The 1939–40 FAW Welsh Cup is the 59th season of the annual knockout tournament for competitive football teams in Wales.

Key League name pointed after clubs name. B&DL - Birmingham & District League FL D2 - Football League Second Division FL D3N - Football League Third Division North

Fourth round Eight winners from the Third round plus 18 new clubs. Tie noHomeScoreAway1Chester (FL D3N)4–2Shrewsbury Town

Fifth round Ten winners from the Fourth round. Cardiff City, Chester and Southport get a bye to the Sixth round.

Sixth round Five winners from the Fifth round plus Cardiff City, Chester and Southport. Tie noHomeScoreAway1Chester (FL D3N)1–3Wellington Town (B&DL)2New Brighton (FL D3N)1–0Southport (FL D3N)3Cardiff City (FL D3S)1–1Newport County (FL D2)4Swansea Town (FL D2)2–0Aberystwyth Town (MWL) ReplayNewport County (FL D2)5–0Cardiff City (FL D3S)

Semifinal Replay between Wellington Town and New Brighton were held at Shrewsbury. Tie noHomeScoreAway1Swansea Town (FL D2)1–0Newport County (FL D2)2Wellington Town (B&DL)0–0New Brighton (FL D3N)replayWellington Town (B&DL)4–2New Brighton (FL D3N)

Final Final were held at Shrewsbury. Tie noHomeScoreAway1Wellington Town (B&DL)4–0Swansea Town (FL D2)

External links The FAW Welsh Cup