| 1955–56 Welsh Cup | |
| Country: | Wales |
| Second: | Swansea Town |
| Prev Season: | 1954–55 |
| Next Season: | 1956–57 |
The 1955–56 FAW Welsh Cup is the 69th season of the annual knockout tournament for competitive football teams in Wales.
League name pointed after clubs name.
Nine winners from the Fourth round and seven new clubs.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Rhyl (CCL) | 0–2 | Chester (FL D3N) |
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Swansea Town (FL D2) | 1–0 | Chester (FL D3N) |
Swansea Town and Newport County played at Cardiff, Oswestry Town and Cardiff City played at Wrexham.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Oswestry Town (B&DL) | 0–7 | Cardiff City (FL D1) | ||||
| 2 | Swansea Town (FL D2) | 5–2 | Newport County (FL D3S) |
Final were held at Cardiff.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Cardiff City (FL D1) | 3–2 | Swansea Town (FL D2) |