It was Brentford's inaugural season in the Football League and ended with the club successfully applying for re-election.

[2] The goalscoring of former Arsenal forward Harry King provided one of the rare bright spots of the season, with his 18 goals accounting for nearly half that of the team's total.

[5] King also became the first Brentford player to register a Football League hat-trick in a 5–0 thrashing of Grimsby Town on 28 March 1921,[5] the Bees' biggest win of the season.

[3] The result established the club record for the highest winning margin in a Football League match, which would stand until broken in September 1929.

[6] Secretary manager Fred Halliday stood down after the season and reverted to an administrative role within the club.