The season began on 22 February 2019 and is scheduled to conclude on 27 October 2019.
[1] Buriram United are the defending champions, while PTT Rayong, Trat and Chiangmai have entered as the promoted teams from the 2018 Thai League 2.
The table lists the positions of teams after each week of matches.
In order to preserve chronological evolvements, any postponed matches are not included in the round at which they were originally scheduled, but added to the full round they were played immediately afterwards.
For example, if a match is scheduled for matchday 13, but then postponed and played between days 16 and 17, it will be added to the standings for day 16. sheets Updated to games played on 26 October 2019Source: Thai LeagueNotes:† Teams played previous season in Thai League 2 Source: Thai League Archived 2019-04-03 at the Wayback Machine