2022–23 Thai League 2

The 2022–23 Thai League 2 is the 25th season of the Thai League 2, the second-tier professional league for Thailand's association football clubs, since its establishment in 1997, also known as M-150 Championship due to the sponsorship deal with M-150. A total of 18 teams will compete in the league. The season began on 12 August 2022 and is scheduled to conclude on 27 May 2023.

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

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

To Thai League 2

 * Promoted from Thai League 3


 * Uthai Thani
 * Krabi
 * Nakhon Si United
 * Relegated from Thai League 1


 * Suphanburi
 * Samut Prakan City
 * Chiangmai United

From Thai League 2

 * Promoted to Thai League 1


 * Lamphun Warriors
 * Sukhothai
 * Lampang


 * Relegated to Thai League 3


 * Khonkaen
 * Navy


 * Relegated to Thailand Amateur League


 * Muangkan United

Renamed Clubs

 * Customs Ladkrabang United renamed to Customs United

Personnel
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
''2–2 on aggregate. Customs United won on away goals.''

Uthai Thani won 5–4 on aggregate.

Finals
Uthai Thani won 5–2 on aggregate.

Top scorers

 * As of 30 April 2023.

Clean sheets

 * As of 30 April 2023.