- Mar 1 Alphonse MLP de Lamartine, French poet (History of Girondins), dies at 78
- Mar 11 Vladimir Odoevsky, Russian philosopher and writer, dies at 65
- Mar 19 Guillaume Nerenburger, Belgian general (Triangulatie of Belgium), dies at 64
- Mar 23 Charles Lucas, English composer and Principle of the Royal Academy of Music, dies at 60
- Mar 24 Antoine-Henri Jomini, French general (b. 1779)
- Mar 25 Edward Bates, American lawyer (26th U.S. Attorney General), dies at 75
- Mar 31 Allan Kardec, French author and founder of Spiritism, dies at 64
Assassination
Car Crash
Hanging
Killed in Action
Plane Crash
Poisoning