| Ulster Cup | |
| Year: | 2002–03 |
| Num Teams: | 8 |
| Defending Champions: | Lisburn Distillery |
| Runner-Up: | Ballymena United |
| Matches: | 28 |
| Goals: | 89 |
| Prevseason: | 1998–99 |
| Nextseason: | Last |
The 2002–03 Ulster Cup was the 52nd and final edition of the Ulster Cup, a cup competition in Northern Irish football. This edition featured only clubs from the First Division.[1]
Dungannon Swifts won the tournament for the 1st time, finishing top of the group standings.[2]