| 9121 | January 21 | Death | 1683 – Anthony Ashley Cooper, 1st Earl of Shaftesbury, English politician Chancellor of the Exchequer (b. 1621) |
| 9122 | January 21 | Death | 1670 – Claude Duval, French highwayman (b. 1643) |
| 9123 | January 21 | Death | 1699 – Obadiah Walker, English historian and academic (b. 1616) |
| 9124 | January 21 | Death | 1706 – Adrien Baillet, French scholar and critic (b. 1649) |
| 9125 | January 21 | Death | 1710 – Johann Georg Gichtel, German mystic and critic (b. 1638) |
| 9126 | January 21 | Death | 1722 – Charles Paulet, 2nd Duke of Bolton, English politician Lord Lieutenant of Ireland (b. 1661) |
| 9127 | January 21 | Death | 1731 – Ignjat Đurđević, Croatian poet and translator (b. 1675) |
| 9128 | January 21 | Death | 1766 – James Quin, English actor (b. 1693) |
| 9129 | January 21 | Death | 1773 – Alexis Piron, French playwright and author (b. 1689) |
| 9130 | January 21 | Death | 1774 – Mustafa III, Ottoman sultan (b. 1717) |
| 9131 | January 21 | Death | 1775 – Yemelyan Pugachev, Russian rebel (b. 1742) |
| 9132 | January 21 | Death | 1793 – Louis XVI of France (b. 1754) |
| 9133 | January 21 | Death | 1795 – Samuel Wallis, English navigator and explorer (b. 1728) |
| 9134 | January 21 | Death | 1809 – Josiah Hornblower, American engineer and politician (b. 1729) |
| 9135 | January 21 | Death | 1814 – Jacques-Henri Bernardin de Saint-Pierre, French botanist and author (b. 1737) |
| 9136 | January 21 | Death | 1823 – Cayetano José Rodríguez, Argentinian cleric, journalist, and poet (b. 1761) |
| 9137 | January 21 | Death | 1831 – Ludwig Achim von Arnim, German poet and author (b. 1781) |
| 9138 | January 21 | Death | 1836 – Ferenc Novák Hungarian-Slovene priest and author (b. 1791) |
| 9139 | January 21 | Death | 1851 – Albert Lortzing, German actor and composer (b. 1801) |
| 9140 | January 21 | Death | 1862 – Božena Němcová, Austrian-Czech author (b. 1820) |
| 9141 | January 21 | Death | 1870 – Alexander Herzen, Russian philosopher and author (b. 1812) |
| 9142 | January 21 | Death | 1872 – Franz Grillparzer, Austrian playwright and poet (b. 1791) |
| 9143 | January 21 | Death | 1881 – Wilhelm Matthias Naeff, Swiss politician (b. 1802) |
| 9144 | January 21 | Death | 1891 – Calixa Lavallée, Canadian-American lieutenant and composer (b. 1842) |
| 9145 | January 21 | Death | 1901 – Elisha Gray, American engineer, co-founded Western Electric (b. 1835) |
| 9146 | January 21 | Death | 1914 – Theodor Kittelsen, Norwegian painter and illustrator (b. 1857) |
| 9147 | January 21 | Death | 1919 – Gojong of Korea (b. 1852) |
| 9148 | January 21 | Death | 1919 – Ahmed Muhtar Pasha, Ottoman general and politician 277th Grand Vizier of the Ottoman Empire (b. 1839) |
| 9149 | January 21 | Death | 1924 – Vladimir Lenin, Russian lawyer and politician (b. 1870) |
| 9150 | January 21 | Death | 1926 – Camillo Golgi, Italian physician and pathologist Nobel Prize laureate (b. 1843) |