The 2002–03 Irish League was the 102nd edition of the Irish League, the highest level of league competition in Northern Irish football.
The league consisted of 12 teams, and Glentoran won the championship.
As this is the fourth time that teams play each other this season, home sides are chosen so that they will have played each other twice at home and twice away.
Newry Town, who finished in the relegation play-off place, faced Bangor, the 5th-placed team in the First Division, in a two-legged tie for a place in next season's Irish Premier League.
Newry Town won 2–1 on aggregate