| Competition: | Thai Women's League |
| Season: | 2020–21 |
| Winners: | BG Bundit Asia (4th title) |
| Prevseason: | 2019 |
| Nextseason: | 2021–22 |
The 2020–21 Thai Women's League 1 will be the sixth season of the Thai Women's League, the top Thai professional league for women's association football clubs, since its establishment in 2009. A total of 8 teams will compete in the league. The season will run from 31 October 2020 to 27 March 2021[1]
Divided into teams placed around the league (Member organizations that are Semi-Final in 2019 Thai Women's League) 4 teams.[2]
And teams from the 2020–21 Thai Women's League play-offs round. 4 teams.[3]
The 2020–21 Thai Women's League 1 will divide the competition into 2 legs, in the first leg will compete in a meeting, compete at High Performance Training Center (Thailand), where the 1st leg is placed 1–4.Second leg will compete in a meet again Home-Away, within 1–4 places with each other to find the winning team, while 5–8 places at the end of the first leg will compete as a home-away match. And meet each other within the 5th–8th place as well. For the 6th – 7th place will compete in the playoff round with the 2nd – 3rd place from the 2020–21 Thai Women's League 2.[4]