- Oct 1 Wilhelm Harteveld, Swedish composer, dies at 68
- Oct 2 Svante Arrhenius, Swedish chemist (1903 Nobel Prize for Chemistry), dies at 68
- Oct 8 Mary Webb, English writer (Gone to Earth), dies at 46
- Oct 10 Gustave Whitehead, German-born inventor (b. 1874)
- Oct 20 Mikhail Ivanov, Russian composer, dies at 78
- Oct 22 Borisav "Bora" Stanković, Serbian writer (b. 1876)
- Oct 22 Ross Youngs, American Baseball HOF right fielder (World Series 1921, 22; NY Giants), dies of Bright's disease at 30
- Oct 27 Joseph "Squizzy" Taylor, Australian gangster, dies of wounds following a gunfight with a rival gangster, John "Snowy" Cutmore, at 39
- Oct 28 (Joseph) Eaton Faning, British organist and composer (The Vikings; Mock Turtles), dies at 77
- Oct 29 Leonard Nelson, German philosopher (Nelson-Friessche Schule), dies at 45
- Oct 31 Elizabeth Harrison, American educator (National Congress of Parents & Teachers), dies at 78
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide