The team who is declared champion at the end of the season is eligible for promotion to the WRU Division Two West.
[1] The initial three year sponsorship was extended at the end of the 2010/11 season, making SWALEC the league sponsors until 2015.
BP Llandarcy were named champions at the end of the season and were promoted to Division Two West.
* Banwen RFC failed to raise a team on more than one occasion and were relegated to division five.
All matches played against opposition in Division Three South West were declared null and void.