| 27601 | March 12 | Birth | 1821 – John Abbott, Canadian lawyer and politician, 3rd Prime Minister of Canada (d. 1893) |
| 27602 | March 12 | Birth | 1824 – Gustav Kirchhoff, Russian-German physicist and academic (d. 1887) |
| 27603 | March 12 | Birth | 1831 – Clement Studebaker, American businessman, co-founded Studebaker (d. 1901) |
| 27604 | March 12 | Birth | 1832 – Charles Boycott, English farmer and agent (d. 1897) |
| 27605 | March 12 | Birth | 1832 – Charles Friedel, French chemist and mineralogist (d.1899) |
| 27606 | March 12 | Birth | 1835 – Simon Newcomb, Canadian-American astronomer and mathematician (d. 1909) |
| 27607 | March 12 | Birth | 1837 – Alexandre Guilmant, French organist and composer (d. 1911) |
| 27608 | March 12 | Birth | 1838 – William Henry Perkin, English chemist and academic (d. 1907) |
| 27609 | March 12 | Birth | 1851 – Theodore Thurston Geer, American journalist and politician, 10th Governor of Oregon (d. 1924) |
| 27610 | March 12 | Birth | 1858 – Adolph Ochs, American publisher (d. 1935) |
| 27611 | March 12 | Birth | 1859 – Abraham H. Cannon, American religious leader (d. 1896) |
| 27612 | March 12 | Birth | 1860 – Eric Stenbock, Estonian poet and author (d. 1895) |
| 27613 | March 12 | Birth | 1861 – József Konkolics, Hungarian-Slovene cantor and author (d. 1941) |
| 27614 | March 12 | Birth | 1863 – Gabriele D'Annunzio, Italian soldier, journalist, poet, and playwright (d. 1938) |
| 27615 | March 12 | Birth | 1863 – Vladimir Vernadsky, Russian mineralogist and chemist (d. 1945) |
| 27616 | March 12 | Birth | 1864 – W. H. R. Rivers, English anthropologist, neurologist, ethnologist, and psychiatrist (d. 1922) |
| 27617 | March 12 | Birth | 1864 – Alice Tegnér, Swedish organist and composer (d. 1943) |
| 27618 | March 12 | Birth | 1864 – Charles Young, American colonel (d. 1922) |
| 27619 | March 12 | Birth | 1874 – Charles Weeghman, American businessman (d. 1938) |
| 27620 | March 12 | Birth | 1877 – Wilhelm Frick, German lawyer and politician, German Federal Minister of the Interior (d. 1946) |
| 27621 | March 12 | Birth | 1878 – Gemma Galgani, Italian mystic and saint (d. 1903) |
| 27622 | March 12 | Birth | 1880 – Henry Drysdale Dakin, English-American chemist and academic (d. 1952) |
| 27623 | March 12 | Birth | 1880 – Nikolaos Georgantas, Greek discus thrower (d. 1958) |
| 27624 | March 12 | Birth | 1880 – Jaan Soots, Estonian general and politician, 7th Estonian Minister of War (d. 1942) |
| 27625 | March 12 | Birth | 1881 – Gunnar Nordström, Finnish physicist and academic (d. 1923) |
| 27626 | March 12 | Birth | 1883 – Zoltán Meskó, Hungarian politician (d. 1959) |
| 27627 | March 12 | Birth | 1889 – Idris of Libya (d. 1983) |
| 27628 | March 12 | Birth | 1890 – Vaslav Nijinsky, Russian dancer and choreographer (d. 1950) |
| 27629 | March 12 | Birth | 1890 – William Dudley Pelley, American politician, founded the Silver Legion of America (d. 1965) |
| 27630 | March 12 | Birth | 1890 – Evert Taube, Swedish singer-songwriter and lute player (d. 1976) |