The 2019 Thai League 2 is the 22nd season of the Thai League 2, the second-tier professional league for Thailand's association football clubs, since its establishment in 1997, also known as M-150 Championship due to the sponsorship deal with M-150. A total of 18 teams will compete in the league. The season began on 9 February 2019 and is scheduled to conclude on 27 October 2019.
The 1st transfer window is from 26 November 2018 to 19 February 2019 while the 2nd transfer window is from 24 June 2019 to 19 July 2019.
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<small>Source: Thai League 2</small>