The 2012 Regional League Division 2 (also known as the AIS Regional League Division 2 for sponsorship reasons) was contested by the five regional league winners and runners up of the 3rd level championships of Thailand. The two best 3rd placed teams from the regional leagues also take part
Twelve teams were split into two groups of A & B, with the top two teams from group A & B gaining promotion to the Yamaha League-1 for the 2013 campaign, along with this, the two group winners would play off to determine the overall champions.
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<span style="color:red;">red Zone</span>:2012 Regional League Division 2 Bangkok Metropolitan Region<br /> <span style="color:#ffff00;">Yellow Zone</span>:2012 Regional League Division 2 Central & Eastern Region<br /> <span style="color:#008000;">Green Zone</span>: 2012 Regional League Division 2 Northern Region Region<br /> <span style="color:Orange;"> Orange Zone</span>:2012 Regional League Division 2 North Eastern Region<br /> <span style="color:blue;">Blue Zone</span>:2012 Regional League Division 2 Southern Region<br />
Last updated December 9, 2012
The Regional Division 2 2012 winners were Ayutthaya.