| 1950–51 Welsh Cup | |
| Country: | Wales |
| Winners: | Merthyr Tydfil |
| Second: | Cardiff City |
| Prev Season: | 1949–50 |
| Next Season: | 1951–52 |
The 1950–51 FAW Welsh Cup is the 64th season of the annual knockout tournament for competitive football teams in Wales.
League name pointed after clubs name.
Eight winners from the Fourth round and six new clubs.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Chester (FL D3N) | 2–1 | Rhyl (CCL) |
Seven winners from the Fifth round plus one new club.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Merthyr Tydfil (SFL) | 5–2 | Chester (FL D3N) |
Cardiff City and Wrexham played at Shrewsbury, both matches between Newport County and Merthyr Tydfil were held at Cardiff.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Cardiff City (FL D2) | 1–0 | Wrexham (FL D3N) | ||||
| 2 | Newport County (FL D3S) | 1–1 | Merthyr Tydfil (SFL) | ||||
| replay | Newport County (FL D3S) | 1–4 | Merthyr Tydfil (SFL) |
Final and replay were held at Swansea.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Merthyr Tydfil (SFL) | 1–1 | Cardiff City (FL D2) | ||||
| replay | Merthyr Tydfil (SFL) | 3–2 | Cardiff City (FL D2) |