2017–18 EFL League One

The 2017–18 EFL League One (referred to as the Sky Bet League One for sponsorship reasons) was the 14th season of the Football League One under its current title, and the 25th season under its current league division format.

Team changes
The following teams have changed division since the 2016–17 season.

To League One
Promoted from League Two
 * Portsmouth
 * Plymouth Argyle
 * Doncaster Rovers
 * Blackpool

Relegated from Championship
 * Blackburn Rovers
 * Wigan Athletic
 * Rotherham United

From League One
Promoted to Championship
 * Sheffield United
 * Bolton Wanderers
 * Millwall

Relegated to League Two
 * Port Vale
 * Swindon Town
 * Coventry City
 * Chesterfield