| 1928–29 Welsh Cup | |
| Country: | Wales |
| Winners: | Connah's Quay & Shotton |
| Second: | Cardiff City |
| Prev Season: | 1927–28 |
| Next Season: | 1929–30 |
The 1928–29 FAW Welsh Cup is the 48th season of the annual knockout tournament for competitive football teams in Wales.
League name pointed after clubs name.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Chester (CCL) | 1–1 | Oswestry Town B&DL |
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Chester (CCL) | 2–5 | Buckley |
Eight winners from the Fourth round and eight new clubs.
Both semifinals were held at Rhyl.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Connah's Quay & Shotton | 7–0 | Merthyr Town (FL D3S) | ||||
| 2 | Rhyl | 1–2 | Cardiff City (FL D2) |
Final were held at Shrewsbury, replay - at Wrexham.
| width=50 | Tie no | width=250 | Home | width=50 | Score | width=250 | Away |
|---|---|---|---|---|---|---|---|
| 1 | Connah's Quay & Shotton | 3–0 | Cardiff City (FL D1) |