- Sep 13 British Open Men's Golf, Prestwick GC: Tom Morris, Jr. wins 4th consecutive title; beats fellow Scot Davie Strath by 3 strokes
- Sep 14 Britain pays US$15½m for damages during Civil War
- Sep 17 Phillip W Pratt patents his sprinkler system for extinguishing fires
- Sep 18 King Oscar II accedes to the throne of Sweden-Norway
- Sep 21 John Henry Conyers of South Carolina becomes first black student at Annapolis
- Sep 24 Franz Grillparzer's "Ein Bruderzwist in Habsburg" premieres in Vienna
- Sep 26 The first Shriners Temple (called Mecca) was established in New York City.
- Sep 29 "3 Fingers" Mackenzie destroys Kwahadi-Commanche village
- Sep 29 Kiowa-chief Lone Wolf captures Satanta & Big Tree