Thai League 1
| Organising body | Thai League Co., Ltd |
|---|---|
| Founded | 1996 |
| First season | 1996–97 |
| Country | Thailand |
| Confederation | AFC |
| Number of clubs | 16 |
| Level on pyramid | 1 |
| Relegation to | Thai League 2 |
| Domestic cup(s) | Thai FA Cup Thailand Champions Cup |
| League cup(s) | Thai League Cup |
| International cup(s) | |
| Current champions | Buriram United (11th title) (2024–25) |
| Most championships | Buriram United (11 titles) |
| Most appearances | Rangsan Viwatchaichok (439) |
| Top goalscorer | Heberty (159) |
| Broadcaster(s) | TrueVisions |
| Website | thaileague |
| Current: 2025–26 Thai League 1 | |
The Thai League (Thai: ไทยลีก, pronounced as ไท-หลีก) or Thai League 1 (Thai: ไทยลีก 1, pronounced as ไท-หลีก-หนึ่ง), often referred to as T1, is the highest level of the Thai football league system. Contested by 16 clubs, it operates on a system of promotion and relegation with Thai League 2. Seasons typically run from August to May, with each team playing 30 games: two against each other team, one home and one away. It is sponsored by Toyota Motor Thailand and therefore officially known as the Hilux Revo Thai League. In the Thai League, most games are played on Saturday and Sunday evenings, occasionally being played on Wednesday and Friday evening fixtures.