|Season 2013||Start date 2013|
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2013 Regional League Division 2 Southern Region is the 5th season of the League competition since its establishment in 2009. It is in the third tier of the Thai football league system.
No club was promoted to the Thai Division 1 League. Last years league champions Trang and runners up Pattani failed to qualify from the 2012 Regional League Division 2 championship pool.
Phattalung, Songkhla were relegated from the 2012 Thai Division 1 League.
Hat Yai, Songkhla have withdrawn from the 2013 campaign.
Rules for classification: 1) points; 2) head-to-head points; 3) head-to-head goal difference; 4) head-to-head goals scored; 5) goal difference; 6) number of goals scored
(C) = Champion; (R) = Relegated; (P) = Promoted; (E) = Eliminated; (O) = Play-off winner; (A) = Advances to a further round.
Only applicable when the season is not finished:
(Q) = Qualified to the phase of tournament indicated; (TQ) = Qualified to tournament, but not yet to the particular phase indicated; (RQ) = Qualified to the relegation tournament indicated; (DQ) = Disqualified from tournament.
Head-to-Head: used when head-to-head record is used to rank tied teams.