| Season: | 2012 |
| Nextseason: | 2013 |
2012 Regional League Division 2 Southern Region is the 3rd season of the League competition since its establishment in 2009. It is in the third tier of the Thai football league system.
Krabi and Phattalung were promoted to the 2012 Thai Division 1 League.
| Team | Location | Stadium | Capacity | |
|---|---|---|---|---|
| Chumphon | Chumphon | Chumphon Province Stadium | 3,000 | [1] |
| Hat Yai | Songkhla | Jiranakorn Stadium | 25,000 | [2] |
| Nakhon Si Thammarat | Nakhon Si Thammarat | Nakhon Si Thammarat Province Stadium | 4,744 | [3] |
| Nara United | Narathiwat | Narathiwat Municipal Stadium | 8,000 | [4] |
| Pattani | Pattani | Rainbow Stadium | 8,000 | [5] |
| Phang Nga | Phang Nga | Phang Nga Province Stadium | 3,000 | [6] |
| Ranong | Ranong | Ranong Province Stadium | 7,212 | [7] |
| Satun United | Satun | Satun Province Stadium | ? | [8] |
| Surat | Surat Thani | Surat Thani Province Stadium | 10,000 | [9] |
| Trang | Trang | Trang City municipality Stadium | 4,789 | [10] |
| Yala | Yala | Institute of Physical Education Yala Campus Stadium | ? | [11] |