The 2020–21 season is Bangkok United Football Club's 12th in the new era since they took over from Bangkok University Football Club in 2009.

It is the 5th season in the Thai League and the club's 10th (8th consecutive) season in the top flight of the Thai football league system since returning in the 2013 season.

In the league, match 5–30 are postponed following the coronavirus outbreak.

[1] Note 1: Bonilla will join Port on an initial loan deal, which will become a permanent transfer when his contract with Bangkok United is up in 31/12/2020.

Win Draw Loss 2020 Asia Cup Last updated: 7 April 2021 Source: Competitions Last updated: 7 April 2021Source: Competitions Last updated: 7 April 2021Source: Competitions Last updated: 7 April 2021Source: Competitions Last updated: 7 April 2021Source: Competitions