- Sep 1 Last Navaho chief Manuelito turns himself in at Fort Wingate
1st Black Delegate
Sep 6 Frederick Douglass is 1st US black delegate to a national convention
British Golf Open
Sep 13 British Open Men's Golf, Prestwick GC: Willie Park Sr. wins his 3rd title; beats his brother Davie Park by 2 strokes
Battle of Curupayty
Sep 22 War of the Triple Alliance: Decisive battle of Curupayty results in a Paraguayan victory and heavy losses for Argentinian and Brazilian forces
- Sep 25 (Leonard W) Jerome Park opens in Bronx for horse racing