2019 Thai League 1
The 2019 Thai League 1 is the 23rd season of the Thai League 1, the top Thai professional league for association football clubs, since its establishment in 1996, also known as Toyota 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 22 February 2019 and is scheduled to conclude on 27 October 2019.
Buriram United are the defending champions, while PTT Rayong, Trat and Chiangmai have entered as the promoted teams from the 2018 Thai League 2.
The 1st transfer window is from 26 November 2018 to 19 February 2019 while the 2nd transfer window is from 24 June 2019 to 19 July 2019.
Chiangrai United won the league for the first time in history, this is the first time since 2007 that neither Muangthong United nor Buriram United were not crowned champions.
Changes from last season
Team changes
Promoted clubs
Promoted from the 2018 Thai League 2- PTT Rayong
- Trat
- Chiangmai
Relegated clubs
- Bangkok Glass
- Police Tero
- Navy
- Ubon United
- Air Force Central
Renamed clubs
- Pattaya United was renamed to Samut Prakan City, and relocated to Samut Prakan
Teams
Stadium and locations
| Team | Province | Stadium | Capacity | |
| Bangkok United | Pathum Thani | Thammasat Stadium | 19,375 | |
| Buriram United | Buriram | Chang Arena | 32,600 | |
| Chainat Hornbill | Chainat | Khao Plong Stadium | 8,625 | |
| Chiangmai | Chiangmai | 700th Anniversary Stadium | 20,000 | |
| Chiangrai United | Chiangrai | Singha Stadium | 13,000 | |
| Chonburi | Chonburi | Chonburi Stadium | 8,680 | |
| Muangthong United | Nonthaburi | SCG Stadium | 12,505 | |
| Nakhon Ratchasima | Nakhon Ratchasima | 80th Birthday Stadium | 24,641 | |
| Port | Bangkok | PAT Stadium | 8,000 | |
| PT Prachuap | Sam Ao Stadium | 5,000 | ||
| PTT Rayong | Rayong | PTT Stadium | 12,161 | |
| Ratchaburi Mitr Phol | Ratchaburi | Mitr Phol Stadium | 10,000 | |
| Samut Prakan City | Samut Prakan | Samut Prakarn SAT Stadium | 5,130 | |
| Sukhothai | Sukhothai | Thung Thalay Luang Stadium | 8,000 | |
| Suphanburi | Suphanburi | Suphan Buri Provincial Stadium | 15,279 | |
| Trat | Trat | Trat Provincial Stadium | 5,000 |
Stadium changes
- Due to Samut Prakan City relocation from Pattaya, they will use the Samut Prakarn Stadium, which will also be used by Samut Prakan whom play in Thai League 4.
- Chiangmai used the Singha Stadium in Chiangrai from August until September, returning to their home ground for the final game of the season.
- Chonburi used the Sattahip Navy Stadium in Chonburi for the visit of Chainat for the final game of the season.
Personnel and sponsoring
| Team | Head coach | Captain | Kit manufacturer | Shirt sponsors |
| Bangkok United |  Alexandré Pölking |  Anthony Ampaipitakwong | Ari | True Huawei Daikin CP Smart Heart Toyota Ziebart Euro Cake |
| Buriram United |  Božidar Bandović | Suchao Nuchnum | Made by club Ari | Chang Grab ITALTHAI Coca-Cola Muang Thai King Power Yamaha Thai AirAsia I-Mobile TrueVision CP Amari Hotel Jele |
| Chainat Hornbill |  Dennis Amato | Parinya Utapao | Warrix | Wangkanai AirAsia Kubota |
| Chiangmai | Surapong Kongthep | Suwannapat Kingkaew | Volt | Leo Bangkok Airways |
| Chiangrai United | Ailton Silva | Tanasak Srisai | FBT | Leo Bangkok Airways TOA |
| Chonburi | Sasom Pobprasert | Kroekrit Thaweekarn | Nike | Chang Euro Cake |
| Muangthong United | Alexandre Gama | Teerasil Dangda | Grand Sport | SCG Yamaha Coca-Cola AIA Herbalife Nutrition I-Mobile Gulf |
| Nakhon Ratchasima | Chalermwoot Sa-ngapol | Chalermpong Kerdkaew | Versus | Mazda Leo CP Central Plaza Gulf |
| Port | Choketawee Promrut |  David Rochela | Grand Sport | Muang Thai Insurance AirAsia CP |
| PT Prachuap | Thawatchai Damrong-Ongtrakul | Adul Muensamaan | Warrix | PTG Euro Cake 2Gear |
| PTT Rayong | Teerasak Po-on | Apipoo Suntornpanavej | Warrix | PTT Group |
| Ratchaburi Mitr Phol | Nuengrutai Srathongvian | Philip Roller | Made by club | Mitr Phol Kubota Chang Euro Cake |
| Samut Prakan City |  Tetsuya Murayama | Peeradon Chamratsamee | Ari | Sanwa AirAsia |
| Sukhothai | Pairoj Borwonwatanadilok |  John Baggio | Mawin | Chang Carabao CP |
| Suphanburi |  Adebayo Gbadebo | Natthaphong Samana | Warrix | Chang True |
| Trat | Phayong Khunnaen |  Bireme Diouf | Grand Sport | CP Chang |
Managerial changes
Foreign Players
League table
Positions by round
Results by match played
Results
Season statistics
Top scorers
| Rank | Player | Club | Goals |
| 1 |  Lonsana Doumbouya | Trat | 20 |
| 2 |  Nelson Bonilla | Bangkok United | 16 |
| 3 | Leandro Assumpção | Nakhon Ratchasima | 15 |
| 3 | Ibson Melo | Samut Prakan City | 15 |
| 5 | Bill | Chiangrai United | 14 |
| 5 | Heberty | Muangthong United | 14 |
| 5 | Yannick Boli | Ratchaburi Mitr Phol | 14 |
| 8 | Caion | PT Prachuap Chonburi | 13 |
| 9 | Eliandro | Chiangmai | 12 |
| 9 | Bernard Doumbia | Nakhon Ratchasima | 12 |
Top assists
| Rank | Player | Club | Assists |
| 1 | Heberty | Muangthong United | 17 |
| 2 | Jakkapan Pornsai | Ratchaburi Mitr Phol | 10 |
| 3 | Vander | Bangkok United | 8 |
| 4 | Sanrawat Dechmitr | Bangkok United | 7 |
| 4 | Kroekrit Thaweekarn | Chonburi | 7 |
| 4 | Amadou Ouattara | Nakhon Ratchasima | 7 |
| 4 | Sergio Suárez | Port | 7 |
| 4 |  Steeven Langil | Ratchaburi Mitr Phol | 7 |
| 9 | Ekanit Panya | Chiangrai United | 6 |
| 9 | Saharat Kanyaroj | PTT Rayong | 6 |
| 9 | Philip Roller | Ratchaburi Mitr Phol | 6 |
| 9 | Teeraphol Yoryoei | Samut Prakan City | 6 |
| 9 |  Ian Ramsay | Sukhothai | 6 |
Hat-tricks
Clean sheets
| Rank | Player | Club | Clean sheets |
| 1 | Siwarak Tedsungnoen | Buriram United | 14 |
| 2 | Sinthaweechai Hathairattanakool | Suphanburi/Chonburi | 11 |
| 3 | Apirak Woravong | Chiangrai United | 10 |
| 4 | Peerapong Ruenin | PTT Rayong | 9 |
| 5 | Michael Falkesgaard | Bangkok United | 7 |
| 5 |  Đặng Văn Lâm | Muangthong United | 7 |
| 7 | Worawut Srisupha | Port | 6 |
| 7 | Kwanchai Suklom | PT Prachuap | 6 |
| 7 | Kittikun Jamsuwan | Sukhothai | 6 |
| 10 | Ukrit Wongmeema | Ratchaburi Mitr Phol | 4 |
| 10 | Patiwat Khammai | Samut Prakan City | 4 |
| 10 | Patrick Deyto | Suphanburi | 4 |
| 10 | Todsaporn Sri-reung | Trat | 4 |