| Ulster Cup | |
| Year: | 1988–89 |
| Num Teams: | 16 |
| Defending Champions: | Larne |
| Winners: | Glentoran (8th win) |
| Second: | Larne |
| Matches: | 31 |
| Goals: | 94 |
| Prev Season: | 1987–88 |
| Next Season: | 1989–90 |
The 1988–89 Ulster Cup was the 41st edition of the Ulster Cup, a cup competition in Northern Irish football.[1]
Glentoran won the tournament for the 8th time, defeating Larne 5–2 in the final.[2] [3] [4]
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