| 109141 | September 23 | Death | 1789 – John Rogers, American lawyer and politician (b. 1723) |
| 109142 | September 23 | Death | 1830 – Elizabeth Monroe, American wife of James Monroe, 5th First Lady of the United States (b. 1768) |
| 109143 | September 23 | Death | 1835 – Vincenzo Bellini, Italian composer (b. 1801) |
| 109144 | September 23 | Death | 1851 – Émilie Gamelin, Canadian nun, founded the Sisters of Providence (b. 1800) |
| 109145 | September 23 | Death | 1846 – John Ainsworth Horrocks, English-Australian explorer (b. 1818) |
| 109146 | September 23 | Death | 1850 – José Gervasio Artigas, Uruguayan general and politician (b. 1764) |
| 109147 | September 23 | Death | 1867 – Michael O'Laughlen, American conspirator (b. 1840) |
| 109148 | September 23 | Death | 1870 – Prosper Mérimée, French archaeologist and historian (b. 1803) |
| 109149 | September 23 | Death | 1871 – Louis-Joseph Papineau, Canadian lawyer and politician (b. 1786) |
| 109150 | September 23 | Death | 1873 – Jean Chacornac, French astronomer (b. 1823) |
| 109151 | September 23 | Death | 1877 – Urbain Le Verrier, French mathematician and astronomer (b. 1811) |
| 109152 | September 23 | Death | 1889 – Wilkie Collins, English author and playwright (b. 1824) |
| 109153 | September 23 | Death | 1900 – William Marsh Rice, American businessman, founded Rice University (b. 1816) |
| 109154 | September 23 | Death | 1913 – Donato Álvarez, Argentinian general (b. 1825) |
| 109155 | September 23 | Death | 1917 – Werner Voss, German lieutenant and pilot (b. 1897) |
| 109156 | September 23 | Death | 1929 – Richard Adolf Zsigmondy, Austrian-German chemist, physicist, and academic, Nobel Prize laureate (b. 1865) |
| 109157 | September 23 | Death | 1939 – Sigmund Freud, Austrian neurologist and psychiatrist (b. 1856) |
| 109158 | September 23 | Death | 1940 – Hale Holden, American businessman (b. 1869) |
| 109159 | September 23 | Death | 1943 – Salvo D'Acquisto, Italian soldier (b. 1920) |
| 109160 | September 23 | Death | 1943 – Elinor Glyn, English author, screenwriter, and producer (b. 1864) |
| 109161 | September 23 | Death | 1944 – Jakob Schaffner, Swiss author and critic (b. 1875) |
| 109162 | September 23 | Death | 1950 – Sam Barry, American basketball player and coach (b. 1892) |
| 109163 | September 23 | Death | 1951 – Yörük Ali Efe, Turkish warlord (b. 1895) |
| 109164 | September 23 | Death | 1958 – Jacob Nicol, Canadian publisher, lawyer, and politician (b. 1876) |
| 109165 | September 23 | Death | 1967 – Stanislaus Zbyszko, Polish wrestler and strongman (b. 1879) |
| 109166 | September 23 | Death | 1968 – Pio of Pietrelcina, Italian priest and saint (b. 1887) |
| 109167 | September 23 | Death | 1970 – Bourvil, French actor and singer (b. 1917) |
| 109168 | September 23 | Death | 1971 – James Waddell Alexander II, American mathematician and topologist (b. 1888) |
| 109169 | September 23 | Death | 1971 – Billy Gilbert, American actor and singer (b. 1894) |
| 109170 | September 23 | Death | 1973 – Pablo Neruda, Chilean poet and diplomat, Nobel Prize laureate (b. 1904) |