| Season: | 2009 |
| Competition: | 2009 Regional League Division 2 |
| Winners: | Raj Pracha-Nonthaburi |
| Highest Scoring: | Loei City 3 - 3 Chiangrai United (6) |
| Total Goals: | 49 |
| Nextseason: | 2010 |
2009 Regional League Division 2 was contested by the five regional league winners of the 3rd level championships of Thailand.
Five teams met on a home and away basis, with the top three teams gaining promotion to the Thai 1st Division for the 2010 campaign.
2009 Regional League Division 2 Bangkok Metropolitan Region
2009 Regional League Division 2 Central & Eastern Region
2009 Regional League Division 2 Northern Region Region
2009 Regional League Division 2 North Eastern Region
2009 Regional League Division 2 Southern Region
| width=10% | Teams |
|---|---|
| Chiangrai United North Eastern Region 2009 Winners Raj Pracha-Nonthaburi Bangkok & Field Region 2009 Winners Narathiwat Southern Region Winners Loei City North Eastern Region 2009 Winners Samut Prakan Central & Eastern Region 2009 Winners |
The 2009 Regional League Division 2 winners were Raj Pracha-Nonthaburi FC