Championnat du pays de Galles de football
The Welsh Premier League champions are the winners of the highest league in Welsh football, which is currently the Welsh Premier League, known as the League of Wales prior to the 2002–03 season. Teams in bold are those who won the double of the Welsh Premier League Championship and Welsh Cup, those in "italic" are those that won the treble of the Welsh Premier League, Welsh Cup and Welsh League Cup in that season.