The 1977–78 FAW Welsh Cup is the 91st season of the annual knockout tournament for competitive football teams in Wales.

1977–78 Welsh Cup
Tournament details
CountryWales
Final positions
ChampionsWales Wrexham
Runner-upWales Bangor City

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

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Nine winners from the Third round and seven new clubs.

Tie no Home Score Away
1 Chester (FL D3) 0–2 Wrexham (FL D3)

Fifth round

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Semifinal

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Tie no Home Score Away
1 Bangor City (NPL) 4–2 Shrewsbury Town (FL D3)
2 Cardiff City (FL D2) 0–2 Wrexham (FL D3)

Final

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Tie no Home Score Away
1 Bangor City (NPL) 1–2 Wrexham (FL D3)
Wrexham (FL D3) 1–0 Bangor City (NPL)
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