The 1949–50 FAW Welsh Cup is the 63rd season of the annual knockout tournament for competitive football teams in Wales.
Key
League name pointed after clubs name. • CCL - Cheshire County League • FL D3N - Football League Third Division North • FL D3S - Football League Third Division South • SFL - Southern Football League ==Fifth round==
Fifth round
Seven winners from the Fourth round and eleven new clubs. Caernarvon Town get a bye to the Sixth round. ==Sixth round==
Sixth round
One winner from the Fifth round and Caernarvon Town. Seven other clubs get a bye to the Seventh round. ==Seventh round==
Seventh round
One winner from the Sixth round plus seven clubs who get a bye in the previous round. ==Semifinal==
Semifinal
Swansea Town and Mertyr Tydfil played at Cardiff. ==Final==