| Competition: | Thai League 3 Northern Region |
| Season: | 2020–21 |
| Dates: | 3 October 2020 – 3 January 2021 |
| Continentalcup1: | |
| Matches: | 83 |
| Total Goals: | 203 |
| League Topscorer: | |
| Biggest Home Win: | 5 goals difference (18 November 2020) |
| Biggest Away Win: | 4 goals difference (25 October 2020) |
| Highest Scoring: | 7 goals (18 November 2020) |
| Longest Wins: | 6 matches Lamphun Warriors |
| Longest Unbeaten: | 10 matches Phitsanulok |
| Longest Winless: | 8 matches Chiangrai City Kamphaengphet Northern Tak United |
| Longest Losses: | 6 matches Northern Tak United |
| Prevseason: | 2019 (T3), 2019 (T4) |
| Nextseason: | 2021–22 |
The 2020–21 Thai League 3 Northern 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[1] and there is no relegation in this season.[2] A total of 11 teams located in Northern, Upper western, and Upper central of Thailand will compete in the league of the Northern region.[3]
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.[4] The second-placed and the third-placed of the Northern region have the similar points, so they must play-off to find a team to qualified to the national championship stage.
| Position | Province | Number | Teams | |
|---|---|---|---|---|
| align=center rowspan="2" | 1 | 2 | Chiangrai City and Chiangrai Lanna | |
| 2 | Phitsanulok and Wat Bot City | |||
| align=center rowspan="7" | 2 | 1 | Maejo United | |
| 1 | Kamphaengphet | |||
| 1 | Lamphun Warriors | |||
| 1 | See Khwae City | |||
| 1 | Nan | |||
| 1 | Northern Tak United | |||
| 1 | Uttaradit |
A T3 team could register four foreign players by at least one player from AFC member countries. A team can use four foreign players on the field in each game, including at least one player from the AFC member countries (3+1).
Note :
: players who released during winter transfer window;
: players who registered during winter transfer window;
↔: players who have dual nationality by half-caste or naturalization.
→: players who left club after registered during first or second leg.
| Other foreign players. | ||
| AFC quota players. | ||
| No foreign player registered. |
| Club | Leg | Player 1 | Player 2 | Player 3 |
|---|---|---|---|---|
| Chiangrai City | 1st | |||
| 2nd | ||||
| Chiangrai Lanna | 1st | |||
| 2nd | ||||
| Kamphaengphet | 1st | |||
| 2nd | ||||
| Lamphun Warriors | 1st | |||
| 2nd | ||||
| 1st | ||||
| 2nd | ||||
| Nan | 1st | |||
| 2nd | ||||
| 1st | ||||
| 2nd | ||||
| Phitsanulok | 1st | |||
| 2nd | ||||
| See Khwae City | 1st | |||
| 2nd | ||||
| Uttaradit | 1st | |||
| 2nd | ||||
| Wat Bot City | 1st | |||
| 2nd |
As of 3 January 2021.
| Rank | Player | Club | Goals | |
|---|---|---|---|---|
| 1 |  Natan Oliveira | Lamphun Warriors | 12 | |
| Rafinha | Wat Bot City | |||
| 3 |  Chatchai Narkwijit | Phitsanulok | 9 | |
| 4 | Nattapong Meemanee | Nan | 8 | |
| Ekue Andre Houma | See Khwae City | |||
| 6 | Suriphat Thaensopha | Chiangrai City | 7 | |
| Wichaya Pornprasart | Maejo United | |||
| 8 |  Koki Narita | Phitsanulok | 6 |
| Player | For | Against | Result | Date | |
|---|---|---|---|---|---|
| Natan Oliveira | 4–0 (A) | ||||
| 6–1 (H) | |||||
| 4–0 (H) | |||||
| 5–1 (H) | |||||
| Suriphat Thaensopha | 5–1 (H) |
As of 3 January 2021.
| Rank | Player | Club | Clean sheets |
|---|---|---|---|
| 1 | Adisak Duangsri | Lamphun Warriors | 10 |
| 2 | Watchara Panmoon | Maejo United | 7 |
| 3 | Kritsada Nonchai | Phitsanulok | 6 |
| 4 | Jiraphat Kamon | Nan | 4 |
| 5 | Sutthimat Tibbanhan | Chiangrai City | 3 |
| Jirasak Kunnapan | Kamphaengphet | ||
| Sarayut Khongcharoen | Wat Bot City |