The 2016 Thai League T1 (also known as the Toyota Thai League for sponsorship reasons) was the 20th season of the Thai League T1, the top Thai professional league for association football clubs, since its establishment in 1996. A total of 18 teams competed in the league. The season started on 5 March 2016.
Buriram United are the defending champions, having won the Thai Premier League title the three consecutive seasons.
Following the death of King Bhumibol Adulyadej, the Football Association of Thailand cancelled the remaining league season on 14 October 2016, with three rounds remaining. Muangthong United were therefore crowned champions with BBCU, Chainat and Army United relegated.
The following day however (15 October), FAT appeared to do a U-turn and announced that further discussions with key stake holders would determine whether the league campaign would continue. These discussions were required as teams that were in the relegation places at the time of the original announcement were voicing their concerns.
On the 16 October, after a meeting of all top flight league clubs it was announced that the original decision to cancel the remaining games would stay in place, therefore crowning Muangthong United as champions for the 4th time.
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A total of 18 teams will contest the league, including 15 sides from the 2015 season and three promoted from the 2015 Thai Division 1 League.
TOT and Port were relegated to the 2016 Thai Division 1 League after finishing the 2015 season. 14th-placed Saraburi withdrew from the league after the season, sparing BEC Tero Sasana from relegation. They were replaced by the best three teams from the 2015 Thai Division 1 League runners-up Pattaya United, third place Sukhothai and fourth place BBCU.
<small>Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.</small>
The number of foreign players is restricted to five per Thai League T1 team. A team can use four foreign players on the field in each game, including at least one player from the AFC country.
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