- Mar 5 Jacques Babinet, French physicist, mathematician and astronomer (contributions to optics), born in Lusignan, France (d. 1872)
- Mar 5 Robert Cooper Grier, Justice of the U.S. Supreme Court (d. 1870)
- Mar 16 Ami Boué, Austrian geologist (d. 1881)
- Mar 26 Julius Schnorr von Carolsfeld, German painter and designer who figured importantly in the German Nazarene movement, born in Leipzig, Saxony (d. 1872)
- Mar 31 Thompson McKennan, American politician who served as the 2nd United States Secretary of the Interior (d. 1852)