| 1956–57 Welsh Cup | |
| Country: | Wales |
| Second: | Swansea Town |
| Prev Season: | 1955–56 |
| Next Season: | 1957–58 |
The 1956–57 FAW Welsh Cup is the 70th season of the annual knockout tournament for competitive football teams in Wales.
League name pointed after clubs name.
Ten winners from the Fourth round and six new clubs.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Oswestry Town (B&DL) | 0–3 | Chester (FL D3N) |
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Cardiff City (FL D1) | 0–2 | Chester (FL D3N) |
Swansea Town and Newport County played both matches at Cardiff, Wrexham and Chester played at Rhyl.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Swansea Town (FL D2) | 1–1 | Newport County (FL D3S) | ||||
| replay | Swansea Town (FL D2) | 3–0 | Newport County (FL D3S) | ||||
| 2 | Wrexham (FL D3N) | 2–0 | Chester (FL D3N) |
Final were held at Cardiff.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Wrexham (FL D3N) | 2–1 | Swansea Town (FL D2) |