- Sep 1 NYC Mayor James J "Gentleman Jimmy" Walker resigns (graft charges)
Jimmie Foxx Hits #51
Sep 3 A's first baseman Jimmie Foxx smashes his 50th & 51st home runs to become only 3rd player to reach 50 in a MLB season; joins Babe Ruth & Hack Wilson
- Sep 4 PGA Championship Men's Golf, Keller GC: Olin Dutra wins the first of 2 major titles, beating Frank Walsh, 4 & 3
- Sep 5 The French Upper Volta is broken apart between Ivory Coast, French Sudan, and Niger
- Sep 7 Earl Grace, ends NL catcher record streak of 110 cons errorless games
- Sep 9 Frank Crosetti ties record, striking out twice in 1 inning
- Sep 9 Mine strikes at Belgian Borinage ends
- Sep 9 Spanish Cortes grants Catalonia autonomy
- Sep 9 Steamboat SS Observation explodes in NYC East River with 71 killed
- Sep 10 Dodgers' Johnny Frederick hits record 6th pinch-hit HR of the season
- Sep 10 Independent City Owned Rapid Transit Railroad (IND) opens in NYC
US Men's Tennis Open
Sep 10 US National Championship Men's Tennis, Forest Hills: American Ellsworth Vines successfully defends his title; beats Frenchman Henri Cochet 6–4, 6–4, 6–4
- Sep 11 Polish aviators Franciszek Żwirko (36) and Stanisław Wigura (31), international 'Challenge 1932' winners, are killed when their RWD- 6 plane crashes in a forest of Těrlicko, Czechoslovakia during a storm enroute to an air meet in Prague
- Sep 12 Brooklyn Dodger Johnny Frederick hits his record 6th pinch hit HR
- Sep 12 German government of Papen falls and the Reichstag dissolved
- Sep 13 NY Yankees clinch their 7th AL pennant
- Sep 14 Military coup in Chile under Arturo Alessandri
- Sep 16 30.8 cm rainfall at Westerly, Rhode Island (state record)
- Sep 16 British actress Peg Entwistle (24) commits suicide by jumping from the letter "H" in the "Hollywoodland" (now "Hollywood") sign in Los Angeles, California [1]
- Sep 20 Chicago Cubs clinch the NL pennant
- Sep 20 Dutch South Seas rebaptized in IJsselmeer
Gandhi Begins Hunger Strike
Sep 20 Mahatma Gandhi begins a hunger strike against the way Hindu untouchables are treated
- Sep 22 Hungarian government of Károlyi falls
FDR Visits Los Angeles
Sep 24 New York Governor Franklin D. Roosevelt visits Los Angeles, California
- Sep 25 Jimmie Foxx hits his 58th HR in last game of season
- Sep 25 Poona Act signed by Madan Mohan Malaviya and B R. Amedkar in India, reserving legislative seats for depressed classes (untouchables)
Bill of Divorcement
Sep 29 Film "Bill of Divorcement" starring John Barrymore and Katharine Hepburn, directed by George Cukor premieres at the Mayfair
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