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2025–26 Thai League 1

The 2025–26 Thai League 1 will be the 9th season of Thai League 1 under its current name and the 29th season of top-flight Thai football professional league since its establishment in 1996. This league is also known as BYD Sealion 6 League I due to the sponsorship deal with BYD Auto. The season is scheduled to begin on 15 August 2025 and will conclude on 10 May 2026.

Overview
Promotion and relegation (pre-season) 16 teams will compete in the league – the thirteen teams from previous season and three teams promoted from Thai League 2. Teams promoted from Thai League 2 Chonburi and Ayutthaya United became the first two teams to be promoted on 26 April 2025 after winning their respective matches. Chonburi were also crowned champions by defeating Suphanburi 0–1 in an away match, while Ayutthaya United beat Bangkok 5–1. Kanchanaburi Power became the last team to be promoted after their win against Phrae United 4–5 on aggregate in promotion play-off match. Chonburi returned to the top division after a one-season absence, while for Ayutthaya United and Kanchanaburi Power this was their first season in the top division in their history, respectively. Teams relegated to Thai League 2 Khonkaen United became the first team to be relegated on 30 March 2025 after suffering a 0–5 defeat to Bangkok United. The result ended their time in the top division for 4 seasons. Nakhon Pathom United became the second team to be relegated on 13 April 2025 after earning a 2–2 draw against Port. The result ended their time in the top division for 2 seasons. Nongbua Pitchaya became the third and final team to be relegated after suffering a 1–2 defeat to Port and Rayong's win over Khonkaen United on 20 April 2025. These results meant that Nongbua Pitchaya only lasted one season in the top division and returned to the second division. == Teams ==
Teams
Changes The following teams have changed division since the 2024–25 season. To Thai League 1 Promoted from the Thai League 2ChonburiAyutthaya UnitedKanchanaburi Power From Thai League 1 Relegated to the Thai League 2Khonkaen UnitedNakhon Pathom UnitedNongbua Pitchaya Teams by province • Special administrative area. Stadiums and locations {{#invoke:Transcludable section|main|section=map|text= Personnel and kits Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players and coaches may hold more than one non-FIFA nationality. • Interim. • Apparel made by club. • Apparel used on other competition. • Kanchanaburi Power used Warrix as their apparel in the first half of the season. • Rayong used Imane as their apparel in the first half of the season. Managerial changes Pre-season During the season == Foreign players ==
Foreign players
Each team can register a maximum of seven foreign players and an unlimited number of players from the AFF member countries. However, only five foreign players and two AFF players are allowed in the line-up for each match. • Players named in bold indicates the player was registered during the mid-season transfer window. • Former players named in italics are players that were out of squad or left the club within the season, after the pre-season transfer window, or in the mid-season transfer window, and at least had one appearance. • Unregistered players refer to players who are not registered for the Thai League but still contracted to the team for other competitions. Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality. Foreign players by confederation Dual citizenship/heritage players • Players name in bold indicates the player was registered during the mid-season transfer window. • Player's name in italics indicates Overseas Thai players whom have obtained an Thailand passport and citizenship, therefore being considered as local players. Notes: : Carrying Thai heritage. : Capped for Thailand. ==League table==
League table
Positions by round Results by match played == Results ==
Season statistics
Top Goalscorers :As of 3 May 2026. Hat-tricks Clean sheets :As of 3 May 2026. Attendances Overall Home match played Source: Thai League 1 2025–26 == See also ==
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