2020–21 Gillingham F.C. season

The 2020–21 season was Gillingham's 128th season in their history and the eighth consecutive season in EFL League One. Along with League One, the club participated in the 2020–21 FA Cup, 2020–21 EFL Cup and 2020–21 EFL Trophy.

The season covered the period from 1 July 2020 to 30 June 2021.

Matches
The 2020–21 season fixtures were released on 21 August.

FA Cup
The draw for the first round was made on Monday 26, October. The second round draw was revealed on Monday, 9 November by Danny Cowley.

EFL Cup
The first round draw was made on 18 August, live on Sky Sports, by Paul Merson. The draw for both the second and third round were confirmed on September 6, live on Sky Sports by Phil Babb.

EFL Trophy
The regional group stage draw was confirmed on 18 August. The second round draw was made by Matt Murray on 20 November, at St Andrew's.