2023–24 Thai League 2

The 2023–24 Thai League 2 is the 26th season of the Thai League 2, the second-tier professional league for Thailand's association football clubs, since its establishment in 1997. A total of 18 teams will compete in the league. The season began on 11 August 2023 and is scheduled to conclude on 23 June 2024.

For this season two teams in the final table (champion and runner up) directly promoted to Thai League 1 next season while teams ranked 3rd – 6th qualified in play off for last spot in top tier next season.

The 1st transfer window is from 15 May to 4 August 2023 while the 2nd transfer window is from 27 December 2022 to 26 January 2024.

Team changes
The following teams have changed division since the 2022–23 season.

To Thai League 2

 * Promoted from Thai League 3


 * Chanthaburi
 * DP Kanchanaburi
 * Pattaya United
 * Relegated from Thai League 1


 * Nakhon Ratchasima
 * Nongbua Pitchaya
 * Lampang

From Thai League 2

 * Promoted to Thai League 1


 * Nakhon Pathom
 * Trat
 * Uthai Thani


 * Relegated to Thai League 3


 * Rajpracha
 * Ranong United


 * Relegated to Thailand Amateur League


 * Udon Thani

Renamed Clubs

 * Pattaya Dolphins United renamed to Pattaya United

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; Club dissolved during season would shown by grey background.

Foreign players
Players name in bold indicates the player was registered during the mid-season 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.

Semi-finals
Nakhon Si United won 3–2 on aggregate.

Rayong won 5–3 on aggregate.

Finals
''1–1 on aggregate. Rayong won on away goal.''

Top scorers

 * As of 27 April 2024.

Clean sheets

 * As of 27 April 2024.

Attendances by home match played
Note: Unk.1 Some error of T2 official match report 2 September 2023 (Chainat Hornbill 1–2 Phrae United).