The 2025 Thailand Semi-pro League marks its third season of the Thailand Semi-pro League, as the official fourth tier of the Thai football league system, organized by the Football Association of Thailand (FA Thailand) and managed by Thai League Co., Ltd. This league serves as a crucial stepping stone for clubs aspiring to reach professional football, offering a structured pathway to promotion into Thai League 3. A total of 40 clubs are competing in this season, with each club required to meet the Semi-pro Club Licensing requirements. Admission is based on an application process, ensuring that clubs are well-prepared for competitive football at this level. The season officially kicked off on 15 March 2025 and will culminate with the National Championship Stage on 28 June 2025, where the national champion will be crowned.
The league is structured into two key stages: the Regional Stage and the National Championship Stage. In the Regional Stage, clubs compete within their respective zones, with the top-performing club in each region securing automatic promotion to Thai League 3 for the following season. Once the six regional winners are determined, they advance to the National Championship Stage, where they battle for the title of Thailand Semi-pro League Champion. This competitive format not only fosters regional football development but also intensifies the journey toward professional-level competition, making the league an exciting and essential part of Thai footballâÂÂs ecosystem.
The league is divided into six regional zones, following the structure of Thai League 3. The number of clubs in each region is determined by the number of clubs that meet the licensing criteria. The Northern Region has 8 clubs, the Northeastern Region has 12 clubs, the Eastern Region has 7 clubs, the Central Region has 7 clubs, the Western Region has 4 clubs, and the Southern Region has 2 clubs, making a total of 40 clubs. The competition format for the Regional Stage varies across regions: the Northern, Eastern, and Central Regions follow a single round-robin format, with each club playing 6âÂÂ7 matches; the Northeastern Region also uses a round-robin format, but with 11 matches per club; the Western Region employs a double round-robin format (home and away), with each club playing 6 matches; and the Southern Region uses a quadruple round-robin format, with each club playing 4 matches. At the end of the Regional Stage, the top club from each region earns promotion to Thai League 3 for the following season and advances to the National Championship Stage.
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Note: The match between Karin United and The Wall on 19 April 2025 was awarded as a 0âÂÂ3 win to The Wall after Karin United fielded an ineligible player.
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The National Championship Stage is held after the completion of the Regional Stage. The six regional champions qualify for this stage, where they compete for the national championship title. The competition is divided into two groups based on geography. The Upper Region group consists of the champions from the Northern Region, Northeastern Region, and Eastern Region. The Lower Region group consists of the champions from the Central Region, Western Region, and Southern Region. Each group follows a single round-robin format, with every team playing two matches. The team that finishes first in each group advances to the Finals. The Finals are played as a two-legged home-and-away knockout tie, with the winner determined by the aggregate score. The winner is crowned the Thailand Semi-pro League Champion for the 2025 season.
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Banbueng City won 4âÂÂ1 on aggregate.