- Oct 2 Pitching in his 3rd start in 5 days, Philadelphia Phillies right hander Grover Cleveland Alexander records his 20th century MLB record 16th shutout of year, a 2-0 win v Boston Braves
- Oct 2 Zoological Society of San Diego founded, in San Diego, California
- Oct 4 Market Street's "Path of Gold" lit for 1st time
Battle of the Somme
Oct 5 Adolf Hitler is wounded in the left thigh by an exploding shell during the Battle of the Somme
Georgia Tech Crushes Cumberland 222-0
Oct 7 Georgia Tech, coached by John Heisman, defeats Cumberland, 222-0; most lopsided score in the history of US college football
- Oct 7 The German submarine U-53 arrives off Newport, Rhode Island, and sinks 9 British merchant ships in international waters
- Oct 10 In Game 3, Charlie Ebbets becomes the 1st owner to raise the price of World Series grandstand seats to $5-up from $3
- Oct 12 Baseball World Series: Boston Red Sox beat Brooklyn Robins, 4-1 at Braves Field to clinch series, 4-1 and retain title
1st PGA Championship
Oct 14 1st PGA Championship Men's Golf, Siwanoy CC, Bronxville, NY: Englishman Jim Barnes defeats Jock Hutchison by 1 hole in the 36-hole final
Paul Robeson Excluded
Oct 14 Sophomore tackle and guard Paul Robeson is excluded from the Rutgers football team when Washington and Lee University refused to play against a black person.
- Oct 14 The Perm State University was founded in Russia.
1st Birth Control Clinic
Oct 16 Margaret Sanger opens 1st birth control clinic in the US at 46 Amboy St, Brooklyn
Lawrence's Royal Meeting
Oct 16 T. E. Lawrence (of Arabia) meets with Faisal I of Iraq
- Oct 17 Dutch women demonstrate for female suffrage
Crete Government Recognized
Oct 19 France extends formal recognition of the Provisional Government in Crete proclaimed Eleftherios Venizelos
How Long Must Women Wait?
Oct 22 Suffragette Inez Milholland collapses during a speech in Los Angeles, California and dies weeks later. Her last word's are to President Woodrow Wilson “Mr. President, how long must women wait for liberty?”
- Oct 24 Moroccan troops capture Ft Douaumont
- Oct 26 American sex educator Margaret Sanger arrested for obscenity (advocating birth control)
- Oct 27 Battle of Segale: Negus Mikael, marching on the Ethiopian capital in support of his son Emperor Iyasus V, is defeated by Fitawrari abte Giyorgis, securing the throne for Empress Zauditu.
- Oct 28 Australian government holds a national referendum seeking support for the proposal of compulsory conscription; it is rejected
- Oct 31 Clare Kummer's play "Good Gracious Annabelle" premieres in NYC
Admirals
Aviators
Gangsters
Generals
Industrialists
Suffragists