Portal:Sports/Selected anniversaries/September
- September 4, 1931 – The World Archery Federation is founded in Lviv, Ukraine as the Fédération Internationale de Tir à l'Arc
- September 4, 1955 – The first season of the European Cup, the predecessor to the UEFA Champions League, begins with a match between Sporting Clube de Portugal and FK Partizan
- September 4, 1995 – The inaugural Military World Games, a multi-sport event for military sportspeople, opens in Rome, Italy
- September 17, 1920 – The National Football League (game pictured), the highest level professional American football league in the United States, is founded
- September 18, 1961 – The Confederation of North, Central American and Caribbean Association Football is formed by the merger of the NAFC and the CCCF confederations