Provincial League also known as Pro League was the old regional Football league in Thailand in 1999–2008. It was founded in 1999 under the name "Provincial League" organized by Sports Authority of Thailand (SAT) and Ministry of Tourism and Sports. The name was changed to "Professional League" in 2004 and then changed back to "Provincial League" in 2007.
Thailand Tobacco Monopoly Football Club, commonly known as the TTM FC., was a Thai defunct football club originally based in Bangkok. The club, founded in 1963, was one of the oldest clubs in Thailand. Their biggest achievement was winning the Thai Premier League title in 2005.
The Thai League 1, often referred to as T1, is the highest level of the Thai football league system. Contested by 16 clubs, it operates on a system of promotion and relegation with Thai League 2. Seasons typically run from August to May, with each team playing 30 games: two against each other team, one home and one away. It is sponsored by Toyota Motor Thailand and therefore officially known as the Hilux Revo Thai League. In the Thai League, most games are played on Saturday and Sunday evenings, occasionally being played on Wednesday and Friday evening fixtures.
Thai League 4, commonly known as the T4, was the fourth level association football league in Thailand. In 2009, it was divided into five groups by geographic region. Each group contained 16 clubs except for the Southern Region group which contained 13 clubs. It was sponsored by AIS and therefore officially known as the AIS Regional League Division 2. In 2016, Khor Royal Cup became a trophy for Regional League Division 2.
Sisaket Football Club is a Thai defunct professional football club. The club used to play in the Thai League 1 between season 2010 to 2017. The highlight is being a local team that has a large number of football fans in the Isan area.
The 2009 Thai League Division 1 has 16 teams.
2010 Regional League Division 2 Bangkok Metropolitan Region is the 2nd season of the League competition since its establishment in 2009. It is in the third tier of the Thai football league system.
The 2013 Thai Premier League is the 17th season of the Thai Premier League since its establishment in 1996. A total of 18 teams are competing in the league. It will begin in 2 March 2013 to 3 November 2013.
Songkhla United Football Club is a Thai defunct professional football club based in Songkhla Province.
The 2015 Thai Premier League was the 19th season of the Thai Premier League since its establishment in 1996. A total of 18 teams competed in the league. The season began on 14 February and finished on 13 December.
The 2016 Thai League T1 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.
Thailand Amateur League, commonly known as the TA, is the fifth level of Thai football organised by Thai League Co., Ltd. It was started in 2017 by an idea from Police General Somyot Poompanmoung, the president of Football Association of Thailand to improve all Thai Amateur clubs to be better and allowing other clubs which are in other regions chances to play in national FA tournament. In 2017, the tournament was divided into 12 regions and participated by 119 clubs which are former members Football Division 3, and debutants in the season. As the tournament is considered as the lowest level of Thai football, so the number of participants is unlimited as well as any club is able to send an application to participate in the tournament. In 2016, the Football Division 3 became a trophy for the Thailand Amateur League.
2017 Thai League 4 Western Region is the 5th season of the League competition since its establishment in 2013. It is in the 4th tier of the Thai football league system.
Phitsanulok Unity Football Club is a Thai football club based in Phitsanulok province. The club is currently playing in the Thai League 3 Northern region.
The 2020–21 Thai League 3 is the fourth season of the Thai League 3, the third-tier professional league for association football clubs in Thailand, since its establishment in 2017, also known as Omsin League Regional Championship due to the sponsorship deal with Government Savings Bank. Due to the COVID-19 pandemic in Thailand, the season must be postponed to start in late 2020 and end in early 2021. In addition, the Thai League 4 had combined with the Thai League 3 and compete as Thai League 3 since this season and there is no relegation in this season. A total of 72 teams would be divided into 6 regions including 11 teams in the Northern region, 11 teams in the Northeastern region, 12 teams in the Eastern region, 12 teams in the Western region, 12 teams in the Southern region, and 14 teams in the Bangkok metropolitan region.
The 2020–21 Thai League 3 Northern region is a region in the regional stage of the 2020–21 Thai League 3. Due to the COVID-19 pandemic, the season must be postponed to start in late 2020 and end in early 2021. In addition, the Thai League 4 had combined with the Thai League 3 and compete as Thai League 3 since this season and there is no relegation in this season. A total of 11 teams located in Northern, Upper western, and Upper central of Thailand will compete in the league of the Northern region.
The 2020–21 Thai League 3 Western region is a region in the regional stage of the 2020–21 Thai League 3. Due to the COVID-19 pandemic, the season must be postponed to start in late 2020 and end in early 2021. In addition, the Thai League 4 had combined with the Thai League 3 and compete as Thai League 3 since this season and there is no relegation in this season. A total of 12 teams located in Western, central, and Bangkok Metropolitan Region of Thailand will compete in the league of the Western region.
The 2020–21 Thai League 3 Southern region is a region in the regional stage of the 2020–21 Thai League 3. Due to the COVID-19 pandemic, the season must be postponed to start in late 2020 and end in early 2021. In addition, the Thai League 4 had combined with the Thai League 3 and compete as Thai League 3 since this season and there is no relegation in this season. A total of 12 teams located in Southern of Thailand will compete in the league of the Southern region.
The 2021–22 season is Ratchaburi Mitr Phol Football Club's 15th existence. It is the 6th season in the Thai League and the club's 9th consecutive season in the top flight of the Thai football league system since promoted in the 2013 season. Also, having finished 4th in the first half of 2020-21 Thai League 1, Ratchaburi Mitr Phol Football Club are qualified for the play-off stage of the 2021 AFC Champions League for the first time in the club's history, but after Jiangsu ceased operation, Ratchaburi Mitr Phol automatically qualified to the group stage instead alongside Pohang Steelers. In this season, Ratchaburi Mitr Phol participates in 4 competitions which consisted of the Thai League, FA Cup, League Cup, and AFC Champions League.
The 2021–22 season is Muangkan United's 1st season in Thai League 2 after promoted from Thai League 3 for the first time in the club's history in 2021. In this season, Muangkan United participates in 3 competitions which consisted of the Thai League 2, FA Cup, and League Cup.
Natan Oliveira