- Mar 5 David Scott, Scottish painter (b. 1806)
- Mar 15 Giuseppe Caspar Mezzofanti, Italian cardinal, linguist and hyperpolyglot (understood 70 languages), dies at 74
- Mar 17 William II, King of the Netherlands, Grand Duke of Luxembourg, and Duke of Limburg, dies at 56
- Mar 27 Archibald Acheson, 2nd Earl of Gosford (b. 1776)
- Mar 28 Stephan Endlicher, Austrian botanist, dies at 44