2020–21 Plymouth Argyle F.C. season

The 2020–21 season is Plymouth Argyle's 135th in existence and their first season back in EFL League One. Along with competing in League One, the club will also participate in the FA Cup, EFL Cup, and EFL Trophy.

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

First-team squad
Note: Flags indicate national team as has been defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.

Statistics
!colspan=14|Players who left the club:


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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. The third round draw was made on 30 November, with Premier League and EFL Championship all entering the competition. The draw for the fourth and fifth round were made on 11 January, conducted by Peter Crouch.

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.