2023–24 Thai League 1

The 2023–24 Thai League 1 was the 27th season of the Thai League 1, the top Thai professional league for association football clubs, since its establishment in 1996, also known as Hilux Revo Thai League due to the sponsorship deal with Toyota Motor Thailand. A total of 16 teams will compete in the league.

The 1st transfer window is from 25 May to 9 August 2022 while the 2nd transfer window is from 19 December 2022 to 17 January 2023.

Buriram United are the defending champions, while Nakhon Pathom United, Trat, and Uthai Thani have entered as the promoted teams from the 2022–23 Thai League 2.

Promoted clubs
Promoted from the 2022–23 Thai League 2
 * Nakhon Pathom United
 * Trat
 * Uthai Thani

Relegated clubs
Relegated from the 2022–23 Thai League 1
 * Nakhon Ratchasima
 * Nongbua Pitchaya
 * Lampang

Teams
There are 16 clubs in the league, with three promoted teams from Thai League 2 replacing the three teams that were relegated from the 2022-23 season.

Nakhon Ratchasima, Nongbua Pitchaya and Lampang were relegated at the end of the 2022–23 season after finishing in the bottom three places of the table. Lampang made their immediate return to the second-tier, Nongbua Pitchaya ended a 2-year stint in the top-flight, while Nakhon Ratchasima ended an 8-year tenure in the top-flight. The three were replaced by 2022-23 Thai League 2 champions Nakhon Pathom United, who are returning to the top-flight after a 14-year exile that saw them participating in the lowest tier of Thai professional football in the 2018 season. They were joined by runners-up Trat, who are returning to the top-flight after 2 years away and Uthai Thani, the promotion playoff winner which was first held in 2020–21 season. While the 2023-24 season will be Uthai Thani’s debut in the top-flight, their predecessors Air Force United were last featured in the top-flight back in the 2018 season.

Stadium and locations

 * Note: Table lists in alphabetical order.

Personnel and sponsoring
Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Foreign players
The FIFA Summer Transfer Window period for Thailand was held on 15 May to 4 August 2023 and Winter Transfer Window was held ob 27 December 2023 to 26 January 2024.

Each team can register a maximum of 9 foreign players. Of these, 1 must be from the AFC Confederation and no more than 3 can be from the ASEAN Confederation.

Players name in bold indicates the player was registered during the Winter Transfer Window.

Dual citizenship/heritage players
Overseas Thai players whom have obtained a Thai passport are regarded as local players.

 Notes: 
 * Carrying Thai heritage.
 * Capped for Thailand.

Top scorers

 * As of 26 May 2024.

Clean sheets

 * As of 26 May 2024.

Attendances by home match played
Source: Thai League