|Duration||September 30 – December 16, 1923|
The 1923 NFL season was the fourth regular season of the National Football League. For the first time, all of the clubs that were considered to be part of the NFL fielded teams. The new teams that entered the league included the Duluth Kelleys, the St. Louis All Stars (which only lasted one season), and a new Cleveland Indians team. The Evansville Crimson Giants folded from the league.
The Canton Bulldogs repeated as NFL Champions after ending the season with an 11–0–1 record.
Twenty teams competed in the NFL during the 1923 season.
|First season in NFL *||Team folded this season ^||Last season before hiatus, rejoined league later §|
|First season in NFL, and then folded after this season *^|
|Green Bay Packers||7||2||1||.778||85||34||W5|
|Rock Island Independents||2||3||3||.400||84||62||L1|
|St. Louis All-Stars||1||4||2||.200||25||74||L1|
Note: Tie games were not officially counted in the standings until 1972.