The 2012–13 Football League One (referred to as the Npower Football League One for sponsorship reasons) was the ninth season of the league under its current title and twenty-first season under its current league division format.
The season began on 18 August 2012 and ended on 27 April 2013.
Note: Flags indicate national team as has been defined under FIFA eligibility rules.
Players may hold more than one non-FIFA nationality.