1877–78 FA Cup
| Tournament details | |
|---|---|
| Country | England Wales |
| Teams | 43 |
| Defending champions | Wanderers |
| Final positions | |
| Champions | Wanderers (5th title) |
| Runners-up | Royal Engineers |
The 1877–78 Football Association Challenge Cup was the seventh staging of the FA Cup, England's oldest football tournament. Forty-three teams entered, six more than the previous season, although four of the forty-three never played a match.