The Welsh Cup (Welsh: Cwpan Cymru) is a knock-out football competition contested annually by teams from Wales.

The Football Association of Wales is the organising body of this competition, which has been run (except during the two World Wars) every year since its inception in 1877–78.

In the early years of organised football in Wales, football was very much the sport of North Wales rather than the rugby union playing south – the FAW was founded in Ruabon, near Wrexham in 1876, and Wrexham remained the site of the FAW's head office until 1986; it was not until 1912 that a southern team, Cardiff City, won the Welsh Cup for the first time.

The winning team qualifies to play in the following season's UEFA Europa League (previously teams qualified for the European Cup Winners' Cup, which was discontinued in 1999).

Until 1995, some clubs playing in England close to the Welsh border were also invited to play in the Welsh Cup, but could not progress to the European Cup Winners' Cup by winning the cup.

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