- Apr 2 Nathan Birnbaum, Austrian writer (Gottes Volk;; Der Ruf), and philosopher (early Zionist, later anti-Zionist), dies at 72
- Apr 4 Frantisek X Salda, Czech writer/critic, dies at 69
- Apr 8 Arthur Foote, American classical organist, composer, and member of the "Boston Six" (Suite for Strings in E), dies at 84
- Apr 8 William Henry Hadow, British educational reformer and musicologist (Oxford History of Music, Studies in Modern Music), dies at 77
- Apr 10 Algernon Ashton, British composer, dies at 77
- Apr 15 Ned Hanlon, American Baseball HOF center fielder (NL pennant 1887 Detroit Wolverines) and manager (5 × NL pennant Baltimore Orioles, Brooklyn Superbas), dies at 79
- Apr 15 Nikolai Artzibushev, Russian jurist and composer, dies at 79
- Apr 17 Yi Sang, Korean author and poet (Dying Words, Wings, Child’s Bone), dies of tuberculosis in a Japanese prison camp at 26
- Apr 19 William Conway, 1st Baron Conway of Allington, English historian and explorer (Spitzbergen), dies at 81
- Apr 25 Clem Sohn, air show performer dies at 26 when his chute fails to open
- Apr 25 Michał Drzymała, Polish peasant rebel (Drzymała's wagon), dies at 79
Antonio Gramsci (1891-1937)
Apr 27 Italian philosopher and Marxist theorist, dies at 46
- Apr 29 Wallace Carothers, American chemist and inventor (nylon), commits suicide at 41
- Apr 29 William Gillette, American stage and silent film actor (Sherlock Holmes), and playwright (Secret Service), dies at 83
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide