- Apr 4 Franz Anton von Kolowrat-Liebsteinsky, Bohemian and Austrian statesman (Minister-President of Austria 1848), dies at 83
- Apr 4 John McLean, American jurist (US Supreme Court Justice, 1829-61; Ohio Supreme Court Justice (1816-22) and US Postmaster General (1823-28), dies at 76
Elisha Otis (1811-1861)
Apr 8 American founder of the Otis Elevator Company and inventor of a safety device that prevents elevators from falling if the hoisting cable fails, dies of diphtheria at 50
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide