Until the 1964–65 season the Welsh Football League operated three divisions, Division One, and two regional Division Two leagues, East and West within the Welsh football league system in South Wales.

After the creation of the Cymru South, for the 2019–20 season, the league was rebranded as the Welsh Football League Division Two and Division Three was defunct.

[1] If the team which finished top of the Division had good enough ground facilities, it was promoted to the Welsh Football League Division Two and was replaced by the team finishing bottom of Division Two.

The team finishing in bottom position of the division was relegated to one of the local leagues.

as Division Two (Tier 3 of the Welsh Football League) as Division One (Tier 3 of the Welsh Football League) as Division Two (Tier 3 of the Welsh Football League) as Division Three (Tier 4 of the Welsh Football Pyramid)