| 30181 | March 18 | Birth | 1798 – Francis Lieber, German-American jurist and philosopher (d. 1872) |
| 30182 | March 18 | Birth | 1800 – Harriet Smithson, Anglo-Irish actress (d. 1854) |
| 30183 | March 18 | Birth | 1813 – Christian Friedrich Hebbel, German poet and playwright (d. 1864) |
| 30184 | March 18 | Birth | 1814 – Jacob Bunn, American businessman (d. 1897) |
| 30185 | March 18 | Birth | 1816 – Antonio Salviati, Italian lawyer and businessman (d. 1890) |
| 30186 | March 18 | Birth | 1823 – Antoine Chanzy, French general (d. 1883) |
| 30187 | March 18 | Birth | 1828 – Randal Cremer, English politician, Nobel Prize laureate (d. 1908) |
| 30188 | March 18 | Birth | 1837 – Grover Cleveland, American lawyer and politician, 22nd and 24th President of the United States (d. 1908) |
| 30189 | March 18 | Birth | 1840 – William Cosmo Monkhouse, English poet and critic (d. 1901) |
| 30190 | March 18 | Birth | 1842 – Stéphane Mallarmé, French poet and critic (d. 1898) |
| 30191 | March 18 | Birth | 1844 – Nikolai Rimsky-Korsakov, Russian composer and academic (d. 1908) |
| 30192 | March 18 | Birth | 1848 – Nathanael Greene Herreshoff, American engineer and architect (d. 1938) |
| 30193 | March 18 | Birth | 1848 – Princess Louise, Duchess of Argyll (d. 1939) |
| 30194 | March 18 | Birth | 1853 – Emilie Kempin-Spyri, Swiss lawyer and academic (d. 1901) |
| 30195 | March 18 | Birth | 1858 – Rudolf Diesel, German engineer, invented the Diesel engine (d. 1913) |
| 30196 | March 18 | Birth | 1863 – William Sulzer, American lawyer and politician, 39th Governor of New York (d. 1941) |
| 30197 | March 18 | Birth | 1869 – Neville Chamberlain, English businessman and politician, Prime Minister of the United Kingdom (d. 1940) |
| 30198 | March 18 | Birth | 1874 – Nikolai Berdyaev, Russian-French philosopher and theologian (d. 1948) |
| 30199 | March 18 | Birth | 1877 – Edgar Cayce, American mystic and psychic (d. 1945) |
| 30200 | March 18 | Birth | 1877 – Clem Hill, Australian cricketer and engineer (d. 1945) |
| 30201 | March 18 | Birth | 1878 – Percival Perry, 1st Baron Perry, English businessman (d. 1956) |
| 30202 | March 18 | Birth | 1879 – Norval Baptie, Canadian speed skater (d. 1966) |
| 30203 | March 18 | Birth | 1881 – Paul Le Flem, French composer and critic (d. 1984) |
| 30204 | March 18 | Birth | 1882 – Gian Francesco Malipiero, Italian composer and educator (d. 1973) |
| 30205 | March 18 | Birth | 1884 – Bernard Cronin, Australian author and journalist (d. 1968) |
| 30206 | March 18 | Birth | 1886 – Edward Everett Horton, American actor, dancer and singer (d. 1970) |
| 30207 | March 18 | Birth | 1890 – Henri Decoin, French director and screenwriter (d. 1969) |
| 30208 | March 18 | Birth | 1891 – Alice Cullen, Scottish politician (d. 1969) |
| 30209 | March 18 | Birth | 1893 – Costante Girardengo, Italian cyclist (d. 1978) |
| 30210 | March 18 | Birth | 1893 – Jean Goldkette, French-American pianist and bandleader (d. 1962) |