1977–78 Welsh Cup
The 1977–78 FAW Welsh Cup is the 91st season of the annual knockout tournament for competitive football teams in Wales.
Key
League name pointed after clubs name.- CCL - Cheshire County League
- FL D2 - Football League Second Division
- FL D3 - Football League Third Division
- FL D4 - Football League Fourth Division
- NPL - Northern Premier League
- SFL - Southern Football League
- WLN - Welsh League North
- WLS - Welsh League South
Fourth round
Nine winners from the Third round and seven new clubs.| Tie no | Home | Score | Away |
| 1 | Chester | 0–2 | Wrexham |