2020–21 Thai League 3 Western Region
| Season | 2020–21 |
|---|---|
| Dates | 3 October 2020 – 3 January 2021 |
| Champions | Muangkan United |
| T3 National Championship | Muangkan United Rajpracha |
| Matches played | 101 |
| Goals scored | 270 (2.67 per match) |
| Top goalscorer | Bireme Diouf (17 goals; Muangkan United) |
| Biggest home win | 10 goals difference Muangkan United 10–0 Thawi Watthana Samut Sakhon United (25 October 2020) |
| Biggest away win | 6 goals difference Kanjanapat 0–6 Angthong (21 October 2020) Kanjanapat 0–6 Rajpracha (4 November 2020) |
| Highest scoring | 10 goals Muangkan United 10–0 Thawi Watthana Samut Sakhon United (25 October 2020) |
| Longest winning run | 5 matches Muangkan United |
| Longest unbeaten run | 10 matches Muangkan United Rajpracha |
| Longest winless run | 11 matches Thawi Watthana Samut Sakhon United |
| Longest losing run | 7 matches Thawi Watthana Samut Sakhon United |
2021–22 → | |
The 2020–21 Thai League 3 Western region is a region in the regional stage of the 2020–21 Thai League 3. Due to the COVID-19 pandemic, the season must be postponed to start in late 2020 and end in early 2021. In addition, the Thai League 4 had combined with the Thai League 3 and compete as Thai League 3 since this season and there is no relegation in this season. A total of 12 teams located in Western, central, and Bangkok Metropolitan Region of Thailand will compete in the league of the Western region.
In late December 2020, COVID-19 had spread again in Thailand, the FA Thailand must abruptly end the regional stage of the Thai League 3.