The Welsh Rugby Union Division Four South West (also called the SWALEC Division Four South West for sponsorship reasons) is a rugby union league in Wales first implemented for the 1995/96 season.
The team who is declared champion at the end of the season is eligible for promotion to the WRU Division Three South West.
The two lowest placed teams are relegated into the WRU Division Five South West.
[1] The initial three year sponsorship was extended at the end of the 2010/11 season, making SWALEC the league sponsors until 2015.
1 Brynoch RFC were penalised with a 4-point deduction for not contesting scrums during a game with Glyncorrwg.