- Sep 3 Anti-Jewish riots break out in Stockholm, Sweden
- Sep 11 Olympia Columbian is 1st newspaper published north of Columbia R
- Sep 14 Samuel D Hubbard of Conn takes office as 18th US Postmaster General
- Sep 24 Henri Giffard, a French engineer, makes 1st engine powered dirigible/airship flight with steam power
- Sep 27 George L Aiken's "Uncle Tom's Cabin" premieres in Troy, NY