| Championship details | |
|---|---|
| Dates | 19 May – 15 September 1991 |
| Teams | 32 |
| All-Ireland Champions | |
| Winning team | Down (4th win) |
| Captain | Paddy O'Rourke |
| Manager | Pete McGrath |
| All-Ireland Finalists | |
| Losing team | Meath |
| Captain | Liam Hayes |
| Manager | Seán Boylan |
| Provincial Champions | |
| Munster | Kerry |
| Leinster | Meath |
| Ulster | Down |
| Connacht | Roscommon |
| Championship statistics | |
| No. matches played | 38 |
| Top Scorer |  Brian Stafford (4-62) |
| Player of the Year | Colm O'Rourke |
← 1990 1992 → | |
The 1991 All-Ireland Senior Football Championship was the 105th staging of the All-Ireland Senior Football Championship, the Gaelic Athletic Association's premier inter-county Gaelic football tournament. The championship began on 19 May 1991 and ended on 15 September 1991.
In the Munster semi-final Kerry ended Cork's 2 years as All Ireland champions.
Down defeated Meath in the final by a scoreline of 1–16 to 1–14. The Ulster county's victory was to be the start of four consecutive All-Ireland titles for the province. For Meath, it was their second consecutive defeat in a final, having lost to Cork in the 1990 final.
The Championship was noted for the tie between Dublin and Meath that took three replays to decide.