2005 League of Ireland First Division

The 2005 League of Ireland First Division season was the 21st season of the League of Ireland First Division.

Overview
The First Division was contested by 10 teams and Sligo Rovers won the division, finishing two points clear of Dublin City. Each team played the other teams four times, totalling 36 games.

Promotion/relegation play-off
Dublin City who finished second in the First Division played off against Shamrock Rovers who finished eleventh in the Premier Division.
 * 1st Leg


 * 2nd Leg

Dublin City win 3–2 on aggregate and are promoted to the Premier Division.

Top scorers
Source: