2021 All-Ireland Senior Football Championship
| Championship details | |
|---|---|
| Dates | 26 June – 11 September 2021 |
| Teams | 31 |
| All-Ireland Champions | |
| Winning team | Tyrone (4th win) |
| Captain | Pádraig Hampsey |
| Manager | Feargal Logan Brian Dooher |
| All-Ireland Finalists | |
| Losing team | Mayo |
| Captain | Aidan O'Shea |
| Manager | James Horan |
| Provincial Champions | |
| Munster | Kerry |
| Leinster | Dublin |
| Ulster | Tyrone |
| Connacht | Mayo |
| Championship statistics | |
| Top Scorer | Seán O'Shea (2–29) |
| Player of the Year | Kieran McGeary |
← 2020 2022 → | |
The 2021 All-Ireland Senior Football Championship (SFC) was the 134th edition of the Gaelic Athletic Association's premier inter-county Gaelic football tournament since its establishment in 1887.
Thirty one of the thirty two Irish counties took part – Kilkenny did not compete. London and New York were withdrawn as a result of the public health restrictions imposed due to the COVID-19 pandemic.
Most division three and four teams which did not reach their provincial final were scheduled to compete in the 2021 Tailteann Cup. In previous years, they would have competed in the All-Ireland SFC qualifiers. However, the introduction of the Tailteann Cup was postponed until 2022 (having been originally postponed from 2020).
There was no "Super 8" group stage (officially the All-Ireland quarter-final group stage). The four provincial winners advanced to the All-Ireland SFC semi-finals which were played as single knockout games.
Dublin were six-time defending champion, and were seeking to claim an unprecedented seventh consecutive title. Having won the Leinster SFC, they were defeated by Mayo in the All-Ireland SFC semi-finals.
The final was played on 11 September 2021 at Croke Park in Dublin, between Tyrone and Mayo, in what was a first meeting between the teams in the decider. Tyrone won a fourth title after a 2–14 to 0–15 win against Mayo. Mayo lost an 11th consecutive final since 1989, and a sixth final loss in nine years, with this latest defeat on an identical scoreline to 2020, when Mayo lost to Dublin.