Portal:Sports/Selected anniversaries/October
- October 1, 1903 – The first game of the inaugural Major League Baseball World Series (2011 game pictured) takes place at the Huntington Avenue Baseball Grounds in Boston, Massachusetts
- October 4, 1895 – The first U.S. Open golf tournament is held at the Newport Country Club in Newport, Rhode Island
- October 7, 2006 – The inaugural Lusophony Games, a multi-sport event for athletes from Portuguese language-speaking countries, begins in Macau
- October 15, 1999 – The first match of the inaugural Rugby League Tri-Nations series is played
- October 24–25, 1987 – The FILA Wrestling World Championships hold their first World Women Championships in Lørenskog, Norway