The top three teams Raj Pracha Nonthaburi, Chiangrai United, and Nara United in the 2009 Regional League Division 2 were promoted to the 2010 Thai Division 1 League, the feeder league for the Thai Premier League.
The top three teams Raj Pracha Nonthaburi, Chiangrai United, and Nara United in the 2009 Regional League Division 2 were promoted to the 2010 Thai Division 1 League, the feeder league for the Thai Premier League.