The league consists of teams having their grounds and headquarters West of a line drawn from Briton Ferry, Neath, northwards to Glynneath, and then again northwards to the boundary line of the South Wales Football Association.

It offers promotion opportunities to the Ardal Leagues, at tier 3 of the Football Association of Wales pyramid.

It instead started in August 2021 with 11 clubs instead of the 12 planned for the 2020–21 season as Ystradgynlais were not part of the fixture list.

This plan has led to a reorganisation of the Welsh football Pyramid.

[1] The West Wales Premier League sits at tier four of the Welsh Football Pyramid, and was initially set to run with 11 member clubs.