1890–91 Scottish Cup
| Tournament details | |
|---|---|
| Country | Scotland |
| Defending champions | Queen's Park |
| Final positions | |
| Champions | Heart of Midlothian |
| Runners-up | Dumbarton |
The 1890–91 Scottish Cup was the 18th season of Scotland's most prestigious football knockout competition. Heart of Midlothian defeated Dumbarton 1–0 to win the trophy.