The 2021–22 EFL League One (referred to as the Sky Bet League One for sponsorship reasons) was the 18th season of the Football League One under its current title and the 30th season under its current league division format.
The following teams have changed division since the 2020–21 season: Promoted from League Two Relegated from the Championship
Promoted to the Championship Relegated to League Two
First leg Gape 31' Second leg Wycombe Wanderers won 2–1 on aggregate.
Sunderland won 2–1 on aggregate.