- Jun 2 Willem Roelofs, Dutch painter and cartoonist, dies at 66
- Jun 6 E. E. Clive, Welsh actor (Night Must Fall, Dark Hour), dies at 56
- Jun 7 James Hall, American actor (Hell's Angels, Four Sons), dies of cirrhosis at 39
- Jun 8 Frederick Converse, American composer (The Pipe of Desire), dies at 69
Marcus Garvey (1887-1940)
Jun 10 Jamaican-born black nationalist who began the back-to-Africa movement among US African Americans, dies at 52
- Jun 16 DuBose Heyward, American writer (Porgy, Star Spangled Virgin), dies at 54
- Jun 16 Vitezslava Kapralova, Czech composer and conductor, dies from typhoid fever at 25
- Jun 17 Arthur Harden, English biochemist (Nobel Prize 1929), dies at 74
- Jun 19 Maurice Jaubert, French composer and soldier, dies a few hours after being fatally wounded in action at 40
- Jun 20 Jehan Alain, French organist and composer, dies fighting for the French Army in WWII Battle of Saumur at 29
- Jun 21 Édouard Vuillard, French painter and graphic artist, dies at 71
- Jun 21 Hendrik Marsman, Dutch poet (Herinnering aan Holland - Remembrance of Holland; Vrees - Fear), drowns in the North Sea when cargo ship he was travelling on explodes at 40
- Jun 21 Smedley Butler, American Marine general, dies at 58
- Jun 21 Walter Hasenclever, German Expressionist writer, dies at 49
- Jun 22 Monty Noble, Australian cricket all-rounder (42 Tests, 1 x 100, HS 133, 121 wickets, BB 7/17; NSW), dies at 67
- Jun 22 Walter Hasenclever, German expressionist poet and playwright (Der Sohn), commits suicide while imprisoned in an internment camp in occupied France at 49
- Jun 22 Wladimir Köppen [Vladimir Köppen], German meteorologist and climatologist who developed the Köppen climate classification system for the regions of the world, dies at 93
- Jun 28 Italo Balbo, Italian pilot and governor of Libya, dies at 44
- Jun 29 Paul Klee, Swiss-German painter and educator at the Bauhaus, dies at 60
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide