| Thailand Semi-pro League | |
| Country: | Thailand |
| Organiser: | Thai League |
| Confed: | AFC |
| Teams: | 38 |
| Promotion: | Thai League 3 |
| Relegation: | Thailand Amateur League |
| Levels: | 4 |
| Domest Cup: | Thai FA Cup |
| Champions: | Roi Et PB United (1st title) |
| Season: | 2024 |
| Current: | 2024 Thailand Semi-pro League |
Thailand Semi-pro League (th|ไทยแลนด์ เซมิโปรลีก), commonly known as the TS, is the fourth level of Thai football organized by Thai League Co. Ltd. It was started in 2023 by Football Association of Thailand for improving all Thai Amateur clubs to be better and preparing the amateur clubs ready to play in Football League in each region.[1] This competition is organized to find clubs that will be promoted to Thai League 3 but will not be relegated.
Clubs that participate in the competition are recruited through applications each year. Therefore, the number of clubs competing each year is not the same, depending on how many clubs will apply each year. All amateur clubs can apply to compete in this competition but must meet the club licensing standards of the Football Association of Thailand.
| Seasons | Number of teams | National Championship | Promoted clubs | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Champions | Runners-up | Northern region | Northeastern region | Eastern region | Western region | Southern region | Bangkok Metropolitan region | |||
| 2023 | 34 | Satun | Khelang United | Khelang United | Suranaree Army 2 | Prachinburi City | Thap Luang United | Satun | The iCON RSU | |
| Banfootball Pattaya | ||||||||||
| 2024 | 38 | Roi Et PB United | Dome | Chattrakan City | Roi Et PB United | Padriew City | Samut Songkhram City | Yala City | Dome | |