Benito Mussolini
- Oct 2 NY Hayden Planetarium, 4th in US, opens
- Oct 3 Italy invades Ethiopia, starting the Second Italo-Ethiopian War
- Oct 6 Italian army occupies Adua Abyssinia
- Oct 6 Market Street Railway, San Francisco, starts using trackless trolley coaches
- Oct 7 Detroit Tigers beat Chicago Cubs, 4 games to 2 in 32nd World Series
Heinrich Himmler
- Oct 10 Coup under Gen Giorgios Kondylis in favor of Greek monarchy
- Oct 10 George Gershwin's "Porgy & Bess" opens on Broadway NY
- Oct 10 League of Nations denounces Italian invasion of Abyssinia
- Oct 12 Cole Porters musical "Jubilee" premieres in NYC
- Oct 15 NHL's St Louis Eagles fold
- Oct 17 Pacific Association of AAU votes not to participate in Berlin Olympics
Event of Interest
Oct 19 Mao Zedong's army reaches Shanxi
Mao Zedong
Event of Interest
Oct 20 Hank Greenberg is named AL MVP by the BBWAA, Wes Ferrell is runner-up
Hank Greenberg
- Oct 20 Communist forces end their Long March at Yan'an, in Shaanxi, China, bringing Mao Zedong to prominence
- Oct 21 Hank Greenberg selected AL MVP unanimously
- Oct 22 18th PGA Championship: Johnny Revolta at Twin Hills CC Oklahoma City
- Oct 22 Establishment of the rank of Marshal of the Soviet Union
- Oct 23 Gabby Hartnett selected NL MVP
- Oct 23 Johnny Revolta wins PGA golf tournament
- Oct 23 Dutch Schultz, Abe Landau, Otto Berman, and Bernard "Lulu" Rosencrantz are fatally shot at a saloon in Newark, New Jersey in what will become known as The Chophouse Massacre.
Election of Interest
Oct 23 Mackenzie King is elected as Prime Minister of Canada for the third time
Mackenzie King
- Oct 24 Judge Landis fines umpire George Moriarty, Cubs manager Charlie Grimm & Chicago players W English, B Jurges & B Herman for actions in World Series
- Oct 25 Hurricane-produced floods kill 2,000 in Jeremie & Jacmel Haiti
- Oct 27 SDAP & NVV launchs "Plan for Work" in Utrect Netherlands
- Oct 28 Sidney Kingsley's "Dead End" premieres in NYC