1921 Rock Island Independents season

1921 Rock Island Independents season
General managerWalter Flanigan
Head coachFrank Coughlin,
Jimmy Conzelman
Home stadiumDouglas Park
Results
Record4–2–1 APFA
(5–2–1 overall)
League place5th in APFA

The 1921 Rock Island Independents season was their second completed in the young American Professional Football Association (APFA), later rechristened the National Football League. The team failed to improve on their previous record against league opponents of 6–2–2, winning only four games. They finished fifth in the league.