| 27871 | March 12 | Death | 1872 – Zeng Guofan, Chinese general and politician, Viceroy of Liangjiang (b. 1811) |
| 27872 | March 12 | Death | 1894 – Illarion Pryanishnikov, Russian painter (b. 1840) |
| 27873 | March 12 | Death | 1898 – Zachris Topelius, Finnish-Swedish journalist, historian, and author (b. 1818) |
| 27874 | March 12 | Death | 1909 – Joseph Petrosino, American police officer (b. 1860) |
| 27875 | March 12 | Death | 1914 – George Westinghouse, American engineer and businessman (b. 1846) |
| 27876 | March 12 | Death | 1916 – Marie von Ebner-Eschenbach, Austrian author (b. 1830) |
| 27877 | March 12 | Death | 1925 – Gergely Luthár, Slovenian-Hungarian author (b. 1841) |
| 27878 | March 12 | Death | 1925 – Sun Yat-sen, Chinese physician and politician, 1st President of the Republic of China (b. 1866) |
| 27879 | March 12 | Death | 1929 – Asa Griggs Candler, American businessman and politician, 44th Mayor of Atlanta (b. 1851) |
| 27880 | March 12 | Death | 1929 – William Turner Dannat, American painter (b. 1853) |
| 27881 | March 12 | Death | 1930 – William George Barker, Canadian colonel and pilot, Victoria Cross recipient (b. 1894) |
| 27882 | March 12 | Death | 1930 – Alois Jirásek, Czech author and playwright (b. 1851) |
| 27883 | March 12 | Death | 1935 – Mihajlo Pupin, Serbian-American physicist and chemist (b. 1858) |
| 27884 | March 12 | Death | 1937 – Jenő Hubay, Hungarian violinist and composer (b. 1858) |
| 27885 | March 12 | Death | 1937 – Charles-Marie Widor, French organist and composer (b. 1844) |
| 27886 | March 12 | Death | 1942 – Robert Bosch, German engineer and businessman, founded Robert Bosch GmbH (b. 1861) |
| 27887 | March 12 | Death | 1942 – William Henry Bragg, English physicist, chemist, and mathematician, Nobel Prize laureate (b. 1862) |
| 27888 | March 12 | Death | 1943 – Gustav Vigeland, Norwegian sculptor (b. 1869) |
| 27889 | March 12 | Death | 1945 – Friedrich Fromm, German general (b. 1861) |
| 27890 | March 12 | Death | 1946 – Ferenc Szálasi, Hungarian soldier and politician, Head of State of Hungary (b. 1897) |
| 27891 | March 12 | Death | 1947 – Winston Churchill, American author and playwright (b. 1871) |
| 27892 | March 12 | Death | 1955 – Charlie Parker, American saxophonist and composer (b. 1920) |
| 27893 | March 12 | Death | 1960 – Kshitimohan Sen, Indian historian, author, and academic (b. 1880) |
| 27894 | March 12 | Death | 1963 – Arthur Grimsdell, English footballer and cricketer (b. 1894) |
| 27895 | March 12 | Death | 1971 – August Torma, Estonian soldier and diplomat (b. 1895) |
| 27896 | March 12 | Death | 1973 – Frankie Frisch, American baseball player and manager (b. 1898) |
| 27897 | March 12 | Death | 1974 – George D. Sax, American banker and businessman (b. 1904) |
| 27898 | March 12 | Death | 1975 – Olga Hepnarová, Czech murderer (b. 1951) |
| 27899 | March 12 | Death | 1978 – John Cazale, American actor (b. 1935) |
| 27900 | March 12 | Death | 1978 – Gene Moore, American baseball player (b. 1909) |