| 1948–49 Welsh Cup | |
| Country: | Wales |
| Winners: | Merthyr Tydfil |
| Second: | Swansea Town |
| Prev Season: | 1947–48 |
| Next Season: | 1949–50 |
The 1948–49 FAW Welsh Cup is the 62nd 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 ten new clubs.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Chester (FL D3N) | 0–6 | Wrexham (FL D3N) |
Two winners from the Fifth round. Seven other clubs get a bye to the Seventh round.
One winner from the Sixth round plus seven clubs who get a bye in the previous round.
Swansea Town and Rhyl played at Wrexham, Cardiff City and Merthyr Tydfil played at Swansea.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Swansea Town (FL D3S) | 3–0 | Rhyl (CCL) | ||||
| 2 | Cardiff City (FL D2) | 1–3 | Merthyr Tydfil (SFL) |
Final were held at Cardiff.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Merthyr Tydfil (SFL) | 2–0 | Swansea Town (FL D3S) |