- Oct 3 Captain Jack and companions are hanged for their part in the Modoc War.
- Oct 4 Toronto Argonauts Football Club (CFL) forms as Argonaut Rowing Club rugby-football squad; oldest existing pro sports team in North America still using original name
- Oct 4 British Open Golf, St Andrews: Scotsman Tom Kidd beats countryman Jamie Anderson by 1 stroke; first Open not held at Prestwick GC
- Oct 8 First women's prison run by women opens at Indiana Reformatory Institute
- Oct 11 Toronto Argonaut Football Club 1st game losing to U of Toronto
- Oct 18 1st football game between Toronto Argonauts & Hamilton Tigers
- Oct 18 Columbia Princeton Rutgers & Yale set rules for collegiate football
- Oct 30 P T Barnum's circus, "Greatest Show on Earth", debuts (New York City)