- Apr 1 Gabrielle Petit, Belgian resistance fighter, executed
- Apr 9 Vicente Goicoechea Errasti, Basque composer, dies at 62
- Apr 11 Richard Harding Davis, American journalist and author (Soldiers of Fortune, The King's Jackal), dies of a heart attack at 52
- Apr 15 Alfred Cogniaux, Belgian botanist, dies at 75
- Apr 16 Tom Horan, Australian cricket all-rounder (15 Tests, 1 x 100, 11 wickets; Victoria CA), dies a 62
- Apr 19 Ephraim Shay, American inventor of Shay type of geared steam locomotive, dies at 76
- Apr 29 Jørgen Pedersen Gram, Danish mathematician (Gram-Schmidt process), dies at 65