| Season: | 2020–21 |
| Dates: | 14 February 2020 — 31 March 2021(excluding play-off) |
| Winners: | Nongbua Pitchaya |
| League Topscorer: | Paulo Conrado (25 goals) |
| Biggest Home Win: | 7 goals difference (10 March 2021) |
| Biggest Away Win: | 6 goals difference (10 February 2021) (20 March 2021) |
| Highest Scoring: | 7 goals difference (16 February 2020) (29 November 2020) (19 December 2020) (10 March 2021) |
| Highest Attendance: | 5,218 (16 February 2020) |
| Lowest Attendance: | 0 |
| Attendance: | 249,625 |
| Average Attendance: | 1,071 |
| Matches: | 306 |
| Total Goals: | 840 |
| Updated: | 31 March 2021 |
The 2020–21 Thai League 2 is the 23nd 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 14 February 2020 and is scheduled to conclude on 31 March 2021.
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 19 November 2019 to 10 February 2020 while the 2nd transfer window is from 15 June 2020 to 12 July 2020.
The following teams have changed division since the 2019 season.
| Team | Location | Stadium | Capacity |
|---|---|---|---|
| Ayutthaya United | Ayutthaya | Ayutthaya Provincial Stadium | 6,000 |
| Chainat Hornbill | Chainat | Khao Plong Stadium | 8,625 |
| Chiangmai | Chiang Mai | Chiangmai Municipality Stadium | 5,000 |
| Chiangmai United | Chiang Mai | Rajamangala University of technology lanna Stadium (DoiSaket) | 2,500 |
| Customs United | Samut Prakan | Customs Department Stadium, Ladkrabang 54 | 2,000 |
| Kasetsart | Bangkok | TOT Stadium Chaeng Watthana | 5,000 |
| Khonkaen | Khon Kaen | Khonkaen PAO. Stadium | 7,000 |
| Khonkaen United | Khon Kaen | Khonkaen PAO. Stadium | 7,000 |
| Lampang | Lampang | Lampang Provincial Stadium | 5,500 |
| Nakhon Pathom | Nakhon Pathom Municipality Sport School Stadium | 6,000 | |
| Navy | Chonburi | Sattahip Navy Stadium | 6,000 |
| Nongbua Lamphu | Pitchaya Stadium | 6,000 | |
| Phrae United | Phrae | Huai Ma Stadium | 2,500 |
| Ranong United | Ranong | Ranong Provincial Stadium | 7,000 |
| Samut Sakhon | Samut Sakhon Provincial Stadium | 3,500 | |
| Sisaket | Sisaket | Sri Nakhon Lamduan Stadium | 10,000 |
| Udon Thani | Udon Thani | 4,000 | |
| Uthai Thani | Uthai Thani | Uthai Thani Province Stadium | 4,477 |
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.
| Team | Outgoing manager | Manner of departure | Date of vacancy | Week | Table | Incoming manager |
|---|---|---|---|---|---|---|
| Lampang |  Punnakan Chiratkankun | Sacked | 6 March 2020 | 4 | 13 | Prasert Changmoon |
| Khonkaen | Sirisak Yodyardthai | Signed by BG Pathum United Academy | 23 May 2020 | 4 | 16 | Jakkrit Bunkham |
| Kasetsart | Somdet Hitates | Resigned | 10 July 2020 | 4 | 12 | Warit Boonsripitayanon |
| Sisaket | Worachai Surinsirirat | Mutual consent | 5 August 2020 | 4 | 8 | Chusak Sriphum |
| Udon Thani | Jakarat Tonhongsa | Signed by Muangthong United Academy | 25 August 2020 | 4 | 14 | Jetsada Jitsawad |
| Uthai Thani | Thanaset Amornsinkittichote | Resigned | 27 September 2020 | 8 | 18 | Therdsak Chaiman |
| Sisaket | Chusak Sriphum | Resigned | 29 September 2020 | 8 | 15 | Preeda Chankra |
| Chiangmai United |  Carlos Eduardo Parreira | Resigned | 30 October 2020 | 11 | 2 | Dennis Amato |
| Customs United | Worrawoot Srimaka | Resigned | 14 November 2020 | 13 | 14 | Santi Songte |
| Khon Kaen United |  Sugao Kambe | Sacked | 8 March 2021 | 27 | 3 | Patipat Robroo |
Players name in bold indicates the player was registered during the mid-season transfer window.
Khon Kaen United won 5–2 on aggregate.----Nakhon Pathom United won 4–1 on aggregate.
3–3 on aggregate. Khon Kaen United won 4–3 on penalties.
As of 31 March 2021.
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 | Paulo Conrado | Khonkaen United | 25 |
| 2 |  Yoo Byung-soo | Customs United (2 Goals) Ayutthaya United (20 Goals) | 22 |
| Tauã | Nakhon Pathom United | ||
| 4 | Melvin de Leeuw | Chiangmai United | 17 |
| 5 | Ryo Matsumura | Chiangmai | 16 |
| 6 | Erivelto | Navy (8 Goals) Chainat Hornbill (6 Goals) | 14 |
| Valdo | Nongbua Pitchaya | ||
| 8 | Jeong Woo-geun | Chiangmai United | 13 |
| 9 | Seiya Sugishita | Khonkaen | 12 |
| Jiraphan Phasukhan | Nakhon Pathom United | ||
| Player | For ! | Against | Result | Date |
|---|---|---|---|---|
| Uthai Thani | 3–3 (H) | |||
| Khonkaen United | 4–2 (A) | |||
| Khonkaen United | 3–3 (A) | |||
| Chiangmai United | 6–0 (H) | |||
| Nakhon Pathom United | 5–1 (H) | |||
| Sisaket | 4–2 (A) | |||
| Njiva Rakotoharimalala4 | Nongbua Pitchaya | 5–0 (A) | ||
| João Paulo4 | Udon Thani | 5–2 (A) | ||
| Kasetsart | 4–1 (A) | |||
| Ranong United | 6–0 (A) | |||
| Apiwit Samurmuen | Kasetsart | 3–1 (H) | ||
| Nongbua Pitchaya | 5–1 (H) | |||
| Ayutthaya United | 4–1 (A) | |||
| Chainat Hornbill | 7–1 (H) | |||
| Customs United | 3–0 (A) | |||
| Nakhon Pathom United | 6–0 (H) | |||
| Ayu Lateh | Lampang | 7–1 (A) | ||
As of 24 April 2021.
| Rank | Player | Club | Cleansheets | |
|---|---|---|---|---|
| 1 | Kittikun Jamsuwan | Nongbua Pitchaya | 21 | |
| 2 | Nont Muangngam | Chiangmai United | 16 | |
| 3 | Nopphon Lakhonphon | Nakhon Pathom United | 11 | |
| Pathomtat Sudprasert | Phrae United | |||
| 5 | Narit Taweekul | Khon Kaen | 10 | |
| Jirawat Wangtapan | Khon Kaen United | |||
| 7 | Korraphat Nareechan | Chiangmai | 9 | |
| 8 | Kittipun Saensuk | Chainat Hornbill | 7 | |
| Piyawat Intarapim | Samut Sakhon (2), MOF Customs United (5) | |||
| Prin Goonchorn | Sisaket | |||
| Pisan Dorkmaikaew | MOF Customs United (2), Uthai Thani (5) | |||
| 12 | Boonyakait Wongsajaem | Navy | 6 | |
| Wichaya Ganthong | Ranong United | |||
| 14 | Tatpicha Aksornsri | Ayutthaya United | 5 |
| Team \ Match played | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1,873 | 1,441 | 831 | 883 | 1,056 | 892 | 713 | 756 | 0 | 0 | 0 | 0 | 575 | 531 | 437 | 420 | 491 | 10,899 | ||
| 1,992 | 1,372 | 1,781 | 1,559 | 1,336 | 1,022 | 1,013 | 1,129 | 0 | 0 | 0 | 0 | 912 | 1,317 | 1,682 | 1,142 | 2,315 | 18,572 | ||
| 2,425 | 2,537 | 704 | 689 | 543 | 1,240 | 1,126 | 987 | 1,498 | 0 | 0 | 0 | 0 | 692 | 730 | 991 | 1,105 | 15,267 | ||
| 1,451 | 1,519 | 389 | 284 | 339 | 323 | 304 | 340 | 0 | 0 | 0 | 0 | 319 | 480 | 526 | 699 | 750 | 7,723 | ||
| 615 | 400 | 480 | 320 | 580 | 580 | 300 | 300 | 500 | 0 | 0 | 0 | 0 | 585 | 200 | 480 | 580 | 5,920 | ||
| 372 | 345 | 1,102 | 972 | 931 | 406 | 542 | 840 | 0 | 0 | 0 | 0 | 492 | 672 | 472 | 522 | 7,668 | |||
| 4,155 | 3,794 | 1,135 | 1,235 | 1,230 | 3,138 | 3,020 | 2,369 | 0 | 0 | 0 | 0 | 1,373 | 1,227 | 1,215 | 1,246 | 1,926 | 27,063 | ||
| 5,218 | 5,031 | 1,594 | 1,587 | 1,574 | 3,049 | 3,016 | 3,163 | 3,048 | 0 | 0 | 0 | 0 | 1,590 | 1,587 | 2,965 | 2,494 | 37,506 | ||
| 823 | 915 | 1,059 | 724 | 680 | 372 | 580 | 510 | 245 | 0 | 0 | 0 | 0 | 245 | 228 | 375 | 420 | 7,176 | ||
| 1,625 | 1,250 | 710 | 650 | 721 | 1,350 | 708 | 732 | 0 | 0 | 0 | 0 | 650 | 680 | 550 | 747 | 1,100 | 11,473 | ||
| 1,275 | 1,260 | 788 | 1,134 | 690 | 619 | 709 | 661 | 0 | 0 | 0 | 0 | 726 | 398 | 618 | 775 | 572 | 10,225 | ||
| 1,692 | 1,623 | 718 | 593 | 725 | 1,524 | 1,224 | 2,901 | 827 | 0 | 0 | 0 | 1,100 | 1,000 | 2,607 | 1,800 | 3,098 | 21,432 | ||
| 914 | 1,237 | 658 | 695 | 698 | 924 | 596 | 701 | 729 | 0 | 0 | 0 | 0 | 519 | 567 | 601 | 1,029 | 9,868 | ||
| 1,200 | 1,250 | 600 | 650 | 720 | 568 | 836 | 578 | 450 | 0 | 0 | 0 | 630 | 660 | 910 | 960 | 1,018 | 11,030 | ||
| 875 | 658 | 393 | 322 | 352 | 220 | 345 | 327 | 172 | 0 | 0 | 0 | 0 | 0 | 100 | 0 | 49 | 3,813 | ||
| 3,540 | 2,164 | 1,547 | 1,535 | 2,090 | 1,002 | 805 | 403 | 562 | 120 | 0 | 0 | 0 | 672 | 1,003 | 1,108 | 1,620 | 18,171 | ||
| 2,844 | 1,335 | 1,500 | 1,500 | 1,500 | 642 | 717 | 1,191 | 527 | 0 | 0 | 0 | 0 | 447 | 552 | 978 | 13,733 | |||
| 2,348 | 2,680 | 588 | 485 | 810 | 1,066 | 320 | 503 | 453 | 0 | 0 | 0 | 0 | 450 | 708 | 925 | 750 | 12,086 |
Anders Viktor Löfgren
Armah Vaikainah 
Mehdi Chahjouyi
David Cuerva
Badar Ali Rashid Ali Al Alawi
Tomas Maricic 
Kaham Seuntcha Mardochee
Selwan Al Jaberi
Julius Chukwuma Ononiwu 
