The 2013 League of Ireland First Division season was the 29th season of the League of Ireland First Division.
The First Division was contested by 8 teams and Athlone Town won the title.
The 2013 First Division featured eight teams.
[2] The second and third placed First Division teams, Longford Town and Mervue United, played off to decide who would play Bray Wanderers, the eleventh placed team from the Premier Division.
Longford Town won 3–0 on penalties Bray Wanderers win 5–4 on aggregate and retained their place in the Premier Division.