Maltese architect and engineer (d. 1839) |
| 111824 | September 30 | Birth | 1765 – José María Morelos, Mexican priest and general (d. 1815) |
| 111825 | September 30 | Birth | 1800 – Decimus Burton, English architect, designed the Pharos Lighthouse (d. 1881) |
| 111826 | September 30 | Birth | 1801 – Jerónimo Espejo, Argentinian general (d. 1889) |
| 111827 | September 30 | Birth | 1811 – Augusta of Saxe-Weimar-Eisenach (d. 1890) |
| 111828 | September 30 | Birth | 1813 – John Rae, Scottish physician and explorer (d. 1893) |
| 111829 | September 30 | Birth | 1827 – Ellis H. Roberts, American journalist and politician, 20th Treasurer of the United States (d. 1918) |
| 111830 | September 30 | Birth | 1832 – Ann Jarvis, American activist, co-founded Mother's Day (d. 1905) |
| 111831 | September 30 | Birth | 1836 – Remigio Morales Bermúdez, Peruvian politician, 56th President of Peru (d. 1894) |
| 111832 | September 30 | Birth | 1852 – Charles Villiers Stanford, Irish composer, conductor, and educator (d. 1924) |
| 111833 | September 30 | Birth | 1861 – William Wrigley, Jr., American businessman, founded Wrigley Company (d. 1932) |
| 111834 | September 30 | Birth | 1863 – Reinhard Scheer, German admiral (d. 1928) |
| 111835 | September 30 | Birth | 1870 – Thomas W. Lamont, American banker and philanthropist (d. 1948) |
| 111836 | September 30 | Birth | 1870 – Jean Baptiste Perrin, French-American physicist and chemist, Nobel Prize laureate (d. 1942) |
| 111837 | September 30 | Birth | 1882 – Hans Geiger, German physicist and academic (d. 1945) |
| 111838 | September 30 | Birth | 1883 – Bernhard Rust, German educator and politician (d. 1945) |
| 111839 | September 30 | Birth | 1887 – Lil Dagover, Indonesian-German actress (d. 1980) |
| 111840 | September 30 | Birth | 1893 – Lansdale Ghiselin Sasscer, American lieutenant, lawyer, and politician (d. 1964) |