If the team which finishes top of the division has good enough ground facilities, traditionally it was promoted to the Welsh Football League Division One and is replaced by the team finishing bottom of Division One.

The team finishing in bottom position is relegated to the Welsh Football League Division Three.

This division has changed its title on numerous occasions to follow suit of the other leagues within the competition; for seven years in the 1980s it was known as the Premier Division as the top flight adopted the National Division name, while Division Two was split into two sections - A & B and West & East - for many years before 1965.

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

[1] Information from 1913-14 onwards is sourced from the Welsh Football Data Archive section for the Welsh Football League.