1890–91 FA Cup
| Tournament details | |
|---|---|
| Country | England Scotland Wales Ireland |
| Defending champions | Blackburn Rovers |
| Final positions | |
| Champions | Blackburn Rovers (5th title) |
| Runners-up | Notts County |
The 1890–91 FA Cup was the 20th edition of the world's oldest association football knockout competition, The Football Association Challenge Cup, or FA Cup.