- Apr 1 Božidar Kunc, Croatian composer, dies at 60
- Apr 2 Josef Klaus, Chancellor of Austria (1966-70), dies at 90
Douglas MacArthur
Apr 5 Douglas MacArthur, US general (Pacific theater-WW II), dies at 84
Douglas MacArthur
Rachel Carson
Apr 14 Rachel Carson, American marine biologist, conservationist and author (Silent Spring), dies at 56
Rachel Carson
- Apr 14 Tatyana Afanasyeva, Russian-Dutch mathematician and physicist (fields of statistical mechanics and statistical thermodynamics), dies at 87
- Apr 18 Albe Vidaković, Croatian composer, dies at 49
- Apr 18 Ben Hecht, American playwright (Child of the Century), dies at 71
- Apr 19 Cyril Merry, Trinidadian cricketer (WI batsman in 2 Tests 1933), dies at 53
- Apr 20 Eddie Dyer, American baseball player, dies at 64
- Apr 24 Gerhard Domagk, German bacteriologist (Nobel Prize 1939 in Physiology or Medicine - first commercially available antibiotic and marketed under the brand name Prontosil), dies at 68
- Apr 26 Edwin John Pratt, Canadian poet (Towards the Last Spike), dies at 81
- Apr 26 Pieter van der Lijn, Dutch geologist (Boulder Book), dies at 93
- Apr 27 Georg Britting, German poet, dies at 73
- Apr 28 Rolf de Maré, Swedish art collector & museum director, dies at 75
- Apr 29 Albert Saverys, Flemish painter, dies at 77