The 1986-87 Welsh Cup winners were Merthyr Tydfil. The final and replay were played at Ninian Park in Cardiff in front of attendances of 7,000 and 6,010 respectively.
| Tie no | Home team | Score | Away team |
|---|---|---|---|
| 1 | Newport County | 2–1 | Wrexham |
| 2 | Merthyr Tydfil | 1–0 | Bangor City |
| Tie no | Home team | Score | Away team |
|---|---|---|---|
| 1 | Wrexham | 2–2 | Newport County |
| 2 | Bangor City | 1–0 (2−4p) | Merthyr Tydfil |
| Merthyr Tydfil | 2–2 | Newport County |
|---|---|---|
Latchford  Webley |
Thackeray 2 |
Attendance: 7,000
Referee: F Roberts (Prestatyn)
Merthyr Tydfil |
Newport County |
| Merthyr Tydfil | 1–0 | Newport County |
|---|---|---|
| Baird |
Attendance: 6,010
Referee: F Roberts (Prestatyn)
Merthyr Tydfil |
Newport County |
Wales
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