The 2024 Thailand Semi-pro League is the second season of the Thailand Semi-pro League, the fourth-tier professional league for association football clubs in Thailand, since its establishment in 2023,[1] A total of 38 teams would be divided into 6 regions including 7 teams in the Northern region, 9 teams in the Northeastern region, 8 teams in the Eastern region, 7 teams in the Western region, 2 teams in the Southern region, and 5 teams in the Bangkok metropolitan region.

1st place of each zone qualified for this stage by being featured in 2 groups.

Teams from the Northern, Northeastern, and Eastern regions would have qualified for the upper group.

Meanwhile, teams from the Western, Southern, and Bangkok Metropolitan regions would have qualified for the lower group.

Roi Et PB United won 6–2 on aggregate.