| Competition: | Thai League 1 |
| Season: | 2021–22 |
| Dates: | 3 September 2021 — 4 May 2022 |
| Winners: | Buriram United |
| Relegated: | Samut Prakan City Suphanburi Chiangmai United |
| Continentalcup1: | 2023–24 AFC Champions League |
| Continentalcup1 Qualifiers: | BG Pathum United Buriram United |
| Matches: | 240 |
| Total Goals: | 615 |
| League Topscorer: | Hamilton Soares (19 goals) |
| Biggest Home Win: | 5 goals difference (9 November 2021) |
| Biggest Away Win: | 7 goals difference (25 September 2021) |
| Highest Scoring: | 9 goals (6 April 2022) |
| Longest Wins: | 6 matches BG Pathum United Buriram United |
| Longest Unbeaten: | 16 matches BG Pathum United |
| Longest Winless: | 14 matches Chiangmai United |
| Longest Losses: | 7 matches Chiangmai United Suphanburi |
| Highest Attendance: | 23,046 (6 April 2022) |
| Lowest Attendance: | 0 |
| Attendance: | 528,431 |
| Average Attendance: | 2,481 |
| Prevseason: | 2020–21 |
| Nextseason: | 2022–23 |
| Updated: | 4 May 2022 |
The 2021–22 Thai League 1 is the 25th 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 season began on 31 July 2021 and is scheduled to conclude in May 2022.[1]
The 1st transfer window is from 4 May to 27 July 2021 while the 2nd transfer window is from 8 December 2021 to 4 January 2022.
BG Pathum United are the defending champions, while Nongbua Pitchaya, Chiangmai United and Khonkaen United have entered as the promoted teams from the 2020–21 Thai League 2.
Promoted from the 2020–21 Thai League 2
Relegated from the 2020–21 Thai League 1
There are 16 clubs in the league, with three promoted teams from Thai League 2 replacing the three teams that were relegated from the 2020-21 season.
Sukhothai, Trat and Rayong were relegated at the end of the 2020–21 season after finishing in the bottom three places of the table. They were replaced by 2020-21 Thai League 2 champions Nongbua Pitchaya. They were joined by runners-up Chiangmai United, who also got promoted for the first time and Khonkaen United, promotion playoff winner which was first held in 2020–21 season.
Note: Table lists in alphabetical order.
Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
The FIFA Transfer Window Period for Thailand was 4 May 2021 to 24 July 2021.
As of 4 May 2022.[18]
| Rank | Player | Club | Goals |
|---|---|---|---|
| 1 |  Hamilton | Nongbua Pitchaya | 19 |
| 2 | Ibson Melo | Khonkaen United | 17 |
| 3 | Heberty | Bangkok United | 15 |
| Willian Popp | Muangthong United | ||
| 5 |  Supachai Chaided | Buriram United | 14 |
| 6 | Bill | Chiangrai United (8 Goals) Chiangmai United (5 Goals) | 13 |
 Kwame Karikari | Nakhon Ratchasima | ||
| Willen Mota | PT Prachuap | ||
| Derley | Ratchaburi Mitr Phol | ||
| 10 |  Yoo Byung-soo | Chonburi | 12 |
As of 4 May 2022.[19]
| Rank | Player | Club | Assists |
|---|---|---|---|
| 1 | Pakorn Prempak | Port | 11 |
| 2 | Heberty | Bangkok United | 9 |
| 3 | Vander | Bangkok United | 7 |
| Chaowat Veerachat | BG Pathum United | ||
| Samuel | Buriram United (4) / Samut Prakan City (3) | ||
| 6 | Worachit Kanitsribampen | Chonburi (4) / BG Pathum United (2) | 6 |
| Lursan Thiamrat | Nongbua Pitchaya | ||
 Steeven Langil | Ratchaburi Mitr Phol | ||
| Player | For ! | Against | Result | Date |
|---|---|---|---|---|
| Dennis Murillo4 | Chonburi | 7–0 (A) | ||
| Chonburi | 7–0 (A) | |||
| Chiangrai United | 3–2 (A) | |||
| Port | 4–0 (A) | |||
| Ratchaburi Mitr Phol | 3–2 (H) | |||
| Ikhsan Fandi4 | BG Pathum United | 7–2 (H) | ||
| Bangkok United | 5–2 (H) | |||
As of 4 May 2022.
| Month | Coach of the Month | Player of the Month | Goal of the month | Reference | |||
|---|---|---|---|---|---|---|---|
| Coach | Club | Player | Club | Player | Club | ||
| September | Sasom Pobprasert | Chonburi | Ibson Melo | Khonkaen United | Steeven Langil | Ratchaburi Mitr Phol | |
| October | Alexandre Gama | Buriram United | Samuel Rosa | Buriram United | Hamilton | Nongbua Pitchaya | |
| November | Totchtawan Sripan | Bangkok United | Worachit Kanitsribampen | Chonburi | Naruphol Ar-romsawa | Nakhon Ratchasima | |
| January |  Masatada Ishii | Buriram United | Yoo Byung-soo | Saharat Pongsuwan | PT Prachuap | ||
| February | Issara Sritaro | PT Prachuap | Theerathon Bunmathan | Buriram United | William Henrique | Suphanburi | |
| March | Hamilton | Nongbua Pitchaya | Sarach Yooyen | BG Pathum United | [20] | ||
| April | Makoto Teguramori | BG Pathum United | Ikhsan Fandi | BG Pathum United | Heberty | Bangkok United | |
| Award | Winner | Club |
|---|---|---|
| Thai League Manager of the Year | Masatada Ishii | Buriram United |
| Thai League Most Valuable Player | Supachai Chaided | Buriram United |
| Attack | Hamilton (Nongbua Pitchaya) | Heberty (Bangkok United) | Supachai Chaided (Buriram United) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Midfield | Chaowat Veerachat (BG Pathum United) | Weerathep Pomphan (Muangthong) | Pakorn Prempak (Port) | ||||||||||
| Defence | Theerathon Bunmathan (Buriram United) | Everton (Bangkok United) |  Rebin Sulaka(Buriram United) | Santiphap Channgom (BG Pathum United) | |||||||||
| Goalkeeper | Kampol Pathomakkakul (Ratchaburi Mitr Phol) | ||||||||||||
| Team \ Match played | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 956 | 2,404 | 847 | 1,068 | 1,050 | 2,672 | 1,921 | 1,095 | 1,085 | 1,253 | 14,351 | ||
| 0 | 0 | 0 | 0 | 0 | 1,678 | 1,823 | 2,349 | 3,321 | 3,032 | 3,220 | 4,314 | 3,186 | 3,401 | 4,927 | 31,251 | ||
| 5,933 | 5,028 | 5,201 | 2,635 | 6,420 | 12,007 | 6,065 | 7,359 | 16,398 | 8,273 | 20,659 | 10,021 | 10,102 | 22,079 | 23,046 | 161,226 | ||
| 0 | 0 | 1,245 | 642 | 1,332 | 1,259 | 1,669 | 3,696 | 1,094 | 1,247 | 1,228 | 1,508 | 1,109 | 1,565 | 2,168 | 19,762 | ||
| 262 | 388 | 429 | 358 | 1,038 | 526 | 702 | 1,020 | 2,411 | 1,309 | 1,462 | 2,284 | 1,200 | 631 | 1,399 | 15,419 | ||
| 0 | 0 | 1,425 | 2,030 | 1,980 | 2,974 | 4,120 | 3,520 | 3,204 | 3,151 | 4,200 | 3,055 | 3,201 | 2,973 | 2,549 | 38,382 | ||
| 1,021 | 1,109 | 1,625 | 1,234 | 1,548 | 1,618 | 3,248 | 3,125 | 3,245 | 3,144 | 4,864 | 4,512 | 4,495 | 4,875 | 4,012 | 43,675 | ||
| 0 | 0 | 1,092 | 1,745 | 1,845 | 2,145 | 2,148 | 2,414 | 5,237 | 5,875 | 4,985 | 3,328 | 2,937 | 5,635 | 3,827 | 43,213 | ||
| 0 | 539 | 899 | 941 | 1,840 | 2,876 | 2,944 | 2,075 | 2,085 | 2,765 | 2,253 | 5,500 | 1,865 | 3,377 | 3,107 | 33,066 | ||
| 418 | 463 | 462 | 849 | 416 | 731 | 1,009 | 1,772 | 1,854 | 2,124 | 3,793 | 3,993 | 2,924 | 5,098 | 2,097 | 28,003 | ||
| 0 | 0 | 0 | 1,112 | 848 | 808 | 779 | 2,375 | 1,225 | 1,306 | 2,423 | 1,273 | 1,072 | 1,026 | 1,217 | 15,464 | ||
| 0 | 0 | 0 | 1,234 | 936 | 1,313 | 1,088 | 1,207 | 1,053 | 1,681 | 1,825 | 1,862 | 1,629 | 1,560 | 2,875 | 18,263 | ||
| 0 | 750 | 513 | 400 | 426 | 512 | 763 | 578 | 445 | 481 | 667 | 498 | 720 | 713 | 1,050 | 8,516 | ||
| 1,270 | 1,659 | 1,985 | 1,215 | 1,224 | 1,632 | 2,196 | 1,986 | 1,746 | 1,632 | 1,481 | 1,477 | 2,454 | 2,347 | 2,325 | 27,259 | ||
| 0 | 266 | 648 | 450 | 963 | 451 | 590 | 486 | 2,137 | 604 | 673 | 817 | 854 | 789 | 1,961 | 11,689 | ||
| 0 | 0 | 0 | 925 | 1,106 | 616 | 653 | 1,101 | 1,318 | 2,179 | 1,419 | 1,831 | 1,430 | 1,277 | 5,667 | 19,522 |
