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. Each team played every other team twice, totalling 28 games.
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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. The winner of this play off would play in the 2014 Premier Division.
The play-off finished 3âÂÂ3 on aggregate. Longford Town won 3âÂÂ0 on penalties
Bray Wanderers win 5âÂÂ4 on aggregate and retained their place in the Premier Division.