- 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 Empress Zauditu of Ethiopia (b. 1876)
- Apr 3 Emma Albani, Canadian soprano (b. 1847)
- Apr 4 Vladimir Majakovski, Russian poet, dies
- Apr 14 Vladimir Mayakovsky, Russian poet, 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 Christine [Elizabeth C] Poolman, Dutch actress (Mother), dies at 79
- Apr 21 Robert Bridges, English poet (Testament of beauty) and British Poet Laureate (1913-30), dies at 85
- Apr 22 Jeppe Aakjaer, Danish poet (b. 1866)
- Apr 24 Henry Ernest Dudeney, English mathematician and puzzle maker, dies at 73