2021–22 Thai League 2
| Season | 2021–22 |
|---|---|
| Dates | 3 September 2021 — 28 May 2022 |
| Champions | Lamphun Warriors |
| Promoted | Lamphun Warriors Sukhothai Lampang |
| Relegated | Muangkan United Khonkaen Navy |
| Matches played | 306 |
| Goals scored | 869 (2.84 per match) |
| Top goalscorer | Thales Lima (22 goals) |
| Biggest home win | 6 goals difference Lampang 7–1 Khonkaen (5 March 2022) |
| Biggest away win | 6 goals difference Customs Ladkrabang United 3–9 Udon Thani (17 November 2021) Chiangmai 0–6 Lampang (26 March 2022) |
| Highest scoring | 12 goals difference Customs Ladkrabang United 3–9 Udon Thani (17 November 2021) |
| Longest winning run | 8 matches Lamphun Warriors |
| Longest unbeaten run | 21 matches Trat |
| Longest winless run | 18 matches Navy |
| Longest losing run | 8 matches Navy |
| Highest attendance | 4,529 Lamphun Warriors 2–0 Rajpracha (24 April 2022) |
| Lowest attendance | 0 |
| Total attendance | 162,177 |
| Average attendance | 634 |
← 2020–21 2022–23 →
All statistics correct as of 30 April 2022. | |
The 2021–22 Thai League 2 is the 24th 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 is scheduled to begin on 14 August 2021 and is scheduled to conclude on 22 May 2022.
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 4 May 2021 to 27 July 2021 while the 2nd transfer window is from 8 December 2021 to 4 January 2022.