| Irish Cup | |
| Year: | 1958–59 |
| Num Teams: | 16 |
| Defending Champions: | Ballymena United |
| Winners: | Glenavon (2nd win) |
| Second: | Ballymena United |
| Matches: | 19 |
| Goals: | 82 |
| Prev Season: | 1957–58 |
| Next Season: | 1959–60 |
The 1958–59 Irish Cup was the 79th edition of the Irish Cup, the premier knock-out cup competition in Northern Irish football.
Glenavon won the cup for the 2nd time, defeating the holders Ballymena United 2–0 in the final replay at Windsor Park after the first match had finished in a draw.[1] [2]
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