- Oct 4 Jimmy 'Nixey' Callahan, American baseball pitcher, outfielder and manager (Chicago White Sox; first AL no-hitter 1902), dies at 60
- Oct 5 Jean Vigo, French actor and director (Zero For Conduct, L'Atlante), dies of complications from tuberculosis at 29
- Oct 9 Alexander I, Serbian monarch (King of the Kingdom of Serbs, Croats, and Slovenes, 1921–29; King of Yugoslavia, 1929–34), assassinated by a Croatian nationalist at 45
- Oct 9 J-Louis-F Barthou, French writer, French Premier and Foreign Minister, assassinated by a Croatian nationalist at 72
- Oct 12 Gertrude Käsebier, American pioneering photographer, dies at 82
Raymond Poincaré (1860-1934)
Oct 15 French President (1913-20) and three time Prime Minister (1912-13, 1922-24, 1926-29), dies at 74
- Oct 17 Santiago Ramón y Cajal, Spanish histologist (central nervous system) and neuroscientist (Nobel Prize in Physiology or Medicine 1906), dies at 82
Pretty Boy Floyd (1904-1934)
Oct 22 American gangster and FBI Most Wanted criminal, shot dead at 30 by the FBI in Ohio
Assassination
Drug Overdose
Gunshot Wound
Murder
Plane Crash
Suicide