- Apr 10 Mikalojus Konstantinas Čiurlionis, Lithuanian composer (Miške (In the Forest); Jūra (The Sea)), art nouveau painter, and writer, dies died of pneumonia at 35
- Apr 13 George Washington Glick, American politician, dies at 83
- Apr 13 John McLane, American politician, dies at 59
- Apr 14 Addie Joss, American Baseball HOF pitcher (perfect game 1908; 2 x no-hitters 1908, 10; 1.89 career ERA second-lowest in MLB history; career WHIP 0.968 MLB record; Cleveland Bronchos), dies of TB at 31
- Apr 14 Henri Elzéar Taschereau, French Canadian jurist and Chief Justice of Canada (b. 1836)
- Apr 15 Georg Knorr, German engineer (brake system trains), dies at 51
- Apr 25 Emilio Salgari, Italian novelist (b. 1862)
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide