- Apr 2 Bill Pickett, American rodeo performer (invented bulldogging), dies after being kicked in the head by a bronco at 61
- Apr 2 Hugo Kaun, German composer, dies at 69
- Apr 2 John Morrill, American baseball first baseman and manager (National League pennant: 1877, 78, 83; Boston Red Caps/Beaneaters), dies of pneumonia at 77
- Apr 4 Ottokar Czernin, Austro-Hungarian diplomat (Imperial Foreign Minister of Austria-Hungary) and politician, dies at 59
- Apr 4 Wilhelm Ostwald, Baltic German physical chemist (Nobel Prize for Chemistry 1909 for work on catalysis, chemical equilibria and reaction velocities), dies at 78 [1]
- Apr 7 Erv A Kelley, US policeman, shot to death by Pretty Boy Floyd
- Apr 10 André Baillon, Belgian-French author (& sabots), dies at 56
- Apr 17 Patrick Geddes, Scottish biologist and town planner who coined the term conurbation, dies at 77
- Apr 19 Władysław Rzepko, Polish composer, dies at 77
- Apr 20 Giuseppe Peano, Italian mathematician and glottologist, dies at 73
- Apr 26 Bill Lockwood, English cricket fast bowler (12 Tests, 43 wickets, BB 7/71, 1 x 50; Surrey CCC), dies at 64
- Apr 27 Hart Crane, American poet (The Bridge), commits suicide at 32 by jumping overboard into the Gulf of Mexico
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide