- Apr 2 Albert Marie Leon Adolphe de Bassompierre, Belgium ambassador to Tokyo (1921-39), dies at 82
- Apr 2 Chester Clute, American actor ("Arsenic and Old Lace"; "Too Many Girls"; "Niagara Falls"), dies of a heart attack at 65
- Apr 2 Philippo de Pisis, Italian painter and poet, dies at 59
- Apr 10 Bozidar Sirola, composer, dies at 66
- Apr 10 Clarence Beaumont, 1st batter in 1st World Series, dies at 75
- Apr 10 Jozef Szulc, Polish composer, dies at 81
- Apr 15 Emile Nolde [Hansen], German painter (Grablegung Christi), dies at 88
- Apr 18 Floyd Smith, American aviator and inventor of the modern parachute, dies at 71 [1]
- Apr 19 Ernst Robert Curtius, German literature historian, dies at 70
- Apr 19 Leon Junschlaeger, Dutch sailor, soldier, and head of military intelligence in Dutch Indonesia, dies after a series of strokes while on trial fighting charges of subversion at 52
- Apr 19 Lionel Crabb "Buster", British Royal Navy diver (WWII), disappears presumed dead on a job for M16 at 47
- Apr 20 Jaap Vranken, Dutch organist and composer (Stabat mater), dies at 59
- Apr 20 Lieven Duvosel, Flemish composer (De Leiecyclus - The Lys-cycle), dies at 78
- Apr 21 Charles MacArthur, American playwright and screenwriter (The Scoundrel), dies at 60
- Apr 24 Albrecht Alt, German theologist (Small Schriften), dies at 72
- Apr 24 Henry Stephenson, British actor (Conquest, Little Old NY, Mr Lucky), dies at 85
- Apr 26 Edward Arnold, American actor (Mr Smith Goes to Washington), dies at 66
- Apr 29 Nemesio Otaño, Spanish organist, choral director, educator, and composer (Basque Suite), dies at 75
- Apr 30 Alben W. Barkley, American politician (US Representative, Senator and 35th VP-D-1949-53), dies at 78
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide