- Oct 2 Benjamin Kidd, English sociologist (Social Evolution), dies of heart disease at 58
- Oct 16 Klaas/old stick Kater, christian worker's union leader, dies at 73
- Oct 21 Karl von Stürgkh, Austrian nobleman and politician (Prime Minister, 1911-16) who declared war on Serbia, initiating WWI, assassinated while having lunch at 56
- Oct 25 William Merritt Chase, American impressionist painter, and educator (Chase School, now known as the Parsons School of Design), dies at 66
- Oct 26 Klaas Kater, Dutch Christian Worker's Union Leader, dies at 83
- Oct 28 Cleveland Abbe, American meteorologist (Father of Weather Bureau), dies at 77
- Oct 28 Oswald Boelcke, German pilot (b. 1891)
- Oct 30 Silas Gamaliel Pratt, American composer (The Tragedy of the Deep), dies at 70
Charles Taze Russell (1852-1916)
Oct 31 American religious leader (founder of the Bible School Movement that led to Jehovah's Witnesses), dies at 64
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide