2013 Regional League Division 2 was contested by the five regional league winners and runners up of the 3rd level championships of Thailand. The one 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 2014 campaign, along with this, the two group winners would play off to determine the overall champions.
Assumption Thonburi Bangkok Christian College Kasem Bundit University Kasetsart University RBAC-BEC Tero Sasana Raj-Vithi Thai Honda Chamchuri United Customs United North Bangkok College Nonthaburi Samut Prakan United
Look Isan-Thai Airways Pathum Thani United Rangsit University Samut Prakan
Globlex Thonburi BG United Krung Thonburi Grakcu Looktabfah Pathumthani Raj Pracha BTU Genufood Samut Sakhon Seeker Futera 2013 Regional League Division 2 Bangkok & field Region 2013 Regional League Division 2 Central & Eastern Region 2013 Regional League Division 2 Central & Western Region 2013 Regional League Division 2 Northern Region
2013 Regional League Division 2 North Eastern Region 2013 Regional League Division 2 Southern Regionred Zone:2013 Regional League Division 2 Bangkok Metropolitan Region
Yellow Zone:2013 Regional League Division 2 Central & Eastern Region
Pink Zone:2013 Regional League Division 2 Central & Western Region
Green Zone: 2013 Regional League Division 2 Northern Region Region
Orange Zone:2013 Regional League Division 2 North Eastern Region
Blue Zone:2013 Regional League Division 2 Southern Region
† Winner : Sukhothai (Qualification for the championship pool ).
Phitsanulok won 3–2 on aggregate.
Roi Et United won 2–0 on aggregate.
The Regional Division 2 2013 winners were Roiet United.
