- Apr 1 Cosima Liszt, wife of Austrian composer Richard Wagner, dies at 92
- Apr 1 Zawditu, 1st reigning female monarch of Ethiopia, dies
- Apr 2 Zewditu, Empress of Ethiopia (1916-30), dies at 53
- Apr 3 Emma Albani, Canadian operatic soprano, dies at 82
- Apr 4 Vladimir Majakovski, Russian poet, dies
- Apr 14 Vladimir Mayakovsky, Russian poet (Ode to Revolution), dies at 36
- Apr 16 José Carlos Mariátegui, Peruvian journalist, political philosopher and activist (b. 1894)
- Apr 17 Alexander Golovin, Russian painter (b. 1863)
- Apr 19 Georges-Casimir Dessaulles, Canadian senator (b. 1827)
- Apr 21 Alex Smith, Scottish-American golfer (US Open 1906, 10), dies at 56
- Apr 21 Robert Bridges, English poet (Testament of beauty) and British Poet Laureate (1913-30), dies at 85
- Apr 22 Jeppe Aakjær, Danish poet & novelist (Bondens Søn), dies at 63
- Apr 24 Henry Ernest Dudeney, English mathematician and puzzle maker, dies at 73