1921 All-Ireland Senior Football Championship
| All-Ireland Champions | |
|---|---|
| Winning team | Dublin (12th win) |
| Captain | Eddie Carroll |
| All-Ireland Finalists | |
| Losing team | Mayo |
| Provincial Champions | |
| Munster | Tipperary |
| Leinster | Dublin |
| Ulster | Monaghan |
| Connacht | Mayo |
| Championship statistics | |
← 1920 1922 → | |
The 1921 All-Ireland Senior Football Championship was the 35th staging of Ireland's premier Gaelic football knock-out competition. Dublin were the winners. They ended Tipperary's All Ireland title in the final.
Tipperary were awarded the Munster title due to Civil War the rest of the Munster counties didn't complete in the championship.