1977–78 Welsh Cup

{{Infobox football tournament season

| title = 1977–78 Welsh Cup

| image =

| image_size =

| country = Wales

| num_teams =

| winners = {{flagicon|WAL}} Wrexham

| second = {{flagicon|WAL}} Bangor City

| matches =

| goals =

| prev_season = 1976–77

| next_season = 1978–79

}}

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.

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1Chester (FL D3)0–2Wrexham (FL D3)

Fifth round

{{Empty section|date=May 2020}}

Semifinal

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1Bangor City (NPL)4–2Shrewsbury Town (FL D3)
2Cardiff City (FL D2)0–2Wrexham (FL D3)

Final

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!width=250|Away

rowspan=2|1Bangor City (NPL)1–2Wrexham (FL D3)
Wrexham (FL D3)1–0Bangor City (NPL)