- Sep 1 M Fourny sets world aircraft distance record of 720 km
- Sep 2 Joao Chagas forms Portuguese government
- Sep 3 US National Championship Men's Tennis, Newport R.I.: William Larned wins his 5th consecutive & 7th overall US singles title; beats Maurice McLoughlin 6-4, 6-4, 6-2
- Sep 4 Garros sets world altitude record of 4,250 m (13,944 ft)
- Sep 9 1st European post delivered by air (Hendon to Windsor, England)

Benjamin Disraeli
Election of Interest
Sep 21 Canadian Prime Minister Wilfrid Laurier loses the election to Robert Bordon of the Conservative Party

Wilfrid Laurier
- Sep 22 Boston Rustlers' future Baseball Hall of Fame pitcher Cy Young beats Pittsburgh Pirates, 1-0 at Forbes Field for his final career victory, number 511
- Sep 23 Earl Ovington becomes 1st air mail pilot
- Sep 25 French battleship Liberte explodes at Toulon Harbor, 285 killed
- Sep 25 Groundbreaking begins in Boston for Fenway Park
- Sep 28 NY Highlanders get 13 walk & steal 15 bases (including then record 6 in one inning), beating Browns 18-12; each team committed 6 errors
- Sep 29 Gun magazine of French battleship Liberte explode
