The Thai League 2 (Thai: ลีก ลีก 2), commonly referred to as T2, is the second professional football league in Thailand. The first three clubs will be promoted to the Thai League at the end of the season , while the last three will be relegated to the Thai League 3 .
↑ Air Force United has withdrawn from the league. For this, Uthai Thani FC will play from the 2020 season
↑ Nakhonpathom United was transferred to the Thai League 4 because they had not submitted the documents required for licensing to the association in time.
↑ Army finished 9th with a tie because of the direct comparison against Chiangmai FC.
↑ After the end of the 2019 season, Army United withdrew from the Thai League.
↑ Chiangmai FC took 10th place with a tie due to the lost direct comparison against Army United.
↑ 3 points were deducted from Krabi due to irregularities in the contract with Norihiro Kawakami.
↑ Samutsongkhram FC was transferred to the Thai League 4 because they had not submitted the documents required for licensing to the association in time.
↑ Trat FC took 15th place with a tie due to the direct comparison against Sonkhla United.
↑ Songkhla United finished 16th with a tie due to the lost direct comparison against Trat FC.
↑ In April 2017 the association was dissolved for financial reasons and banned for 2 years. After 2 years the club could start again in the Thai League 4.
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Sisaket FC was deducted 12 points due to the decision of FIFA.
↑ After the end of the 2019 season, Thai Honda FC withdrew from the Thai League.
↑ The club was renamed from JL Chiangmai United FC to Chiangmai United FC at the end of 2019.