1990–91 Welsh Cup
The 1990–91 Welsh Cup winners were Swansea City. The final was played at the National Stadium in Cardiff in front of an attendance of 11,840
Fourth round
Semi-finals – 1st leg
| Tie no | Home team | Score | Away team |
| 1 | Barry Town | 2–2 | Swansea City |
| 2 | Wrexham | 1–1 | Hereford United |
Semi-finals – 2nd leg
| Tie no | Home team | Score | Away team |
| 1 | Swansea City | 1–0 | Barry Town |
| 2 | Hereford United | 1–2 | Wrexham |